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• eclipse adt 17 and the libs folder

  - by max4ever

  Ok so i update to eclipse adt to version 17 and I get this error 04-05 12:28:55.810: E/AndroidRuntime(5470): FATAL EXCEPTION: main 04-05 12:28:55.810: E/AndroidRuntime(5470): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.galeola.agentis/com.galeola.agentis.activity.GestionaleActivity}: java.lang.ClassNotFoundException: com.galeola.agentis.activity.GestionaleActivity in loader dalvik.system.PathClassLoader[/system/framework/com.google.android.maps.jar:/data/app/com.galeola.agentis-1.apk] 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1742) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1834) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.app.ActivityThread.access$500(ActivityThread.java:122) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1027) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.os.Handler.dispatchMessage(Handler.java:99) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.os.Looper.loop(Looper.java:132) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.app.ActivityThread.main(ActivityThread.java:4126) 04-05 12:28:55.810: E/AndroidRuntime(5470): at java.lang.reflect.Method.invokeNative(Native Method) 04-05 12:28:55.810: E/AndroidRuntime(5470): at java.lang.reflect.Method.invoke(Method.java:491) 04-05 12:28:55.810: E/AndroidRuntime(5470): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844) 04-05 12:28:55.810: E/AndroidRuntime(5470): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602) 04-05 12:28:55.810: E/AndroidRuntime(5470): at dalvik.system.NativeStart.main(Native Method) 04-05 12:28:55.810: E/AndroidRuntime(5470): Caused by: java.lang.ClassNotFoundException: com.galeola.agentis.activity.GestionaleActivity in loader dalvik.system.PathClassLoader[/system/framework/com.google.android.maps.jar:/data/app/com.galeola.agentis-1.apk] 04-05 12:28:55.810: E/AndroidRuntime(5470): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:251) 04-05 12:28:55.810: E/AndroidRuntime(5470): at java.lang.ClassLoader.loadClass(ClassLoader.java:540) 04-05 12:28:55.810: E/AndroidRuntime(5470): at java.lang.ClassLoader.loadClass(ClassLoader.java:500) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.app.Instrumentation.newActivity(Instrumentation.java:1022) 04-05 12:28:55.810: E/AndroidRuntime(5470): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1733) 04-05 12:28:55.810: E/AndroidRuntime(5470): ... 11 more however if i move my libraries to /libs i can start the applications, but with the libraries in /libs javadoc and javasources stops working, while if they are not in /libs javadoc and javasource works, so I don't understand why.

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• Problem saving file on Motorola Droid, Android 2.1?

  - by Rob Kent

  Two of my users have reported a problem with my Android application, OftSeen Gestures. Both of them are using a Motorola Droid. The app saves a text file which is just a list of gesture names and phone numbers, both strings. It saves the file to the private data area. I don't know that it is this code that is failing but they report the assigned numbers disappearing after the phone comes out of screen sleep. Since the file is reread in OnCreate each time, I'm assuming the file doesn't exist on return. As soon as I can get my hands on a Droid I will debug it but in the meantime can you see a reason why this save operation would fail on Droid (no other users have reported this)? OutputStreamWriter out = new OutputStreamWriter(AppGlobal.getContext().openFileOutput(MAPPINGS_FILE_NAME, 0)); for (String key : mMap.keySet()) { String number = mMap.get(key).number; out.write(String.format("%s,%s\n", key, number == null ? "" : number)); } out.close(); AppGlobal.getContext returns the application context and the MAPPINGS_FILE_NAME resolves to "gesture_mappings.txt". Like I say, I don't know that this is the problem. It could be something else to do with state management inside the app. If anyone has a Droid, maybe they could download the app from Market and test it for me? Note this is a genuine request for help - not an attempt to increase my downloads.

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• how to fix error in bitmap size exceeds VM budget

  - by narasimha

  hi folks i am working one application image uploading to sdcard i am scaling that sdcard saved into database some times one error is occurs bitmap size exceeds vm budget ouput : 01-11 15:39:51.809: ERROR/AndroidRuntime(6214): Uncaught handler: thread main exiting due to uncaught exception 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): java.lang.OutOfMemoryError: bitmap size exceeds VM budget 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.graphics.BitmapFactory.nativeDecodeByteArray(Native Method) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:384) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:397) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at com.fitzgeraldsoftware.shout.presentationLayer.Shout.onActivityResult(Shout.java:1653) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.app.Activity.dispatchActivityResult(Activity.java:3624) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.app.ActivityThread.deliverResults(ActivityThread.java:3220) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3266) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.app.ActivityThread.access$2600(ActivityThread.java:116) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1823) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.os.Handler.dispatchMessage(Handler.java:99) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.os.Looper.loop(Looper.java:123) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at android.app.ActivityThread.main(ActivityThread.java:4203) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at java.lang.reflect.Method.invokeNative(Native Method) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at java.lang.reflect.Method.invoke(Method.java:521) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549) 01-11 15:39:51.979: ERROR/AndroidRuntime(6214): at dalvik.system.NativeStart.main(Native Method) how can fix the error please forward some solution thanks in advance

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• Starting an Intent to Launch an app to Background in Android

  - by Tista

  Hi all, I'm using Wikitude API 1.1 as an AR viewer in my application. The problem with Wikitude, if I haven't launched the actual Wikitude application since the phone's bootup, I will get a NullPointerException everytime I start my own application. So I figure if I can start my app first and them check if Wikitude is installed and or running. If it's not installed, go to market n download. If it's not running, then we should run it straight to background so that my app doesn't loose its focus. // Workaround for Wikitude this.WIKITUDE_PACKAGE_NAME = "com.wikitude"; PackageManager pacMan = Poligamy.this.getPackageManager(); try { PackageInfo pacInfo = pacMan.getPackageInfo(this.WIKITUDE_PACKAGE_NAME, pacMan.GET_SERVICES); Log.i("CheckWKTD", "Wikitude is Installed"); ActivityManager aMan = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE); List<RunningAppProcessInfo> runningApps = aMan.getRunningAppProcesses(); int numberOfApps = runningApps.size(); for(int i=0; i<numberOfApps; i++) { if(runningApps.get(i).processName.equals(this.WIKITUDE_PACKAGE_NAME)) { this.WIKITUDE_RUNNING = 1; Log.i("CheckWKTD", "Wikitude is Running"); } } if(this.WIKITUDE_RUNNING == 0) { Log.i("CheckWKTD", "Wikitude is NOT Running"); /*final Intent wIntent = new Intent(Intent.ACTION_MAIN, null); wIntent.addCategory(Intent.CATEGORY_LAUNCHER); final ComponentName cn = new ComponentName("com.wikitude", "com.mobilizy.wikitudepremium.initial.Splash"); wIntent.setComponent(cn); wIntent.setFlags(Intent.FLAG_ACTIVITY_NO_USER_ACTION); startActivityIfNeeded(wIntent, 0);*/ } } catch (NameNotFoundException e) { // TODO Auto-generated catch block Log.i("CheckWKTD", "Wikitude is NOT Installed"); e.printStackTrace(); //finish(); } The part I block commented is the intent to start Wikitude. But I always failed in restricting Wikitude to background. Any help? Thanks before. Best, Tista

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• AudioRecord problems with non-HTC devices

  - by Marc

  I'm having troubles using AudioRecord. An example using some of the code derived from the splmeter project: private static final int FREQUENCY = 8000; private static final int CHANNEL = AudioFormat.CHANNEL_CONFIGURATION_MONO; private static final int ENCODING = AudioFormat.ENCODING_PCM_16BIT; private int BUFFSIZE = 50; private AudioRecord recordInstance = null; ... android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO); recordInstance = new AudioRecord(MediaRecorder.AudioSource.MIC, FREQUENCY, CHANNEL, ENCODING, 8000); recordInstance.startRecording(); short[] tempBuffer = new short[BUFFSIZE]; int retval = 0; while (this.isRunning) { for (int i = 0; i < BUFFSIZE - 1; i++) { tempBuffer[i] = 0; } retval = recordInstance.read(tempBuffer, 0, BUFFSIZE); ... // process the data } This works on the HTC Dream and the HTC Magic perfectly without any log warnings/errors, but causes problems on the emulators and Nexus One device. On the Nexus one, it simply never returns useful data. I cannot provide any other useful information as I'm having a remote friend do the testing. On the emulators (Android 1.5, 2.1 and 2.2), I get weird errors from the AudioFlinger and Buffer overflows with the AudioRecordThread. I also get a major slowdown in UI responsiveness (even though the recording takes place in a separate thread than the UI). Is there something apparent that I'm doing incorrectly? Do I have to do anything special for the Nexus One hardware?

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• Why is my searchable activity's Intent.getAction() null?

  - by originalbryan

  I've followed the SearchManager documentation yet am still having trouble making one of my app's activities searchable. From my activity, the SearchDialog appears, I enter a query, hit search, my activity reopens, then I see this in the log: D/SearchDialog( 584): launching Intent { act=android.intent.action.SEARCH flg=0x10000000 cmp=com.clinkybot.geodroid2/.views.Waypoints (has extras) } I/SearchDialog( 584): Starting (as ourselves) #Intent;action=android.intent.action.SEARCH;launchFlags=0x10000000;component=com.clinkybot.geodroid2/.views.Waypoints;S.user_query=sdaf;S.query=sdaf;end I/ActivityManager( 584): Starting activity: Intent { act=android.intent.action.SEARCH flg=0x10000000 cmp=com.clinkybot.geodroid2/.views.Waypoints (has extras) } D/WAYPOINTS( 1018): NI Intent { cmp=com.clinkybot.geodroid2/.views.Waypoints (has extras) } D/WAYPOINTS( 1018): NI null D/WAYPOINTS( 1018): NI false It appears to me that everything is fine up until the last three lines. The "NI" lines are getIntent().toString(), getIntent().getAction(), and getIntent().hasExtra(SearchManager.QUERY) respectively. ActivityManager appears to be starting my activity with the correct action. Then when my activity starts, it contains no action!? What am I doing wrong? The relevant portion of my manifest is: <activity android:name=".views.Waypoints" android:label="Waypoints" android:launchMode="singleTop"> <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>

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• How do I start a service which is defined in a different package?

  - by Brad Hein

  I have two apps, one runs in namespace com.gtosoft.voyager and the other is com.gtosoft.dash. From com.gtosoft.dash I would like to start up the service which is defined in com.gtosoft.voyager... I think I need an intent, but what arg(s) would I pass to the intent before kicking it off with startService()? If they were in the same package I could just use Intent svc=new Intent (SettingsActivity.this,VoyagerService.class); startService(svc); Snippet of Manifest which defines the service <application android:icon="@drawable/voyagercarlogo" android:label="@string/app_name" android:debuggable="false"> <provider android:name="com.gtosoft.voyager.VoyagerCProvider" android:authorities="com.gtosoft.voyager"/> <service android:name=".VoyagerService"/> <activity android:name=".SettingsActivity" android:label="Voyager" android:configChanges="keyboardHidden|orientation"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity>

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• ListView and wrap_content

  - by gaiapac

  I want to create an activity with a ListView on the left and a TextView on the right, side by side. I write the following xml, but the ListView occupies the entire page and it don't worry about the wrap_content. Why? How can I resolve it? <LinearLayout 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:orientation="horizontal" > <ListView android:id="@+id/lv" android:layout_width="wrap_content" android:layout_height="match_parent" /> <TextView android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="match_parent" /> </LinearLayout> EDIT: my onCreate @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ListView lv = (ListView) findViewById(R.id.lv); String[] values = new String[] { "Test1", "Test2", "Test3", "Test4" }; ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.left, R.id.tv1, values); lv.setAdapter(adapter); }

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• How to limit EditText lines to 1 by coding (ignoring enter)?

  - by Vahe Musinyan

  I am trying to ignore the enter key, but i do not want to use onKeyDown() function. There is a way to do this in xml: 1. android:maxLines = "1" 2. android:lines = "1" 3. android:singleLine = "true" I actually want to do the last one by coding. Does anyone know how to do that? for (int i=0; i<numClass; i++) { temp_ll = new LinearLayout(this); temp_ll.setOrientation(LinearLayout.HORIZONTAL); temp1 = new EditText(this); InputFilter[] FilterArray = new InputFilter[1]; FilterArray[0] = new InputFilter.LengthFilter(12); temp1.setFilters(FilterArray); // set edit text length to max 12 temp1.setHint(" class name "); temp1.setSingleLine(true); temp_ll.addView(temp1); frame.addView(temp_ll); } ll.addView(frame);

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• Android Webview Anchor Link (Jump link) not working

  - by Joel

  Hi, I have a WebView in my Android App that is loading an HTML string using the loadDataWithBaseURL() method. The problem is that local anchor links (<a href="#link">...) are not working correctly. When the link is clicked, it becomes highlighted, but does not scroll to the corresponding anchor. This also does not work if I use the WebView's loadUrl() method to load a page that contains anchor links. However, if I load the same URL in the browser, the anchor links do work. Is there any special handling required to get these to work for a WebView? I am using API v4 (1.6).

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• Maintain cookie session in Android

  - by datguywhowanders

  Okay, I have an android application that has a form in it, two EditText, a spinner, and a login button. The user selects the service from the spinner, types in their user name and password, and clicks login. The data is sent via POST, a response is returned, it's handled, a new webview is launched, the html string generated form the response is loaded, and I have the home page of whatever service the user selected. That's all well and good. Now, when the user clicks on a link, the login info can't be found, and the page asks the user to login again. My login session is being dropped somewhere, and I'm not certain how to pass the info from the class that controls the main part of my app to the class that just launches the webview activity. The on click handler from the form login button: private class FormOnClickListener implements View.OnClickListener { public void onClick(View v) { String actionURL, user, pwd, user_field, pwd_field; actionURL = "thePageURL"; user_field = "username"; //this changes based on selections in a spinner pwd_field = "password"; //this changes based on selections in a spinner user = "theUserLogin"; pwd = "theUserPassword"; List<NameValuePair> myList = new ArrayList<NameValuePair>(); myList.add(new BasicNameValuePair(user_field, user)); myList.add(new BasicNameValuePair(pwd_field, pwd)); HttpParams params = new BasicHttpParams(); DefaultHttpClient client = new DefaultHttpClient(params); HttpPost post = new HttpPost(actionURL); HttpResponse response = null; BasicResponseHandler myHandler = new BasicResponseHandler(); String endResult = null; try { post.setEntity(new UrlEncodedFormEntity(myList)); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } try { response = client.execute(post); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } try { endResult = myHandler.handleResponse(response); } catch (HttpResponseException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } List cookies = client.getCookieStore().getCookies(); if (!cookies.isEmpty()) { for (int i = 0; i < cookies.size(); i++) { cookie = cookies.get(i); } } Intent myWebViewIntent = new Intent(MsidePortal.this, MyWebView.class); myWebViewIntent.putExtra("htmlString", endResult); myWebViewIntent.putExtra("actionURL", actionURL); startActivity(myWebViewIntent); } } And here is the webview class that handles the response display: public class MyWebView extends android.app.Activity{ private class MyWebViewClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true; } } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.web); MyWebViewClient myClient = new MyWebViewClient(); WebView webview = (WebView)findViewById(R.id.mainwebview); webview.getSettings().setBuiltInZoomControls(true); webview.getSettings().setJavaScriptEnabled(true); webview.setWebViewClient(myClient); Bundle extras = getIntent().getExtras(); if(extras != null) { // Get endResult String htmlString = extras.getString("htmlString"); String actionURL = extras.getString("actionURL"); Cookie sessionCookie = MsidePortal.cookie; CookieSyncManager.createInstance(this); CookieManager cookieManager = CookieManager.getInstance(); if (sessionCookie != null) { cookieManager.removeSessionCookie(); String cookieString = sessionCookie.getName() + "=" + sessionCookie.getValue() + "; domain=" + sessionCookie.getDomain(); cookieManager.setCookie(actionURL, cookieString); CookieSyncManager.getInstance().sync(); } webview.loadDataWithBaseURL(actionURL, htmlString, "text/html", "utf-8", actionURL); } } } I've had mixed success implementing that cookie solution. It seems to work for one service I log into that I know keeps the cookies on the server (old, archaic, but it works and they don't want to change it.) The service I'm attempting now requires the user to keep cookies on their local machine, and it does not work with this setup. Any suggestions?

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• Decoding AAC using MediaCodec API on Android

  - by Benjamin Reed

  I'm trying to used the MediaCodec API on Android to decode an AAC stream. (It's raw AAC.) I tried using the MediaFormat.createAudioFormat() to create the format object to pass to MediaCodec.configure(), but I kept getting errors when using AAC (audio/mp4a-latm). (It works with MP3 (audio/mpeg) though...) Finally I created a MediaExtractor for an AAC file and looked at the format object it was producing. I saw that it included the key "csd-0" for a ByteBuffer composed of two bytes both with the value 0x12. If I include that key and value in the format object that I used to configure the AAC codec, everything works. Does anyone have an idea what is going on? The documentation states that I shouldn't configure that key. Does anyone have a pointer to MediaCodec examples to decode AAC files without using MediaExtractor to generate the format object?

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• WebView and Cookies on Android

  - by dave smith

  I have an application on appspot that works fine through regular browser, however when used through Android WebView, it cannot set and read cookies. I am not trying to get cookies "outside" this web application BTW, once the URL is visited by WebView, all processing, ids, etc. can stay there, all I need is session management inside that application. First screen also loads fine, so I know WebView + server interactivity is not broken. I looked at WebSettings class, there was no call like setEnableCookies. I load url like this: public class MyActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); WebView webview = new WebView(this); setContentView(webview); webview.loadUrl([MY URL]); } .. } Any ideas?

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• Android ListView: get data index of visible item

  - by Mayra

  I have an Android ListView created with a SimpleAdapter that has more items in it than fit in the screen. After the list has been scrolled, I need to get the position in the data model of the first visible item in the list. Basically I want a function like: listView.getChildAt(0).getPositionInDataModel(). Adapter has a few functions in it, like getItemId(position) that looked useful; however, the SimpleAdapter implementation just returns the passed in position, not a row id like I'd hoped. A brute force solution would be to get the View at index 0, and compare it to the view for each item in the adapter. However, there doesn't seem to be an easy way to get the view for a particular position from the adapter. Anyone have any thoughts?

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• Using External GPS Device w/ Android via Bluetooth

  - by jeremynealbrown

  Hello, I am writing an Android 2.0 application that is going to be used in a somewhat remote location. There will be no internet connection available and it will be used outside of the U.S. I am considering the option of using an external Nokia or similar GPS device as a receiver/transmitter and connecting to it for use in my application via the bluetooth API. I am looking for opinions on whether or not this is even possible, if anyone has attempted it or if someone has a suggestion for some other external device or approach that would be more fitting. Link to possible external GPS device: http://europe.nokia.com/find-products/accessories/all-accessories/navigation/gps-modules/nokia-gps-module-ld-3w Thanks in advance...

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• android imageview onClickListener animation

  - by Javadid

  hi. I guess this is kind of a idiotic question but i have tried setting onClicklistener on an ImageView and it has worked. But the problem is that the user cannot sense the click. I mean if some of u have worked on other mobile environs(like apple iphone) then wen we click on a Image in other environs then it gives an effect on the image so that the user can understand that the image has been clicked. I have tried setting alpha using "setalpha" method but it doesnt work. Though the same thing is working fine on onFocusListener implementation. Can some1 suggest a different way to modify the image on click... I am new to android so havent learnt the nuances of simple animation also... if there is any simple animation i can use for the same then plzz plzzz let me know... Thanx...

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• Android ListView scrolling to top

  - by aandroid

  Hi, I have a ListView with custom rows. When any of these rows is clicked, the ListView's data is regenerated. I'd like the list to scroll back to the top when this happens. I initially tried using setSelection(0) in each row's OnClickListener to achieve this but was unsuccessful (I believe because the ListView loses its scroll position when its data is invalidated - so my call to setSelection is undone. I still don't understand how the ListView decides where to scroll to after invalidation, though). The only working solution I know of was given by Romain Guy here: http://groups.google.com/group/android-developers/browse_thread/thread/127ca57414035301 It involves (View.post)ing the call to _listView.setSelection(0). I found this to perform quite poorly. The newly generated list shows up with it's scroll location unchanged and there is a considerable delay before it scrolls back to the top. Is there any better way to achieve this functionality? Any help would be much appreciated. Thanks!

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• [OpenGL ES - Android] Better way to generate tiles

  - by Inoe

  Hi ! I'll start by saying that i'm REALLY new to OpenGL ES (I started yesterday =), but I do have some Java and other languages experience. I've looked a lot of tutorials, of course Nehe's ones and my work is mainly based on that. As a test, I started creating a "tile generator" in order to create a small Zelda-like game (just moving a dude in a textured square would be awsome :p). So far, I have achieved a working tile generator, I define a char map[][] array to store wich tile is on : private char[][] map = { {0, 0, 20, 11, 11, 11, 11, 4, 0, 0}, {0, 20, 16, 12, 12, 12, 12, 7, 4, 0}, {20, 16, 17, 13, 13, 13, 13, 9, 7, 4}, {21, 24, 18, 14, 14, 14, 14, 8, 5, 1}, {21, 22, 25, 15, 15, 15, 15, 6, 2, 1}, {21, 22, 23, 0, 0, 0, 0, 3, 2, 1}, {21, 22, 23, 0, 0, 0, 0, 3, 2, 1}, {26, 0, 0, 0, 0, 0, 0, 3, 2, 1}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 1}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 1} }; It's working but I'm no happy with it, I'm sure there is a beter way to do those things : 1) Loading Textures : I create an ugly looking array containing the tiles I want to use on that map : private int[] textures = { R.drawable.herbe, //0 R.drawable.murdroite_haut, //1 R.drawable.murdroite_milieu, //2 R.drawable.murdroite_bas, //3 R.drawable.angledroitehaut_haut, //4 R.drawable.angledroitehaut_milieu, //5 }; (I cutted this on purpose, I currently load 27 tiles) All of theses are stored in the drawable folder, each one is a 16*16 tile. I then use this array to generate the textures and store them in a HashMap for a later use : int[] tmp_tex = new int[textures.length]; gl.glGenTextures(textures.length, tmp_tex, 0); texturesgen = tmp_tex; //Store the generated names in texturesgen for(int i=0; i < textures.length; i++) { //Bitmap bmp = BitmapFactory.decodeResource(context.getResources(), textures[i]); InputStream is = context.getResources().openRawResource(textures[i]); Bitmap bitmap = null; try { //BitmapFactory is an Android graphics utility for images bitmap = BitmapFactory.decodeStream(is); } finally { //Always clear and close try { is.close(); is = null; } catch (IOException e) { } } // Get a new texture name // Load it up this.textureMap.put(new Integer(textures[i]),new Integer(i)); int tex = tmp_tex[i]; gl.glBindTexture(GL10.GL_TEXTURE_2D, tex); //Create Nearest Filtered Texture gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); //Different possible texture parameters, e.g. GL10.GL_CLAMP_TO_EDGE gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_REPEAT); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_REPEAT); //Use the Android GLUtils to specify a two-dimensional texture image from our bitmap GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0); bitmap.recycle(); } I'm quite sure there is a better way to handle that... I just was unable to figure it. If someone has an idea, i'm all ears. 2) Drawing the tiles What I did was create a single square and a single texture map : /** The initial vertex definition */ private float vertices[] = { -1.0f, -1.0f, 0.0f, //Bottom Left 1.0f, -1.0f, 0.0f, //Bottom Right -1.0f, 1.0f, 0.0f, //Top Left 1.0f, 1.0f, 0.0f //Top Right }; private float texture[] = { //Mapping coordinates for the vertices 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f }; Then, in my draw function, I loop through the map to define the texture to use (after pointing to and enabling the buffers) : for(int y = 0; y < Y; y++){ for(int x = 0; x < X; x++){ tile = map[y][x]; try { //Get the texture from the HashMap int textureid = ((Integer) this.textureMap.get(new Integer(textures[tile]))).intValue(); gl.glBindTexture(GL10.GL_TEXTURE_2D, this.texturesgen[textureid]); } catch(Exception e) { return; } //Draw the vertices as triangle strip gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, vertices.length / 3); gl.glTranslatef(2.0f, 0.0f, 0.0f); //A square takes 2x so I move +2x before drawing the next tile } gl.glTranslatef(-(float)(2*X), -2.0f, 0.0f); //Go back to the begining of the map X-wise and move 2y down before drawing the next line } This works great by I really think that on a 1000*1000 or more map, it will be lagging as hell (as a reminder, this is a typical Zelda world map : http://vgmaps.com/Atlas/SuperNES/LegendOfZelda-ALinkToThePast-LightWorld.png ). I've read things about Vertex Buffer Object and DisplayList but I couldn't find a good tutorial and nodoby seems to be OK on wich one is the best / has the better support (T1 and Nexus One are ages away). I think that's it, I've putted a lot of code but I think it helps. Thanks in advance !

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• Android -- Linkify and ListView

  - by Ryan

  Is there any way to Linkify a specific TextView that is contained within a ListView? I tried using android:autoLink="all" but that didn't work. I was getting an out of context error. Important also to note: the ListView is my second view in the ViewFlipper. I have also tried: TextView infoText = (TextView) findViewById(R.id.rowText2); Linkify.addLinks(infoText, Linkify.ALL); Right after the adapter was bound to the ListView and the View was switched. No luck. Any Ideas? Thanks in advance!!!

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• Using Simple XML and getting NoClassDefFoundError in Android

  - by Berat Onur Ersen

  I'm trying to use Simple XML to convert my java objects to XML format in my Android application. I'm getting NoClassDefFoundError at line Serializer serializer = new Persister(); java.lang.NoClassDefFoundError: org.simpleframework.xml.core.Persister I have simple-xml-2.6.1.jar in project class path and when I got NoClassDefFoundError I also put these 3 jars in classpath stax-1.2.0.jar stax-api-1.0.1.jar xpp3-1.1.3_8.jar but made no use. Still having NoClassDefFoundError. Any kind of help will be appreciated.Thank you.

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• How to launch android email setup screen programmatically from my activity

  - by ganesh

  hi, I could send mail from my Activity when i have already configured with any email account in android ,but in case if have not configured ,is there any way to launch email setup screen from my Activity ,or at least check whether email account is setup before sending a email. If i haven't set up my email account then the following code takes me to compose SMS/MMS,which i don't want ,Please give your suggestion. Intent emailIntent = new Intent(Intent.ACTION_SEND); emailIntent.putExtra(Intent.EXTRA_EMAIL, "xxx.com"); emailIntent.putExtra(Intent.EXTRA_SUBJECT, "..."); emailIntent.putExtra(Intent.EXTRA_TEXT,"..."); emailIntent.setType("text/plain"); startActivity(Intent.createChooser(emailIntent, "Send mail..."));

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• android memory management outside heap

  - by Daniel Benedykt

  Hi I am working on an application for android and we since we have lots of graphics, we use a lot of memory. I monitor the memory heap size and its about 3-4 Mb , and peeks of 5Mb when I do something that requires more memory (and then goes back to 3). This is not a big deal, but some other stuff is handled outside the heap memory, like loading of drawables. For example if I run the ddms tool outside eclipse, and go to sysinfo, I see that my app is taking 20Mb on the Droid and 12 on the G1, but heap size are the same in both, because data is the same but images are different. So the questions are: How do I know what is taking the memory outside the heap memory? What other stuff takes memory outside the heap memory? Complex layouts (big tree) ? Animations? Thanks Daniel

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• Android Camera in Portrait on SurfaceView

  - by Prasanna

  Hello, I tried several things to try to get the camera preview to show up in portrait on a SurfaceView. Nothing worked. I am testing on a Droid that has 2.0.1. I tried: 1) forcing the layout to be portrait by: this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); 2) using Camera.Parameters parameters = camera.getParameters(); parameters.set("orientation", "portrait"); parameters.setRotation(90); camera.setParameters(parameters); Is there something else I can try? If this a bug in Android or the phone how can I make sure that this is the case so that I have proof to inform the client? Thanks, Prasanna

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• Render string to texture in Android and OpenGL ES

  - by Eddie Ringle

  I've googled around everywhere, but cannot find much for rendering strings to textures and then displaying that texture on a quad on the screen. Can someone provide a run-down on the process or provide good resources that describe how? Is rendering strings to textures even the best method for displaying text in an Android OpenGL ES app? EDIT: Okay, so LabelMaker interferes with alpha blending, the texture (created from a PNG with a transparent background) now has a solid black background, rather than a transparent background. If I comment out all the LabelMaker-related code, it works fine.

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• Parsing RSS2.0 feeds using Pull Parser on Android

  - by Samuh

  I am trying to parse a RSS2.0 feed, obtained from a remote server, on my Android device using XML Pull Parser. // get a parser instance and set input,encoding XmlPullParser parser = Xml.newPullParser(); parser.setInput(getInputStream(), null); I am getting invalid token exceptions: Error parsing document. (position:line -1, column -1) caused by: org.apache.harmony.xml.ExpatParser$ParseException: At line 158, column 25: not well-formed (invalid token) Strangely, when I download the feed XML on the device, bundle it inside the raw folder and then run the same code. Everything works fine. What could be the problem here? How do I validate the XML before I parse it on device? Thanks.

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