Android 如何显示导航栏以打开片段上的链接

我想在运行时在导航抽屉中显示一个列表或某种菜单。我有一个单独的活动，在其中我使用框架布局放置片段。此片段包含Webview。每当用户单击导航项时，webview就会打开其可选链接。我成功地收到了改装2.3的响应，但现在我不知道如何实现这一点

            public void onResponse(Call<List<NavBarResult>> call, Response<List<NavBarResult>> response) {
                List<Result> result = response.body();
//what to do here ?
            }
            @Override
            public void onFailure(Call<List<NavBarResult>> call, Throwable t) {
//error messages here
            }

我希望所有菜单项都能自动工作，即使我们更改了API中的数据。提前感谢。

可能重复

您可以从导航视图中动态获取菜单，然后使用JSON响应添加新菜单项

在OnNavigationItemSelectedListener中，您可以更改Web视图的URL

编辑1

也许我误解了什么。是否要用JSON响应填充导航栏？在这种情况下，我上面的链接可以帮助你

是否要用JSON响应填充导航抽屉？ 在这种情况下，您应该开始阅读以下内容：

编辑活动布局：

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- The main content view -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <!-- The navigation drawer -->
    <ListView android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#111"/>
</android.support.v4.widget.DrawerLayout>

当您得到JSON响应时，只需将适配器设置到mDrawerList：

public void onResponse(Call<List<NavBarResult>> call, Response<List<NavBarResult>> response) {
    // result is a private List<Result> attribute of the class.
    result = response.body();

    // Set the adapter for the list view
    mDrawerList.setAdapter(new ArrayAdapter<Result>(this,
    android.R.layout.simple_list_item_1, result));

    // Set the list's click listener
    mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
}

---

希望这次能对你有所帮助

您可以在导航抽屉中添加导航视图，然后当您从API接收项目时，您可以将项目添加到菜单中。请参见下面的代码以从菜单中添加项目

final Menu menu = navigationView.getMenu();
//Here you should add the length of your json array instead 'i' .
for (int i = 1; i <= 3; i++) {
   menu.add("Runtime item "+ i);
}

public void onResponse(Call<List<NavBarResult>> call, Response<List<NavBarResult>> response) {
    // result is a private List<Result> attribute of the class.
    result = response.body();

    // Set the adapter for the list view
    mDrawerList.setAdapter(new ArrayAdapter<Result>(this,
    android.R.layout.simple_list_item_1, result));

    // Set the list's click listener
    mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
}

private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        selectItem(position);
    }
}

private void selectItem(int position) {
    // Create a new fragment and specify the link to show based on position
    Fragment fragment = new MyFragment();
    Bundle args = new Bundle();
    args.putString(MyFragment.ARG_LINK, result.get(position).getUrl());
    fragment.setArguments(args);

    // Insert the fragment by replacing any existing fragment
    FragmentManager fragmentManager = getFragmentManager();
    fragmentManager.beginTransaction()
                   .replace(R.id.content_frame, fragment)
                   .commit();

    // Highlight the selected item and close the drawer
    mDrawerList.setItemChecked(position, true);
    mDrawerLayout.closeDrawer(mDrawerList);
}

final Menu menu = navigationView.getMenu();
//Here you should add the length of your json array instead 'i' .
for (int i = 1; i <= 3; i++) {
   menu.add("Runtime item "+ i);
}