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Created by akwizgran@akwizgranOwner

NPE when scrolling in ConversationActivity

  • Android version: 6.0
  • Phone model: Huawei DIG-L21HN
  • Briar version: 1.1.6 (4d26628f)

Stacktrace:

java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
        at org.briarproject.briar.android.view.BriarRecyclerViewScrollListener.onItemVisible(BriarRecyclerViewScrollListener.java:55)
        at org.briarproject.briar.android.view.BriarRecyclerViewScrollListener.onItemsVisible(BriarRecyclerViewScrollListener.java:50)
        at org.briarproject.briar.android.view.BriarRecyclerViewScrollListener.onScrolled(BriarRecyclerViewScrollListener.java:39)
        at android.support.v7.widget.RecyclerView.dispatchOnScrolled(RecyclerView.java:4961)
        at android.support.v7.widget.RecyclerView.dispatchLayoutStep3(RecyclerView.java:4021)
        at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3652)
        at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:4194)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.support.constraint.ConstraintLayout.onLayout(ConstraintLayout.java:1915)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1764)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1607)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1516)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1764)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1607)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1516)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1764)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1607)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1516)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
        at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2757)
        at android.view.View.layout(View.java:16772)
        at android.view.ViewGroup.layout(ViewGroup.java:5462)
        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2234)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1991)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1147)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6262)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:886)
        at android.view.Choreographer.doCallbacks(Choreographer.java:698)
        at android.view.Choreographer.doFrame(Choreographer.java:633)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:872)
        at android.os.Handler.handleCallback(Handler.java:743)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:150)
        at android.app.ActivityThread.main(ActivityThread.java:5659)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:822)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:712)

Edited log:

11-24 10:18:33.863 I/AndroidNetworkManager: Received broadcast android.intent.action.SCREEN_ON
11-24 10:18:42.475 I/BaseActivity: Starting ConversationActivity
11-24 10:18:42.513 I/ConversationActivity: Eagerly loading text for latest message
11-24 10:18:47.418 I/KeyboardAwareLinearLayout: onKeyboardOpen(438)
11-24 10:19:29.081 I/BaseActivity: Stopping ConversationActivity
11-24 10:19:29.274 I/BaseActivity: Starting ConversationActivity
11-24 10:19:29.292 I/ConversationActivity: Eagerly loading text for latest message
11-24 10:19:33.838 I/BaseActivity: Stopping ConversationActivity
11-24 10:19:33.983 I/BaseActivity: Starting ConversationActivity
11-24 10:19:34.003 I/ConversationActivity: Eagerly loading text for latest message
11-24 10:19:35.200 I/KeyboardAwareLinearLayout: onKeyboardOpen(926)

Notes:

  • Object#getClass() is the desugared implementation of Objects.requireNonNull()
  • Possible interaction between automatically scrolling to the bottom of the conversation and opening the keyboard?
  • Old Briar version - KeyboardAwareLinearLayout has been removed, we've moved to the AndroidX implementation of ConstraintLayout
  • Considering the old Briar version I'm not adding this to the current milestone unless we get another report