android - ViewBinding 未在自定义 View 中显示 View

Question

我正在尝试在我添加到项目中的新模块中使用 ViewBinding，该模块将包含项目中的所有自定义 View 。

目前，这个模块是唯一实现 View 绑定(bind)的模块。主模块(app)，使用的是 kotlin 合成。

最初我有这两个自定义 View :

(Pre - ViewBinding --> 这是有效的。我可以在附加的 fragment 中看到它)

自定义 View 1:

import kotlinx.android.synthetic.main.layout_horizontal_filter.view.*

class HorizontalFiltersView @JvmOverloads constructor(
        context: Context,
        attrs: AttributeSet? = null,
        defStyleAttr: Int = 0
) : ConstraintLayout(context, attrs, defStyleAttr) {

    private val adapter: HorizontalFilterAdapter
    private val decoration: HorizontalFilterDecorator

    init {
        LayoutInflater.from(context).inflate(R.layout.layout_horizontal_filter, this, true)
        this.adapter = HorizontalFilterAdapter(context)
        this.decoration = HorizontalFilterDecorator(context, 16)

        recycler.layoutManager = LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
        recycler.adapter = this.adapter
        recycler.addItemDecoration(this.decoration)
        recycler.setHasFixedSize(true)
    }

    fun setFilters(filtersList: MutableList<HorizontalFilter>) {
        this.adapter.refresh(filtersList)
    }

}

自定义 View 2:

import kotlinx.android.synthetic.main.item_horizontal_filter.view.*
class HorizontalFilterItem @JvmOverloads constructor(
        context: Context,
        attrs: AttributeSet? = null,
        defStyleAttr: Int = 0
) : FrameLayout(context, attrs, defStyleAttr) {

    private var onClickAction: () -> Unit = {}

    init {
        LayoutInflater.from(context).inflate(R.layout.item_horizontal_filter, this, true)
        setOnClickListener { onClickAction.invoke() }
    }

    fun setData(image: Int, title: String, action: () -> Unit = {}) {
        filter_title.text = title
        loadImage(image)
        setClickAction(action)
    }

    fun setClickAction(action: () -> Unit) {
        this.onClickAction = action
    }

    private fun loadImage(image: Int?) {
        image?.let { img ->
            filter_image?.let { imView ->
                Glide.with(this).load(img).fitCenter().into(imView)
            }
        }
    }
}

然后我在 build.gradle 文件中添加了 viewBinding = true 并删除了 kotlin-android-extensions 插件。

所以海关看起来像:

class HorizontalFiltersView @JvmOverloads constructor(
        context: Context,
        attrs: AttributeSet? = null,
        defStyleAttr: Int = 0
) : ConstraintLayout(context, attrs, defStyleAttr) {

    private val adapter: HorizontalFilterAdapter
    private val decoration: HorizontalFilterDecorator
    private val binding = LayoutHorizontalFilterBinding.inflate(LayoutInflater.from(context))

    init {
        addView(binding.root)
        this.adapter = HorizontalFilterAdapter(context)
        this.decoration = HorizontalFilterDecorator(context, 16)

        binding.recycler.layoutManager = LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
        binding.recycler.adapter = this.adapter
        binding.recycler.addItemDecoration(this.decoration)
        binding.recycler.setHasFixedSize(true)
    }

    fun setFilters(filtersList: MutableList<HorizontalFilter>) {
        this.adapter.refresh(filtersList)
    }

}

class HorizontalFilterItem @JvmOverloads constructor(
        context: Context,
        attrs: AttributeSet? = null,
        defStyleAttr: Int = 0
) : FrameLayout(context, attrs, defStyleAttr) {

    private val binding = ItemHorizontalFilterBinding.inflate(LayoutInflater.from(context))
    private var onClickAction: () -> Unit = {}

    init {
        addView(binding.root)
        setOnClickListener { onClickAction.invoke() }
    }

    fun setData(image: Int, title: String, action: () -> Unit = {}) {
        binding.filterTitle.text = title
        loadImage(image)
        setClickAction(action)
    }

    fun setClickAction(action: () -> Unit) {
        this.onClickAction = action
    }

    private fun loadImage(image: Int?) {
        image?.let { img ->
            binding.filterImage.let { imView ->
                Glide.with(this).load(img).fitCenter().into(imView)
            }
        }
    }
}

到目前为止，一切正常。但是当我打开 fragment 时，不会显示自定义 View 。

总之:

使用 Kotlin 合成它可以工作并显示 View ；使用 ViewBinding 它不起作用。

怎么了？

Answer 1

尝试替换这一行:

    private val binding = LayoutHorizontalFilterBinding.inflate(LayoutInflater.from(context))

用这个:

    private val binding = LayoutHorizontalFilterBinding.inflate(LayoutInflater.from(context), this, true)