使用ViewPager/TabLayout同步两个片段上的旋转控件

// 在布局文件中添加ViewPager和TabLayout
<androidx.viewpager.widget.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<com.google.android.material.tabs.TabLayout
    android:id="@+id/tabLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"
    app:tabGravity="fill"
    app:tabMode="fixed" />

// 创建两个片段
public class Fragment1 extends Fragment {
    private ImageView imageView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment1_layout, container, false);
        imageView = view.findViewById(R.id.imageView);
        return view;
    }

    // 在片段中设置旋转效果
    public void rotateImage(float degrees) {
        imageView.setRotation(degrees);
    }
}

// 在Activity中设置ViewPager和TabLayout
public class MainActivity extends AppCompatActivity {
    private ViewPager viewPager;
    private TabLayout tabLayout;

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

        viewPager = findViewById(R.id.viewPager);
        tabLayout = findViewById(R.id.tabLayout);

        FragmentPagerAdapter adapter = new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                if (position == 0) {
                    return new Fragment1();
                } else {
                    return new Fragment2();
                }
            }

            @Override
            public int getCount() {
                return 2;
            }
        };

        viewPager.setAdapter(adapter);
        tabLayout.setupWithViewPager(viewPager);
    }
}

// 在Activity中获取片段实例，并调用旋转方法
public class MainActivity extends AppCompatActivity {
    private ViewPager viewPager;
    private TabLayout tabLayout;
    private Fragment1 fragment1;
    private Fragment2 fragment2;

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

        viewPager = findViewById(R.id.viewPager);
        tabLayout = findViewById(R.id.tabLayout);

        FragmentPagerAdapter adapter = new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                if (position == 0) {
                    fragment1 = new Fragment1();
                    return fragment1;
                } else {
                    fragment2 = new Fragment2();
                    return fragment2;
                }
            }

            @Override
            public int getCount() {
                return 2;
            }
        };

        viewPager.setAdapter(adapter);
        tabLayout.setupWithViewPager(viewPager);
    }

    // 在需要同步旋转的地方调用片段的旋转方法
    public void syncRotation(float degrees) {
        if (fragment1 != null) {
            fragment1.rotateImage(degrees);
        }
        if (fragment2 != null) {
            fragment2.rotateImage(degrees);
        }
    }
}