问题
I have an application with TabActivity in which I am displaying a dialog each time I get a callback from my engine (NDK C code). I make sure dialog is displayed when app is in resume state.
Upon receiving the callback from the engine, I start the NetworkDownDialog activity, but this causes the dialog to stay for a second and then disappear. The same thing happens if I use Dialog or AlertDialog. Most strangely, the disappearance seems random (doesn't always happen).
This is an S3 device. What's going on?
Edit on 23/05/2013
Network Down Dialog Code
public class NetworkDownDialog extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.network_down);
Logger.d("NetworkDownDialog", "----------onCreate-----------");
registerReceiver(mNetworkDownReceiver, new IntentFilter("NetworkDown"));
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(mNetworkDownReceiver);
Logger.d("NetworkDownDialog", "------onDestroy-------");
}
@Override
protected void onResume() {
super.onResume();
Logger.d("NetworkDownDialog", "------onResume-------");
}
@Override
protected void onRestart() {
super.onRestart();
Logger.d("NetworkDownDialog", "------onRestart-------");
}
@Override
protected void onStart() {
super.onStart();
Logger.d("NetworkDownDialog", "------onStart-------");
}
@Override
protected void onStop() {
super.onStop();
Logger.d("NetworkDownDialog", "------onStop-------");
}
@Override
public void onBackPressed() {
Logger.d("NetworkDownDialog", "------onBackPressed Do nothing-------");
}
private BroadcastReceiver mNetworkDownReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
finish();
}
};
}
In the logs, this is what I see:
05-15 20:48:02.981 D/NetworkDownDialog( 1050): ------onCreate-------
05-15 20:48:02.981 D/alsa_ucm( 202): Setting mixer control: RX5 MIX1 INP2, value: RX2
05-15 20:48:02.991 D/alsa_ucm( 202): Setting mixer control: RX6 DSM MUX, value: DSM_INV
05-15 20:48:02.991 D/alsa_ucm( 202): Setting mixer control: LINEOUT2 Volume, value: 100
05-15 20:48:02.991 D/alsa_ucm( 202): Setting mixer control: LINEOUT4 Volume, value: 100
05-15 20:48:02.991 D/NetworkDownDialog( 1050): ------onStart-------
05-15 20:48:02.991 D/alsa_ucm( 202): Setting mixer control: RX5 Digital Volume, value: 65
05-15 20:48:02.991 D/NetworkDownDialog( 1050): ------onResume-------
Activity Dialog displayed
**05-15 20:48:05.073 W/InputDispatcher( 716): channel ~ Consumer closed input channel or an error occurred. events=0x9
05-15 20:48:05.073 E/InputDispatcher( 716): channel ~ Channel is unrecoverably broken and will be disposed!**
05-15 20:48:05.073 W/InputDispatcher( 716): Attempted to unregister already unregistered input channel
05-15 20:48:05.083 I/SurfaceFlinger( 195): id=2033 Removed idx=5 MapSz=4
05-15 20:48:05.083 D/KeyguardViewMediator( 716): setHidden false
05-15 20:48:05.103 I/Adreno200-EGLSUB( 195): <CreateImage:897>: Android Image
05-15 20:48:05.103 I/Adreno200-EGLSUB( 195): <GetImageAttributes:1106>: RGBA_8888
**05-15 20:48:05.103 E/BufferQueue( 195): [mypackage.NetworkDownDialog] dequeueBuffer: SurfaceTexture has been abandoned!
05-15 20:48:05.103 E/SurfaceTextureClient( 1050): dequeueBuffer failed (No such device**)
05-15 20:48:05.103 D/PhoneStatusBar( 894): addNotification score=0
05-15 20:48:05.123 E/ViewRootImpl( 1050): Could not lock surface
05-15 20:48:05.123 E/ViewRootImpl( 1050): java.lang.IllegalArgumentException
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.Surface.lockCanvasNative(Native Method)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.Surface.lockCanvas(Surface.java:88)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.ViewRootImpl.drawSoftware(ViewRootImpl.java:2314)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.ViewRootImpl.draw(ViewRootImpl.java:2277)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2145)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1956)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1110)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4472)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.Choreographer.doFrame(Choreographer.java:525)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.os.Handler.handleCallback(Handler.java:615)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.os.Handler.dispatchMessage(Handler.java:92)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.os.Looper.loop(Looper.java:137)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at android.app.ActivityThread.main(ActivityThread.java:4918)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at java.lang.reflect.Method.invokeNative(Native Method)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at java.lang.reflect.Method.invoke(Method.java:511)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
05-15 20:48:05.123 E/ViewRootImpl( 1050): at dalvik.system.NativeStart.main(Native Method)
In this case, the ActivityDialog disappeared after the above.
Why is my dialog disappearing? Is it possible that memory corruption at my C level native code is causing this problem? Am I doing something wrong on the UI side? I'm totally stuck...
Edit on 24 -05 -2013
05-24 19:49:00.025 I/SurfaceFlinger( 1901): id=2147 Removed NainTabActivity idx=3 MapSz=4
05-24 19:49:00.025 I/SurfaceFlinger( 1901): id=2147 Removed NainTabActivity idx=-2 MapSz=4
SurfaceFlinger removed my tabactivity.Will this can cause dialog remove?
回答1:
- Make Sure that the you are displaying the dialog with application context.
- Make sure no two events come and hit the same part of code.i.e when you are about to display the dialog,one more event from c code to display the dialog.
- Make Sure your application has enough memory to run smoothly.
回答2:
The error you are getting is due to not having the screen ready to display anything at the time you are calling the dialog.show().
Another (possible) solution for you is to use a system dialog like in this example:
AlertDialog dialog = new AlertDialog.Builder(context)
.setMessage(text)
.setPositiveButton(R.string.ok, null)
.setCancelable(true)
.create();
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
回答3:
After seeing your code, I would recommend that you remove finish() in your BroadcastReceiver and run your program (for testing purposes). The problem you're seeing may happen due to having your Activity starting and ending almost at the same time.
回答4:
I think the problem is due to the surface not being locked. Here are some solution which I found at SO.
Hope they help.
android-canvas-locking and android-draw-on-camera-preview
回答5:
When I have seen(channel ~ Consumer closed input channel) before followed by an error I have found it to indicate that the app was closing either by design or an exception raised elsewhere. My hunch would be that you are either terminating your activity or encountering an exception around the same time the dialog is displaying causing your app to start to exit. I'd also add more Logging to any place you call finish to verify you aren't accidentally finishing as you display the dialog.
回答6:
Well well problem was with c code some file descriptor fd corrupt was causing this issue.once the issue was solved at c level the problem is not seen.pretty strange though.
来源：https://stackoverflow.com/questions/16564068/android-activity-dialog-dialog-disappears-unexpectedly