Android实现面包屑功能的代码(支持Fragment联动)

breadCrumbsView.setOnTabListener(new BreadCrumbsView.OnTabListener() {
  @Override
  public void onAdded(BreadCrumbsView.Tab tab) {
    Log.e("BreadCrumbsView", "BreadCrumbsView.OnTabListener#onAdded tab:" + tab.getIndex());
    addFragment(tab);
  }

  @Override
  public void onActivated(BreadCrumbsView.Tab tab) {
    Log.e("BreadCrumbsView", "BreadCrumbsView.OnTabListener#onActivated tab:" + tab.getIndex());
  }

  @Override
  public void onRemoved(BreadCrumbsView.Tab tab) {
    Log.e("BreadCrumbsView", "BreadCrumbsView.OnTabListener#onRemoved tab:" + tab.getIndex());
    removeLastFragment();
  }
});

private void addFragment(BreadCrumbsView.Tab tab) {
  // TODO: 2020/5/26 3:26 PM 在这里添加你自己的Fragment，tab#getValue返回的是创建Tab时传入的数据，可以根据这些数据创建你自己想要的Fragment
  Fragment fragment = BlankFragment.newInstance(String.format("我是第%d个Fragment", tab.getIndex()), "" + tab.getIndex());
  getSupportFragmentManager()
      .beginTransaction()
      .add(R.id.container, fragment, String.valueOf(tab.getIndex()))
      .show(fragment)
      .addToBackStack(null)
      .commit();
  fragments.add(fragment);
}

/**
 * 移除最后一个Fragment，显示倒数第二个Fragment
 */
private void removeLastFragment() {
  if (fragments != null && fragments.size() > 1) {
    getSupportFragmentManager().popBackStackImmediate();
    fragments.removeLast();
    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager.beginTransaction()
        .show(fragments.getLast())
        .commit();
    fragmentManager.executePendingTransactions();
  }
}