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我只是在Android中嘗試異步任務。AsyncQuery處理程序線程何時結束?
它可以工作,但是什麼時候該任務對應的線程被殺死?
當我在DDMS中檢查它仍處於等待狀態。
下面是我工作的代碼。
ThreadListQueryHandler mQueryHandler = new ThreadListQueryHandler(getContentResolver());
startAsyncQuery();
private void startAsyncQuery()
{
try
{
setTitle("Refreshing");
setProgressBarIndeterminateVisibility(true);
Conversation.startQueryForAll(mQueryHandler,QUERY_THREAD_LIST_ALL);
}
catch (SQLException e) {
Log.e("Event", "Catch a SQLiteException when query: ", e); }
}
public class ThreadListQueryHandler extends AsyncQueryHandler{
public ThreadListQueryHandler(ContentResolver contentresolver) {
super(contentresolver);
}
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
setTitle("Complete");
setProgressBarIndeterminateVisibility(false);
cursor.moveToFirst();
switch (token) {
case QUERY_THREAD_LIST_ALL:
Toast.makeText(context,""+cursor.getCount(),Toast.LENGTH_SHORT).show(); break;
}
}