问AsyncTask中未调用onPostExecute (处理程序运行时异常)

EN

I/My App(  501): doInBackground exiting
W/MessageQueue(  501): Handler{442ba140} sending message to a Handler on a dead thread
W/MessageQueue(  501): java.lang.RuntimeException: Handler{442ba140} sending message to a Handler on a dead thread
W/MessageQueue(  501):  at android.os.MessageQueue.enqueueMessage(MessageQueue.java:179)
W/MessageQueue(  501):  at android.os.Handler.sendMessageAtTime(Handler.java:457)
W/MessageQueue(  501):  at android.os.Handler.sendMessageDelayed(Handler.java:430)
W/MessageQueue(  501):  at android.os.Handler.sendMessage(Handler.java:367)
W/MessageQueue(  501):  at android.os.Message.sendToTarget(Message.java:348)
W/MessageQueue(  501):  at android.os.AsyncTask$3.done(AsyncTask.java:214)
W/MessageQueue(  501):  at java.util.concurrent.FutureTask$Sync.innerSet(FutureTask.java:252)
W/MessageQueue(  501):  at java.util.concurrent.FutureTask.set(FutureTask.java:112)
W/MessageQueue(  501):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:310)
W/MessageQueue(  501):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
W/MessageQueue(  501):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
W/MessageQueue(  501):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
W/MessageQueue(  501):  at java.lang.Thread.run(Thread.java:1096)

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState); // Call the parent

    setContentView(R.layout.main); // Create the UI from the XML file

    // Find the UI elements
    controls = (SlidingDrawer) findViewById(R.id.drawer); // Contains the
    // buttons
    // comic = (ImageView) findViewById(R.id.comic); // Displays the comic
    subtitle = (TextView) findViewById(R.id.subtitleTxt); // Textbox for the
    // subtitle
    prevBtn = (Button) findViewById(R.id.prevBtn); // The previous button
    nextBtn = (Button) findViewById(R.id.nextBtn); // The next button
    randomBtn = (Button) findViewById(R.id.randomBtn); // The random button
    fetchBtn = (Button) findViewById(R.id.comicFetchBtn); // The go to specific id button
    mostRecentBtn = (Button) findViewById(R.id.mostRecentBtn); // The button to go to the most recent comic
    comicNumberEdtTxt = (EditText) findViewById(R.id.comicNumberEdtTxt); // The text box to Zooming image view setup
    zoomControl = new DynamicZoomControl();

    zoomListener = new LongPressZoomListener(this);
    zoomListener.setZoomControl(zoomControl);

    zoomComic = (ImageZoomView) findViewById(R.id.zoomComic);
    zoomComic.setZoomState(zoomControl.getZoomState());
    zoomComic.setImage(BitmapFactory.decodeResource(getResources(), R.drawable.defaultlogo));
    zoomComic.setOnTouchListener(zoomListener);

    zoomControl.setAspectQuotient(zoomComic.getAspectQuotient());

    resetZoomState();

    // enter the new id
    imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); // Used to hide the soft keyboard

    Log.i(LOG_TAG, "beginning loading of first comic");
    int notificationComicNumber = getIntent().getIntExtra("comic", -1);
    Log.i(LOG_TAG, "comic number from intent: " + notificationComicNumber);
    if (notificationComicNumber == -1) {
        fetch = new MyFetcher(this, zoomComic, subtitle, controls, comicNumberEdtTxt, imm, zoomControl);
        fetch.execute(MyFetcher.LAST_DISPLAYED_COMIC);
    } else {
        fetch = new MyFetcher(this, zoomComic, subtitle, controls, comicNumberEdtTxt, imm, zoomControl);
        fetch.execute(notificationComicNumber);
        ((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).cancelAll();
    }
    Log.i(LOG_TAG, "ending loading of new comic");

    Log.i(LOG_TAG, "first run checks beginning");
    // Get SharedPreferences
    prefs = getSharedPreferences("prefs", Context.MODE_PRIVATE);

    // Check if this is the first run of the app for this version
    if (prefs.getBoolean("firstRun-" + MAJOR_VERSION_NUMBER, true)) {
        prefs.edit().putBoolean("firstRun-" + MAJOR_VERSION_NUMBER, false).commit();
        firstRunVersionDialog();
    }

    // Check if this is the first run of the app
    if (prefs.getBoolean("firstRun", true)) {
        prefs.edit().putBoolean("firstRun", false).commit();
        firstRunDialog();
    }
    Log.i(LOG_TAG, "First run checks done");

            // OnClickListener s for the buttons omitted to save space

msg.target = this;
sent = queue.enqueueMessage(msg, uptimeMillis);

    final boolean enqueueMessage(Message msg, long when) {
        if (msg.when != 0) {
            throw new AndroidRuntimeException(msg
                    + " This message is already in use.");
        }
        if (msg.target == null && !mQuitAllowed) {
            throw new RuntimeException("Main thread not allowed to quit");
        }
        synchronized (this) {
            if (mQuiting) {
                RuntimeException e = new RuntimeException(
                    msg.target + " sending message to a Handler on a dead thread");
                Log.w("MessageQueue", e.getMessage(), e);
                return false;
            } else if (msg.target == null) {
                mQuiting = true;
            }

            msg.when = when;
            //Log.d("MessageQueue", "Enqueing: " + msg);
            Message p = mMessages;
            if (p == null || when == 0 || when < p.when) {
                msg.next = p;
                mMessages = msg;
                this.notify();
            } else {
                Message prev = null;
                while (p != null && p.when <= when) {
                    prev = p;
                    p = p.next;
                }
                msg.next = prev.next;
                prev.next = msg;
                this.notify();
            }
        }
        return true;
    }