Android to listen back key press on the settings page if i open that from my application

Question

From my activity A open a device setting page with firing the intent.can i listen back key press event on the device settings page.

e.gSettings.ACTION_APN_SETTINGS

Answer 1

Assuming your settings page is an Activity, you can override the onBackPressed() method:

@Override
public void onBackPressed() {
    // Do stuff.
}

or

@Override
protected boolean onKeyDown(int keyCode, KeyEvent event) {
    // Do stuff if event == KeyEvent.KEYCODE_BACK.
}

Edit.

If you're thinking of listening (and processing) back presses in Activity A while your settings page is displayed, consider using a Fragment for your settings page, which you add and display in Activity A.

Edit 2 - answer to your comment:

As far as I know, there is no way to listen for e.g. wifi on/off clicks, but what you can do is the following:

startActivityForResult(new Intent(Settings.ACTION_WIFI_SETTINGS), 0xB00B);

then

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK && requestCode == 0xB00B) {
        // Check if WIFI is on/off. That way you know what the user pressed.
    }
}