我有一个数组列表，它的大小为 1，但是当我到达索引 0 时，我得到 = java.lang.IndexOutOfBoundsException: Index: 0, Size: 0

Question

@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
    VideoTask videoTask =  new VideoTask(paccakModel, childPosition, video);
    videoTask.execute();

    ArrayList<VideoModelXml> test = videoTask.getVideoModelXmls();
    test.get(0);

   video.setVideoPath(test.get(0).getUrlVideo());
   video.start();
    return true;
}

I have an arraylist and its size is 1, but when i get at index 0, i get = java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 can anybody tell me, what is going on?

Answer 1

The reason for your issue is videoTask.getVideoModelXmls() returns nothing. It should be empty. If you want to avoid the crash

ArrayList<VideoModelXml> test = videoTask.getVideoModelXmls();
if (test .size() > 0){
test.get(0);

   video.setVideoPath(test.get(0).getUrlVideo());
   video.start();
}

Which will avoid your crash.