FrameLayout切换

public class MainActivity extends AppCompatActivity {

private RadioGroup radio_group;
private FragmentManager manager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //初始化
    radio_group = findViewById(R.id.radio_group);
    //获取适配器
    manager = getSupportFragmentManager();
    final Frag01 frag01 = new Frag01();
    final Frag02 frag02 = new Frag02();
    manager.beginTransaction().add(R.id.fragment_layout,frag01)
            .add(R.id.fragment_layout,frag02)
            .show(frag01).hide(frag02).commit();
    //点击切换
    radio_group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
           FragmentTransaction transaction =  manager.beginTransaction();
           switch (checkedId){
               case R.id.rd1:
                   transaction.show(frag01).hide(frag02);
                   break;
               case R.id.rd2:
                   transaction.show(frag02).hide(frag01);
                   break;
           }
           transaction.commit();
        }
    });

}

}