上下文菜单

public class MainActivity extends Activity {
    private ImageView imageView;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = (ImageView) findViewById(R.id.imageView1);
        //给图片控件注册上下文菜单（当长按图片的时候会弹出一个上下文菜单）
        registerForContextMenu(imageView);
    }

    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        //给菜单添加选项，
        //参数1:分组 2:ID 3.排列顺序 4.标题
        menu.add(1, 1, 1, "删除");
        menu.add(1, 3, 3, "另存为");
        //给分享选项添加子菜单
        SubMenu subMenu =menu.addSubMenu(1, 2, 2, "分享");
        subMenu.add(1, 1, 1, "分享到腾讯微博");
        subMenu.add(1, 2, 2, "分享到新浪微博");
        super.onCreateContextMenu(menu, v, menuInfo);
    }

    public boolean onContextItemSelected(MenuItem item) {
        return super.onContextItemSelected(item);
    }

}