Crash分析

protected void onResume() {
super.onResume();
List<AppItemInfo> list = mData.getData();
mList = list;
final MyAdapter ad = new MyAdapter(this, list);
mLv.setAdapter(ad);
new Thread() {
public void run() {
SystemClock.sleep(20);
mList.remove(0);
SystemClock.sleep(120);
ad.notifyDataSetChanged();
}
}.start();
}