I have a recyclerView made up of Folding cells.
(library can be found here: https://github.com/Ramotion/folding-cell-android
each element in the recyclerView can be clicked on and it will unfold like a paper. onBindViewHolder has a condition to check whether an element coming on screen, was previously folded or unfolded so the state of the cell can be viewed correctly:
public class FoldingCellListAdapter extends RecyclerView.Adapter<FoldingCellListAdapter.ViewHolder> {
@NonNull
@Override
public FoldingCellListAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// Inflate the folding cell layout for each individual adapter element on screen
FoldingCell cellView = (FoldingCell) LayoutInflater.from(parent.getContext())
.inflate(R.layout.layout_elements, parent, false);
// passing the current infalted element to a holder
ViewHolder viewHolder = new ViewHolder(cellView);
// bind a click listener to the folding cell
viewHolder.bind(onCardClickListener);
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull FoldingCellListAdapter.ViewHolder holder, int position) {
Log.i(TAG, "bind view " + position);
// to set some text and images to the element
bindLocationData(holder, position);
// if this cell was previously opened/unfolded
if (unfoldedIndexes.contains(position)) {
//unfold it without animation to appear instantly unfolded
holder.cell.unfold(true);
} else {
holder.cell.fold(true);
}
}
}
Then I run the code to view the elements in the recyclerview. Then I click on the first element so the cell is unfolded. Everything works uptill now.
If I then scroll upwards to remove the unfolded first element out of the screen, then I instantly try to bring it back on the screen , the below error occurs:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.fcellTest, PID: 7731
java.lang.IllegalArgumentException: width and height must be > 0
at android.graphics.Bitmap.createBitmap(Bitmap.java:1113)
at android.graphics.Bitmap.createBitmap(Bitmap.java:1080)
at android.graphics.Bitmap.createBitmap(Bitmap.java:1030)
at android.graphics.Bitmap.createBitmap(Bitmap.java:991)
at com.ramotion.foldingcell.FoldingCell$override.measureViewAndGetBitmap(FoldingCell.java:362)
at com.ramotion.foldingcell.FoldingCell$override.access$dispatch(Unknown Source:260)
at com.ramotion.foldingcell.FoldingCell.measureViewAndGetBitmap(Unknown Source:23)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.tools.ir.runtime.AndroidInstantRuntime.invokeProtectedMethod(AndroidInstantRuntime.java:143)
at com.ramotion.foldingcell.FoldingCell$override.unfold(FoldingCell.java:135)
at com.ramotion.foldingcell.FoldingCell$override.access$dispatch(Unknown Source:277)
at com.ramotion.foldingcell.FoldingCell.unfold(Unknown Source:20)
at adapters.FoldingCellListAdapter.onBindViewHolder(FoldingCellListAdapter.java:139)
at adapters.FoldingCellListAdapter.onBindViewHolder(FoldingCellListAdapter.java:119)
at adapters.FoldingCellListAdapter.onBindViewHolder(FoldingCellListAdapter.java:24)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6823)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5752)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6019)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at androidx.recyclerview.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1331)
at androidx.recyclerview.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:1075)
at androidx.recyclerview.widget.RecyclerView.scrollStep(RecyclerView.java:1832)
at androidx.recyclerview.widget.RecyclerView.scrollByInternal(RecyclerView.java:1927)
at androidx.recyclerview.widget.RecyclerView.onTouchEvent(RecyclerView.java:3187)
at android.view.View.dispatchTouchEvent(View.java:13417)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3054)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2741)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:460)
E/AndroidRuntime: at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1849)
at android.app.Activity.dispatchTouchEvent(Activity.java:3974)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:418)
at android.view.View.dispatchPointerEvent(View.java:13676)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5479)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5282)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4785)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4838)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4804)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4944)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4812)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5001)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4785)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4838)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4804)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4812)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4785)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7502)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7471)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7432)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7627)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:188)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:178)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7578)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7651)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966)
at android.view.Choreographer.doCallbacks(Choreographer.java:790)
at android.view.Choreographer.doFrame(Choreographer.java:718)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:951)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7319)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:934)
The strange part is that this error does not occur if, after unfolding the first element, I keep scrolling down to the 9th element and then scroll back up to the first one again. The error disappears and the first element is shown unfolded as expected.
The problems seems to be with the FoldingCell Library invoking the getMeasuredWidth() when the unfold(true) method is called.
how can I solve this problem? I also downloaded the library since I believe the bug might be in the library itself but as far as I have searched online, no one has found the solution yet even though the problem occurs for other people as well.
(It seems that the library was not tested well with RecyclerView)