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  • Is deep Java knowledge needed for Android?

    - by MigNix
    Hi, I am C++ developer interested in Android. As I understand the only possibility to develop applications for Android is Java. There is NDK also, but as I can see it is just something like JNI for Java. Is it mandatory to learn Java or to have deep knowledge in Java then try Android SDK, or it would be possible to learn Java while developing for Android. Thank you.

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  • HTG Explains: Just How Bad Are Android Tablet Apps?

    - by Chris Hoffman
    Apple loves to criticize the state of Android tablet apps when pushing its own iPad tablets. But just how bad is the Android tablet app situation? Should you avoid Android tablets like the Nexus 7 because of the apps? It’s clear that Apple’s iPad is way ahead when it comes to the sheer quantity of tablet-optimized apps. It’s also clear that some popular apps — particularly touch-optimized games — only show up on iPad. But that’s not the whole story. The Basics First, let’s get an idea of the basic stuff that will work well for you on Android. An excellent web browser. Chrome has struggled with performance on Android, but hits its stride on the Nexus 7 (2013). Great, tablet-optimized apps for all of Google’s services, from YouTube to Gmail and Google Maps. Everything you need for reading, from Amazon’s Kindle app for eBooks, Flipboard and Feedly for new articles from websites, and other services like the popular Pocket read-it-later service. Apps for most popular media services, from Netflix, Hulu, and YouTube for videos to Pandora, Spotify, and Rdio for music. A few things aren’t available — you won’t find Apple’s iTunes and Amazon still doesn’t offer an Amazon Instant Video app for Android, while they do for iPad and even their own Android-based Kindle Fire devices. Android has very good app coverage when it comes to consuming content, whether you’re reading websites and ebooks or watching videos and listening to music. You can play almost any Android smartphone game, too. For content consumption, Android is better than something like Windows 8, which lacks apps for Google services like YouTube and still doesn’t have apps for popular media services like Spotify and Rdio. How Android Scales Smartphone Apps Let’s look at how Android scales smartphone apps. Now, bear with us here — we know “scaling” is a dirty word considering how poorly Apple’s iPad scales iPhone apps, but it’s not as bad on Android. When an iPad runs an iPhone app, it simply doubles the pixels and effectively zooms in. For example, if you had  Twitter app with five tweets visible at once on an iPhone and ran the same app on an iPad, the iPad would simply “zoom in” and enlarge the same screen — you’d still see five tweets, but each tweet would appear larger. This is why developers create optimized iPad apps with their own interfaces. It’s especially important on Apple’s iOS. Android devices come in all shapes and sizes, so Android apps have a smarter, more intelligent way to adapt to different screen sizes. Let’s say you have a Twitter app designed for smartphones and it only shows five tweets at once when run on a phone. If you ran the same app on a tablet, you wouldn’t see the same five tweets — you’d see ten or more tweets. Rather than simply zooming in, the app can show more content at the same time on a tablet, even if it was never optimized for tablet-size screens. While apps designed for smartphones aren’t generally ideal, they adapt much better on Android than they do on an iPad. This is particularly true when it comes to games. You’re capable of playing almost any Android smartphone game on an Android tablet, and games generally adapt very well to the larger screen. This gives you access to a huge catalog of games. It’s a great option to have, especially when you look at Microsoft’s Window 8 and consider how much better the touch-based app and game selection would be if Microsoft allowed its users to run Windows Phone games on Windows 8. 7-inch vs 10-inch Tablets The Twitter example above wasn’t just an example. The official Twitter app for Android still doesn’t have a tablet-optimized interface, so this is the sort of situation you’d have to deal with on an Android tablet. On the popular Nexus 7, Twitter is an example of a smartphone app that actually works fairly well — in portrait mode, you can see many more tweets on screen at the same time and none of the space really feels all that wasted. This is important to consider — smartphone apps like Twitter often scale quite well to 7-inch screens because a 7-inch screen is much closer in form factor to a smartphone than a 10-inch screen is. When you begin to look at 10-inch Android tablets that are the same size as an iPad, the situation changes. While the Twitter app works well enough on a Nexus 7, it looks horrible on a Nexus 10 or other 10-inch tablet. Running many smartphone-designed apps — possible with the exception of games — on a 10-inch tablet is a frustrating, poor experience. There’s much more white, empty space in the interface. It feels like you’re using a smartphone app on a large screen, and what’s the point of that? A tablet-optimized Twitter app for Android is finally on its way, but this same situation will repeat with many other types of apps. For example, Facebook doesn’t offer a tablet-optimized interface, but it’s okay on a Nexus 7 anyway. On a 10-inch screen, it probably wouldn’t be anywhere near as nice an experience. It goes without saying that Facebook and Twitter both offer iPad apps with interfaces designed for a tablet-size screen. Here’s another problematic app — the official Yelp app for Android. Even just using it on a 7-inch Nexus 7 will be a poor experience, while it would be much worse on a larger 10-inch tablet app. Now, it’s true that many — maybe even most — of the popular apps you might want to run today are optimized for Android tablets. But, when you look at the situation when it comes to popular apps like Twitter, Facebook, and Yelp, it’s clear Android is still behind in a meaningful way. Price Let’s be honest. The thing that really makes Android tablets compelling — and the only reason Android tablets started seeing real traction after years of almost complete dominance by Apple’s iPads — is that Android tablets are available for so much cheaper than iPads. Google’s latest Nexus 7 (2013) is available for only $230. Apple’s non-retina iPad Mini is available at $300, which is already $70 more. In spite of that, the iPad Mini has much older, slower internals and a much lower resolution screen. It’s not as nice to look at when it comes to reading or watching movies, and the iPad Mini reportedly struggles to run Apple’s latest iOS 7. In contrast, the new Nexus 7 has a very high resolution screen, speedy internals, and runs Android very well with little-to-no lag in real use. We haven’t had any problems with it, unlike all the problems we unfortunately encountered with the first Nexus 7. For a really comparable experience to the current Nexus 7, you’d want to get one of Apple’s new retina iPad Minis. That would cost you $400, another $170 over the Nexus 7. In fact, it’s possible to regularly find sales on the Nexus 7, so if you waited you could get it for just $200 — half the price of the iPad mini with a comparable screen and internals. (In fairness, the iPad certainly has better hardware — but you won’t feel if it you’re just using your tablet to browse the web, watch videos, and do other typical tablet things.) This makes a tablet like the popular Nexus 7 a very good option for budget-conscious users who just want a high-quality device they can use to browse the web, watch videos, play games, and generally do light computing. There’s a reason we’re focusing on the Nexus 7 here. The combination of price and size brings it to a very good place. It’s awfully cheap for the high-quality experience you get, and the 7-inch screen means that even the non-tablet-optimized apps you may stumble across will often work fairly well. On the other hand, more expensive 10-inch Android tablets are still a tougher sell. For $400-$500, you’re getting awfully close to Apple’s full-size iPad price range and Android tablets don’t have as good an app ecosystem as an iPad. It’s hard to recommend an expensive, 10-inch Android tablet over a full-size iPad to average users. In summary, the Android app tablet app situation is nowhere near as bad as it was a few years ago. The success of the Nexus 7 proves that Android tablets can be compelling experiences, and there are a wide variety of strong apps. That said, more expensive 10-inch Android tablets that compete directly with the full-size iPad on price still don’t make much sense for most people.  Unless you have a specific reason for preferring an Android tablet, it’s tough not to recommend an iPad if you’re looking at spending $400+ on a 10-inch tablet. Image Credit: Christian Ghanime on Flickr, Christian Ghanime on Flickr     

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  • Android: Use XML Layout for List Cell rather than Java Code Layout (Widgets)

    - by Stephen Finucane
    Hi, I'm in the process of making a music app and I'm currently working on the library functionality. I'm having some problems, however, in working with a list view (In particular, the cells). I'm trying to move from a simple textview layout in each cell that's created within java to one that uses an XML file for layout (Hence keeping the Java file mostly semantic) This is my original code for the cell layout: public View getView(int position, View convertView, ViewGroup parent) { String id = null; TextView tv = new TextView(mContext.getApplicationContext()); if (convertView == null) { music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE); musiccursor.moveToPosition(position); id = musiccursor.getString(music_column_index); music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME); musiccursor.moveToPosition(position); id += "\n" + musiccursor.getString(music_column_index); music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM); musiccursor.moveToPosition(position); id += "\n" + musiccursor.getString(music_column_index); tv.setText(id); } else tv = (TextView) convertView; return tv; } And my new version: public View getView(int position, View convertView, ViewGroup parent) { View cellLayout = findViewById(R.id.albums_list_cell); ImageView album_art = (ImageView) findViewById(R.id.album_cover); TextView album_title = (TextView) findViewById(R.id.album_title); TextView artist_title = (TextView) findViewById(R.id.artist_title); if (convertView == null) { music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM); musiccursor.moveToPosition(position); album_title.setText(musiccursor.getString(music_column_index)); //music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME); //musiccursor.moveToPosition(position); music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE); musiccursor.moveToPosition(position); artist_title.setText(musiccursor.getString(music_column_index)); } else{ cellLayout = (TextView) convertView; } return cellLayout; } The initialisation (done in the on create file): musiclist = (ListView) findViewById(R.id.PhoneMusicList); musiclist.setAdapter(new MusicAdapter(this)); musiclist.setOnItemClickListener(musicgridlistener); And the respective XML files: (main) <?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"> <ListView android:id="@+id/PhoneMusicList" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <TextView android:id="@android:id/empty" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1.0" android:text="@string/no_list_data" /> </LinearLayout> (albums_list_cell) <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/albums_list_cell" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageView android:id="@+id/album_cover" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_width="50dip" android:layout_height="50dip" /> <TextView android:id="@+id/album_title" android:layout_toRightOf="@+id/album_cover" android:layout_alignParentTop="true" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/artist_title" android:layout_toRightOf="@+id/album_cover" android:layout_below="@+id/album_title" android:layout_width="wrap_content" android:layout_height="15dip" /> </RelativeLayout> In theory (based on the tiny bit of Android I've done so far) this should work..it doesn't though. Logcat gives me a null pointer exception at line 96 of the faulty code, which is the album_title.setText line. It could be a problem with my casting but Google tells me this is ok :D Thanks for any help and let me know if you need more info!

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  • How to check if vibration happened, in logcat?

    - by Mithraa
    I searched in the web but i couldn find a single article dealing in a straight forward way on how to find the vibrate on/off logs in logcat. If anybody who is aware of the procedure, please enlighten me. Once again i need it specifically to check if my app triggers vibrator or not...

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  • PreferenceActivity and theme not applying

    - by janfsd
    Hi all I have set the theme in the manifest file like this: android:theme="@android:style/Theme.Light" But I have a problem in the Preferences Activity, in the main preferences the theme shows ok, but if I get to a sub preference, the theme gets messy, it is not white as it should, it is all dark, and the font is black so you can't see much, and when I start clicking on any items they will get sometimes white as they should but revert to black soon after. This is only happens on 2.1, in both the real device and emulator. Tested on the emulator running 1.6 and it was working correctly. Here is part of the code of the preferences xml file: <?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"> <PreferenceScreen android:title="@string/account"> <CheckBoxPreference android:key="enable_account" android:title="@string/account_use" android:summary="@string/account_summ" /> <EditTextPreference android:key="username" android:title="@string/login" android:dependency="enable_account" android:summary="@string/login_summ" /> <EditTextPreference android:key="password" android:title="@string/password" android:dependency="enable_account" android:summary="@string/password_summ" android:password="true" /> </PreferenceScreen> And here is a screenshot: Any workarounds?

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  • Android ImageButton with a selected state?

    - by Joren
    If I was using an ImageButton with a selector for its background, is there a state I can change which will make it change its appearance? Right now I can get it to change images when pressed, but there seems to be no "highlighted" or "selected" or similar state which lets me toggle it's appearance at will. Here's my XML, it only changes appearance when pressed. <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/map_toolbar_details_selected" /> <item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/map_toolbar_details_selected" /> <item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/map_toolbar_details_selected" /> <item android:drawable="@drawable/map_toolbar_details" />

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  • Launch market place with id of an application that doesn't exist in the android market place

    - by Gaurav
    Hi, I am creating an application that checks the installation of a package and then launches the market-place with its id. When I try to launch market place with id of an application say com.mybrowser.android by throwing an intent android.intent.action.VIEW with url: market://details?id=com.mybrowser.android, the market place application does launches but crashes after launch. Note: the application com.mybrowser.android doesn't exists in the market-place. MyApplication is my application. $ adb logcat I/ActivityManager( 1030): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=myapp.testapp/.MyApplication } I/ActivityManager( 1030): Start proc myapp.testapp for activity myapp.testapp/.MyApplication: pid=3858 uid=10047 gids={1015, 3003} I/MyApplication( 3858): [ Activity CREATED ] I/MyApplication( 3858): [ Activity STARTED ] I/MyApplication( 3858): onResume D/dalvikvm( 1109): GC freed 6571 objects / 423480 bytes in 73ms I/MyApplication( 3858): Pressed OK button I/MyApplication( 3858): Broadcasting Intent: android.intent.action.VIEW, data: market://details?id=com.mybrowser.android I/ActivityManager( 1030): Starting activity: Intent { act=android.intent.action.VIEW dat=market://details?id=com.mybrowser.android flg=0x10000000 cmp=com.android.ven ding/.AssetInfoActivity } I/MyApplication( 3858): onPause I/ActivityManager( 1030): Start proc com.android.vending for activity com.android.vending/.AssetInfoActivity: pid=3865 uid=10023 gids={3003} I/ActivityThread( 3865): Publishing provider com.android.vending.SuggestionsProvider: com.android.vending.SuggestionsProvider D/dalvikvm( 1030): GREF has increased to 701 I/vending ( 3865): com.android.vending.api.RadioHttpClient$1.handleMessage(): Handle DATA_STATE_CHANGED event: NetworkInfo: type: WIFI[], state: CONNECTED/CO NNECTED, reason: (unspecified), extra: (none), roaming: false, failover: false, isAvailable: true I/ActivityManager( 1030): Displayed activity com.android.vending/.AssetInfoActivity: 609 ms (total 7678 ms) D/dalvikvm( 1030): GC freed 10458 objects / 676440 bytes in 128ms I/MyApplication( 3858): [ Activity STOPPED ] D/dalvikvm( 3865): GC freed 3538 objects / 254008 bytes in 84ms W/dalvikvm( 3865): threadid=19: thread exiting with uncaught exception (group=0x4001b180) E/AndroidRuntime( 3865): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception E/AndroidRuntime( 3865): java.lang.RuntimeException: An error occured while executing doInBackground() E/AndroidRuntime( 3865): at android.os.AsyncTask$3.done(AsyncTask.java:200) E/AndroidRuntime( 3865): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) E/AndroidRuntime( 3865): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) E/AndroidRuntime( 3865): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) E/AndroidRuntime( 3865): at java.util.concurrent.FutureTask.run(FutureTask.java:137) E/AndroidRuntime( 3865): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) E/AndroidRuntime( 3865): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) E/AndroidRuntime( 3865): at java.lang.Thread.run(Thread.java:1096) E/AndroidRuntime( 3865): Caused by: java.lang.NullPointerException E/AndroidRuntime( 3865): at com.android.vending.AssetItemAdapter$ReloadLocalAssetInformationTask.doInBackground(AssetItemAdapter.java:845) E/AndroidRuntime( 3865): at com.android.vending.AssetItemAdapter$ReloadLocalAssetInformationTask.doInBackground(AssetItemAdapter.java:831) E/AndroidRuntime( 3865): at android.os.AsyncTask$2.call(AsyncTask.java:185) E/AndroidRuntime( 3865): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) E/AndroidRuntime( 3865): ... 4 more I/Process ( 1030): Sending signal. PID: 3865 SIG: 3 I/dalvikvm( 3865): threadid=7: reacting to signal 3 I/dalvikvm( 3865): Wrote stack trace to '/data/anr/traces.txt' I/DumpStateReceiver( 1030): Added state dump to 1 crashes D/AndroidRuntime( 3865): Shutting down VM W/dalvikvm( 3865): threadid=3: thread exiting with uncaught exception (group=0x4001b180) E/AndroidRuntime( 3865): Uncaught handler: thread main exiting due to uncaught exception E/AndroidRuntime( 3865): java.lang.NullPointerException E/AndroidRuntime( 3865): at com.android.vending.controller.AssetInfoActivityController.getIdDeferToLocal(AssetInfoActivityController.java:637) E/AndroidRuntime( 3865): at com.android.vending.AssetInfoActivity.displayAssetInfo(AssetInfoActivity.java:556) E/AndroidRuntime( 3865): at com.android.vending.AssetInfoActivity.access$800(AssetInfoActivity.java:74) E/AndroidRuntime( 3865): at com.android.vending.AssetInfoActivity$LoadAssetInfoAction$1.run(AssetInfoActivity.java:917) E/AndroidRuntime( 3865): at android.os.Handler.handleCallback(Handler.java:587) E/AndroidRuntime( 3865): at android.os.Handler.dispatchMessage(Handler.java:92) E/AndroidRuntime( 3865): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime( 3865): at android.app.ActivityThread.main(ActivityThread.java:4363) E/AndroidRuntime( 3865): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 3865): at java.lang.reflect.Method.invoke(Method.java:521) E/AndroidRuntime( 3865): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) E/AndroidRuntime( 3865): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) E/AndroidRuntime( 3865): at dalvik.system.NativeStart.main(Native Method) I/Process ( 1030): Sending signal. PID: 3865 SIG: 3 W/ActivityManager( 1030): Process com.android.vending has crashed too many times: killing! D/ActivityManager( 1030): Force finishing activity com.android.vending/.AssetInfoActivity I/dalvikvm( 3865): threadid=7: reacting to signal 3 D/ActivityManager( 1030): Force removing process ProcessRecord{44e48548 3865:com.android.vending/10023} (com.android.vending/10023) However, when I try to launch the market place for a package that exists in the market place say com.opera.mini.android, everything works. Log for this case: D/dalvikvm( 966): GC freed 2781 objects / 195056 bytes in 99ms I/MyApplication( 1165): Pressed OK button I/MyApplication( 1165): Broadcasting Intent: android.intent.action.VIEW, data: market://details?id=com.opera.mini.android I/ActivityManager( 78): Starting activity: Intent { act=android.intent.action.VIEW dat=market://details?id=com.opera.mini.android flg=0x10000000 cmp=com.android.vending/.AssetInfoActivity } I/AndroidRuntime( 1165): AndroidRuntime onExit calling exit(0) I/WindowManager( 78): WIN DEATH: Window{44c72308 myapp.testapp/myapp.testapp.MyApplication paused=true} I/ActivityManager( 78): Process myapp.testapp (pid 1165) has died. I/WindowManager( 78): WIN DEATH: Window{44c72958 myapp.testapp/myapp.testapp.MyApplication paused=false} D/dalvikvm( 78): GC freed 31778 objects / 1796368 bytes in 142ms I/ActivityManager( 78): Displayed activity com.android.vending/.AssetInfoActivity: 214 ms (total 22866 ms) W/KeyCharacterMap( 978): No keyboard for id 65540 W/KeyCharacterMap( 978): Using default keymap: /system/usr/keychars/qwerty.kcm.bin V/RenderScript_jni( 966): surfaceCreated V/RenderScript_jni( 966): surfaceChanged V/RenderScript( 966): setSurface 480 762 0x573430 D/ViewFlipper( 966): updateRunning() mVisible=true, mStarted=true, mUserPresent=true, mRunning=true D/dalvikvm( 978): GC freed 10065 objects / 624440 bytes in 95ms Any ideas? Thanks in advance!

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  • Does Android XML Layout's 'include' Tag Really Work?

    - by Eric Burke
    I am unable to override attributes when using <include> in my Android layout files. When I searched for bugs, I found Declined Issue 2863: "include tag is broken (overriding layout params never works)" Since Romain indicates this works in the test suites and his examples, I must be doing something wrong. My project is organized like this: res/layout buttons.xml res/layout-land receipt.xml res/layout-port receipt.xml The buttons.xml contains something like this: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <Button .../> <Button .../> </LinearLayout> And the portrait and landscape receipt.xml files look something like: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> ... <!-- Overridden attributes never work. Nor do attributes like the red background, which is specified here. --> <include android:id="@+id/buttons_override" android:background="#ff0000" android:layout_width="fill_parent" layout="@layout/buttons"/> </LinearLayout> What am I missing?

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  • Android custom categories

    - by marian
    Hello, I have a view as a main screen of the application which contains the available application's actions as icon+text pairs ( desktop like). I want to find out programatically what are the activities defined ONLY in my AndroidManifest.xml Suppose I have : < activity android:name="example.mainActivity" android:label="mainActivity" < intent-filter < action android:name="android.intent.action.MAIN" / < category android:name="android.intent.category.LAUNCHER" / < /intent-filter < /activity < activity android:name="example.activity1" android:label="Activity1" < intent-filter < action android:name="android.intent.action.VIEW" / < category android:name="example.custom.ACTIVITY" / < /intent-filter < /activity < activity android:name="example.activity2" android:label="Activity2" < intent-filter < action android:name="android.intent.action.VIEW" / < category android:name="example.custom.ACTIVITY" / < /intent-filter < /activity I want that in the mainActivity to dinamically read Activity1 and Activity2 because when i add Activity3 for example it will be automatically read. I thought that this could be done by defining a custom category, example.custom.ACTIVITY, and in the mainActivity use the packageManager.queryIntentActivities(Intent intent, int flags) but it doesn't seem to be working. I really would like to code it to dinamically discover the installed activities in my application. Do you have any ideas on how to do this? Thank you

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  • Urgent : Getting error on uploading apk to Android market

    - by Farha Ansari
    Hi, i m uploading my apk for 1st time on market and getting Error:The server could not process your apk. Try . My manifest file is:- <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="packagename" android:versionCode="1" android:versionName="1.0"> <uses-permission android:name="android.permission.INTERNET"> </uses-permission> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"> </uses-permission> <application android:icon="@drawable/iccicon" android:label="@string/app_name" android:debuggable="false"> <activity android:name=".Activity1" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Activity2" android:label="@string/app_name" android:windowSoftInputMode="adjustPan" android:configChanges="keyboardHidden|orientation"> </activity> </application> <uses-sdk android:minSdkVersion="4" android:targetSdkVersion="4"/> <uses-configuration android:reqHardKeyboard="true" android:reqKeyboardType="qwerty"> </uses-configuration> </manifest> Please help. Thanks.

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  • Changing text of TextView -- old text doesn't go away (Android 4.1.2)

    - by Jason Costabile
    I'm pretty new to Android development. Trying to accomplish something fairly simple -- change some displayed text when a timer ticks. Here's the potentially relevant code: CountDownTimer currentTimer; Resources res; TextView timerText; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_exercise); res = getResources(); timerText = (TextView) findViewById(R.id.timer_text); } @Override protected void onStart() { super.onStart(); //"Get ready" countdown currentTimer = new CountDownTimer(5000, 1000) { @Override public void onTick(long millisUntilFinished) { timerText.setText("" + (int)Math.ceil(millisUntilFinished / 1000.0)); } @Override public void onFinish() { ... } }; currentTimer.start(); } This works fine on an emulated 4.2.2 device, but on a 4.1.2 device (both physical and emulated), the changed TextView appears as such while the countdown proceeds: If you can't tell, that's the numbers 5,4,3 overlayed. So, when I set a new string for the TextView, the new string is displayed but without replacing the old string. Any other TextViews used in my app behave in the same way. Any ideas what the problem is and how to fix it? Edit: From the XML layout file: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" tools:context=".ExerciseActivity" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:keepScreenOn="true" android:orientation="vertical" > ... <TextView android:id="@+id/timer_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:textIsSelectable="false" android:hint="@string/timer_default" /> ... </LinearLayout> That's all that could be relevant.

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  • Android - Widget to Play Video (onclick trouble)

    - by Josh
    I am trying to make a simple widget that will play a movie from the sdcard when clicked on. This seems simple enough, and by following tutorials I've come up with the following code, but it seems the onclick is never setup. Manifest: <receiver android:name="WidgetProvider" android:label="DVD Cover"> <intent-filter> <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/> </intent-filter> <meta-data android:name="android.appwidget.provider" android:resource="@xml/appwidget_info_2x4"/> </receiver> Layout (widget.xml): <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/holder" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ff777777" > <ImageView android:id="@+id/cover" android:layout_width="wrap_content" android:layout_height="fill_parent" android:textColor="#000000" /> </LinearLayout> appwidget.xml: <?xml version="1.0" encoding="utf-8"?> <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" android:minWidth="200dip" android:minHeight="300dip" android:updatePeriodMillis="180000" android:initialLayout="@layout/widget" > </appwidget-provider> WidgetProvider.java: public class WidgetProvider extends AppWidgetProvider { public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { String movieurl = Environment.getExternalStorageDirectory().getPath() + "/Movie.mp4"; Intent notificationIntent = new Intent(Intent.ACTION_VIEW); notificationIntent.setDataAndType(Uri.parse(movieurl), "video/*"); PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent,0); // Get the layout for the App Widget and attach an on-click listener // to the button RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget); views.setOnClickPendingIntent(R.id.holder, contentIntent); // Tell the AppWidgetManager to perform an update on the current app widget appWidgetManager.updateAppWidget(appWidgetIds, views); } } Any help would be greatly appreciated. Thanks, Josh

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  • Does Android XML Layout's 'include' Tag Really Work?

    - by Eric Burke
    I am unable to override attributes when using <include> in my Android layout files. When I searched for bugs, I found Declined Issue 2863: "include tag is broken (overriding layout params never works)" Since Romain indicates this works in the test suites and his examples, I must be doing something wrong. My project is organized like this: res/layout buttons.xml res/layout-land receipt.xml res/layout-port receipt.xml The buttons.xml contains something like this: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <Button .../> <Button .../> </LinearLayout> And the portrait and landscape receipt.xml files look something like: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> ... <!-- Overridden attributes never work. Nor do attributes like the red background, which is specified here. --> <include android:id="@+id/buttons_override" android:background="#ff0000" android:layout_width="fill_parent" layout="@layout/buttons"/> </LinearLayout> What am I missing?

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  • How do I use PackageManager.addPreferredActivity()?

    - by afonseca
    In SDK 1.5 I was using the PackageManager class to set the preferred home screen to be my app using PackageManager.addPackageToPreferred(). In the new SDK (using 2.1) this has been deprecated so I'm trying to use addPreferredActivity() for the same result but it's not working as expected. Some necessary background. I'm writing a lock screen replacement app so I want the home key to launch my app (which will already be running, hence having the effect of disabling the key). When the user "unlocks" the screen I intend to restore the mapping so everything works as normal. In my AndroidManifest.xml I have: <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> <category android:name="android.intent.category.HOME"/> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> <uses-permission android:name="android.permission.SET_PREFERRED_APPLICATIONS"> </uses-permission> In my code I have the following snippet: // Set as home activity // This is done so we can appear to disable the Home key. PackageManager pm = getPackageManager(); //pm.addPackageToPreferred(getPackageName()); IntentFilter filter = new IntentFilter("android.intent.action.MAIN"); filter.addCategory("android.intent.category.HOME"); filter.addCategory("android.intent.category.DEFAULT"); ComponentName[] components = new ComponentName[] { new ComponentName("com.android.launcher", ".Launcher") }; Context context = getApplicationContext(); ComponentName component = new ComponentName(context.getPackageName(), MyApp.class.getName()); pm.clearPackagePreferredActivities("com.android.launcher"); pm.addPreferredActivity(filter, IntentFilter.MATCH_CATEGORY_EMPTY, components, component); The resulting behavior is that the app chooser comes up when I press the Home key, which indicates that the clearPackagePreferredActivities() call worked but my app did not get added as the preferred. Also, the first line in the log below says something about "dropping preferred activity for Intent": 04-06 02:34:42.379: INFO/PackageManager(1017): Result set changed, dropping preferred activity for Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10200000 } type null 04-06 02:34:42.379: INFO/ActivityManager(1017): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10200000 cmp=android/com.android.internal.app.ResolverActivity } Does anyone know what this first log message means? Maybe I'm not using the API correctly, any ideas? Any help would be greatly appreciated.

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  • Linear layout and custom dialog

    - by DixieFlatline
    The button doesn't show in this layout(code below),image and textview are shown. I tried using relative layout but that doesn't help either. I'm testing it on 1.5 emulator. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout_root" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="10dp" > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/neki" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="fill_parent" > <ImageView android:id="@+id/image" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginRight="10dp" /> <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="fill_parent" android:textColor="#FFF" android:text="Some text " /> </LinearLayout> <Button android:id="@+id/gumbek" android:text="V redu" android:typeface="serif" android:textStyle="bold" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>

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  • Android Window Mananger leacked windwo progress dialog

    - by saravanan-palpandi
    05-14 16:53:52.273: ERROR/WindowManager(412): Activity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@43db2e68 that was originally added here 05-14 16:53:52.273: ERROR/WindowManager(412): android.view.WindowLeaked: Activity com.sss.client.AddClient has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@43db2e68 that was originally added here 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.ViewRoot.(ViewRoot.java:227) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.Window$LocalWindowManager.addView(Window.java:424) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.app.Dialog.show(Dialog.java:239) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.app.ProgressDialog.show(ProgressDialog.java:107) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.app.ProgressDialog.show(ProgressDialog.java:90) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.app.ProgressDialog.show(ProgressDialog.java:85) 05-14 16:53:52.273: ERROR/WindowManager(412): at com.sss.client.AddClient.searchValues(AddClient.java:236) 05-14 16:53:52.273: ERROR/WindowManager(412): at com.sss.client.AddClient.clientFormAction(AddClient.java:264) 05-14 16:53:52.273: ERROR/WindowManager(412): at java.lang.reflect.Method.invokeNative(Native Method) 05-14 16:53:52.273: ERROR/WindowManager(412): at java.lang.reflect.Method.invoke(Method.java:521) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.View$1.onClick(View.java:2026) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.View.performClick(View.java:2364) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.View.onTouchEvent(View.java:4179) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.widget.TextView.onTouchEvent(TextView.java:6540) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.View.dispatchTouchEvent(View.java:3709) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 05-14 16:53:52.273: ERROR/WindowManager(412): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659) 05-14 16:53:52.273: ERROR/WindowManager(412): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.app.Activity.dispatchTouchEvent(Activity.java:2061) 05-14 16:53:52.273: ERROR/WindowManager(412): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.os.Handler.dispatchMessage(Handler.java:99) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.os.Looper.loop(Looper.java:123) 05-14 16:53:52.273: ERROR/WindowManager(412): at android.app.ActivityThread.main(ActivityThread.java:4363) 05-14 16:53:52.273: ERROR/WindowManager(412): at java.lang.reflect.Method.invokeNative(Native Method) 05-14 16:53:52.273: ERROR/WindowManager(412): at java.lang.reflect.Method.invoke(Method.java:521) 05-14 16:53:52.273: ERROR/WindowManager(412): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 05-14 16:53:52.273: ERROR/WindowManager(412): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 05-14 16:53:52.273: ERROR/WindowManager(412): at dalvik.system.NativeStart.main(Native Method) when show the dialog box it show the error message please do reply me

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  • Self updating app, wont overwrite existing app, using Android packagemanager?

    - by LokiSinclair
    I know there are plenty of questions about this on here, but I've tried everything (but the correct 'thing', obviously!) and nothing seems to shine any light on the problem I'm having. I've written an app (for a customer), which is designed to be hosted on their own server. The app references a simple text file with the latest version code in it and checks it against it's own version. If it's out of date it goes off and downloads the update. Everything is working as intended up to this point. I use the: Intent i = new Intent(Intent.ACTION_VIEW); i.setDataAndType(Uri.fromFile(outputFile), "application/vnd.android.package-archive"); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(i); ...code to start the install process of the newly downloaded .apk file. And that all starts as I would expect. I click on "Install" - when I'm prompted to confirm the overwriting of the current app, with the new. It starts, and then displays: App not installed. And existing package by the same name with a conflicting signature is already installed. Now I'm aware that Android can't have multiple applications sharing the same package name, which is fine, but nothing comes up in LogCat and I can only assume that the OS is annoyed at me attempting to 'update' my app, even though I'm going through all the correct channels and using the inbuilt package manager to do it for me! Can anyone tell me what the OS is moaning about? I'm not attempting to install two apps side by side, I want it to update it, which it starts to do, and then gets really confused. Is it something to do with me using the same keystore for signing the packages? I highly doubt it as I've used the same keystores previously to handle updates to games and the like, but I just can't figure out what it's complaining about. Hopefully someone out there has had this issue and solved it, and can point me in the right direction. I'm flying a bit blind with the limited information it's giving me :( Cheers.

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  • Android Debugging with Logcat and Emulator. Is it possible?

    - by DJTripleThreat
    This is pretty simple: I'm using NetBeans on Linux with Android emulator 1.6. I have Logcat on my android phone, but the process of getting the messages to somewhere readable isn't smooth at all. Can someone tell me how to get Logcat running on the emulator? Is there anything I can do to see debug messages other then having to copy the apk to my phone and testing it? Thanks in advance!

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  • Android never receives UDP packet

    - by Quandary
    The below code results in a timeout. It works fine on non-Android Java. What's the matter? //@Override public static void run() { //System.out.println ( "Local Machine IP : "+addrStr.toString ( ) ) ; HelloWorldActivity.tv.setText("Trace 1"); try { // Retrieve the ServerName InetAddress serverAddr; //= InetAddress.getByName(Server.SERVERIP); InetAddress ias[] = InetAddress.getAllByName(Server.SERVERNAME); serverAddr = ias[0]; Log.d("UDP", "C: Connecting..."); /* Create new UDP-Socket */ DatagramSocket socket = new DatagramSocket(); /* Prepare some data to be sent. */ String strQuery="ÿÿÿÿgetservers"+" "+Server.iProtocol+" "+"'all'"; Log.d("UDP", strQuery); //byte[] buf = ("ÿÿÿÿgetservers 68 'all'").getBytes(); byte[] buf = strQuery.getBytes(); /* Create UDP-packet with * data & destination(url+port) */ DatagramPacket packet = new DatagramPacket(buf, buf.length, serverAddr, Server.SERVERPORT); Log.d("UDP", "C: Sending: '" + new String(buf) + "'"); /* Send out the packet */ socket.setSoTimeout(5000); socket.send(packet); Log.d("UDP", "C: Sent."); Log.d("UDP", "C: Done."); // http://code.google.com/p/android/issues/detail?id=2917 byte[] buffer= new byte[1024*100]; DatagramPacket receivePacket = new DatagramPacket(buffer, buffer.length); //, serverAddr, Server.SERVERPORT); socket.receive(receivePacket); HelloWorldActivity.tv.setText("TTT"); String x = new String(receivePacket.getData()); Log.d("UDP", "C: Received: '" + x + "'"); HelloWorldActivity.tv.setText(x); } catch (Exception e) { HelloWorldActivity.tv.setText(e.getMessage()); Log.e("UDP", "C: Error", e); } } public class Server { /* //public static java.lang.string SERVERIP; public static String SERVERNAME = "monster.idsoftware.com"; public static String SERVERIP = "192.246.40.56"; public static int SERVERPORT = 27950; public static int PROTOCOL = 68; */ //public static String SERVERNAME="monster.idsoftware.com"; public static String SERVERNAME="dpmaster.deathmask.net"; public static String SERVERIP="192.246.40.56"; public static int SERVERPORT=27950; //public static int iProtocol= 68; // Quake3 public static int iProtocol=71; // OpenArena } Android manifest: <?xml version="1.0" encoding="utf-8"?> <use-permission id="android.permission.READ_CONTACTS" /> <use-permission android:name="android.permission.WRITE_SETTINGS" /> <uses-permission android:name="android.permission.READ_CONTACTS" /> <uses-permission android:name="android.permission.CALL_PHONE" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_GPS" /> <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS" /> <uses-permission android:name="android.permission.ACCESS_CELL_ID" /> <uses-permission android:name="android.permission.RECEIVE_SMS" /> <uses-permission android:name="android.permission.VIBRATE" /> <uses-permission android:name="android.permission.WAKE_LOCK" /> <application android:icon="@drawable/icon" android:label="AAA New Application" > <activity android:name="HelloWorldActivity"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application>

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  • Can I use android.os.* libraries in a standalone project?

    - by medicdave
    I'm trying to develop an external library (not sure if that's the right term) to provide prepackaged functionality in Android projects. Working in Eclipse, I've added the appropriate android.jar file to the build path, and everything is happy both while editing and upon compilation. However, when I use Android's Handler and Message classes (android.os.Handler, android.os.Message) for inter-thread communication, I get exceptions unless I'm running within an Android app, on the emulator or a device. I can no longer test my library in a "standalone" way without having to go through a running Android target. Is there any way for me to include these two Android classes and still be able to test my library standalone? Do I need to have the Android source available? Or would it require some sort of conditional compilation hand-waving?

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  • How to publish paid Android apps if you're not from US/UK

    - by Sheikh Aman
    I was pretty excited while creating one of my apps but as it turns out you can't actually sign up for Google Checkout if you don't live either in the USA or in the UK. And since Google Checkout is the only way Android Market will pay you, all my efforts seem to be going in vain. So because I live in India, I can't sell my apps. I tried contacting Google by various means on this, but haven't got any response so far. I tried searching the web as well just to find out that one can't be paid via any other way. I am pretty sure that many people here might have gone through the same problem. How did you solve it? I have a PayPal account and an AdSense account as well. Can they help in any way? And if nothing works out, how am I supposed to be selling my app?

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  • Databinding a ListView with Mono for Android

    - by Wallym
    The world lives on data. Data is all around us and in many forms: salespeople need to know what customers have spent; twitter users want to know what their friends are saying. How do we as developers present data to a user? In Android, we use the ListView in its various forms. In this article, we'll look at using a ListView, how we can work with it, then discuss what we need to do to overcome some of the challenges in a mobile environment.Article url: http://visualstudiomagazine.com/articles/2012/09/14/databind-a-listview.aspx

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  • Why is Android VM-based? [closed]

    - by adib
    By about 2004, it was clear that ARM is the clear winner for mobile CPUs, beating out MIPS, SH3, and DragonBall. PocketPC (Windows Mobile) applications was natively-compiled (at least most of them - except for .NET compact and its competitors). Likewise, Apple's iOS (named iPhone OS at the time) prefers natively-compiled applications. Then why Android chose a virtual machine based system stack? (the Dalvik VM). Wouldn't it be simpler to just compile applications down to ARM code using GCJ or something? Is the decision influenced by the J2ME-way of doing things, or was just because it's "cool"? Perhaps like most things Java, the culture that prefers multiple levels of indirection and abstractions, they just added another layer of abstraction for "just in case"?

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  • Android design advice - services & broadcast receivers

    - by basudz
    I'm in the process of learning the Android SDK and creating some projects to get a grasp on the system. The current project I'm working with works just fine but I'd like to get some advice about other ways I can go about designing it. Here's what it needs to do. When a text message is received from a specific number, it should fire off a toast message that repeats at a certain interval for a specific duration. To make this work, I created an SMS BroadcastReceiver and checked the incoming messages for the number I'm looking for. If found, an IntentService would be started that would pull out the interval and duration from saved shared prefs. The IntentService would then fire off a broadcast. The BroadcastReceiver for this would catch it and use the AlarmManager to handle the toast message repetitions. This all works just fine, but I'm wondering if there's a cleaner or more efficient way of going about doing this? Any suggestions or advice?

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