Question

I have two activities. The first one executes the second one.

Intent i = new Intent(MyOne.this, MyTwo.class);
                     startActivity(i);

The problem: My second activity does some heavy work on launching so it launches couple of second and before it is launched i see a black screen.

Is it any way to set a progressbar or some image instead of this black screen? Because i don’t think user will wait for something, that he doesn’t know. I tried setting progressbar after setcontentview in my second activity, but progressbar shows up only when activity fully started.

Answer 1

I suggest you to do this asynchronously using AsyncTask.

Short example:

ProgressDialog dialog;
class YourTask extends AsyncTask<Void, Void, Void> {
        protected void onPreExecute() {
                   dialog = ProgressDialog.show(...);
        }

        protected Void doInBackground(Void... unused) {
            try {
               // doSomethingHeavy();
                   // publishProgress(...);
            } catch(Exception e) {
                //...
            } 

            return null;
        }

        protected void onProgressUpdate(Void... unused) {
        }

        protected void onPostExecute(Void unused) {
            dialog.dismiss();

        }
    }