以下代码将只使菜单项被选中:

navigationView.setCheckedItem (id);

要选择并打开菜单项，请在上面的行后添加以下代码。

onNavigationItemSelected (navigationView.getMenu () .getItem (0));

首先，为选定的项目创建颜色。这里https://stackoverflow.com/a/30594875/1462969很好的例子。它可以帮助你改变图标的颜色。为了改变所有选定项目的背景添加到您的价值\style.xml文件this

  <item name="selectableItemBackground">@drawable/selectable_item_background</item>

在drawable/selectable_item_background.xml中应该声明selectable_item_background

  <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/accent_translucent"
      android:state_pressed="true" />
    <item android:drawable="@android:color/transparent" />
   </selector>

哪里可以在style.xml中声明颜色

 <color name="accent_translucent">#80FFEB3B</color>

在这之后

   // The main navigation menu with user-specific actions
        mainNavigationMenu_ = (NavigationView) findViewById(R.id.main_drawer);
        mainNavigationMenu_.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(MenuItem menuItem) {
                mainNavigationMenu_.getMenu().findItem(itemId).setChecked(true);
                return true;
            }
        });

正如你看到的，我用了这个 .setChecked mainNavigationMenu_.getMenu () .findItem (itemId)(真正的); 设置所选项目。 这里navigationView

 <android.support.design.widget.NavigationView
        android:id="@+id/main_drawer"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/header_main_navigation_menu"
        app:itemIconTint="@color/state_list"
        app:itemTextColor="@color/primary"
        app:menu="@menu/main_menu_drawer"/>

您可以用下面的一行代码突出显示和选择项目:

navigationView.getMenu().performIdentifierAction(R.id.posts, 0);

来源:https://stackoverflow.com/a/31044917/383761

例子(NavigationView.OnNavigationItemSelectedListener):

private void setFirstItemNavigationView() {
        navigationView.setCheckedItem(R.id.custom_id);
        navigationView.getMenu().performIdentifierAction(R.id.custom_id, 0);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setFirstItemNavigationView();
}

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    FragmentManager fragmentManager = getFragmentManager();

    switch (item.getItemId()) {
        case R.id.custom_id:
            Fragment frag = new CustomFragment();

            // update the main content by replacing fragments
            fragmentManager.beginTransaction()
                    .replace(R.id.viewholder_container, frag)
                    .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
                    .addToBackStack(null)
                    .commit();
            break;
    }

Tks

你也可以拨打:

navigationView.setCheckedItem(id);

此方法在API 23.0.0中引入

例子

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      tools:ignore="UnusedIds">

    <group
        android:id="@+id/group"
        android:checkableBehavior="single">
        <item
            android:id="@+id/menu_nav_home"
            android:icon="@drawable/ic_home_black_24dp"
            android:title="@string/menu_nav_home" />
    </group>
</menu>

注意:android: checkableBehavior = "单"

看这个

最简单的方法是从xml中选择它，如下所示:

<menu>
   <group android:checkableBehavior="single">
         <item
              android:checked="true"
              android:id="@+id/nav_home"
              android:icon="@drawable/nav_home"
              android:title="@string/main_screen_title_home" />

注意这一行android:checked="true"