Question

我正在尝试通过双向数据绑定实现ImageView颜色更改。我希望得到与编写 android：src =“＃AAAAAA” 时相同的结果。

我的ViewModel：

class TeamsViewModel(application: Application) : BaseViewModel(application) {

    val teamOneName: MutableLiveData<String> = MutableLiveData("Team One")
    val teamOneColor: MutableLiveData<Int> = MutableLiveData()

    val teamTwoName: MutableLiveData<String> = MutableLiveData("Team Two")
    val teamTwoColor: MutableLiveData<Int> = MutableLiveData()
}

我的XML：

<de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/teamOneColorImageView"
        android:layout_width="32dp"
        android:layout_height="32dp"
        android:src="@={viewModel.teamOneColor}" />

我确切不知道如何实现颜色更改。我尝试过：

object DataBindingAdapter {

    @JvmStatic
    @InverseBindingAdapter(attribute = "android:src")
    fun ImageView.getColor(): Int {
        val colorDrawable = this.drawable as ColorDrawable
        return colorDrawable.color
    }

    @JvmStatic
    @BindingAdapter("android:src")
    fun ImageView.setColorx(color: Int?) {
        val colorValue = color ?: Color.RED
        val colorDrawable = ColorDrawable(colorValue)
        this.setImageDrawable(colorDrawable)
    }
}

但是我得到这个错误：

在视图类型'de.hdodenhof.circleimageview.CircleImageView'上找不到事件'android：srcAttrChanged'

接下来，我进行了研究，并尝试了这项研究：

object DataBindingAdapter {

    @JvmStatic
    @InverseBindingAdapter(attribute = "android:srcAttrChanged")
    fun ImageView.getColorx(): Int {
        val colorDrawable = this.drawable as ColorDrawable
        return colorDrawable.color
    }

    @JvmStatic
    @BindingAdapter("android:srcAttrChanged")
    fun ImageView.setColor(color: Int?) {
        val colorValue = color ?: Color.RED
        val colorDrawable = ColorDrawable(colorValue)
        this.setImageDrawable(colorDrawable)
    }

    @JvmStatic
    @BindingConversion
    fun convertColorToDrawable(color: Int): ColorDrawable? {
        return if (color != 0) ColorDrawable(color) else null
    }

    @JvmStatic
    @BindingConversion
    fun convertDrawableToColor(drawable: Drawable): Int {
        return (drawable as ColorDrawable).color
    }
}

再次，错误：

无法找到用于接受参数类型'java.lang.Integer'的吸气剂。如果绑定适配器提供了吸气剂，请检查适配器的批注是否正确以及参数类型是否匹配。

您在类似方面有任何经验并想帮助我吗？

使用双向数据绑定更改ImageView颜色

0 个答案: