android TV开发:弹出菜单实现

1.在有时候我们需要选择排序方式，在电视开发中往往使用一个弹出菜单实现，Demo效果：
2.核心代码：
public class MainActivity extends Activity {    private PopupWindow popupWindow;    private View contentView;    private Button btn;//...    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);//...        createPopWindow();//初始化弹出界面        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //从底部显示                popupWindow.showAtLocation(contentView, Gravity.BOTTOM, 0, 0);            }        });    }    private void createPopWindow() {        contentView = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_window, null);        //设置弹出框的宽度和高度        popupWindow = new PopupWindow(contentView, ViewGroup.LayoutParams.MATCH_PARENT, 180);        popupWindow.setFocusable(true);// 取得焦点        //注意  要是点击外部空白处弹框消息  那么必须给弹框设置一个背景色  不然是不起作用的        popupWindow.setBackgroundDrawable(new BitmapDrawable());        //点击外部消失        popupWindow.setOutsideTouchable(true);        //设置可以点击        popupWindow.setTouchable(true);        //进入退出的动画        popupWindow.setAnimationStyle(R.style.mypopwindow_anim_style);reMen = (Button)contentView.findViewById(R.id.reMen);        zuiXin = (Button)contentView.findViewById(R.id.zuiXin);        pingFen = (Button)contentView.findViewById(R.id.pingFen);        //是否选中的小图标        img = (ImageView)contentView.findViewById(R.id.img);        img2 = (ImageView)contentView.findViewById(R.id.img2);        img3 = (ImageView)contentView.findViewById(R.id.img3);        img2.setVisibility(View.INVISIBLE);        img3.setVisibility(View.INVISIBLE);        reMen.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                img.setVisibility(View.VISIBLE);                img2.setVisibility(View.INVISIBLE);                img3.setVisibility(View.INVISIBLE);            }        });        pingFen.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                img2.setVisibility(View.VISIBLE);                img.setVisibility(View.INVISIBLE);                img3.setVisibility(View.INVISIBLE);            }        });        zuiXin.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                img3.setVisibility(View.VISIBLE);                img2.setVisibility(View.INVISIBLE);                img.setVisibility(View.INVISIBLE);            }        });    }}
3.demo源码+apk 下载
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