Android-菜单关联activity

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_main);
    }
    //当用户点击按钮键时 触发该方法
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        //向 Menu 中添加子菜单
        SubMenu prog = menu.addSubMenu("Open new activity");
        //设置菜单头图标
        prog.setHeaderIcon(R.drawable.seek02);
        //设置菜单头标题
        prog.setHeaderTitle("选择宁乡要启动的程序");
        //添加菜单项
        MenuItem menuItem = prog.add("watch csti");
        //为菜单设置关联activity
        menuItem.setIntent(new Intent(this, FullscreenActivity.class));
        return super.onCreateOptionsMenu(menu);
    }
}