我写了一个短信的小程序,其中有用到AsyncQueryHandler 这个方法,初始化短信列表的时候,一开始是可以初始化的。没什么问题,后来,待机了一会儿后,进去就报空指针错误了,信息Crash掉了这是什么原因呢?求指教。 private final class ThreadListQueryHandler extends AsyncQueryHandler {
public ThreadListQueryHandler(ContentResolver contentResolver) {
super(contentResolver);
}
} ThreadListQueryHandler mQueryHandler = new ThreadListQueryHandler(getContentResolver());
public ThreadListQueryHandler(ContentResolver contentResolver) {
super(contentResolver);
}
} ThreadListQueryHandler mQueryHandler = new ThreadListQueryHandler(getContentResolver());
public ThreadListQueryHandler(ContentResolver contentResolver) {
super(contentResolver);
} @Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) { }
}