【文件属性】：
文件名称：安卓单击两次返回键退出程序
文件大小：1KB
文件格式：TXT
更新时间：2016-05-03 10:50:15
退出
boolean isExit;
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
exit();
return false;
} else {
return super.onKeyDown(keyCode, event);
}
}
private void exit() {
// TODO Auto-generated method stub
if (!isExit) {
isExit = true;
Toast.makeText(getApplicationContext(), "再按一次退出程序", Toast.LENGTH_SHORT).show();
mHandler.sendEmptyMessageDelayed(0, 2000);
} else {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
startActivity(intent);
System.exit(0);
}
}
Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
isExit = false;
}
};