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JimiSmith / PinnedHeaderListView

A ListView with pinned section headers for Android
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NullPointerException OnScroll #29

Open IngLP opened 9 years ago

IngLP commented 9 years ago

Hi, I implemented this library in my project and i recieve a lot (!) of error reports all like this:

Stack trace: java.lang.NullPointerException at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:578) at android.view.View.measure(View.java:16831) at PinnedHeaderListView.ensurePinnedHeaderLayout(PinnedHeaderListView.java:138) at PinnedHeaderListView.getSectionHeaderView(PinnedHeaderListView.java:121) at PinnedHeaderListView.onScroll(PinnedHeaderListView.java:85) at android.widget.AbsListView.invokeOnItemScrollListener(AbsListView.java:1757) at android.widget.ListView.layoutChildren(ListView.java:1774) at android.widget.AbsListView.onLayout(AbsListView.java:2447) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.support.v7.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:502) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531) at android.widget.LinearLayout.onLayout(LinearLayout.java:1440) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677) at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1666) at android.widget.LinearLayout.onLayout(LinearLayout.java:1442) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531) at android.widget.LinearLayout.onLayout(LinearLayout.java:1440) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:15204) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2260) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2007) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1249) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6364) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:791) at android.view.Choreographer.doCallbacks(Choreographer.java:591) at android.view.Choreographer.doFrame(Choreographer.java:561) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:777) at android.os.Handler.handleCallback(Handler.java:730) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:176) at android.app.ActivityThread.main(ActivityThread.java:5419) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862) at dalvik.system.NativeStart.main(Native Method)

I can't figure it out. It never happened to me. Is this a library bug? Is this a problem of mine? Any hints where it can be? Thanks!

rinfon commented 9 years ago

try this.

private void ensurePinnedHeaderLayout(View header) { if (header.isLayoutRequested()) { int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), mWidthMode); int heightSpec; ViewGroup.LayoutParams layoutParams = header.getLayoutParams(); if (layoutParams != null && layoutParams.height > 0) { heightSpec = MeasureSpec.makeMeasureSpec(layoutParams.height, MeasureSpec.EXACTLY); } else { heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); } header.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, heightSpec)); header.measure(widthSpec, heightSpec); header.layout(0, 0, header.getMeasuredWidth(), header.getMeasuredHeight()); } }

in PinnedHeaderListView.