Cannot get ProgressDialog to display in Thread

Well I've seen a wide variety of failures while trying to get this to work. I have a thread that is started via an Activity. The thread needs to create/display progress dialogs and dismiss them.

When I tried to directly display the ProgressDialog I got an error that my Looper wasn't prepared. I looked up with a Looper was an implemented it. However, I had to c开发者_Python百科all Looper.loop for the progress dialog to show up. After it showed up the application froze on that point never to continue past the Looper.loop call.

I couldn't get it to work so looked for a whole new way using a HandlerThread and a Handler. I create a HandlerThread and start it. I get the looper from the thread and create a Handler with it. My ProgressDialog or Toasts won't show up at all.

Is there an easier way to go about doing this?

U can have an

private Handler stopProgressHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {         
        setProgressBarIndeterminateVisibility(false);
    }
};
private Handler startProgressHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {         
        setProgressBarIndeterminateVisibility(true);
    }
};

so that when u start the thread start the progressbar and after thread is completed u can stop the progressbar.

 public void closeProgressbar(){
    //bluetoothconnector.onDestroy();
    stopProgressHandler.sendEmptyMessage(0);
 }
public void openProgressbar(){
    //bluetoothconnector.onDestroy();
    startProgressHandler.sendEmptyMessage(0);
 }

This will help to call the progressbar to start and stop.. This will be one of the solution..

Not sure about ProgressDialog, but all UI related stuff in Android, as far as I know, required to be updated in UI Thread. There's actually an easy helper class for implementing async task: http://developer.android.com/reference/android/os/AsyncTask.html

Alternatively, you can create a Handler (which would be on UI Thread) and create the dialog using that:

Handler uiHandler;
//Activity onCreate
onCreate(...){
    uiHandler = new Handler();
}

// Somewhere in your other thread, 
uiHandler.postRunnable(new Runnable(){
    @Override
    public void run(){
       // Create or update dialog
       ...
    }
});

The last answer is wrong....

it should be:

setProgressBarIndeterminateVisibility(Boolean.TRUE | Boolean.FALSE);