1 @Override
2 public boolean onKeyDown(int keyCode, KeyEvent event) {
3 // TODO Auto-generated method stub
4
5 if(keyCode==KeyEvent.KEYCODE_BACK){
6 //弹出确定退出对话框
7 new AlertDialog.Builder(this)
8 .setTitle("退出")
9 .setMessage("确定退出吗？")
10 .setPositiveButton("确定", new DialogInterface.OnClickListener() {
11
12 @Override
13 public void onClick(DialogInterface dialog, int which) {
14 // TODO Auto-generated method stub
15 Intent exit = new Intent(Intent.ACTION_MAIN);
16 exit.addCategory(Intent.CATEGORY_HOME);
17 exit.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
18 startActivity(exit);
19 System.exit(0);
20 }
21 })
22 .setNegativeButton("取消", new DialogInterface.OnClickListener() {
23
24 @Override
25 public void onClick(DialogInterface dialog, int which) {
26 // TODO Auto-generated method stub
27 dialog.cancel();
28 }
29 })
30 .show();
31 //这里不需要执行父类的点击事件，所以直接return
32 return true;
33 }
34 //继续执行父类的其他点击事件
35 return super.onKeyDown(keyCode, event);
36 }
