转载:http://www.cnblogs.com/zs851/archive/2011/05/04/2036239.html
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if(keyCode==KeyEvent.KEYCODE_BACK){
//弹出确定退出对话框
new AlertDialog.Builder(this)
.setTitle("退出")
.setMessage("确定退出吗?")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent exit = new Intent(Intent.ACTION_MAIN);
exit.addCategory(Intent.CATEGORY_HOME);
exit.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(exit);
System.exit(0);
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.cancel();
}
})
.show();
//这里不需要执行父类的点击事件,所以直接return
return true;
}
//继续执行父类的其他点击事件
return super.onKeyDown(keyCode, event);
}