Display loading dialog while running method in Android?

Question

I have a method setup that takes about 3-5 seconds to run (because it does something online) and I would like to show a loading dialog, but I cant figure out how to do it, I tried starting the loading dialod before I called the method then tried to dismiss it right after like this:

dialog.show();
myMethod();
dialog.cancel();

But that didn't work, does anyone have any suggestions?

alditis · Accepted Answer · 2017-10-26 09:47:00Z

8

AsyncTask is my Favouite but you may use Handlers too :)

Invest your time to go through this nice blog.

Below snippet will help you.

    package org.sample;

    import android.app.Activity;
    import android.app.ProgressDialog;
    import android.os.Bundle;
    import android.os.Handler;

    public class Hello extends Activity {

        private Handler handler;
        private ProgressDialog dialog;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            dialog = new ProgressDialog(this);
            dialog.setMessage("Please Wait!!");
            dialog.setCancelable(false);
            dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
            dialog.show();

            new Thread() {
                public void run() {
                    // Do operation here.
                    // ...
                    // ...
                    // and then mark handler to notify to main thread 
                    // to  remove  progressbar
                    //
                    // handler.sendEmptyMessage(0);
                    //
                    // Or if you want to access UI elements here then
                    //
                    // runOnUiThread(new Runnable() {
                    //
                    //     public void run() {
                    //         Now here you can interact 
                    //         with ui elemements.
                    //
                    //     }
                    // });
                }
            }.start();

            handler = new Handler() {
                public void handleMessage(android.os.Message msg) {
                    dialog.dismiss();
                };
            };
        }
    }

edited Oct 26, 2017 at 9:47

alditis

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answered Jun 14, 2012 at 5:39

Vipul

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3 Comments

William L. Over a year ago

I tried using that before but I keep getting "Only the original thread that created a view hierarchy can touch its views." error. And I have no idea what that means... lol... any suggestions?

Vipul Over a year ago

you are trying to access UI elements from thread.Thats why you are getting this error.

William L. Over a year ago

Thanks soo much! It's working perfect now :) I ended up using the the run() like you had it before to do my method, but then using the runOnUiThread to change the views that needed changed! :D

Rajesh · Accepted Answer · 2012-06-14 05:32:44Z

1

Running a long duration task on the UI thread is a "no no". Use AsyncTask to run the long duration tasks in the background and update the UI when it is complete.

answered Jun 14, 2012 at 5:32

Rajesh

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