我为我的应用程序使用了可以在android studio中添加的导航抽屉,并且向Nav-drawer添加了一些菜单项(请参见代码块).如果我按第一个项目(nav_home)或第二个,则导航抽屉会高亮显示当前按下的项目.

如果我按下项目“ nav_information”按钮或其他项目,则新的(单击的)片段将打开并且看不到突出显示的内容(主页或第二个仍然突出显示的内容)

不久,只有前几项在所选项目上显示突出显示.

 <?xml version="1.0" encoding="utf-8"?>
<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_home"
        android:icon="@drawable/ic_home_black"
        android:title="Startseite" />

    <item android:id="@+id/nav_greetings"
        android:title="Grußwort"/>
    </group>

<group android:checkableBehavior="single">
    <item android:title="Neuigkeiten">
    <menu >

        <item
            android:id="@+id/nav_information"
            android:icon="@drawable/ic_info_black"
            android:title="@string/title_activity_aktuelles" />

    </menu>
    </item>
</group>
 ....

这就是我处理片段打开方式的方式.

  @SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    Fragment myFragment = null;

    if (id == R.id.nav_home) {
            drawer.setSelected(true);
        myFragment = new MainScreen();
    }else if (id == R.id.nav_greetings){
        myFragment = new Greetings();
    } else if (id == R.id.nav_information) {
        myFragment = new Aktuelles();
    } else if (id == R.id.nav_directions) {
        myFragment = new Anfahrt();
    } else if (id == R.id.nav_basilika) {
        myFragment = new Rundabout();
    } else if (id == R.id.nav_download) {
        myFragment = new Downloads();
    } else if (id == R.id.nav_history) {
        myFragment = new History();
    }else if(id == R.id.nav_hauptwallfahrt){
        myFragment = new Hauptwallfahrt();
    }else if (id == R.id.nav_themenwallfahrt){
        myFragment = new Themenwallfahrt();
    }else if (id == R.id.nav_pilgergruppen){
        myFragment = new Pilgergruppen();
    }else if (id ==R.id.nav_wallfahrtgodi){
        myFragment = new Wallfahrtsgottesdienste();
    }


    FragmentManager fragmentManager = getSupportFragmentManager();

    FragmentTransaction ft = fragmentManager.beginTransaction();

    // Replace the requestet Fragment
    ft.replace(R.id.container, myFragment) ;
    ft.commit();

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}

有办法“启用”突出显示吗？

提前致谢！

解决方法:

您只需要更改标签的顺序

我尝试了最后一组,但可以,请检查

<item android:title="Neuigkeiten">
  <menu >
      <group android:checkableBehavior="single">
          <item
            android:id="@+id/nav_information"
            android:icon="@drawable/ic_info_black"
            android:title="@string/title_activity_aktuelles" />

     </group>
 </menu>