Android兩次返回鍵退出APP(總結)
阿新 • • 發佈:2019-01-19
//退出時的時間 private long mExitTime; //對返回鍵進行監聽 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) { exit(); return true; } return super.onKeyDown(keyCode, event); } public void exit() { if ((System.currentTimeMillis() - mExitTime) > 2000) { Toast.makeText(MainActivity.this, "再按一次退出歐美同學會", Toast.LENGTH_SHORT).show(); mExitTime = System.currentTimeMillis(); } else { MyConfig.clearSharePre(this, "users"); finish(); System.exit(0); } }