Viewbinding with error: incompatible with attribute android:visibility

问题

I'm trying to set the visibility and the src of an ImageView using data binding. I don't know why this error is showing up, and I truely believe that this was working at one point, but I could be wrong.

Layout:

<data>
    <import type="android.view.View" />
    <import type="android.support.v4.content.ContextCompat" />
    <variable
        name="viewData"
        type="com.myapp.SomethingViewData" />
</data>
    ...
        <ImageView
            ...
            android:src="@{ContextCompat.getDrawable(context, viewData.getIconResource())}"
            android:visibility="@{viewData.getIconVisibility() ? View.VISIBLE : View.GONE}" />

Data class

@Parcelize
data class SomethingViewData(val iconResource: Int,
                             val iconVisibility: Boolean) : Parcelable

Error message:

error: '@{ContextCompat.getDrawable(context, viewData.getIconResource())}' is incompatible with attribute android:src (attr) reference|color.   
error: '@{viewData.getIconVisibility() ? View.VISIBLE : View.GONE}' is incompatible with attribute android:visibility (attr) enum [gone=2, invisible=1, visible=0]. 

What does this mean and how do I fix it?

回答1:

In my case a missing closing brace caused this error to pop up for me - I had:

android:visibility="@{moment.state == State.COMPLETE ? View.GONE : View.VISIBLE"

instead of:

android:visibility="@{moment.state == State.COMPLETE ? View.GONE : View.VISIBLE}"

回答2:

Wow, so, somehow dataBinding { enabled = true } was removed from my app modules build.gradle file. Adding it back and everything worked like before.

回答3:

Your "getIconVisibility" return an integer but android:visibility (in your XML file) need a enum value: Visibility.Gone | Visibility.Visible | Visibility.Invisible

回答4:

Try using single quotations in your src and visibility

android:src='@{ContextCompat.getDrawable(context, viewData.getIconResource())}'
android:visibility='@{viewData.getIconVisibility() ? View.VISIBLE : View.GONE}'

来源：https://stackoverflow.com/questions/53202846/viewbinding-with-error-incompatible-with-attribute-androidvisibility