android-在哪個線程中運行 AsyncTask？

在哪個線程中運行 AsyncTask？

應用程序的 AlertDialog.Builder(context) 中有下面的代碼。問題是在哪個線程中運行呢？

final Thread myPrettyOperation = new Thread() {
    @Override
    public void run() {
        //Do some really long operation.
    }
};
class MyPrettyTask extends
        AsyncTask<Void, Integer, Boolean> {
    protected Boolean doInBackground(
            Void... voids) {
        myPrettyOperation.start();
        return true;
    }
    protected void onProgressUpdate(
            Integer... progress) {
    }
    protected void onPostExecute(Boolean result) {
    }
}
new MyPrettyTask().execute();

最佳回答：

運行應用程序，然後檢查 logcat 輸出。線程名分別是 "Thread1:", "Thread2:", "Thread3:",當你在輸出中看見 "main" ，就是指你的 UI 線程。在其它情況下，你會看見線程的名字，例如： 是 myPrettyOperation 裡是"Thread14"。

 final Thread myPrettyOperation = new Thread() {
    @Override
    public void run() {
        Log.i("YOUR_TAG", "Thread1: "+ Thread.currentThread().getName()); 
        //Do some really long operation.
    }
};
class MyPrettyTask extends
        AsyncTask<Void, Integer, Boolean> {
    protected Boolean doInBackground(
            Void... voids) {
        Log.i("YOUR_TAG", "Thread2: "+ Thread.currentThread().getName()); 
        myPrettyOperation.start();
        return true;
    }
    protected void onProgressUpdate(
            Integer... progress) {
    }
    protected void onPostExecute(Boolean result) {
    }
}
new MyPrettyTask().execute();
Log.i("YOUR_TAG", "Thread3: "+ Thread.currentThread().getName());