多个Fragment之间的切换

最新推荐文章于 2024-06-26 15:22:32 发布

原创最新推荐文章于 2024-06-26 15:22:32 发布 · 817 阅读

CC 4.0 BY-SA版权

本文介绍了一种在Android应用中实现Fragment切换的方法，并确保切换过程中能够保存各Fragment的状态。通过使用FragmentManager和FragmentTransaction，可以有效地展示和隐藏不同的Fragment，从而提供流畅的用户体验。

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/*
   * 跳转到某个fragment，并保存fragment的状态
   */
   private void showFragment(int id) {
       FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
       hindFragment(transaction);

       switch (id) {
       case 1:
           if (fragmentMain != null) {
               transaction.show(fragmentMain);
           } else {
               fragmentMain = new MainFragment();
               transaction.add(R.id.linear_layout_home_fragment, fragmentMain);
           }
           break;
       case 2:
           if (fragmentLookCar != null) {
               transaction.show(fragmentLookCar);
           } else {
               fragmentLookCar = new LookCarFragment();
               transaction.add(R.id.linear_layout_home_fragment,
                       fragmentLookCar);
           }
           break;
       case 3:
           if (fragmentShangCheng != null) {
               transaction.show(fragmentShangCheng);
           } else {
               fragmentShangCheng = new ShangChengFragment();
               transaction.add(R.id.linear_layout_home_fragment,
                       fragmentShangCheng);
           }
           break;
       case 4:
           if (personalCenterFragment != null) {
               transaction.show(personalCenterFragment);
           } else {
               personalCenterFragment = new PersonalCenterFragment();
               transaction.add(R.id.linear_layout_home_fragment,
                       personalCenterFragment);
           }
           break;
       }
       transaction.commit();
   }

   /*
   * 隐藏fragment
   */
   private void hindFragment(FragmentTransaction transaction) {
       if (fragmentMain != null) {
           transaction.hide(fragmentMain);
       }
       if (fragmentLookCar != null) {
           transaction.hide(fragmentLookCar);
       }
       if (fragmentShangCheng != null) {
           transaction.hide(fragmentShangCheng);
       }
       if (personalCenterFragment != null) {
           transaction.hide(personalCenterFragment);
       }
   }