BottomSheetBehavior 不在 androidX 库中

Question

我使用的是 BottomSheetBehavior 和原始支持库：

implementation 'com.android.support:design:27.1.1'

当我迁移到使用新的 androidx 库时，尽管缺少 BottomSheetBehavior。来自上述支持库的映射也不在 AndroidX Refactoring List 中，但迁移工具将其删除。

将 BottomSheetBehavior 包含在新的 androidx 库中我错过了什么。

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.google.android.material:material:1.0.0-beta01'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

    // ReactiveX
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
    implementation 'io.reactivex.rxjava2:rxkotlin:2.2.0'

    implementation 'com.android.support:design:28.1.0'

    // Android Compatability Libraries
    // Version: https://developer.android.com/topic/libraries/support-library/refactor
    implementation 'androidx.appcompat:appcompat:1.0.0-beta01'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha1'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0-beta01'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0-beta01'
    implementation 'androidx.recyclerview:recyclerview:1.0.0-beta01'

    // Android Navigation Component
    // Check here for updated version info - will move to androidx soon.
    // https://developer.android.com/topic/libraries/architecture/adding-components
    def nav_version = "1.0.0-alpha04"

    // use -ktx for Kotlin
    implementation "android.arch.navigation:navigation-fragment-ktx:$nav_version"
    implementation "android.arch.navigation:navigation-ui-ktx:$nav_version"
    androidTestImplementation "android.arch.navigation:navigation-testing-ktx:$nav_version"

    // Testing
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.0-alpha4'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha4'
}

Answer 1

原来 Android Studio Refactor > Migrate to AndroidX 中的重构工具没有正确迁移 BottomSheetBehaviour 的 XML。

旧位置是 android.support.design.widget.BottomSheetBehavior，未被迁移工具修改。原来的XML是：

<fragment
    android:id="@+id/player_bottom_sheet_fragment"
    android:name="app.rxsongbrowsertrials.ui.player.PlayerToggleFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:behavior_hideable="false"
    app:behavior_peekHeight="56dp"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
    />

新位置是com.google.android.material.bottomsheet.BottomSheetBehavior，所以布局需要变成：

<fragment
    android:id="@+id/player_bottom_sheet_fragment"
    android:name="app.rxsongbrowsertrials.ui.player.PlayerToggleFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:behavior_hideable="false"
    app:behavior_peekHeight="56dp"
    app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"
    />

Answer 2

你也可以替换

    app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"
or 
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior"

来自

app:layout_behavior="@string/bottom_sheet_behavior"

Answer 3

您必须导入 Google 提供的 Material Components Library。

Material Components for Android is a drop-in replacement for Android's Design Support Library.

加入你的build.gradle:

implementation 'com.google.android.material:material:x.x.x'

然后使用class com.google.android.material.bottomsheet.BottomSheetBehavior.

在您的布局中，您可以使用属性：

    app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"
    ..>

或

app:layout_behavior="@string/bottom_sheet_behavior"

Answer 4

我收到此错误消息：

Didn't find class "com.google.android.material.bottomsheet.BottomSheetBehaviour"

解决这个问题的唯一方法是更改 XML:

Change:

app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"

Change to:

app:layout_behavior="@string/bottom_sheet_behavior"

这解决了问题

Answer 5

对于 R class

com.google.android.material.R.id.design_bottom_sheet

而不是

android.support.design.R.id.design_bottom_sheet

BottomSheetBehavior 不在 androidX 库中

BottomSheetBehavior not in androidX libraries

android

bottom-sheet

material-components-android

androidx