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• How to switch between views in android?

  - by aurezza

  I've tried several methods to switch between two views in my program. I've tried creating a new thread then have the view run for 5 seconds before creating intent to start my main activity. This is the code snippet from the said view class: mHelpThread = new Thread(){ @Override public void run(){ try { synchronized(this){ // Wait given period of time or exit on touch wait(5000); } } catch(InterruptedException ex){ } finish(); // Run next activity Intent intent = new Intent(Intent.ACTION_MAIN, null); intent.addCategory(Intent.CATEGORY_HOME); startActivity(intent); //stop(); } }; mHelpThread.start(); I can access the said view without error but it doesn't disappear after 5 seconds nor did it switched to main view when I even utilized an onTouchEvent() to detect touch on the screen of which it should have automatically closed. I've also tried adding a button on the said view to manually switch to main view: @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.help); final HelpView helpView = this; final Button btnback = (Button) findViewById(R.id.back); btnback.setOnClickListener(new View.OnClickListener(){ public void onClick(View v) { Intent intent = new Intent(helpView, MainActivity.class); startActivity(intent); } }); } These codes worked, though, for creating a launcher for my program. So I thought that it would work the same if I added an option for help/rules(for the game) that would switch to another view. I've only since started using eclipse for android so pardon my lack of knowledge. Here is also the snippet from my manifest: <uses-sdk android:minSdkVersion="11" android:targetSdkVersion="15" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="MainActivity" android:label="@string/title_activity_main"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.DEFAULT"/> </intent-filter> <intent-filter></intent-filter> </activity> <activity android:name="SplashScreen" android:theme="@style/Theme.Transparent"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> <activity android:name="HelpView" android:theme="@style/Theme.Transparent"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.DEFAULT"/> </intent-filter> <intent-filter></intent-filter> </activity> </application>

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• Android ListView TextSize

  - by zaid

  my listview.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout android:id="@+id/RelativeLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:myapp="http://schemas.android.com/apk/res/zaid.quotes.dlama"> <ListView android:id="@+id/ListView01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_marginBottom="50dp" android:paddingTop="50dp"></ListView> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/Back" android:layout_alignParentBottom="true" android:text="Go Back"></Button> <LinearLayout android:layout_width="wrap_content" android:id="@+id/LinearLayout01" android:layout_height="wrap_content" android:layout_alignParentTop="true"> <com.admob.android.ads.AdView android:id="@+id/ad" android:layout_width="fill_parent" android:layout_height="wrap_content" myapp:backgroundColor="#000000" myapp:primaryTextColor="#FFFFFF" myapp:secondaryTextColor="#CCCCCC" android:layout_alignParentTop="true" /> </LinearLayout> </RelativeLayout> the current size of the text in the listview is large. and i cant seem to figure out how to change the text size.

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• Android 2.2 AVD: no Quick Search Box?

  - by Felix

  I have recently updated my Android SDK to include support for Android 2.2 (API level 8). The app that I'm building integrates with the Quick Search Box (QSB) home screen widget, which I can't seem to find in this version (using both vanilla 2.2 and the Google APIs version). I was kind of excited when they announced that they have improved its functionality, but it seems there's no way for me to observe it. Is this normal? Are others experiencing the same issue? Or is this somehow related to my setup (running Archlinux and installed the Android SDK from the repositories).

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• How to make an Android UI with images from a designer delivered as layers

  - by Not Me

  I hired a designer to help me redesign the UI for my Android app. For each Activity he gave me an image for the background, which includes any static content like fancy frames for text content; plus images for the buttons, which must fit in to the background image in exact places, to fit into the frames in the background image. However, since Android devices have different screen sizes and aspect ratios, it's easy to fit the background image by itself with android:scaleType="centerInside", but how can I get all the other images to fit in with background exactly, to the pixel? If they didn't have to fit in with the background, I would just set the exact width and height for each ImageButton, but depending on how the background scales (based on the screen size and ratio) they might end up not aligned correctly. Thank you very much in advance.

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• marquee text view in android

  - by raqz

  i tried various combinations as answered here in SO...but i am still not able to get the text to marquee... combination 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/organizationText" android:layout_height="38px" android:gravity="center_horizontal" android:textColor="#0099CC" android:layout_gravity="center" android:textSize="08pt" android:layout_width="wrap_content" android:maxLines="1" android:ellipsize="marquee" android:fadingEdge="horizontal" android:marqueeRepeatLimit="marquee_forever" android:scrollHorizontally="true" android:focusable="true" android:focusableInTouchMode="true" /> </RelativeLayout> orgText.setSelected(true); orgText.setEllipsize(TruncateAt.MARQUEE); orgText.setText(organization); I tried without using setSelected but it still doesnt work. any help would be appreciated... also, this entire view is a part of Linear layout.

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• Example: Communication between Activity and Service using Messaging

  - by Lance Lefebure

  I couldn't find any examples of how to send messages between an activity and a service, and spent far too many hours figuring this out. Here is an example project for others to reference. This example allows you to start or stop a service directly, and separately bind/unbind from the service. When the service is running, it increments a number at 10Hz. If the activity is bound to the service, it will display the current value. Data is transferred as an Integer and as a String so you can see how to do that two different ways. There are also buttons in the activity to send messages to the service (changes the increment-by value). Screenshot: AndroidManifest.xml: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.exampleservice" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name=".MyService"></service> </application> <uses-sdk android:minSdkVersion="8" /> </manifest> res\values\strings.xml: <?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">ExampleService</string> <string name="service_started">Example Service started</string> <string name="service_label">Example Service Label</string> </resources> res\layout\main.xml: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <RelativeLayout android:id="@+id/RelativeLayout01" android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/btnStart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Start Service"></Button> <Button android:id="@+id/btnStop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Stop Service" android:layout_alignParentRight="true"></Button> </RelativeLayout> <RelativeLayout android:id="@+id/RelativeLayout02" android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/btnBind" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Bind to Service"></Button> <Button android:id="@+id/btnUnbind" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Unbind from Service" android:layout_alignParentRight="true"></Button> </RelativeLayout> <TextView android:id="@+id/textStatus" android:textSize="24sp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Status Goes Here" /> <TextView android:id="@+id/textIntValue" android:textSize="24sp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Integer Value Goes Here" /> <TextView android:id="@+id/textStrValue" android:textSize="24sp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="String Value Goes Here" /> <RelativeLayout android:id="@+id/RelativeLayout03" android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/btnUpby1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Increment by 1"></Button> <Button android:id="@+id/btnUpby10" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Increment by 10" android:layout_alignParentRight="true"></Button> </RelativeLayout> </LinearLayout> src\com.exampleservice\MainActivity.java: package com.exampleservice; import android.app.Activity; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class MainActivity extends Activity { Button btnStart, btnStop, btnBind, btnUnbind, btnUpby1, btnUpby10; TextView textStatus, textIntValue, textStrValue; Messenger mService = null; boolean mIsBound; final Messenger mMessenger = new Messenger(new IncomingHandler()); class IncomingHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case MyService.MSG_SET_INT_VALUE: textIntValue.setText("Int Message: " + msg.arg1); break; case MyService.MSG_SET_STRING_VALUE: String str1 = msg.getData().getString("str1"); textStrValue.setText("Str Message: " + str1); break; default: super.handleMessage(msg); } } } private ServiceConnection mConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { mService = new Messenger(service); textStatus.setText("Attached."); try { Message msg = Message.obtain(null, MyService.MSG_REGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // In this case the service has crashed before we could even do anything with it } } public void onServiceDisconnected(ComponentName className) { // This is called when the connection with the service has been unexpectedly disconnected - process crashed. mService = null; textStatus.setText("Disconnected."); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btnStart = (Button)findViewById(R.id.btnStart); btnStop = (Button)findViewById(R.id.btnStop); btnBind = (Button)findViewById(R.id.btnBind); btnUnbind = (Button)findViewById(R.id.btnUnbind); textStatus = (TextView)findViewById(R.id.textStatus); textIntValue = (TextView)findViewById(R.id.textIntValue); textStrValue = (TextView)findViewById(R.id.textStrValue); btnUpby1 = (Button)findViewById(R.id.btnUpby1); btnUpby10 = (Button)findViewById(R.id.btnUpby10); btnStart.setOnClickListener(btnStartListener); btnStop.setOnClickListener(btnStopListener); btnBind.setOnClickListener(btnBindListener); btnUnbind.setOnClickListener(btnUnbindListener); btnUpby1.setOnClickListener(btnUpby1Listener); btnUpby10.setOnClickListener(btnUpby10Listener); restoreMe(savedInstanceState); CheckIfServiceIsRunning(); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putString("textStatus", textStatus.getText().toString()); outState.putString("textIntValue", textIntValue.getText().toString()); outState.putString("textStrValue", textStrValue.getText().toString()); } private void restoreMe(Bundle state) { if (state!=null) { textStatus.setText(state.getString("textStatus")); textIntValue.setText(state.getString("textIntValue")); textStrValue.setText(state.getString("textStrValue")); } } private void CheckIfServiceIsRunning() { //If the service is running when the activity starts, we want to automatically bind to it. if (MyService.isRunning()) { doBindService(); } } private OnClickListener btnStartListener = new OnClickListener() { public void onClick(View v){ startService(new Intent(MainActivity.this, MyService.class)); } }; private OnClickListener btnStopListener = new OnClickListener() { public void onClick(View v){ doUnbindService(); stopService(new Intent(MainActivity.this, MyService.class)); } }; private OnClickListener btnBindListener = new OnClickListener() { public void onClick(View v){ doBindService(); } }; private OnClickListener btnUnbindListener = new OnClickListener() { public void onClick(View v){ doUnbindService(); } }; private OnClickListener btnUpby1Listener = new OnClickListener() { public void onClick(View v){ sendMessageToService(1); } }; private OnClickListener btnUpby10Listener = new OnClickListener() { public void onClick(View v){ sendMessageToService(10); } }; private void sendMessageToService(int intvaluetosend) { if (mIsBound) { if (mService != null) { try { Message msg = Message.obtain(null, MyService.MSG_SET_INT_VALUE, intvaluetosend, 0); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { } } } } void doBindService() { bindService(new Intent(this, MyService.class), mConnection, Context.BIND_AUTO_CREATE); mIsBound = true; textStatus.setText("Binding."); } void doUnbindService() { if (mIsBound) { // If we have received the service, and hence registered with it, then now is the time to unregister. if (mService != null) { try { Message msg = Message.obtain(null, MyService.MSG_UNREGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // There is nothing special we need to do if the service has crashed. } } // Detach our existing connection. unbindService(mConnection); mIsBound = false; textStatus.setText("Unbinding."); } } @Override protected void onDestroy() { super.onDestroy(); try { doUnbindService(); } catch (Throwable t) { Log.e("MainActivity", "Failed to unbind from the service", t); } } } src\com.exampleservice\MyService.java: package com.exampleservice; import java.util.ArrayList; import java.util.Timer; import java.util.TimerTask; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.util.Log; public class MyService extends Service { private NotificationManager nm; private Timer timer = new Timer(); private int counter = 0, incrementby = 1; private static boolean isRunning = false; ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients. int mValue = 0; // Holds last value set by a client. static final int MSG_REGISTER_CLIENT = 1; static final int MSG_UNREGISTER_CLIENT = 2; static final int MSG_SET_INT_VALUE = 3; static final int MSG_SET_STRING_VALUE = 4; final Messenger mMessenger = new Messenger(new IncomingHandler()); // Target we publish for clients to send messages to IncomingHandler. @Override public IBinder onBind(Intent intent) { return mMessenger.getBinder(); } class IncomingHandler extends Handler { // Handler of incoming messages from clients. @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_REGISTER_CLIENT: mClients.add(msg.replyTo); break; case MSG_UNREGISTER_CLIENT: mClients.remove(msg.replyTo); break; case MSG_SET_INT_VALUE: incrementby = msg.arg1; break; default: super.handleMessage(msg); } } } private void sendMessageToUI(int intvaluetosend) { for (int i=mClients.size()-1; i>=0; i--) { try { // Send data as an Integer mClients.get(i).send(Message.obtain(null, MSG_SET_INT_VALUE, intvaluetosend, 0)); //Send data as a String Bundle b = new Bundle(); b.putString("str1", "ab" + intvaluetosend + "cd"); Message msg = Message.obtain(null, MSG_SET_STRING_VALUE); msg.setData(b); mClients.get(i).send(msg); } catch (RemoteException e) { // The client is dead. Remove it from the list; we are going through the list from back to front so this is safe to do inside the loop. mClients.remove(i); } } } @Override public void onCreate() { super.onCreate(); Log.i("MyService", "Service Started."); showNotification(); timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 0, 100L); isRunning = true; } private void showNotification() { nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); // In this sample, we'll use the same text for the ticker and the expanded notification CharSequence text = getText(R.string.service_started); // Set the icon, scrolling text and timestamp Notification notification = new Notification(R.drawable.icon, text, System.currentTimeMillis()); // The PendingIntent to launch our activity if the user selects this notification PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0); // Set the info for the views that show in the notification panel. notification.setLatestEventInfo(this, getText(R.string.service_label), text, contentIntent); // Send the notification. // We use a layout id because it is a unique number. We use it later to cancel. nm.notify(R.string.service_started, notification); } @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.i("MyService", "Received start id " + startId + ": " + intent); return START_STICKY; // run until explicitly stopped. } public static boolean isRunning() { return isRunning; } private void onTimerTick() { Log.i("TimerTick", "Timer doing work." + counter); try { counter += incrementby; sendMessageToUI(counter); } catch (Throwable t) { //you should always ultimately catch all exceptions in timer tasks. Log.e("TimerTick", "Timer Tick Failed.", t); } } @Override public void onDestroy() { super.onDestroy(); if (timer != null) {timer.cancel();} counter=0; nm.cancel(R.string.service_started); // Cancel the persistent notification. Log.i("MyService", "Service Stopped."); isRunning = false; } }

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• Android - Problem in Edittext

  - by PM - Paresh Mayani

  Hi, I am facing trouble to set WrapText kind of facility in EditText. Problem: When i try tp enter data in EditText, it goes beyond the screen width (scrolling horizontally). Instead of it should be appear in next-line. Please suggest me what should i do ?? Please have a look at below image: I have done the below XML coding: <TableLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingTop="10dp" android:paddingLeft="10dp" android:paddingRight="10dp" android:stretchColumns="1"> <TableRow android:id="@+id/TableRow02" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:text="Name:" android:id="@+id/TextView01" android:layout_width="80dp" android:layout_height="wrap_content" android:textSize="16dip"> </TextView> <EditText android:id="@+id/txtViewName" android:layout_height="wrap_content" android:layout_width="wrap_content" android:inputType="textFilter|textMultiLine|textNoSuggestions" android:scrollHorizontally="false"> </EditText> </TableRow> </TableLayout>

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• Android RadioButton like Behaviour

  - by monxalo

  Greetings, I'm trying to create a single-choice android control, in a horizontal layout, by making use of the RadioGroup behaviour. I can assign the drawable just fine, but i would like to position the label of each RadioButton inside the drawable, is this possible using the standard APIs? <RadioGroup android:id="@+id/switchcontainer" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" android:checkedButton="@+id/RadioButton02" android:padding="3dip"> <RadioButton android:text="id RadioButton02" android:id="@+id/RadioButton02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:button="@drawable/radio_button" android:paddingRight="2dip" /> <RadioButton android:text="@+id/RadioButton03" android:id="@+id/RadioButton03" android:layout_width="wrap_content" android:layout_height="wrap_content" android:button="@drawable/radio_button" android:paddingRight="2dip" />> </RadioGroup>

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• Example: Communication between Activity and Service using Messaging

  - by Lance Lefebure

  I couldn't find any examples of how to send messages between an activity and a service, and spent far too many hours figuring this out. Here is an example project for others to reference. This example allows you to start or stop a service directly, and separately bind/unbind from the service. When the service is running, it increments a number at 10Hz. If the activity is bound to the service, it will display the current value. Data is transferred as an Integer and as a String so you can see how to do that two different ways. There are also buttons in the activity to send messages to the service (changes the increment-by value). Screenshot: AndroidManifest.xml: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.exampleservice" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name=".MyService"></service> </application> <uses-sdk android:minSdkVersion="8" /> </manifest> res\values\strings.xml: <?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">ExampleService</string> <string name="service_started">Example Service started</string> <string name="service_label">Example Service Label</string> </resources> res\layout\main.xml: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <RelativeLayout android:id="@+id/RelativeLayout01" android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/btnStart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Start Service"></Button> <Button android:id="@+id/btnStop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Stop Service" android:layout_alignParentRight="true"></Button> </RelativeLayout> <RelativeLayout android:id="@+id/RelativeLayout02" android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/btnBind" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Bind to Service"></Button> <Button android:id="@+id/btnUnbind" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Unbind from Service" android:layout_alignParentRight="true"></Button> </RelativeLayout> <TextView android:id="@+id/textStatus" android:textSize="24sp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Status Goes Here" /> <TextView android:id="@+id/textIntValue" android:textSize="24sp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Integer Value Goes Here" /> <TextView android:id="@+id/textStrValue" android:textSize="24sp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="String Value Goes Here" /> <RelativeLayout android:id="@+id/RelativeLayout03" android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/btnUpby1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Increment by 1"></Button> <Button android:id="@+id/btnUpby10" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Increment by 10" android:layout_alignParentRight="true"></Button> </RelativeLayout> </LinearLayout> src\com.exampleservice\MainActivity.java: package com.exampleservice; import android.app.Activity; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class MainActivity extends Activity { Button btnStart, btnStop, btnBind, btnUnbind, btnUpby1, btnUpby10; TextView textStatus, textIntValue, textStrValue; Messenger mService = null; boolean mIsBound; final Messenger mMessenger = new Messenger(new IncomingHandler()); class IncomingHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case MyService.MSG_SET_INT_VALUE: textIntValue.setText("Int Message: " + msg.arg1); break; case MyService.MSG_SET_STRING_VALUE: String str1 = msg.getData().getString("str1"); textStrValue.setText("Str Message: " + str1); break; default: super.handleMessage(msg); } } } private ServiceConnection mConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { mService = new Messenger(service); textStatus.setText("Attached."); try { Message msg = Message.obtain(null, MyService.MSG_REGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // In this case the service has crashed before we could even do anything with it } } public void onServiceDisconnected(ComponentName className) { // This is called when the connection with the service has been unexpectedly disconnected - process crashed. mService = null; textStatus.setText("Disconnected."); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btnStart = (Button)findViewById(R.id.btnStart); btnStop = (Button)findViewById(R.id.btnStop); btnBind = (Button)findViewById(R.id.btnBind); btnUnbind = (Button)findViewById(R.id.btnUnbind); textStatus = (TextView)findViewById(R.id.textStatus); textIntValue = (TextView)findViewById(R.id.textIntValue); textStrValue = (TextView)findViewById(R.id.textStrValue); btnUpby1 = (Button)findViewById(R.id.btnUpby1); btnUpby10 = (Button)findViewById(R.id.btnUpby10); btnStart.setOnClickListener(btnStartListener); btnStop.setOnClickListener(btnStopListener); btnBind.setOnClickListener(btnBindListener); btnUnbind.setOnClickListener(btnUnbindListener); btnUpby1.setOnClickListener(btnUpby1Listener); btnUpby10.setOnClickListener(btnUpby10Listener); restoreMe(savedInstanceState); CheckIfServiceIsRunning(); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putString("textStatus", textStatus.getText().toString()); outState.putString("textIntValue", textIntValue.getText().toString()); outState.putString("textStrValue", textStrValue.getText().toString()); } private void restoreMe(Bundle state) { if (state!=null) { textStatus.setText(state.getString("textStatus")); textIntValue.setText(state.getString("textIntValue")); textStrValue.setText(state.getString("textStrValue")); } } private void CheckIfServiceIsRunning() { //If the service is running when the activity starts, we want to automatically bind to it. if (MyService.isRunning()) { doBindService(); } } private OnClickListener btnStartListener = new OnClickListener() { public void onClick(View v){ startService(new Intent(MainActivity.this, MyService.class)); } }; private OnClickListener btnStopListener = new OnClickListener() { public void onClick(View v){ doUnbindService(); stopService(new Intent(MainActivity.this, MyService.class)); } }; private OnClickListener btnBindListener = new OnClickListener() { public void onClick(View v){ doBindService(); } }; private OnClickListener btnUnbindListener = new OnClickListener() { public void onClick(View v){ doUnbindService(); } }; private OnClickListener btnUpby1Listener = new OnClickListener() { public void onClick(View v){ sendMessageToService(1); } }; private OnClickListener btnUpby10Listener = new OnClickListener() { public void onClick(View v){ sendMessageToService(10); } }; private void sendMessageToService(int intvaluetosend) { if (mIsBound) { if (mService != null) { try { Message msg = Message.obtain(null, MyService.MSG_SET_INT_VALUE, intvaluetosend, 0); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { } } } } void doBindService() { bindService(new Intent(this, MyService.class), mConnection, Context.BIND_AUTO_CREATE); mIsBound = true; textStatus.setText("Binding."); } void doUnbindService() { if (mIsBound) { // If we have received the service, and hence registered with it, then now is the time to unregister. if (mService != null) { try { Message msg = Message.obtain(null, MyService.MSG_UNREGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // There is nothing special we need to do if the service has crashed. } } // Detach our existing connection. unbindService(mConnection); mIsBound = false; textStatus.setText("Unbinding."); } } @Override protected void onDestroy() { super.onDestroy(); try { doUnbindService(); } catch (Throwable t) { Log.e("MainActivity", "Failed to unbind from the service", t); } } } src\com.exampleservice\MyService.java: package com.exampleservice; import java.util.ArrayList; import java.util.Timer; import java.util.TimerTask; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.util.Log; public class MyService extends Service { private NotificationManager nm; private Timer timer = new Timer(); private int counter = 0, incrementby = 1; private static boolean isRunning = false; ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients. int mValue = 0; // Holds last value set by a client. static final int MSG_REGISTER_CLIENT = 1; static final int MSG_UNREGISTER_CLIENT = 2; static final int MSG_SET_INT_VALUE = 3; static final int MSG_SET_STRING_VALUE = 4; final Messenger mMessenger = new Messenger(new IncomingHandler()); // Target we publish for clients to send messages to IncomingHandler. @Override public IBinder onBind(Intent intent) { return mMessenger.getBinder(); } class IncomingHandler extends Handler { // Handler of incoming messages from clients. @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_REGISTER_CLIENT: mClients.add(msg.replyTo); break; case MSG_UNREGISTER_CLIENT: mClients.remove(msg.replyTo); break; case MSG_SET_INT_VALUE: incrementby = msg.arg1; break; default: super.handleMessage(msg); } } } private void sendMessageToUI(int intvaluetosend) { for (int i=mClients.size()-1; i>=0; i--) { try { // Send data as an Integer mClients.get(i).send(Message.obtain(null, MSG_SET_INT_VALUE, intvaluetosend, 0)); //Send data as a String Bundle b = new Bundle(); b.putString("str1", "ab" + intvaluetosend + "cd"); Message msg = Message.obtain(null, MSG_SET_STRING_VALUE); msg.setData(b); mClients.get(i).send(msg); } catch (RemoteException e) { // The client is dead. Remove it from the list; we are going through the list from back to front so this is safe to do inside the loop. mClients.remove(i); } } } @Override public void onCreate() { super.onCreate(); Log.i("MyService", "Service Started."); showNotification(); timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 0, 100L); isRunning = true; } private void showNotification() { nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); // In this sample, we'll use the same text for the ticker and the expanded notification CharSequence text = getText(R.string.service_started); // Set the icon, scrolling text and timestamp Notification notification = new Notification(R.drawable.icon, text, System.currentTimeMillis()); // The PendingIntent to launch our activity if the user selects this notification PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0); // Set the info for the views that show in the notification panel. notification.setLatestEventInfo(this, getText(R.string.service_label), text, contentIntent); // Send the notification. // We use a layout id because it is a unique number. We use it later to cancel. nm.notify(R.string.service_started, notification); } @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.i("MyService", "Received start id " + startId + ": " + intent); return START_STICKY; // run until explicitly stopped. } public static boolean isRunning() { return isRunning; } private void onTimerTick() { Log.i("TimerTick", "Timer doing work." + counter); try { counter += incrementby; sendMessageToUI(counter); } catch (Throwable t) { //you should always ultimately catch all exceptions in timer tasks. Log.e("TimerTick", "Timer Tick Failed.", t); } } @Override public void onDestroy() { super.onDestroy(); if (timer != null) {timer.cancel();} counter=0; nm.cancel(R.string.service_started); // Cancel the persistent notification. Log.i("MyService", "Service Stopped."); isRunning = false; } }

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• Process: Unable to start service com.google.android.gms.checkin.CheckinService with Intent

  - by AndyRoid

  I'm trying to build a Google map application but keep receiving this in my LogCat. I have all the permissions and meta-data set in my manifest, but am still dumbfounded by this error. Have looked everywhere on SO for this specific error but found nothing relating to com.google.android.gms.checkin A little bit about my structural hierarchy. MainActivity extends ActionBarActivity with three tabs underneath actionbar. Each tab has it's own fragment. On the gMapFragment I create a GPSTrack object from my GPSTrack class which extends Service and implements LocationListener. The problem is that when I start the application I get this message: I have all my libraries imported properly and I even added the google-play-services.jar into my libs folder. I also installed Google Play Services APKs through CMD onto my emulator. Furthermore the LocationManager lm = = (LocationManager) mContext.getSystemService(LOCATION_SERVICE); in my GPSTrack class always returns null. Why is this and how can I fix these issues? Would appreciate an explanation along with solution too, I want to understand what's going on here. ============== Code: gMapFragment.java public class gMapFragment extends SupportMapFragment { private final String TAG = "gMapFragment"; private GoogleMap mMap; protected SupportMapFragment mapFrag; private Context mContext = getActivity(); private static View view; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (view != null) { ViewGroup parent = (ViewGroup) view.getParent(); if (parent != null) { parent.removeView(view); } } try { super.onCreateView(inflater, container, savedInstanceState); view = inflater.inflate(R.layout.fragment_map, container, false); setupGoogleMap(); } catch (Exception e) { /* * Map already there , just return as view */ } return view; } private void setupGoogleMap() { mapFrag = (SupportMapFragment) getFragmentManager().findFragmentById( R.id.mapView); if (mapFrag == null) { FragmentManager fragManager = getFragmentManager(); FragmentTransaction fragTransaction = fragManager .beginTransaction(); mapFrag = SupportMapFragment.newInstance(); fragTransaction.replace(R.id.mapView, mapFrag).commit(); } if (mapFrag != null) { mMap = mapFrag.getMap(); if (mMap != null) { setupMap(); mMap.setOnMapClickListener(new OnMapClickListener() { @Override public void onMapClick(LatLng point) { // TODO your click stuff on map } }); } } } @Override public void onAttach(Activity activity) { super.onAttach(activity); Log.d("Attach", "on attach"); } @Override public void onDetach() { super.onDetach(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public void onResume() { super.onResume(); } @Override public void onPause() { super.onPause(); } @Override public void onDestroy() { super.onDestroy(); } private void setupMap() { GPSTrack gps = new GPSTrack(mContext); // Enable MyLocation layer of google map mMap.setMyLocationEnabled(true); Log.d(TAG, "MyLocation enabled"); // Set Map type mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); // Grab current location **ERROR HERE/Returns Null** Location location = gps.getLocation(); Log.d(TAG, "Grabbing location..."); if (location != null) { Log.d(TAG, "location != null"); // Grab Latitude and Longitude double latitude = location.getLatitude(); double longitude = location.getLongitude(); Log.d(TAG, "Getting lat, long.."); // Initialize LatLng object LatLng latLng = new LatLng(latitude, longitude); Log.d(TAG, "LatLng initialized"); // Show current location on google map mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); // Zoom in on google map mMap.animateCamera(CameraUpdateFactory.zoomTo(20)); mMap.addMarker(new MarkerOptions().position( new LatLng(latitude, longitude)).title("You are here.")); } else { gps.showSettingsAlert(); } } } GPSTrack.java public class GPSTrack extends Service implements LocationListener{ private final Context mContext; private boolean isGPSEnabled = false; //See if network is connected to internet private boolean isNetworkEnabled = false; //See if you can grab the location private boolean canGetLocation = false; protected Location location = null; protected double latitude; protected double longitude; private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 10; //10 Meters private static final long MINIMUM_TIME_CHANGE_FOR_UPDATES = 1000 * 60 * 1; //1 minute protected LocationManager locationManager; public GPSTrack(Context context) { this.mContext = context; getLocation(); } public Location getLocation() { try { //Setup locationManager for controlling location services **ERROR HERE/Return Null** locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE); //See if GPS is enabled isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); //See if Network is connected to the internet or carrier service isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (!isGPSEnabled && !isNetworkEnabled) { Toast.makeText(getApplicationContext(), "No Network Provider Available", Toast.LENGTH_SHORT).show(); } else { this.canGetLocation = true; if (isNetworkEnabled) { locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, MINIMUM_TIME_CHANGE_FOR_UPDATES, MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, this); Log.d("GPS", "GPS Enabled"); if (locationManager != null) { location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); } } } } } catch (Exception e) { e.printStackTrace(); } return location; } public void stopUsingGPS() { if (locationManager != null) { locationManager.removeUpdates(GPSTrack.this); } } public double getLatitude() { if (location != null) { latitude = location.getLatitude(); } return latitude; } public double getLongitude() { if (location != null) { longitude = location.getLongitude(); } return longitude; } public boolean canGetLocation() { return this.canGetLocation; } public void showSettingsAlert() { AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); //AlertDialog title alertDialog.setTitle("GPS Settings"); //AlertDialog message alertDialog.setMessage("GPS is not enabled. Do you want to go to Settings?"); alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); mContext.startActivity(i); } }); alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.cancel(); } }); alertDialog.show(); } @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return null; } } logcat 06-08 22:35:03.441: E/AndroidRuntime(1370): FATAL EXCEPTION: main 06-08 22:35:03.441: E/AndroidRuntime(1370): Process: com.google.android.gms, PID: 1370 06-08 22:35:03.441: E/AndroidRuntime(1370): java.lang.RuntimeException: Unable to start service com.google.android.gms.checkin.CheckinService@b1094e48 with Intent { cmp=com.google.android.gms/.checkin.CheckinService }: java.lang.SecurityException: attempting to read gservices without permission: Neither user 10053 nor current process has com.google.android.providers.gsf.permission.READ_GSERVICES. 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2719) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.access$2100(ActivityThread.java:135) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1293) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.os.Handler.dispatchMessage(Handler.java:102) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.os.Looper.loop(Looper.java:136) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.main(ActivityThread.java:5017) 06-08 22:35:03.441: E/AndroidRuntime(1370): at java.lang.reflect.Method.invokeNative(Native Method) 06-08 22:35:03.441: E/AndroidRuntime(1370): at java.lang.reflect.Method.invoke(Method.java:515) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 06-08 22:35:03.441: E/AndroidRuntime(1370): at dalvik.system.NativeStart.main(Native Method) 06-08 22:35:03.441: E/AndroidRuntime(1370): Caused by: java.lang.SecurityException: attempting to read gservices without permission: Neither user 10053 nor current process has com.google.android.providers.gsf.permission.READ_GSERVICES. 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ContextImpl.enforce(ContextImpl.java:1685) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ContextImpl.enforceCallingOrSelfPermission(ContextImpl.java:1714) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.content.ContextWrapper.enforceCallingOrSelfPermission(ContextWrapper.java:572) 06-08 22:35:03.441: E/AndroidRuntime(1370): at imq.c(SourceFile:107) 06-08 22:35:03.441: E/AndroidRuntime(1370): at imq.a(SourceFile:121) 06-08 22:35:03.441: E/AndroidRuntime(1370): at imq.a(SourceFile:227) 06-08 22:35:03.441: E/AndroidRuntime(1370): at bwq.c(SourceFile:166) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.google.android.gms.checkin.CheckinService.a(SourceFile:237) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.google.android.gms.checkin.CheckinService.onStartCommand(SourceFile:211) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2702) AndroidManifest <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.app" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="19" /> <uses-permission android:name="com.curio.permission.MAPS_RECEIVE" /> <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" /> <uses-feature android:name="android.hardware.camera" android:required="true" /> <uses-feature android:glEsVersion="0x00020000" android:required="true" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.app.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" /> <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="AI........................" /> </application>

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• Resizing layouts for orientation change?

  - by Cole

  Normal: Landscape: See how the ListView overlaps other things on the screen when in landscape mode? How can I keep this from happening? XML: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:id="@+id/main" > <RelativeLayout android:id="@+id/myWishLists" android:layout_width="fill_parent" android:layout_height="50dp"> <Spinner android:id="@+id/spinner1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:prompt="@string/optionsSpinner" android:entries="@array/options" /> </RelativeLayout> <TextView android:id="@+id/myListsText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/myWishLists" android:layout_centerHorizontal="true" android:text="My Wish Lists" android:textStyle="bold" android:textAppearance="?android:attr/textAppearanceLarge" /> <RelativeLayout android:id="@+id/listsList" android:layout_width="fill_parent" android:layout_height="445dp" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true"> <ListView android:id="@+id/lists" android:layout_width="fill_parent" android:layout_height="fill_parent" android:entries="@array/entries" > </ListView> </RelativeLayout> </RelativeLayout>

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• Sharing a file from Android to Gmail or to Dropbox

  - by Calaf

  To share a simple text file, I started by copying verbatim from FileProvider's manual page: <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <provider android:name="android.support.v4.content.FileProvider" android:authorities="com.mycorp.helloworldtxtfileprovider.MainActivity" android:exported="false" android:grantUriPermissions="true" > <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/my_paths" /> </provider> <activity android:name="com.mycorp.helloworldtxtfileprovider.MainActivity" ... Then I saved a text file and used, again nearly verbatim, the code under Sending binary content. (Notice that this applies more accurately in this case than "Sending text content" since we are sending a file, which happens to be a text file, rather than just a string of text.) For the convenience of duplication on your side, and since the code is in any case so brief, I'm including it here in full. public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); String filename = "hellow.txt"; String fileContents = "Hello, World!\n"; byte[] bytes = fileContents.getBytes(); FileOutputStream fos = null; try { fos = this.openFileOutput(filename, MODE_PRIVATE); fos.write(bytes); } catch (IOException e) { e.printStackTrace(); } finally { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } File file = new File(filename); Intent shareIntent = new Intent(); shareIntent.setAction(Intent.ACTION_SEND); shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file)); shareIntent.setType("application/txt"); startActivity(Intent.createChooser(shareIntent, getResources().getText(R.string.send_to))); file.delete(); } } Aside from adding a value for send_to in res/values/strings.xml, the only other change I did to the generic Hello, World that Eclipse creates is to add the following in res/xml/my_paths.xml (as described on the page previously referenced. <paths xmlns:android="http://schemas.android.com/apk/res/android"> <Files-path name="files" path="." /> </paths> This code runs fine. It shows a list of intent recipients. But sending the text file to either Dropbox or to Gmail fails. Dropbox sends the notification "Uploading to Dropbox" followed by "Upload failed: my_file.txt". After "sending message.." Gmail sends "Couldn't send attachment". What is wrong?

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• Android ScrollView issue

  - by Salman

  Guys, We are trying to make a board with sticky notes. We have used ScrollView in which we have LinearLayout. We have four columns. If there are more than 3 notes in one column, scrollview comes up. Issue is, if I try to move Row 5 column 1 note to Row 1 Column 2, scroll views hides all the notes. If we scroll to top of the board, notes become visible again. Any idea what's the issue ? Thanks Salman

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• Android ListView appears empty, but contains objects

  - by Lethjakman

  I'm having a really odd problem with my android listview. The listview is inside of a fragment, everything's compiling and I'm no longer getting a nullpointer error, but the listview is appearing empty. Even though it's appearing empty, the log is stating that the listview has 385 objects. I can't figure out why it's empty. I do get a blue fragment, and the listview is populated. Any ideas? How I set the adapter: ActivePackages = getList(); LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); LinearLayout mContainer = (LinearLayout) inflater.inflate(R.layout.tab_frag1_layout, null); ListView activeList = (ListView) mContainer.findViewById(R.id.activelist); ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, ActivePackages); Log.i("valueof activeList",String.valueOf(activeList.getCount())); //returns 0 activeList.setAdapter(adapter); adapter.notifyDataSetChanged(); Log.i("valueof activeList",String.valueOf(activeList.getCount())); //returns 385. This is the xml for the fragment: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ListView android:id="@+id/activelist" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#0073fd"> </ListView> </LinearLayout>

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• Android, FragmentActivity and prevent Swipe

  - by FIG-GHD742

  I use android.support.v4.app.FragmentActivity for create a app with multi fragment/panels that can be access by drag/swipe between different part of the app. In one of my fragment I has a zoomable view and my problem is in case I is on the zoomable view I will prevent the use for drag/swipe to a other fragment. I has try to hack into android.support.v4.view.ViewPager for get the action from on Touch event but not work. I has try all of this case but not work: (All code is a a part of subclass to android.support.v4.view.ViewPager) Case 1: // Not working @Override protected void onPageScrolled(int position, float offset, int offsetPixels) { if (isPreventDrag()) { super.onPageScrolled(position, 1, 0); } else { super.onPageScrolled(position, offset, offsetPixels); } } Case 2: // Work but stop all event include the event to the target image view. @Override public boolean onInterceptTouchEvent(MotionEvent ev) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: lastX = ev.getX(); // float lockScroll = false; return super.onInterceptTouchEvent(ev); case MotionEvent.ACTION_MOVE: this.lockScroll = this.isPreventDrag(); break; } if (lockScroll) { ev.setLocation(lastX, ev.getY()); return super.onInterceptTouchEvent(ev); } else { return super.onInterceptTouchEvent(ev); } } Case 3: // Work good, but by some unknown error I can drag the screen // some pixels before this stop the event. @Override public boolean onTouchEvent(MotionEvent ev) { if (this.isPreventDrag()) { return true; } else { return super.onTouchEvent(ev); } } I want a easy way to deactivate stop or deactivate if the use is allow to switch to a other Fragment. Here is a working code for me, I don't know what error I do before. // This work for me, @Override public boolean onInterceptTouchEvent(MotionEvent ev) { if (this.isPreventDrag()) { return false; } else { return super.onInterceptTouchEvent(ev); } }

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• java.lang.RuntimeException: Unable to start activity ComponentInfo cannot be cast to android.widget.ZoomControls

  - by Hwl

  I'm new to android development, hope you all can help me. I got this androidVNC viewer source code from internet. When i'm running the androidVNC application in the emulator, it will exit automatically then i get following errors in LogCat. Can anyone one help me? Thanks. FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo{android.androidVNC/android.androidVNC.VncCanvasActivity}: java.lang.ClassCastException: com.antlersoft.android.zoomer.ZoomControls cannot be cast to android.widget.ZoomControls at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) at android.app.ActivityThread.access$600(ActivityThread.java:122) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4340) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassCastException: com.antlersoft.android.zoomer.ZoomControls cannot be cast to android.widget.ZoomControls at android.androidVNC.VncCanvasActivity.onCreate(VncCanvasActivity.java:585) at android.app.Activity.performCreate(Activity.java:4465) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) ... 11 more This is the ZoomControls java file: package com.antlersoft.android.zoomer; import android.content.Context; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.animation.AlphaAnimation; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.ZoomButton; public class ZoomControls extends LinearLayout { private final ZoomButton mZoomIn; private final ZoomButton mZoomOut; private final ImageButton mZoomKeyboard; public ZoomControls(Context context) { this(context, null); } public ZoomControls(Context context, AttributeSet attrs) { super(context, attrs); setFocusable(false); LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); inflater.inflate(R.layout.zoom_controls, this, // we are the parent true); mZoomIn = (ZoomButton) findViewById(R.id.zoomIn); mZoomOut = (ZoomButton) findViewById(R.id.zoomOut); mZoomKeyboard = (ImageButton) findViewById(R.id.zoomKeys); } public void setOnZoomInClickListener(OnClickListener listener) { mZoomIn.setOnClickListener(listener); } public void setOnZoomOutClickListener(OnClickListener listener) { mZoomOut.setOnClickListener(listener); } public void setOnZoomKeyboardClickListener(OnClickListener listener) { mZoomKeyboard.setOnClickListener(listener); } /* * Sets how fast you get zoom events when the user holds down the * zoom in/out buttons. */ public void setZoomSpeed(long speed) { mZoomIn.setZoomSpeed(speed); mZoomOut.setZoomSpeed(speed); } @Override public boolean onTouchEvent(MotionEvent event) { /* Consume all touch events so they don't get dispatched to the view * beneath this view. */ return true; } public void show() { fade(View.VISIBLE, 0.0f, 1.0f); } public void hide() { fade(View.GONE, 1.0f, 0.0f); } private void fade(int visibility, float startAlpha, float endAlpha) { AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha); anim.setDuration(500); startAnimation(anim); setVisibility(visibility); } public void setIsZoomInEnabled(boolean isEnabled) { mZoomIn.setEnabled(isEnabled); } public void setIsZoomOutEnabled(boolean isEnabled) { mZoomOut.setEnabled(isEnabled); } @Override public boolean hasFocus() { return mZoomIn.hasFocus() || mZoomOut.hasFocus(); } } This is the zoom_controls XML file: <merge xmlns:android="http://schemas.android.com/apk/res/android"> <ZoomButton android:id="@+id/zoomOut" android:background="@drawable/btn_zoom_down" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageButton android:id="@+id/zoomKeys" android:background="@android:drawable/ic_dialog_dialer" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ZoomButton android:id="@+id/zoomIn" android:background="@drawable/btn_zoom_up" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </merge>

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• Unable to stretch TableLayout to screen width

  - by Rendrik

  I've tried unsuccessfully for quite a few hours now to simply get a TableLayout to scale to the full screen. I've tried stretchColumns, shrinkColumns, (specifying the column index or using *) you name it. It's almost as if the parent element (TableLayout) is completely ignoring 'android:layout_width="fill_parent"'. I've read through similar questions here, though they haven't solved it for me. The XML below has 3 rows, and the table always shrink wraps to the size of the content. Apparently I'm too new to post pictures(?) Here is the XML rendered into the project i'm working on. http://www.dashiva.com/images/Capture.png What am I missing here, it's quite frustrating! <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:stretchColumns="*"> <TableRow> <TextView android:id="@+id/AmountText" android:text="@string/general_amount" android:paddingRight="8dip" android:layout_gravity="center"></TextView> <TextView android:id="@+id/CardText" android:text="@string/general_card" android:paddingRight="8dip" android:layout_gravity="center"></TextView> <TextView android:text="@string/general_date" android:id="@+id/DateText" android:paddingRight="8dip" android:layout_gravity="center"></TextView> <TextView android:id="@+id/ErrorText" android:text="@string/general_error" android:paddingRight="8dip" android:layout_gravity="center"></TextView> </TableRow> <TableRow> <TextView android:text="Amount here..." android:id="@+id/AmountNum" android:paddingRight="8dip" android:layout_gravity="center"></TextView> <TextView android:id="@+id/CardNum" android:text="Num here..." android:paddingRight="8dip" android:layout_gravity="center"></TextView> <TextView android:text="date here..." android:id="@+id/DateDate" android:paddingRight="8dip" android:layout_gravity="center"></TextView> <TextView android:text="Code here..." android:id="@+id/ErrorCode" android:paddingRight="8dip" android:layout_gravity="center"></TextView> </TableRow> <TableRow> <ImageView android:id="@+id/cc_image" android:src="@drawable/mastercard" android:background="@drawable/row_bg2" android:layout_gravity="center" android:layout_weight="1"></ImageView> <TextView android:id="@+id/ResponseText" android:layout_span="4" android:text="Response text here..." android:textSize="18dip" android:layout_weight="1"></TextView> </TableRow> <ImageView android:layout_gravity="center_vertical" android:background="@drawable/gradient_bg" android:layout_height="3dip" android:layout_width="fill_parent"></ImageView> </TableLayout>

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• android searchable not opening

  - by ng93

  Hi im trying to use a searchable activity in my application but when the search button is pressed nothing happens AndroidManifest.xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.test.test" android:versionCode="1" android:versionName="1.0.0" android:configChanges="keyboardHidden|orientation"> <uses-sdk android:minSdkVersion="7"/> <application android:icon="@drawable/icon" android:label="Test"> <activity android:name=".Test" android:label="Test" android:debuggable="true" android:theme="@android:style/Theme.NoTitleBar" android:launchMode="singleTask"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> <activity android:name=".Searchable"> <intent-filter> <action android:name="android.intent.action.SEARCH" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> <meta-data android:name="android.app.searchable" android:resource="@xml/searchable"/> </activity> <meta-data android:name="android.app.default_searchable" android:value=".Searchable"/> </application> </manifest> Searchable.xml (res/xml/searchable.xml) <?xml version="1.0" encoding="utf-8"?> <searchable xmlns:android="http://schemas.android.com/apk/res/android" android:label="Search" android:hint="Perform Search"> </searchable> Searchable.java (src/com/test/test/Searchable.java) package com.test.test; import android.app.Activity; import android.app.SearchManager; import android.content.Intent; import android.os.Bundle; public class Searchable extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); handleIntent(getIntent()); } @Override protected void onNewIntent(Intent intent) { setIntent(intent); handleIntent(intent); } private void handleIntent(Intent intent) { if (Intent.ACTION_SEARCH.equals(intent.getAction())) { String query = intent.getStringExtra(SearchManager.QUERY); } } } TIA, ng93

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• Scrollbars in ScrollView not showing after custom child view changes size

  - by Ted Hopp

  I have a ScrollView containing a client that is a vertical LinearLayout. The client, in turn, contains custom views that change height dynamically as a background thread does some work. The problem I'm having is that the ScrollView's vertical scroll bar is not updating correctly in Android 1.5. The most common problem occurs when the initial total height of the client is less than the viewport and grows. Initially there is no scroll bar, and it does not show up when the client grows until I actually scroll the window with a touch gesture or other UI action. After that, the scroll bar shows up. However, the thumb does not update as the height continues to change from the background thread. If I scroll the view again through the UI, the thumb immediately corrects itself. My code for updating the height from the background thread is: post(mLayoutRequestor); postInvalidate(); (mLayoutRequestor is a Runnable that just calls requestLayout().) This is done after I've recorded the new height in a variable mHeight. My onMeasure() method calls setMeasuredDimension with a height computed like this: private int measureHeight(int measureSpec) { int result; int specMode = MeasureSpec.getMode(measureSpec); int specSize = MeasureSpec.getSize(measureSpec); if (specMode == MeasureSpec.EXACTLY) { result = specSize; } else { result = mHeight; if (specMode == MeasureSpec.AT_MOST && result > specSize) result = specSize; } return result; } Am I supposed to be calling something else besides requestLayout() to get the scroll bar to update correctly?

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• How to change size of Android ScrollView

  - by user611923

  I have a layout like this (abstracted): Scrollview - fill_parent LinearLayout - wrap_content ImageView 1 - wrap_content ImageView 2 - ... ImageView 3 ... In the course of user interaction some images are replaced by larger or smaller ones, shortening or lenghtening the area to be scrolled. And that is the problem. The Scrollview (SV) does not know about the change, so either it scrolls over a lot of empty space at the bottom, or cuts off a picture or two at the bottom. Question 1: Can I somehow make the SV readapt to the changed hight of the LiearLayout (LL)? Question 2: I can obtain the current size through getHight on the LL. But supplyong it to the SV via changed LayoutParams does not work - of course, that would only change the height of the SV on the screen. Is there a way to put the changed height of the LL into the SV in the code, somehow? Question 3: I havn't tried it yet. Would creating the SV, LL and its children in code and then adding/removing children of changed size as required, make the SV adapt to the changes? And last question: Is there a better aüpproach, except using ListViews?

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• I can't understand this issue java.lang.IndexOutOfBoundsException.

  - by praveenb

  I've strange issue, that My application is working fine on some devices, But its crashing one of the client device(on Galaxy Nexus 4.1.1 v) at app starting screen. I get this stack trace from ACRA report. java.lang.IndexOutOfBoundsException at android.graphics.Paint.getTextRunAdvances(Paint.java:1731) at android.graphics.Paint.getTextRunAdvances(Paint.java:1704) at android.text.MeasuredText.addStyleRun(MeasuredText.java:164) at android.text.MeasuredText.addStyleRun(MeasuredText.java:204) at android.text.StaticLayout.generate(StaticLayout.java:281) at android.text.DynamicLayout.reflow(DynamicLayout.java:284) at android.text.DynamicLayout.(DynamicLayout.java:170) at android.widget.TextView.makeSingleLayout(TextView.java:5843) at android.widget.TextView.makeNewLayout(TextView.java:5741) at android.widget.TextView.onMeasure(TextView.java:6098) at android.view.View.measure(View.java:15172) at android.widget.LinearLayout.measureVertical(LinearLayout.java:833) at android.widget.LinearLayout.onMeasure(LinearLayout.java:574) at android.view.View.measure(View.java:15172) at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:617) at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:399) at android.view.View.measure(View.java:15172) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814) at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) at android.view.View.measure(View.java:15172) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390) at android.widget.LinearLayout.measureVertical(LinearLayout.java:681) at android.widget.LinearLayout.onMeasure(LinearLayout.java:574) at android.view.View.measure(View.java:15172) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814) at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2148) at android.view.View.measure(View.java:15172) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1848) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1100) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1273) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725) at android.view.Choreographer.doCallbacks(Choreographer.java:555) at android.view.Choreographer.doFrame(Choreographer.java:525) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711) at android.os.Handler.handleCallback(Handler.java:615) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4745) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) at dalvik.system.NativeStart.main(Native Method) Im seeing above stack trace. I'm unable to understand the issue. Please help me on tacking the issue. Thank you.

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• Newbie question: How do you layout an icon, 2 text lines and a button?

  - by Keith Barrows

  I am trying to extend a sample I found at http://developer.android.com/resources/articles/layout-tricks-efficiency.html. I am a brand new MonoDroid developer, just installed it yesterday, and trying to jump right into UI design and so far it is not clicking for me completely. I have this main.xml: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight" android:padding="6dip"> <ImageView android:id="@+id/icon" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_alignParentTop="true" android:layout_alignParentBottom="true" android:layout_marginRight="6dip" android:src="@drawable/icon" /> <TextView android:id="@+id/secondLine" android:layout_width="200dip" android:layout_height="26dip" android:layout_toRightOf="@id/icon" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:singleLine="true" android:ellipsize="marquee" android:text="Second line which is a long line of text and needs to scroll" /> <TextView android:id="@+id/firstLine" android:layout_width="200dip" android:layout_height="wrap_content" android:layout_toRightOf="@id/icon" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:layout_above="@id/secondLine" android:layout_alignWithParentIfMissing="true" android:singleLine="true" android:ellipsize="marquee" android:gravity="center_vertical" android:text="First line" /> <Button android:id="@+id/logonButton" android:layout_width="50dip" android:layout_height="wrap_content" android:layout_toRightOf="@id/secondLine" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:gravity="center_vertical" android:text="Login" /> /> </RelativeLayout> What I am trying to do is have an icon on the left, 2 lines of text stacked in the middle and a button on the right. When I run this in my emulator I am seeing: The second line is not scrolling. The button does not show up. Is there by any chance a simple WYSIWYG editor for layout? Or is there an app to give me a quick view of my layout XML? Something like FireBug in FireFox would be fine. Barring the slim chance there are UI helpers for Droid, what am I doing wrong? :)

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• My google map android app keeps crashing

  - by Manny264

  I have followed about two tutorials from vogella and some other tutorial that looked similar...very similar but to no avail. I load the app on my nexus 7 and it just crashes "Unfortunately MyMapView has stopped working" on launch.This is the manifest: ` <uses-sdk android:minSdkVersion="17" android:targetSdkVersion="17" /> <uses-feature android:glEsVersion="0x00020000" android:required="true"/> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <uses-library android:name="com.google.android.maps" /> <activity android:name="com.macmozart.mymapview.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="AIzaSyBZ1Bt7rjB863Jy-B05zls6k8XZsBGQ6-4" /> </application> ` Followed by my main layout: <fragment android:id="@+id/map" android:layout_width="match_parent" android:layout_height="match_parent" class="com.google.android.gms.maps.MapFragment" /> and finally my java class: package com.macmozart.mymapview; import android.app.Activity; import android.os.Bundle; import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.MapFragment; import com.google.android.gms.maps.model.BitmapDescriptorFactory; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.Marker; import com.google.android.gms.maps.model.MarkerOptions; import com.google.android.maps.*; public class MainActivity extends Activity { static final LatLng HAMBURG = new LatLng(53.558, 9.927); static final LatLng KIEL = new LatLng(53.551, 9.993); private GoogleMap map; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)) .getMap(); if (map != null) { Marker hamburg = map.addMarker(new MarkerOptions() .position(HAMBURG).title("Hamburg")); Marker kiel = map.addMarker(new MarkerOptions() .position(KIEL) .title("Kiel") .snippet("Kiel is cool") .icon(BitmapDescriptorFactory .fromResource(R.drawable.ic_launcher))); map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15)); // Zoom in, animating the camera. map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null); } } } Any idea what im doing wrong I really need this to work

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• Unable to Start Activity ComponentInfo when Starting a New Activity

  - by Timtim17

  {I know there's already a whole bunch of questions like this, but I can't see any problems that related to my program.} I have an Android App that is supposed to take a name from a EditText and put it in a TextView in another activity. It previously worked, but then I wanted it to start another activity if the EditText's value was equal to "ANDROID". However, now the app crashes whenever I try to start either activity. First Activity: package net.timtim17.dev.android.fun.nametag; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final EditText et = (EditText) findViewById(R.id.editText1); Button submit = (Button) findViewById(R.id.button1); submit.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { String text = et.getText().toString(); if(text.equals("ANDROID")){ Intent android = new Intent(MainActivity.this, AndroidNameTag.class); startActivity(android); }else{ Intent intent = new Intent(MainActivity.this, NameTag.class); intent.putExtra("name", text); startActivity(intent); } } }); } } NameTag Activity: package net.timtim17.dev.android.fun.nametag; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class NameTag extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_tag); TextView tv = (TextView) findViewById(R.id.textView2); tv.setText(getIntent().getExtras().getString("name")); } } AndroidNameTag Activity: package net.timtim17.dev.android.fun.nametag; import android.app.Activity; import android.graphics.drawable.AnimationDrawable; import android.os.Bundle; import android.widget.ImageView; public class AndroidNameTag extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_android); ImageView iv = (ImageView) findViewById(R.id.imageView1); iv.setBackgroundResource(R.anim.animation); AnimationDrawable anim = (AnimationDrawable) iv.getBackground(); anim.start(); } } LogCat Error: 10-26 11:26:35.602: E/AndroidRuntime(2900): FATAL EXCEPTION: main 10-26 11:26:35.602: E/AndroidRuntime(2900): java.lang.RuntimeException: Unable to start activity ComponentInfo{net.timtim17.dev.android.fun.nametag/net.timtim17.dev.android.fun.nametag.NameTag}: java.lang.NullPointerException 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.ActivityThread.access$600(ActivityThread.java:141) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.os.Handler.dispatchMessage(Handler.java:99) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.os.Looper.loop(Looper.java:137) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.ActivityThread.main(ActivityThread.java:5103) 10-26 11:26:35.602: E/AndroidRuntime(2900): at java.lang.reflect.Method.invokeNative(Native Method) 10-26 11:26:35.602: E/AndroidRuntime(2900): at java.lang.reflect.Method.invoke(Method.java:525) 10-26 11:26:35.602: E/AndroidRuntime(2900): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 10-26 11:26:35.602: E/AndroidRuntime(2900): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 10-26 11:26:35.602: E/AndroidRuntime(2900): at dalvik.system.NativeStart.main(Native Method) 10-26 11:26:35.602: E/AndroidRuntime(2900): Caused by: java.lang.NullPointerException 10-26 11:26:35.602: E/AndroidRuntime(2900): at net.timtim17.dev.android.fun.nametag.NameTag.onCreate(NameTag.java:15) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.Activity.performCreate(Activity.java:5133) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 10-26 11:26:35.602: E/AndroidRuntime(2900): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 10-26 11:26:35.602: E/AndroidRuntime(2900): ... 11 more MainActivity Layout: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginTop="16dp" android:text="@string/main_text" android:textAppearance="?android:attr/textAppearanceMedium" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/textView1" android:layout_below="@+id/textView1" android:layout_marginTop="14dp" android:text="@string/submit_button" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_alignTop="@+id/button1" android:ems="10" android:inputType="textPersonName" > <requestFocus /> </EditText>

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• Android: Adding extended GLSurfaceView to a Layout don't show 3d stuff

  - by Santiago

  I make a game extending the class GLSurfaceView, if I apply SetContentView directly to that class, the 3d stuff and input works great. Now I want to show some items over 3d stuff, so I create a XML with a layout and some objects, and I try to add my class manually to the layout. I'm not getting errors but the 3d stuff is not shown but I can view the objects from XML layout. source: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE); layout = (RelativeLayout) inflater.inflate(R.layout.testlayout, null); //Create an Instance with this Activity my3dstuff = new myGLSurfaceViewClass(this); layout.addView(my3dstuff,4); setContentView(R.layout.testlayout); } And testlayout have: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/Pantalla"> <ImageView android:id="@+id/zoom_less" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/zoom_less"></ImageView> <ImageView android:id="@+id/zoom_more" android:layout_width="wrap_content" android:src="@drawable/zoom_more" android:layout_height="wrap_content" android:layout_alignParentRight="true"></ImageView> <ImageView android:id="@+id/zoom_normal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/zoom_normal" android:layout_centerHorizontal="true"></ImageView> <ImageView android:id="@+id/stop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/stop" android:layout_centerInParent="true" android:layout_alignParentBottom="true"></ImageView> </RelativeLayout> I also tried to add my class to XML but the Activity hangs up. <com.mygame.myGLSurfaceViewClass android:id="@+id/my3dstuff" android:layout_width="fill_parent" android:layout_height="fill_parent"></com.mygame.myGLSurfaceViewClass> and this don't works: <View class="com.mygame.myGLSurfaceViewClass" android:id="@+id/my3dstuff" android:layout_width="fill_parent" android:layout_height="fill_parent"></View> Any Idea? Thanks

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