Develop Reference

FFmpegMediaPlayer: findLibrary returned null

I use https://github.com/wseemann/FFmpegMediaPlayer in my application, but some Android device throw exception:
java.lang.ExceptionInInitializerError
at ru.mypackage.PlayService.initPlayer(PlayService.java:74)
at ru.mypackage.PlayService.onCreate(PlayService.java:68)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:1949)
at android.app.ActivityThread.access$2500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:989)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.UnsatisfiedLinkError: Couldn't load avutil: findLibrary returned null
at java.lang.Runtime.loadLibrary(Runtime.java:429)
at java.lang.System.loadLibrary(System.java:554)
at wseemann.media.FFmpegMediaPlayer.<clinit>(FFmpegMediaPlayer.java:620)
... 13 more
My project:
Can somebody explain me what's wrong there?
On my device and some other device the app working nice, but on some device (for example: Galaxy Ace (GT-S5830i) Android 2.3.3 - 2.3.7) it throw the exception.
p.s. about "lib" prefix I understood ( https://developer.android.com/reference/java/lang/System.html#mapLibraryName(java.lang.String) )

You have to place the armeabi file under jnilibs folder (you will have to create it) in app/src/main/.
Hope it helps.

SecurityException DownloadManager for android 3.2

I cant use download manager for android 3.2 cause app crashes.
Log Cat:
java.lang.SecurityException: Invalid value for visibility: 1
at android.os.Parcel.readException(Parcel.java:1321)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:182)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:136)
at android.content.ContentProviderProxy.insert(ContentProviderNative.java:447)
at android.content.ContentResolver.insert(ContentResolver.java:721)
at android.app.DownloadManager.enqueue(DownloadManager.java:1172)
at gr.backatel.videotomp3download.MainActivity$10.onDownloadStart(MainActivity.java:800)
at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:389)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4125)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method)
The only thing that i can do is to check if android version is 3.2 and then start download so as to avoid device to crash.

<uses-permission
android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
Try This

GCM issues on the android client

I have an android app that was working previously, I had to set up the dev environment on a new PC. Everything compiles fine (i'm using Android Studio), but I get the following error:
11-26 15:25:22.737 15132-15132/com.sample E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: com.google.android.gcm.GCMRegistrar
at com.sample.views.loginregistration.LoginManager.handleRegistration(LoginManager.java:147)
at com.sample.views.loginregistration.LoginViewFragment.onCreateView(LoginViewFragment.java:74)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:871)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:635)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1431)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:523)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1171)
at android.app.Activity.performStart(Activity.java:5143)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
It's saying it cannot find gcm.jar which is clearly in the project and in a folder called libs. These were the common issues that people reported in other SO posts. The app basically launches and then crashes on the spot... But i'm confused as the setup is correct.
Is there anything else that could be wrong with this?

It might be a build.gradle issue. You should have this in your build.gradle file
dependencies {
compile files('libs/gcm.jar')
}
Once you've added that, go to Tools -> Android -> Sync Project with Gradle Files

java.lang.NoSuchMethodError - ErrorActivity.onCreate()

I am new to android apps development, and for somehow I am getting errors in my playgoogle apps account.
can anyone explain which kind of error is this?
java.lang.NoSuchMethodError: dk.danyal.kids.channel.ErrorActivity.getActionBar
at dk.danyal.kids.channel.ErrorActivity.onCreate(ErrorActivity.java:19)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1670)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3695)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)

Probably your application is for Android 3.0 or higher and you are running it on Android 2.x

Your Project should target Android version 3.0 or above to use getActionBar() function.

To have the ActionBar in older versions of Android, you can have a look at ActionBarSherlock (http://actionbarsherlock.com/). It uses the ActionBar when it is available, and falls back on a custom implementation if it isn't available.

AdWhirl with Admob bug fix

Updated to the latest version of AdWhirl and AdMob SDK but getting a known error from the AdMob SDK in Android 2.1-update1. Found in this thread https://groups.google.com/forum/#!topic/google-admob-ads-sdk/cNxRgIUHJH0
but it refers to only and AdMob fix not AdWhirl any clue what changes can be made to the AdWhirl SDK to fix this?
Thanks In Advance!
java.lang.NullPointerException
at android.webkit.WebView.getSettings(WebView.java:2791)
at android.webkit.WebView.onWindowFocusChanged(WebView.java:3616)
at android.view.View.dispatchWindowFocusChanged(View.java:3764)
at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:754)
at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:758)
at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:758)
at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:758)
at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:758)
at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:758)
at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:758)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1819)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4370)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
How about this one:
java.lang.NullPointerException
at com.adwhirl.AdWhirlLayout.handleAd(AdWhirlLayout.java:227)
at com.adwhirl.AdWhirlLayout.access$3(AdWhirlLayout.java:215)
at com.adwhirl.AdWhirlLayout$HandleAdRunnable.run(AdWhirlLayout.java:410)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3691)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)
at dalvik.system.NativeStart.main(Native Method)

The issue is not in the AdWhirl code, or even the AdMob code. This is a NullPointerException in the Android WebView, and there is no known workaround for the AdMob/AdWhirl code. This shouldn't be happening that often, but if it really is a deal breaker, you may want to turn down the number of requests you're sending to AdMob.

Yes, I also have this problem.
My workaround: extend AdWhirlLayout, override dispatchWindowFocusChanged and every other method that have this exception occurring and catch the exception.