ViewBinding - 不适用于子布局

Question

我目前正在使用 ViewBindings 更新源代码，但我没有让它们适用于以前工作的其他模块的子布局。我在Android Studio 4.1.3。我将viewBinding.enabled = true 添加到应用模块build.gradle。但是当我尝试从子布局中访问按钮时，它不会给出任何错误，但它也不会执行操作。

main_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000">

<com.playerview.TestPlayerView
    android:id="@+id/testPlayerView"
    android:layout_width="wrap_content"
    android:layout_height="0dp"
    app:v3PlaybackEnabled="true"
    app:always_show_go_to_live="true"
    app:extra_overlay_layout = "@array/extra_overlays"
    app:server_side_ad_overlay_index = "1"
    app:hide_play_pause_on_live="true"
    app:show_partner_logo="true"
    app:hide_seek_controllers_on_live="true"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:show_subtitle_on_full_screen="true" />

</androidx.constraintlayout.widget.ConstraintLayout>

FragmentBindingProvider.kt

class FragmentBindingProvider private constructor(
val btnPlayNext: Button?,
val testPlayerView: TestPlayerView,
val txtPlaylistPosition: TextView?,
val btnMute: ToggleButton?,
private val root: View
) : ViewBinding {

override fun getRoot(): View = root

companion object {
    fun inflate(isLogoView: Boolean, inflater: LayoutInflater, container: ViewGroup?): FragmentBindingProvider {
        return if (isLogoView) initLogo(inflater, container) else init(inflater, container)
    }

    private fun initLogo(inflater: LayoutInflater, container: ViewGroup?): FragmentBindingProvider {
        val binding = FragmentLogoBinding.inflate(inflater, container, false)
        return FragmentBindingProvider(
            btnPlayNext = binding.btnPlayNext,
            testPlayerView = binding.testPlayerView,
            txtPlaylistPosition = binding.txtPlaylistPosition,
            btnMute = binding.testPlayerView.findViewById(R.id.btnMute),
            root = binding.root
        )
    }
  }
}

player_video_controls.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:visibility="gone"
    tools:visibility="visible">

         <include
        android:id="@+id/player_volume_layout"
        layout="@layout/view_controls_volume"
        android:layout_width="@dimen/player_ad_volume_width"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="@id/bottom_bar"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@id/bottom_bar" />

</androidx.constraintlayout.widget.ConstraintLayout>

view_controls_volume.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    tools:background="@color/transparent_black_percent_80">

    <ToggleButton
        android:id="@+id/btnMute"
        android:layout_width="@dimen/top_controls_icon_width"
        android:layout_height="@dimen/top_controls_icon_height"
        android:layout_gravity="center"
        android:background="@drawable/ic_volume"
        android:contentDescription="@null"
        android:scaleType="center"
        android:checked="true"
        android:textOff=""
        android:textOn="" />

</FrameLayout>

MainFragment.kt

override fun onStart() {
    super.onStart()
    observeViewModel()

    /*Here calling view of child layout*/
    binding.btnMute?.setOnCheckedChangeListener { v, isChecked ->
        if (isChecked && binding.testPlayerView.isMuted()) {
            binding.testPlayerView.unmute()
        } else {
            binding.testPlayerView.mute()
        }
    }
}

如果有人知道，请告诉我。

Answer 1

只回答包含的布局在另一个模块的问题：

如果player_video_controls.xml 与player_video_controls.xml 不在同一个模块中，为了快速修复，请将其添加到同一个模块中，或者不包含它，而是添加布局本身（这很糟糕，但它有效）。

但是，如果您有很多此问题的实例，我建议您阅读此answer 并尝试在项目的每个模块中启用 ViewbBinding，这些模块是存在此问题的模块的直接或间接依赖项。

Answer 2

bindig.playerVolumeLayout.btnMute 你可以这样访问

Answer 3

而不是：

binding.testPlayerView.findViewById(R.id.btnMute),

在您的 FragmentBindingProvider.kt 中：

   binding.testPlayerView.btnMute

因为在您执行binding.btnMute? 之后，可能btnMute 为空并且不会触发setOnCheckedChangeListener。 如果不是解决方案，请将您的val btnMute: ToggleButton? 删除到val btnMute: ToggleButton 并通过binding.btnMute 删除binding.btnMute?。但是 nromaaly viewbinding 是 null 安全的，所以你的按钮有一个值。