问在执行AsyncTask之前，是否可以限制ViewFlipper翻转？

EN

private class MyAsyncTask extends AsyncTask<Integer, Integer, Integer[]> {
    private ProgressDialog myWait = null;

    // This is on the UI thread itself
    protected void onPreExecute() {
        myWait  = new ProgressDialog(MainActivity.this);
        myWait.setMessage("Loading data, please wait");
        myWait.setCancelable(false);
        myWait.show();
    }

    // Separate worker thread is used here 
    protected Integer[] doInBackground(Integer...params) {
        //do the database loading
        return <your result - goes to onPostExecute>;
    }

    // This is on the UI thread itself
    protected void onPostExecute(Integer[] resultCell) {
        if (myWait  != null) {
            myWait.dismiss();
        }
    }
}

progressDiaolg=ProgressDialog.show(Activity.this,"","Loading Images...");
 final Thread t=    new Thread(new Runnable() {
                            public void run() {
                                Log.i("Inside Thread", "Downloading Images...");

                                downloadImages();

                              handler.sendEmptyMessage(0);

                            }

                        });
    t.start();
    handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {

            try {

                progressDiaolg.dismiss();
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            }
        }

    };