DrawerLayout - Exception dispatching input event
android, android-fragments, android-layout, android-support-library, drawerlayout
Solution
I have also got this error message but at first I couldn't find out what caused it. After doing some tests I actually found out that removing all margins on the View (in your example the fragment) seems to remove the problem.
So in your case it would be:
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/item_list"
android:name="com.navdrawertest.ItemListFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ItemListActivity"
tools:layout="@android:layout/list_content" />
and you can set margins on all the views inside this fragment instead (but I haven't tested it). Hope it helps someone. It seems that this problem is not so common.
Problem
I recently started using the DrawerLayout in a new project about a week ago and it's all working fine. Apart from the odd times when swiping it in and out with my finger it'll crash. If I use the ActionBar Up/Home MenuItem though, it'll work fine every time. In LogCat i get two stacktraces that both seem to point to internal android places, so I don't quite know what to do to solve this. I just tried creating a new application to see if it was something I was doing before that was causing this, but it happened in the new application too. I created the new application with the Master/Detail Flow template in the "New Android Application" window, left everything as defaults and just changed activity_item_list.xml to have this inside it: ``` <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/drawer_layout" android:layout_width="match_parent" android:layout_height="match_parent" > <fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/item_list" android:name="com.navdrawertest.ItemListFragment" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginLeft="16dp" android:layout_marginRight="16dp" tools:context=".ItemListActivity" tools:layout="@android:layout/list_content" /> <!-- Navigation Drawer --> <ListView android:id="@+id/left_drawer" android:layout_width="240dp" android:layout_height="match_parent" android:layout_gravity="start" android:background="#111" /> </android.support.v4.widget.DrawerLayout> ``` The DrawerLayout shows and I can still drag it from the edge of the screen, but it still crashes in this test app. Here are the stacktraces I see after dragging it with my finger: ``` 07-26 09:29:45.574: E/InputEventReceiver(19085): Exception dispatching input event. 07-26 09:29:45.574: E/MessageQueue-JNI(19085): Exception in MessageQueue callback: handleReceiveCallback 07-26 09:29:45.584: E/MessageQueue-JNI(19085): java.lang.NullPointerException 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.support.v4.widget.DrawerLayout.isContentView(DrawerLayout.java:840) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.support.v4.widget.DrawerLayout.onInterceptTouchEvent(DrawerLayout.java:866) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1852) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1966) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1418) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.app.Activity.dispatchTouchEvent(Activity.java:2424) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1914) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.View.dispatchPointerEvent(View.java:7564) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3883) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3778) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5419) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5399) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5370) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5493) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:182) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.os.MessageQueue.nativePollOnce(Native Method) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.os.MessageQueue.next(MessageQueue.java:132) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.os.Looper.loop(Looper.java:124) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at android.app.ActivityThread.main(ActivityThread.java:5103) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at java.lang.reflect.Method.invokeNative(Native Method) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at java.lang.reflect.Method.invoke(Method.java:525) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 07-26 09:29:45.584: E/MessageQueue-JNI(19085): at dalvik.system.NativeStart.main(Native Method) 07-26 09:29:45.584: D/AndroidRuntime(19085): Shutting down VM 07-26 09:29:45.584: W/dalvikvm(19085): threadid=1: thread exiting with uncaught exception (group=0x41cbb700) 07-26 09:29:45.594: E/AndroidRuntime(19085): FATAL EXCEPTION: main 07-26 09:29:45.594: E/AndroidRuntime(19085): java.lang.NullPointerException 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.support.v4.widget.DrawerLayout.isContentView(DrawerLayout.java:840) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.support.v4.widget.DrawerLayout.onInterceptTouchEvent(DrawerLayout.java:866) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1852) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910) 07-26 09:29:45.594: E/AndroidRuntime(19085): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1966) 07-26 09:29:45.594: E/AndroidRuntime(19085): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1418) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.app.Activity.dispatchTouchEvent(Activity.java:2424) 07-26 09:29:45.594: E/AndroidRuntime(19085): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1914) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.View.dispatchPointerEvent(View.java:7564) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3883) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3778) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5419) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5399) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5370) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5493) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:182) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.os.MessageQueue.nativePollOnce(Native Method) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.os.MessageQueue.next(MessageQueue.java:132) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.os.Looper.loop(Looper.java:124) 07-26 09:29:45.594: E/AndroidRuntime(19085): at android.app.ActivityThread.main(ActivityThread.java:5103) 07-26 09:29:45.594: E/AndroidRuntime(19085): at java.lang.reflect.Method.invokeNative(Native Method) 07-26 09:29:45.594: E/AndroidRuntime(19085): at java.lang.reflect.Method.invoke(Method.java:525) 07-26 09:29:45.594: E/AndroidRuntime(19085): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 07-26 09:29:45.594: E/AndroidRuntime(19085): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 07-26 09:29:45.594: E/AndroidRuntime(19085): at dalvik.system.NativeStart.main(Native Method) ``` Is there something I'm missing here? Edit: 10 days in and still can't figure this out, can I at least get confirmation that this isn't just me getting this?