Question

所以我试图找出这是否可行。我需要从选中的fragments个activity中将两个tab加载到两个容器中。

我发现了Android - Multiple fragments in ONE tab

但没有人回答过这个问题。

所以这里是代码示例和我尝试过的内容。

听者

surveyTabListener = new TabListener<Load_Fragment>(this,
            R.id.header_fragment_container, Load_Fragment.class);

onTabSelected

public void onTabSelected(Tab tab, FragmentTransaction ft) {

        if (fragment == null) {
            String fragmentName = fragmentClass.getName();
            fragment = Fragment.instantiate(activity, fragmentName);
            ft.add(fragmentContainer, fragment, fragmentName);
        } else
            ft.attach(fragment);
}

现在我尝试将第二个listener添加到inflate第二个fragment这样

surveyTabListener2 = new TabListener<Store_Fragment>(this, 
            R.id.store_fragment_container, Store_Fragment.class);

我也尝试在if else中使用第二个onTabSelected语句

public void onTabSelected(Tab tab, FragmentTransaction ft) {

        if (fragment == null) {
            String fragmentName = fragmentClass.getName();
            fragment = Fragment.instantiate(activity, fragmentName);
            ft.add(fragmentContainer, fragment, fragmentName);
        } else
            ft.attach(fragment);                        

        if (fragment2 == null) {
            String fragmentName2 = fragmentClass2.getName();
            fragment2 = Fragment.instantiate(activity, fragmentName2);
            ft.add(fragmentContainer2, fragment2, fragmentName2);
        } else
            ft.attach(fragment2);

    }

既不工作，我要么得NPE (null pointer)，要么一无所获，但我没有错。

这似乎应该经常进行，但我似乎无法弄明白。

Answer 1

你需要使用一个空片段作为你的两个片段的容器，我会发布一些代码来告诉你我是如何把它分开的。

那是片段容器：

public static class FragmentInsideContainer extends Fragment {

        ListView mainListView;
        ArrayAdapter<Producer> listAdapter;
        TextView inputSearch;
        static FragmentInsideContainer containerReference;
        String idProd;

        public FragmentInsideContainer() {

        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.layoutcontaineprod, container, false);

            FragmentInsideContainer.containerReference = this;

            FragmentDetailProd fragmentDetailProd = new FragmentDetailProd();
            FragmentDetailProd.id = this.idProd;

            DummySectionFragment2.currentDetailProdFragment = fragmentDetailProd;

            FragmentListWine fragmentListWine = new FragmentListWine();
            fragmentListWine.id = this.idProd;

            DummySectionFragment2.currentListWineFragment = fragmentListWine;

            FragmentInsideContainer.containerReference.getChildFragmentManager().beginTransaction().replace(R.id.containerDetail, fragmentDetailProd).commit();
            FragmentInsideContainer.containerReference.getChildFragmentManager().executePendingTransactions();
            FragmentInsideContainer.containerReference.getChildFragmentManager().beginTransaction().add(R.id.containerDetail, fragmentListWine).commit();
            FragmentInsideContainer.containerReference.getChildFragmentManager().executePendingTransactions();

            return rootView;
        }

Answer 2

我突然意识到我是以错误的方式解决这个问题。我想出了一种方法来完成我正在寻找的东西，这很简单。如果其他人有这个问题，这就是解决方案。

public void onTabSelected(Tab tab, FragmentTransaction ft) {
        //get the name of the tab currently selected
        String name = (String) tab.getText().toString();

        // compare it to the tab you  would like to do something with        
        if (name == "Assets") {
            //load the 1st fragment
            fragment = new Store_Fragment();
            getFragmentManager().beginTransaction()
                    .setCustomAnimations(android.R.animator.fade_in,
                            android.R.animator.fade_out)
                    .replace(R.id.store_fragment_container, fragment).commit();

            //load the 2nd fragment
            fragment2 = new Load_Fragment();
            getFragmentManager().beginTransaction()
                    .setCustomAnimations(android.R.animator.fade_in,
                            android.R.animator.fade_out)
                    .replace(R.id.header_fragment_container, fragment2).commit();
        }

......那就是它。我希望这有助于其他人。

来自ONE ActionTab的多个片段

2 个答案: