在Android中用碎片制作菜单

// 碎片类
public class MyFragment extends Fragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true); // 告诉系统该碎片有菜单项
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.fragment_menu, menu); // 加载菜单布局文件
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_item1:
                // 处理菜单项1的点击事件
                return true;
            case R.id.menu_item2:
                // 处理菜单项2的点击事件
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
}

// 活动类
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

        MyFragment fragment = new MyFragment();
        fragmentTransaction.add(R.id.fragment_container, fragment); // 将碎片添加到布局中
        fragmentTransaction.commit();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_menu, menu); // 加载活动的菜单布局文件
        return true;
    }
}