Android - how to hide / show progressbar onclick

Question

I am trying to show a progressbar when a button is clicked. When i test the app it force closes / stops. My app works fine before the progressbar code is added in.

also

Answer 1

try this way, i am not sure it will help you or not

b1.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        final ProgressDialog progress = ProgressDialog.show(THENAMEOFYOURACTIVITYCLASS.this,
                ProgressTitle, ProgressMessage, true, false);

        new Thread(new Runnable() {
            public void run() {
            loadFeed();
            progress.cancel();
            }
        }).start();
    }
});

Be careful about what loadFeed(statutory); do. Because now is working inside a THREAD and Threads con not modify UI, If this is the case then you should do something like this:

b1.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        final ProgressDialog progress = ProgressDialog.show(THENAMEOFYOURACTIVITYCLASS.this,
                ProgressTitle, ProgressMessage, true, false);

        new Thread(new Runnable() {
            public void run() {
            loadFeed(); //just load data and prepare the model
            runOnUiThread(new Runnable() {
                             @Override public void run() {
                               //here you can modify UI here
                               //modifiying UI element happen here and at the end you cancel the progress dialog
                               progress.cancel();
                         }
                    }); // runOnUIthread

            }
        }).start();
    }
});