Android AlertDialog ————单选对话框

 //弹出一个单选对话框
    private void showSingleDialog() {
        //[1]构造对话框的实例
        AlertDialog.Builder builder = new Builder(this);
        builder.setTitle("请选择你喜欢的课程");
        //[1.1]★★★★★★
        final String items[] = {"android","ios","c++","html","游戏"};
        builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                //[1]获取选择条目
                String item = items[which];
                //[2]把选择的条目展示到toast上
                Toast.makeText(getApplicationContext(), item, 1).show();
                //[3]关闭对话框
                dialog.dismiss();
            }
        });
        //[3]展示对话框  和toast一样 一定要记得show出来
        builder.show();
    }

简单的东西Copy过去用就好了