Press Back

Event press Back

@Override

    public void onBackPressed() {        // to prevent irritating accidental logouts

        long t = System.currentTimeMillis();

  

        if (t - backPressedTime > 2000) {    // 2 secs

            backPressedTime = t;

            Toast.makeText(this, "Press Back again to exit",

                                Toast.LENGTH_SHORT).show();

        } else {    // this guy is serious

            // clean up

            super.onBackPressed(); 

        }

    }

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Nguyễn Văn Duy

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