android-asynctask

问题 Please help, I can't dismiss ProgressDialog after AsyncTask complete. I searched for the answer but nothing found. This code works fine when I use Thread instead of AsyncTask. Have any ideas? Context appContext; ProgressDialog pd; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); appContext=this; MyTask myTask=new MyTask(); myTask.execute(); } class MyTask extends AsyncTask<Void, Void, Void> { @Override protected void onPreExecute() { pd =

问题 Working on an app in android I have used Asynctask class, Works fine when i tested on my Android device running on 2.3.5, but the problem i am facing is, same is not working for my tablet 4.0.4 While testing, got to know that prexecute() is being called but doInbackground() not being called, however doInbackground() is being called on device(2.3.5). One of the reason i believe for the problem is that the processor of Tablet is much faster than that of device, so may be some threading issues,

问题 How can an AsyncTask be started after a 3 second delay? 回答1: You can use Handler for that. Use postDelayed(Runnable, long) for that. Handler#postDelayed(Runnable, Long) 回答2: Using handlers as suggested in the other answers, the actual code is: new Handler().postDelayed(new Runnable() { @Override public void run() { new MyAsyncTask().execute(); } }, 3000); 回答3: You can use this piece of code to run after a 3 sec delay. new Timer().schedule(new TimerTask() { @Override public void run() { // run

问题 I have the following code for polling the unread notification count every X seconds from a server I start the this process via ScheduledThreadPoolExecutor in the App.onCreate() and Log.d("XXX", "Requesting Notification count from server ..."); is called once (i can see in Logcat), but neither of the two Retrofit call back functions getting called (and in fact no Retrofit debug logs). Morever, the "Requesting Notification count from server...." is never printed again (i.e. the periodic task is

问题 I have created a custom Loading Progress Dialog. And its working well. I am rotating 12 square Images here is one of them But when I want to use it with AsynTask, The animation not working. My Sample code is below. Activity Where I Start Loading... Animation and Stop. MainActivity.java public class MainActivity extends Activity { AnimationDrawable loadingViewAnim; TextView loadigText; ImageView loadigIcon; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate

问题 I have created a custom Loading Progress Dialog. And its working well. I am rotating 12 square Images here is one of them But when I want to use it with AsynTask, The animation not working. My Sample code is below. Activity Where I Start Loading... Animation and Stop. MainActivity.java public class MainActivity extends Activity { AnimationDrawable loadingViewAnim; TextView loadigText; ImageView loadigIcon; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate

问题 I want to know about What is the use of List<NameValuePair> or ArrayList<NameValuePair> in android? Specially when we are using web services using AsyncTask<...> 回答1: NameValuePair is a special <Key, Value> pair which is used to represent parameters in http request, i.e. www.example.com?key=value . NameValuePair is an interface and is defined in apache http client, which is widely used in java to handle http operations. A List<NameValuePair> is just a list of <key, value> pairs, and will be

问题 i want to do it which the progress dialog waits the loading item on webview . How can i do it which dialog.dismiss() event depend on loading item on webview ? public class asynctask extends AsyncTask<Void, Void, Void> { private ProgressDialog dialog = new ProgressDialog(WebActivity.this); @Override protected void onPostExecute(Void result) { // TODO Auto-generated method stub in there how can i do it ?? dialog.dismiss(); dialog disappear without waiting } @Override protected void onPreExecute

问题 i want to do it which the progress dialog waits the loading item on webview . How can i do it which dialog.dismiss() event depend on loading item on webview ? public class asynctask extends AsyncTask<Void, Void, Void> { private ProgressDialog dialog = new ProgressDialog(WebActivity.this); @Override protected void onPostExecute(Void result) { // TODO Auto-generated method stub in there how can i do it ?? dialog.dismiss(); dialog disappear without waiting } @Override protected void onPreExecute

问题 I'm trying to get back JSON object in the following way: JSONObject jsonObject = http.makeRequest("GET", "https://api.twitter.com/1.1/search/tweets.json", null); General method for processing all HTTP requests is following public void makeRequest(String method, String url, Array params) { // Request a string response from the provided URL. JsonObjectRequest jsonObjReq = new JsonObjectRequest(getRequestMethod(method), url, new Response.Listener<JSONObject>() { @Override public void onResponse