Android: NullPointer after trying to make an intent after onTab on ItemizedOverly

Question

I have a MapsActivity in a TabHostActivity where I put a custom ItemizedOverlay over the map to display custom OverlayItems.

In my ItemizedOverlay class the onTab method looks as follows

@Override
protected boolean onTap(int index) {
    listener.onPoiTap(this.poiList.get(index));
    return true;
}

where the listener variable is a custom onTabListener which is implemented in the maps Activity as follows:

@Override
public void onPoiTap(PointOfInterest poi) {
    Intent intent = new Intent();
    intent.setClass(getParent(), PointOfInterestActivity.class);

    ActivityStack activityStack = (ActivityStack) this.getParent();
    activityStack.push(new Date().getTime() + "", intent);
    // Toast.makeText(this, "Title: " + poi.getTitle(), Toast.LENGTH_SHORT).show();
}

The Toast after the comment works and shows the right title, but the call of the intent makes the app crash and shows a log without any references to my code:

I/InputReader( 2284): Touch event's action is 0x0 (deviceType=0) [pCnt=1, s=0.749 ]
I/InputDispatcher( 2284): Delivering touch to current input target: action: 0x0
I/InputDispatcher( 2284): Delivering touch to current input target: action: 0x0
I/InputDispatcher( 2284): Delivering touch to current input target: action: 0x0
I/InputReader( 2284): Touch event's action is 0x1 (deviceType=0) [pCnt=1, s=]
I/InputDispatcher( 2284): Delivering touch to current input target: action: 0x1
I/InputDispatcher( 2284): Delivering touch to current input target: action: 0x1
I/InputDispatcher( 2284): Delivering touch to current input target: action: 0x1
E/InputEventReceiver(22509): Exception dispatching input event.
E/MessageQueue-JNI(22509): Exception in MessageQueue callback: handleReceiveCallback
E/MessageQueue-JNI(22509): java.lang.NullPointerException
E/MessageQueue-JNI(22509):  at com.google.android.maps.GestureDetector.onTouchEvent(GestureDetector.java:548)
E/MessageQueue-JNI(22509):  at com.google.android.maps.MapView.onTouchEvent(MapView.java:683)
E/MessageQueue-JNI(22509):  at android.view.View.dispatchTouchEvent(View.java:7337)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2410)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2145)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2109)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1462)
E/MessageQueue-JNI(22509):  at android.app.Activity.dispatchTouchEvent(Activity.java:2472)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2057)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2109)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1462)
E/MessageQueue-JNI(22509):  at android.app.Activity.dispatchTouchEvent(Activity.java:2472)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2057)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/MessageQueue-JNI(22509):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2109)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1462)
E/MessageQueue-JNI(22509):  at android.app.Activity.dispatchTouchEvent(Activity.java:2472)
E/MessageQueue-JNI(22509):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2057)
E/MessageQueue-JNI(22509):  at android.view.View.dispatchPointerEvent(View.java:7520)
E/MessageQueue-JNI(22509):  at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3374)
E/MessageQueue-JNI(22509):  at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3306)
E/MessageQueue-JNI(22509):  at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4400)
E/MessageQueue-JNI(22509):  at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4378)
E/MessageQueue-JNI(22509):  at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4482)
E/MessageQueue-JNI(22509):  at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
E/MessageQueue-JNI(22509):  at android.os.MessageQueue.nativePollOnce(Native Method)
E/MessageQueue-JNI(22509):  at android.os.MessageQueue.next(MessageQueue.java:125)
E/MessageQueue-JNI(22509):  at android.os.Looper.loop(Looper.java:124)
E/MessageQueue-JNI(22509):  a
D/AndroidRuntime(22509): Shutting down VM
W/dalvikvm(22509): threadid=1: thread exiting with uncaught exception (group=0x410662a0)
E/AndroidRuntime(22509): FATAL EXCEPTION: main
E/AndroidRuntime(22509): java.lang.NullPointerException
E/AndroidRuntime(22509):    at com.google.android.maps.GestureDetector.onTouchEvent(GestureDetector.java:548)
E/AndroidRuntime(22509):    at com.google.android.maps.MapView.onTouchEvent(MapView.java:683)
E/AndroidRuntime(22509):    at android.view.View.dispatchTouchEvent(View.java:7337)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2410)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2145)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2109)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1462)
E/AndroidRuntime(22509):    at android.app.Activity.dispatchTouchEvent(Activity.java:2472)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2057)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2109)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1462)
E/AndroidRuntime(22509):    at android.app.Activity.dispatchTouchEvent(Activity.java:2472)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2057)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2416)
E/AndroidRuntime(22509):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2159)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2109)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1462)
E/AndroidRuntime(22509):    at android.app.Activity.dispatchTouchEvent(Activity.java:2472)
E/AndroidRuntime(22509):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2057)
E/AndroidRuntime(22509):    at android.view.View.dispatchPointerEvent(View.java:7520)
E/AndroidRuntime(22509):    at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3374)
E/AndroidRuntime(22509):    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3306)
E/AndroidRuntime(22509):    at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4400)
E/AndroidRuntime(22509):    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4378)
E/AndroidRuntime(22509):    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4482)
E/AndroidRuntime(22509):    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
E/AndroidRuntime(22509):    at android.os.MessageQueue.nativePollOnce(Native Method)
E/AndroidRuntime(22509):    at android.os.MessageQueue.next(MessageQueue.java:125)
E/AndroidRuntime(22509):    at android.os.Looper.loop
D/dalvikvm(22509): GC_CONCURRENT freed 1205K, 21% free 22090K/27719K, paused 5ms+4ms, total 51ms
D/dalvikvm( 2284): GC_FOR_ALLOC freed 2199K, 46% free 32415K/59399K, paused 119ms, total 119ms
E/Watchdog( 2284): !@Sync 388

Any ideas what's wrong with my code? Thanks

I'm guessing that ActivityStack activityStack is null, you should check out this video on how to debug android applications from eclipse : http://www.youtube.com/watch?v=JqHYbm9e05A — petey, Oct 22 '12 at 16:33
no, i checked that already. and thanks for the video, but i'm well aware of debugging... — Elias, Oct 23 '12 at 07:04

score 0 · Answer 1 · edited May 23 '17 at 11:56

0

Have you put PointsOfInterestActivity in your AndroidManifest.xml file? If you do not enter it, the app will crash... see this.

edited May 23 '17 at 11:56

Community

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answered Oct 22 '12 at 22:09

crocboy

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Android: NullPointer after trying to make an intent after onTab on ItemizedOverly

1 Answers1