RecyclerView的bug——Inconsistency detected
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bug重现的方法
使用 RecyclerView 加SwipeRefreshLayout下拉刷新的时候,如果绑定的 List 对象在更新数据之前进行了 clear,而这时用户紧接着迅速上滑 RecyclerView,就会造成崩溃,而且异常不会报到我们的代码上,属于RecyclerView内部错误。
可能的原因
当 clear 了 list 之后,这时迅速上滑,而新数据还没到来,导致 RecyclerView 要更新加载下面的 Item 时候,找不到数据源了,造成 crash,就会报以下错误
java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 157(offset:157).state:588 at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3300) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3258) at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1803) at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1302) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1265) at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1093) at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:956) at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:2715) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725) at android.view.Choreographer.doCallbacks(Choreographer.java:555) at android.view.Choreographer.doFrame(Choreographer.java:524) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711) at android.os.Handler.handleCallback(Handler.java:615) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4921) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794) at dalvik.system.NativeStart.main(Native Method)
解决方法
在刷新时,也就是 clear 的同时,让 RecyclerView 暂时不能够滑动,之后再允许滑动即可。代码就是在 RecyclerView 初始化的时候加上是否在刷新进而拦截手势,需要一个布尔型变量判断是否正在刷新,在刷新时设置为true,刷新完毕后设置为false,相关代码如下
private boolean mIsRefreshing=false;mRecyclerView.setOnTouchListener( new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if (mIsRefreshing) { return true; } else { return false; } } });//当刷新时设置//mIsRefreshing=true;//刷新完毕后还原为false//mIsRefreshing=false;
总结
显然进制滑动不明智,但是在没找到其他方式解决之前,这也不失为一个办法。
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