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我正在计算需要一些时间的事情。为此，我已经创建了一个子类的AsyncTask一个内部类：AsyncTask错误困惑
private class AsyncAllPlayAll extends AsyncTask<String, Void, CharSequence>
{
StournamentDbAdapter mDbHelper;
public AsyncAllPlayAll(Context context, StournamentDbAdapter dbHelper)
{
this.mContext = context;
this.mDbHelper = dbHelper;
}
@Override
protected CharSequence doInBackground(String... tournamentRowIds)
{
Long tournamentRowId = Long.valueOf(tournamentRowIds[0]);
Tournament tournament = new Tournament(mDbHelper, tournamentRowId);
tournament.setupTournament();
Boolean tournamentHasWinner = mDbHelper.winningTournamentParticipantsExists(tournamentRowId);
// tournament already run: delete score
if(tournamentHasWinner)
{
mDbHelper.resetTournamentsStocksScore(tournamentRowId);
mDbHelper.resetTournamentWinnerStockId(tournamentRowId);
}
//run tournament!
tournament.allPlayAll();
TournamentParticipant tournamentParticipant = mDbHelper.insertWinningParticipant(tournamentRowId);
populateCompetitorsListView();
final CharSequence winner = "Winner is: " + tournamentParticipant.getStock().getName() + "(" + tournamentParticipant.getScore() + ")";
return winner;
}
@Override //the winner
protected void onPostExecute(final CharSequence result) {
super.onPostExecute(result);
final int duration = Toast.LENGTH_LONG;
TournamentEdit.this.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(mContext, "Hello", duration).show();
}
});
}
}
但我得到一个错误，我不放弃明白了：“不能内螺纹已不叫Looper.prepare创建处理程序（）“
我在stackoverflow上读了几个线程，但是实现了它们写入的内容并没有改变我的情况。
我确定错误来自于我在onPostExecute中运行的Toast，但这不是问题。该错误发起尝试初始化锦标赛。
Tournament tournament = new Tournament(mDbHelper, tournamentRowId);
这里是我的筹码：
Thread [<11> AsyncTask #1] (Suspended)
FragmentManagerImpl$1.<init>(FragmentManagerImpl) line: 423
FragmentManagerImpl.<init>() line: 423
Tournament(Activity).<init>() line: 702
Tournament.<init>(StournamentDbAdapter, Long) line: 48
TournamentEdit$AsyncAllPlayAll.doInBackground(String...) line: 346
TournamentEdit$AsyncAllPlayAll.doInBackground(Object...) line: 1
AsyncTask$2.call() line: 264
FutureTask$Sync.innerRun() line: 305
AsyncTask$3(FutureTask).run() line: 137
AsyncTask$SerialExecutor$1.run() line: 208
ThreadPoolExecutor.runWorker(ThreadPoolExecutor$Worker) line: 1076
ThreadPoolExecutor$Worker.run() line: 569
Thread.run() line: 856
我tohught它可能是一些问题与分贝线程？当我从主线程传递给AsyncAllPlayAll时。
于是，我就打开内部类的分贝线程（不同的实例），并改变了它的构造函数：
public AsyncAllPlayAll(Context context, StournamentDbAdapter dbHelper)
{
this.mContext = context;
this.mDbHelper = dbHelper;
mDbHelper = new StournamentDbAdapter(context);
mDbHelper.open();
}
这并没有帮助:(
现在我尝试添加一个尺蠖（如AsyncTask and Looper.prepare() error建议）
@Override
protected CharSequence doInBackground(String... tournamentRowIds)
{
Looper.prepare();
Long tournamentRowId = Long.valueOf(tournamentRowIds[0]);
Tournament tournament = new Tournament(mDbHelper, tournamentRowId);
tournament.setupTournament();
Boolean tournamentHasWinner = mDbHelper.winningTournamentParticipantsExists(tournamentRowId);
// tournament already run: delete score
if(tournamentHasWinner)
{
mDbHelper.resetTournamentsStocksScore(tournamentRowId);
mDbHelper.resetTournamentWinnerStockId(tournamentRowId);
}
//run tournament!
tournament.allPlayAll();
TournamentParticipant tournamentParticipant = mDbHelper.insertWinningParticipant(tournamentRowId);
populateCompetitorsListView();
final CharSequence winner = "Winner is: " + tournamentParticipant.getStock().getName() + "(" + tournamentParticipant.getScore() + ")";
Looper.loop();
return winner;
}
代码走得更远，但我得到了以下错误：
引起：android.view.ViewRootImpl $ CalledFromWrongThreadException：只有创建视图层次结构的原始线程可以触及其视图。
现在populateCompetitorsListView（）是导致飞机失事的原因，它也清楚为什么：看populateCompetitorsListView（）的最后一行，这是
setListAdapter(tournamentStocks);
试图改变主线程。我将它移到了主类中，这似乎修正了它：计算运行。
@SuppressWarnings("deprecation")
private void populateCompetitorsListView()
{
// Get all of the notes from the database and create the item list
Cursor tournamentStocksCursor = mDbHelper.retrieveTrounamentStocks(mTournamentRowId);
startManagingCursor(tournamentStocksCursor);
// Create an array to specify the fields we want to display in the list (only name)
String[] from = new String[] {StournamentConstants.TblStocks.COLUMN_NAME, StournamentConstants.TblTournamentsStocks.TBL_COLUMN_TOURNAMENTS_STOCKS_STOCK_SCORE};
// and an array of the fields we want to bind those fields to (in this case just name)
int[] to = new int[]{R.id.competitor_name, R.id.competitor_score};
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter tournamentStocks = new SimpleCursorAdapter(this, R.layout.competitor_row, tournamentStocksCursor, from, to);
//tournamentStocks.convertToString(tournamentStocksCursor);
setListAdapter(tournamentStocks);
}
但现在的问题是，我似乎被卡住内doInBackground（）由于Looper.loop（）的执行情况;这是猜测运行无止境的循环？
有没有进一步的想法？
谢谢！