Android攻城狮使用SubMenu创建子菜单

给OptionsMenu选项菜单添加子菜单：

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_main);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        // getMenuInflater().inflate(R.menu.main, menu);

        // xml文件加载
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);

        // 代码动态添加子菜单
        // SubMenu file = menu.addSubMenu("文件");
        // SubMenu edit = menu.addSubMenu("编辑");
        //
        // file.add(1, 1, 1, "新建");
        // file.add(1, 2, 1, "打开");
        // file.add(1, 3, 1, "保存");
        // file.setHeaderTitle("文件操作");//子菜单标题
        // file.setHeaderIcon(R.drawable.ic_launcher);//子菜单图标
        //
        // edit.add(2, 1, 1, "复制");
        // edit.add(2, 2, 1, "粘贴");
        // edit.add(2, 3, 1, "剪切");
        // file.setHeaderTitle("编辑操作");
        // file.setHeaderIcon(R.drawable.ic_launcher);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        // xml加载：
        switch (item.getItemId()) {
        case R.id.new_file:
            Toast.makeText(MainActivity.this, "点击新建", 0).show();

            break;
        case R.id.open_file:
            Toast.makeText(MainActivity.this, "点击打开", 0).show();

            break;
        case R.id.save_file:
            Toast.makeText(MainActivity.this, "点击保存", 0).show();

            break;
        case R.id.c_edit:
            Toast.makeText(MainActivity.this, "点击复制", 0).show();

            break;
        case R.id.v_edit:
            Toast.makeText(MainActivity.this, "点击粘贴", 0).show();

            break;
        case R.id.x_edit:
            Toast.makeText(MainActivity.this, "点击剪切", 0).show();

            break;
        }
        // 代码加载：
        // if (item.getGroupId() == 1) {
        // switch (item.getItemId()) {
        // case 1:
        // Toast.makeText(MainActivity.this, "点击新建", 0).show();
        // break;
        //
        // case 2:
        // Toast.makeText(MainActivity.this, "点击打开", 0).show();
        // break;
        // case 3:
        // Toast.makeText(MainActivity.this, "点击保存", 0).show();
        // break;
        // }
        // }
        //
        // if (item.getGroupId() == 2) {
        // switch (item.getItemId()) {
        // case 1:
        // Toast.makeText(MainActivity.this, "点击复制", 0).show();
        // break;
        //
        // case 2:
        // Toast.makeText(MainActivity.this, "点击粘贴", 0).show();
        // break;
        // case 3:
        // Toast.makeText(MainActivity.this, "点击剪切", 0).show();
        // break;
        //
        // }
        // }
        return super.onOptionsItemSelected(item);
    }
}