Exit the app after clicking the back button

Question

I have a simple game that contains three pages: start_page, play_page and lose_page. In the lose_page I added home_button that will take you to the start_page to play again.

What I want is when I press the back button of the phone in the start_page to take me out of the game, but the problem is the back button takes me to the previous page which is the lose_page.

Here is the code of the home_button in the lose_page that takes you to the start_page:

    Button home_btn = (Button)findViewById(R.id.btnPlayAgain);
    home_btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent i = new Intent(LostActivity.this,
                    HomeActivity.class);                        
            startActivity(i);

        }
    }); 

Any help will be appreciated.

Answer 1

Try adding the finish() method to your code,

  Button home_btn = (Button)findViewById(R.id.btnPlayAgain);
    home_btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent i = new Intent(LostActivity.this,
                    HomeActivity.class);                        
            startActivity(i);
            //call the finish method
            finish();

        }
    }); 

When calling finish() on an activity, the method onDestroy() is executed and will destroy your LostActivity which would prevent going back to LostActivity from HomeActivity.