progressdialog

问题 **Updated: (See below)**I have been looking around for couple of days and can't find a straight answer to this. Some say it possible to some say to accomplish some say it's not. I am getting crazy on this. What I want is just to have the AsyncTaskTask showing a progressbar an external class. To do this I am passing the context as you can see in the main class. But whatever I try I get NullPointerException . Working code examples is appreciated. Thank you Using Android 2.2 by the way. main:

问题 I want to parse a webpage and visual a progressdialog style horizontal and increment it byte to byte, it's possibile ? 回答1: Try something like this, Create a ProgressDialog. ProgressDialog mProgressDialog = new ProgressDialog(Your_Activity.this); mProgressDialog.setMessage("Here you can set a message"); mProgressDialog.setIndeterminate(false); mProgressDialog.setMax(100); mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); mProgressDialog.show(); MyAsyncTask obj = new

问题 I have an application that does some long calculations, and I would like to show a progress dialog while this is done. So far I have found that I could do this with threads/handlers, but didn't work, and then I found out about the AsyncTask . In my application I use maps with markers on it, and I have implemented the onTap function to call a method that I have defined. The method creates a dialog with Yes/No buttons, and I would like to call an AsyncTask if Yes is clicked. My question is how

问题 In a long-running operation, I'm showing a popup dialog (created from ProgressDialog to prevent other operations from happening). I have made it non-cancellable with setCancelable(false) , so I can't close it using the back button, but surprisingly, the Search hardware button dismisses the dialog! More exactly, the global search application is displayed, and when I come back to my app, the dialog has been dismissed. Any idea how to prevent the dialog from being dismissed? 回答1: This works

问题 How do you display a progress dialog before starting an activity (i.e., while the activity is loading some data) in Android? 回答1: You should load data in an AsyncTask and update your interface when the data finishes loading. You could even start a new activity in your AsyncTask's onPostExecute() method. More specifically, you will need a new class that extends AsyncTask: public class MyTask extends AsyncTask<Void, Void, Void> { public MyTask(ProgressDialog progress) { this.progress = progress

问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Updating progress dialog in Activity from AsyncTask I am developing my first Android App and I need a ProgressDialog to be showed while a background task, in this case just a http call on the server, happens. I did a bit of studying on this and also have already checked other threads related to this subject. http://developer.android.com/reference/android/os/AsyncTask.html Android show ProgressDialog until

问题 In my app I am doing some intense work in AsyncTask as suggested by Android tutorials and showing a ProgressDialog in my main my activity: dialog = ProgressDialog.show(MyActivity.this, "title", "text"); new MyTask().execute(request); where then later in MyTask I post results back to activity: class MyTask extends AsyncTask<Request, Void, Result> { @Override protected Result doInBackground(Request... params) { // do some intense work here and return result } @Override protected void

问题 I want to show progress of some JSON parsing using with progress bar. I've never used it and found some examples in the Internet. So, I try to realize it but application crashes when parsing starts. Here is code: public class Parser extends Activity { public static String w_type1 = "news"; public static String w_type2 = "events_put"; public ListView lv; ArrayList<Widget> data = new ArrayList<Widget>(); WidgetAdapter wid_adptr = new WidgetAdapter(this, data); @Override protected void onCreate

问题 This is my list view adapter in which I am sending listview data to server ans sqlite on the button clock asyn task. I want to use a progress dialog but I'm having problem while passing the activity's instance and my code crashes on the progress dialog. public class PlannningListViewAdapter extends BaseAdapter{ Context context; public ArrayList<Planning> planArraylist; private static LayoutInflater inflater = null; public PlanningList_activity planActivity; public ListView mListview; Db

问题 I just about got this, but I have a small problem in the order of things going off. Specifically, in my thread() I am setting up an array that is used by a Spinner. Problem is the Spinner is all set and done basically before my thread() is finished, so it sets itself up with a null array. How do I associate the spinners ArrayAdapter with an array that is being loaded by another thread? I've cut the code down to what I think is necessary to understand the problem, but just let me know if more