从在UI线程中运行代码的观点来看，在以下两种情况下有什么不同:
MainActivity.this.runOnUiThread(new Runnable() {
public void run() {
Log.d("UI thread", "I am the UI thread");
}
});
或
MainActivity.this.myView.post(new Runnable() {
public void run() {
Log.d("UI thread", "I am the UI thread");
}
});
和
private class BackgroundTask extends AsyncTask<String, Void, Bitmap> {
protected void onPostExecute(Bitmap result) {
Log.d("UI thread", "I am the UI thread");
}
}