Got ArrayIndexOutOfBoundsException while scrolling RecyclerView with GridLayoutManager
I am using RecyclerView
(com.android.support:recyclerview-v7:21.0.2) with GridLayoutManager
and applying dynamic column. When the view is scrolled, an exception is thrown. The error seems to be thrown when it RecyclerView
is about to display items that were not previously displayed (reuse or relink). However, if I don't use such a dynamic column / column number, or just comment out the calling line GridLayoutManager.setSpanCount
, this won't happen.
I tried to check the source code , it looks like the problem is with the temporary array mSet
.
E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.ArrayIndexOutOfBoundsException
at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:361)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1269)
at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1097)
at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:957)
at android.support.v7.widget.RecyclerView.scrollByInternal(RecyclerView.java:985)
at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:1686)
at android.view.View.dispatchTouchEvent(View.java:3885)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:903)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1691)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1125)
at android.app.Activity.dispatchTouchEvent(Activity.java:2096)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1675)
at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2194)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1878)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
How do I solve this so that I have a dynamic number grid? Thank.
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My workaround for this problem is to adjust the mSet size. This has extended the GridLayoutManager.
package android.support.v7.widget;
import android.content.Context;
import android.view.View;
public class MyGridLayoutManager extends GridLayoutManager {
public MyGridLayoutManager(Context context, int spanCount) {
super(context, spanCount);
}
public MyGridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout) {
super(context, spanCount, orientation, reverseLayout);
}
@Override
public void setSpanCount(int spanCount) {
super.setSpanCount(spanCount);
if (mSet != null && mSet.length != spanCount) {
View[] newSet = new View[spanCount];
System.arraycopy(mSet, 0, newSet, 0, Math.min(mSet.length, spanCount));
mSet = newSet;
}
}
}
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