How do I return to a calling activity if the user presses BACK?

Question

My MAIN activity is spawning a child activity that contains a ListView. While this ListView is being populated (through an AsyncTask), an indeterminate progress bar is shown.

However, assuming that I am an impatient user and I press the BACK button, the progress bar is cancelled but I am left with a blank screen. I have to press BACK one more time to go back to the MAIN activity.

I would like the app to go back directly to the MAIN activity by pressing BACK only once. Can somebody point me in the right direction? I am thinking I should call finish() somewhere but I don't know where to put it. Thanks in advance!

Answer 1

you can try like this,place this code in your activities oncreate block.

findViewById(R.id.back).setOnClickListener(new OnClickListener() { public void onClick(View v) {

                    finish();
                }
            });

Answer 2

Use setOnCancelListener() on Dialog (which ProgressDialog extends).

Answer 3

you should override "onBackPressed()" it will call when the activity has detected the user's press of the back key.

@override
 public void onBackPressed(){
   this.startActivity(this,MainActivity.class);
 }

this code will call the MainActivity when emulator/ipphone back button pressed...