架构导航组件的底部导航片段动画化

Question

我已经成功的将底部导航与最新的android架构导航组件进行了整合。以下是我的完整代码。

1. 导航组件

<?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. BottomNavigationView

<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.
AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
                R.id.navigation_home, R.id.navigation_saloons, R.id.navigation_offers,R.id.navigation_account)
                .build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
NavigationUI.setupWithNavController(navView, navController);

现在如何在底部导航中选择每个tabfragment时添加过渡动画？

Answer 1

第一加 动画 资源文件夹。

第二例如，添加你的过渡文件。

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="@integer/slideAnimDuration"
android:interpolator="@android:anim/decelerate_interpolator"
android:shareInterpolator="true">
<translate
    android:fromXDelta="@integer/negSlideAnimValue"
    android:toXDelta="0" />

<alpha
    android:fromAlpha="0.0"
    android:toAlpha="1.0" />
</set>

第三，打开你的导航图，点击一个目标，在动画部分，选择你刚才创建的动画过渡文件。

希望能帮到你。

祝你编码愉快"■▄▄■▓。