如何防止Greedo访问超出范围的索引?
以下是堆栈跟踪:
---------崩溃的开始
12-28 17:19:22.338 8668-8668 / com.pixerf.android E / AndroidRuntime:FATAL EXCEPTION:main 过程:com.pixerf.android,PID:8668 java.lang.IndexOutOfBoundsException:索引:56,大小:56 at java.util.ArrayList.get(ArrayList.java:411) 在com.fivehundredpx.greedolayout.GreedoLayoutSizeCalculator.sizeForChildAtPosition(GreedoLayoutSizeCalculator.java:71) 在com.fivehundredpx.greedolayout.GreedoLayoutManager.sizeForChildAtPosition(GreedoLayoutManager.java:282) 在com.fivehundredpx.greedolayout.GreedoLayoutManager.preFillGrid(GreedoLayoutManager.java:206) 在com.fivehundredpx.greedolayout.GreedoLayoutManager.onLayoutChildren(GreedoLayoutManager.java:122) 在android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3719) 在android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3436) 在android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3988) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.support.v4.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:611) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.support.v4.view.ViewPager.onLayout(ViewPager.java:1769) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:132) 在android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) 在android.support.design.widget.AppBarLayout $ ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1361) 在android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:874) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) 在android.widget.FrameLayout.onLayout(FrameLayout.java:261) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741) 在android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585) 在android.widget.LinearLayout.onLayout(LinearLayout.java:1494) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) 在android.widget.FrameLayout.onLayout(FrameLayout.java:261) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741) 在android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585) 在android.widget.LinearLayout.onLayout(LinearLayout.java:1494) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.widget.FrameLayout.layoutChildren(FrameLayout.java:323) 在android.widget.FrameLayout.onLayout(FrameLayout.java:261) 在com.android.internal.policy.DecorView.onLayout(DecorView.java:724) 在android.view.View.layout(View.java:17523) 在android.view.ViewGroup.layout(ViewGroup.java:5612) 在android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2342) 在android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2069) 在android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1246) 在android.view.ViewRootImpl $ TraversalRunnable.run(ViewRootImpl.java:6301) 在android.view.Choreographer $ CallbackRecord.run(Choreographer.java:871) 在android.view.Choreographer.doCallbacks(Choreographer.java:683) 在android.view.Choreographer.doFrame(Choreographer.java:619) 在android.view.Choreographer $ FrameDisplayEventReceiver.run(Choreographer.java:857) 在android.os.Handler.handleCallback(Handler.java:751) 12-28 17:19:22.339 8668-8668 / com.pixerf.android E / AndroidRuntime:at android.os.Handler.dispatchMessage(Handler.java:95) 在android.os.Looper.loop(Looper.java:154) 在android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) 在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:866) 在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
答案 0 :(得分:0)
检查你的arraylist或数组大小,然后执行你的任务
if(arraylist.size()>0)
{
//do something
}