Android ถามท่านผู้รู้ครับ อยากทราบคำสั่งออกจากโปรแกรม คือออกจากทุก Activity ทั้งหมด (How to kill an application with all its activities?)

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

		public void Exit_Program(View v) {
			// ออกโปรแกรม
			Intent intent = new Intent(Intent.ACTION_MAIN);
			intent.addCategory(Intent.CATEGORY_HOME);
			intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			startActivity(intent);
		}      	

 @Override
    protected void onPause() {

        super.onPause();

        System.exit(0);

    }

 case R.id.menu_settings:

      finish();
     return true;

public void onBackPressed() {
        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
        dialog.setTitle("Exit");
        dialog.setIcon(R.drawable.logo);
        dialog.setCancelable(true);
        dialog.setMessage("Do you want to exit?");
        dialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                Intent intent = new Intent(Intent.ACTION_MAIN);
                intent.addCategory(Intent.CATEGORY_HOME);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                startActivity(intent);
            }
        });

        dialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });

        dialog.show();
    }