Odtnhj

I have following branch in Bitbucket : https://bitbucket.org/ali-rezaei/tmdb/src/dataBinding/

I get following Kotlin compiler error when I build the project :

e: [kapt] An exception occurred: android.databinding.tool.util.LoggedErrorException: Found data binding errors.

Error is related to :

app:visibleGone="@isLoaded"

in the following layout :

<layout 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">

 <data>
 <variable
 name="isLoaded"
 type="boolean" />
 </data>

 <FrameLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".ui.MainActivity">

 <android.support.v4.widget.SwipeRefreshLayout
 android:id="@+id/swipe_refresh"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

 <android.support.v7.widget.RecyclerView
 android:id="@+id/list"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 app:visibleGone="@isLoaded" />

 </android.support.v4.widget.SwipeRefreshLayout>

 <include
 layout="@layout/network_state_item"
 app:visibleGone="@!isLoaded" />

 </FrameLayout>

</layout>

I appreciate if you can help me out.

The changes I would do are: Here

<variable
 name="isLoaded"
 type="boolean" />

Instead of passing boolean I would pass an instance of your VM

 <variable
 name="vm"
 type="com.sample.android.tmdb.ui.MovieViewModel" />

in your fragment, you do

 mBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_main, container, false)
 mBinding?.setVariable(BR.vm, mViewModel)
 mBinding?.setLifecycleOwner(this)

this way, your VM is connected to the lifecycle of your fragment.

Declare a method

 @BindingAdapter("visibleGone")
 fun View.visibleGone(visible: Boolean) 
 setVisibility(if (visible) View.VISIBLE else View.GONE)
 

declare a LiveData<Boolean> variable in you MovieViewModel and connect it in your layout. Eg.

 val loading: LiveData<Boolean>

then in your layout you could have

 <android.support.v7.widget.RecyclerView
 android:id="@+id/list"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 app:visibleGone="@!safeUnbox(vm.loading)" />