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It is necessary to display the following notification on android on java http://m.imgur.com/V6aIHnL

Reported as a duplicate by participants of Streletz , Jurijspb ♦ , katso , pavlofff android 24 Sep '16 at 9:53 .

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    private static long back_pressed; @Override public void onBackPressed() { if (back_pressed + 2000 > System.currentTimeMillis()) super.onDestroy(); else Toast.makeText(getBaseContext(), "Нажмите еще раз для выхода", Toast.LENGTH_SHORT).show(); back_pressed = System.currentTimeMillis(); }