代码过程中中, 将代码过程中比较常用的代码段做个珍藏, 下面的代码内容是关于 Android 控制双击返回按钮退出程序的代码, 应该是对大家有些帮助.
- private static long back_pressed;
- @Override
- public void onBackPressed()
- {
- if (back_pressed + 2000> System.currentTimeMillis()) super.onBackPressed();
- else Toast.makeText(getBaseContext(), "Press once again to exit!", Toast.LENGTH_SHORT).show();
- back_pressed = System.currentTimeMillis();
- }
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