Android 点击回退按钮时弹出提示框

来源：互联网发布：南京好玩的地方知乎编辑：程序博客网时间：2024/06/03 18:31

public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode==KeyEvent.KEYCODE_BACK&&event.getRepeatCount()==0){
                AlertDialog.Builder alertbBuilder=new AlertDialog.Builder(YDZF_DemoActivity.this);
                alertbBuilder.setTitle("提示").setMessage("确认退出？").setPositiveButton("确定", new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                                //结束这个Activity
                           YDZF_DemoActivity.this.finish();
                        }
                }).setNegativeButton("取消", new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                                dialog.cancel();

                        }
                }).create();
                alertbBuilder.show();

        }
        return true;
    };s