I got an null pointer exception on Android 3.2 emulator on a simple
Android project created by Wizerd with a service in separated process,
when I switch between "Stretch to fill screen" to "Zoom to fill
screen". This crash will *not* happen if the service is put into the
same process with main activity, namely "android:process" attribute
not specified. While it only happens when I add "android:process" to
manifest file for my test service.
The exception is:
FATAL EXCEPTION: main
java.lang.NullPointerException
at
android.view.WindowManagerImpl.reportNewConfiguration(WindowManagerImpl.java:
427)
at
android.app.ActivityThread.handleUpdatePackageCompatibilityInfo(ActivityThread.java:
2801)
at android.app.ActivityThread.access$2700(ActivityThread.java:
122)
at android.app.ActivityThread
$H.handleMessage(ActivityThread.java:1151)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4123)
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:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method) My test code:
TestActivity.java (Generated by Wizerd)
=====================
package com.test;
import android.app.Activity;
public class TestActivity extends Activity {
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent intent = new Intent(this, TestService.class);
startService(intent);
} }
=====================
TestService.java (Most of the functions are empty)
=====================
Package com.test;
import android.content.ComponentName;
public class TestService extends Service {
private boolean m_connected = false;
private ServiceConnection m_connInitService = new
ServiceConnection() {
public void onServiceConnection(ComponentName className,
IBinder service) {
m_connected = true;
}
public void onServiceDisconnected(ComponentName className) {
}
};
public static class TestServiceBinder extends Binder {
}
public IBinder onBind(Intent intent) {
return new TestServiceBinder();
}
public void onDestroy() {
super.onDestroy();
}
public int onStartCommand(Intent intent, int flags, int startId)
{
return 1;
}
}
=====================
If I run the test app without service or with service in the same
process (with main activity) the screen compatibility switch will
*not* cause any problem. However, I do not understand why service can
cause system exception during screen compatibility switch. Is this
because service process is a non-UI process? Which could potentially
triggers a bug inside the Android core code?
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