Question

我正在调试我的应用程序，打开它，突然它无缘无故地崩溃了。它运行良好几分钟。通常情况下，这不会成为一个问题，因为崩溃日志会有所帮助，但这次崩溃日志毫无用处。也许你可以在这里看到为什么它会崩溃？

    java.lang.IndexOutOfBoundsException: Invalid index 302, size is 0
        at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
        at java.util.ArrayList.get(ArrayList.java:308)
        at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:337)
        at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:390)
        at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
        at android.widget.AbsListView.obtainView(AbsListView.java:2347)
        at android.widget.ListView.makeAndAddView(ListView.java:1864)
        at android.widget.ListView.fillUp(ListView.java:732)
        at android.widget.ListView.correctTooHigh(ListView.java:1421)
        at android.widget.ListView.fillSpecific(ListView.java:1359)
        at android.widget.ListView.layoutChildren(ListView.java:1651)
        at android.widget.AbsListView.onLayout(AbsListView.java:2151)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1043)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:494)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
        at android.view.View.layout(View.java:15671)
        at android.view.ViewGroup.layout(ViewGroup.java:5038)
        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2086)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
        at android.view.Choreographer.doCallbacks(Choreographer.java:580)
        at android.view.Choreographer.doFrame(Choreographer.java:550)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

这就是我将适配器添加到我认为受影响的ListView的方式

    msgs = new CircularArray<Message>(helper.getAllMessages(), MSG_STACK_SIZE);
    if (msgs.getSize() > 0){
        sortedMessages.clear();
        sortedMessages.addAll(msgs.getAllSorted());
        createAdapter();
    }
    setListAdapter(adapter);

sortedMessages是一个传递给createAdapter中适配器构造函数的字段。我还在从另一个线程调用的侦听器中修改该列表：

    public void onNewMessage(Message msg) {
        msgs.add(msg);
        helper.insertMessage(msg);

        sortedMessages.clear();
        sortedMessages.addAll(msgs.getAllSorted());
        ChatFragment.this.getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                adapter.notifyDataSetChanged();
                setSelection(adapter.getCount() - 1);
            }
        });
    }

Answer 1

当listview正在绘制时，适配器中的arraylist似乎发生了变化，你应该在适配器的任何地方调用notifyDatasetChanges。

关于代码的代码段：你不应该从多个线程更新列表，从ui线程对列表进行所有更新并通知适配器，就像你将避免在适配器获取列表的视图时更改列表

数组在android中的界限无缘无故

1 个答案: