java如何修复“Android资源链接失败”？使用NavigationView和片段

4 月，2 周 Questions & Answers 1314

我想为我的Android Studio应用程序使用一个汉堡包菜单，我正在尝试遵循本教程：https://github.com/codepath/安卓_guides/wiki/Fragment-Navigation-Drawer

在我的activity_main.xml文件中，我有一个错误：

Android resource linking failed 
E:\Smoozy\Documents\Findcontent\app\src\main\res\layout\activity_main.xml:76:
 error: resource menu/drawer_view (aka com.example.findcontent:menu/drawer_view) not found.
error: failed linking file resources.

这是我的文件目录： https://imgur.com/a/8bqT9rY

我的drawer_view.xml在布局文件夹中，我试图从app:menu="@menu/drawer_view"/>代码语句中删除“menu”

 <!-- This DrawerLayout has two children at the root  -->
<安卓.support.v4.widget.DrawerLayout
    xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
    xmlns:app="http://schemas.安卓.com/apk/res-auto"
    安卓:id="@+id/drawer_layout"
    安卓:layout_width="match_parent"
    安卓:layout_height="match_parent">
    <!-- The navigation drawer that comes from the left -->
    <!-- Note that `安卓:layout_gravity` needs to be set to 'start' -->
    <安卓.support.design.widget.NavigationView
        安卓:id="@+id/nvView"
        安卓:layout_width="wrap_content"
        安卓:layout_height="match_parent"
        安卓:layout_gravity="start"
        安卓:layout_weight="1"
        安卓:background="@安卓:color/white"
        app:menu="@menu/drawer_view"/>

    <!-- This LinearLayout represents the contents of the screen  -->
    <FrameLayout
        安卓:layout_width="match_parent"
        安卓:layout_height="match_parent"
        安卓:orientation="vertical">

        <!-- The ActionBar displayed at the top -->
        <include
            layout="@layout/toolbar"
            安卓:layout_width="match_parent"
            安卓:layout_height="wrap_content" />

        <!-- The main content view where fragments are loaded -->
        <FrameLayout
            安卓:id="@+id/flContent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"
            安卓:layout_width="match_parent"
            安卓:layout_height="match_parent" />
    </FrameLayout>


</安卓.support.v4.widget.DrawerLayout>
</安卓x.constraintlayout.widget.ConstraintLayout>

这是试图达到它的代码：

public void selectDrawerItem(MenuItem menuItem) {
    // Create a new fragment and specify the fragment to show based on     nav item clicked
    Fragment fragment = null;
    Class fragmentClass;
    switch(menuItem.getItemId()) {
        case R.id.nav_first_fragment:
            fragmentClass = FirstFragment.class;
               getSupportFragmentManager().beginTransaction().replace(R.id.flContent, new FirstFragment()).commit();

            break;
        case R.id.nav_second_fragment:
            fragmentClass = SecondFragment.class;
            getSupportFragmentManager().beginTransaction().replace(R.id.flContent, new SecondFragment()).commit();
            break;
        case R.id.nav_third_fragment:
            fragmentClass = ThirdFragment.class;
            getSupportFragmentManager().beginTransaction().replace(R.id.flContent, new ThirdFragment()).commit();
            break;
        default:
            fragmentClass = FirstFragment.class;
    }

    try {
        fragment = (Fragment) fragmentClass.newInstance();
    } catch (Exception e) {
        e.printStackTrace();
    }

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

    // Highlight the selected item has been done by NavigationView
    menuItem.setChecked(true);
    // Set action bar title
    setTitle(menuItem.getTitle());
    // Close the navigation drawer
    mDrawer.closeDrawers();
}

// ...

谢谢!

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