小编Hab*_*man的帖子

我已经成功地将底部导航与最新的 android 架构导航组件集成在一起。以下是我的完整代码。

1. 导航

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/mobile_navigation"
    app:startDestination="@+id/navigation_home">

    <fragment
        android:id="@+id/navigation_home"
        android:name="in.zedone.bottomsample.ui.home.HomeFragment"
        android:label="@string/title_home"
        tools:layout="@layout/fragment_home" />

    <fragment
        android:id="@+id/navigation_saloons"
        android:name="in.zedone.bottomsample.ui.saloons.SaloonsFragment"
        android:label="@string/title_saloon"
        tools:layout="@layout/fragment_saloons" />

    <fragment
        android:id="@+id/navigation_offers"
        android:name="in.zedone.bottomsample.ui.offers.OffersFragment"
        android:label="@string/title_offer"
        tools:layout="@layout/fragment_offers" />

    <fragment
        android:id="@+id/navigation_account"
        android:name="in.zedone.bottomsample.ui.account.AccountFragment"
        android:label="@string/title_account"
        tools:layout="@layout/fragment_account" />

</navigation>

2. 底部导航视图

<com.google.android.material.bottomnavigation.BottomNavigationView
     android:id="@+id/nav_view"
     android:layout_width="0dp"
     android:layout_height="wrap_content"
     android:layout_marginStart="0dp"
     android:layout_marginEnd="0dp"
     android:background="?android:attr/windowBackground"
     app:labelVisibilityMode="labeled"
     app:itemTextAppearanceActive="@style/BottomNavigationView.Active"
     app:itemTextAppearanceInactive="@style/BottomNavigationView"
     app:layout_constraintBottom_toBottomOf="parent"
     app:layout_constraintLeft_toLeftOf="parent"
     app:layout_constraintRight_toRightOf="parent"
     app:menu="@menu/bottom_nav_menu" />

3. 主要活动

BottomNavigationView navView = findViewById(R.id.nav_view);
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations. …