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Aug 17th, 2019
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  1. // back button 이벤트는 onBackPressed() 함수에서 처리
  2. private long backPressdTime;
  3. ........
  4. ........
  5. @Override
  6. public void onBackPressed() {
  7. // back button 종료 처리
  8. if (backPressdTime + 2000 > System.currentTimeMillis()) {
  9. super.onBackPressed();
  10. return;
  11. } else {
  12. Toast.makeText(this, "back button 을 한번 더 누르시면, 앱이 종료됩니다.", Toast.LENGTH_SHORT).show();
  13. }
  14. backPressdTime = System.currentTimeMillis();
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