Add a binding adapter for the status ImageView

.idea/misc.xml

@@ -4,7 +4,7 @@
     <option name="filePathToZoomLevelMap">
       <map>
         <entry key="..\:/Users/Fair/Desktop/android-basics-kotlin-mars-photos-app-starter/app/src/main/res/drawable/ic_broken_image.xml" value="0.226" />
-        <entry key="..\:/Users/Fair/Desktop/android-basics-kotlin-mars-photos-app-starter/app/src/main/res/layout/fragment_overview.xml" value="0.33" />
+        <entry key="..\:/Users/Fair/Desktop/android-basics-kotlin-mars-photos-app-starter/app/src/main/res/layout/fragment_overview.xml" value="0.25" />
         <entry key="..\:/Users/Fair/Desktop/android-basics-kotlin-mars-photos-app-starter/app/src/main/res/layout/grid_view_item.xml" value="0.24048913043478262" />
       </map>
     </option>

app/src/main/java/com/example/android/marsphotos/overview/BindingAdapters.kt

 package com.example.android.marsphotos.overview
 
+import android.view.View
 import android.widget.ImageView
 import androidx.core.net.toUri
 import androidx.databinding.BindingAdapter
@@ -26,6 +27,24 @@ fun bindRecyclerView(recyclerView: RecyclerView,
     adapter.submitList(data)
 }
 
+@BindingAdapter("marsApiStatus")
+fun bindStatus(statusImageView: ImageView,
+               status: MarsApiStatus?) {
+    when (status) {
+        MarsApiStatus.LOADING -> {
+            statusImageView.visibility = View.VISIBLE
+            statusImageView.setImageResource(R.drawable.loading_animation)
+        }
+        MarsApiStatus.ERROR -> {
+            statusImageView.visibility = View.VISIBLE
+            statusImageView.setImageResource(R.drawable.ic_connection_error)
+        }
+        MarsApiStatus.DONE -> {
+            statusImageView.visibility = View.GONE
+        }
+    }
+}
+
 class BindingAdapters {
 
 }

app/src/main/res/layout/fragment_overview.xml

@@ -46,6 +46,15 @@
             tools:itemCount="16"
             tools:listitem="@layout/grid_view_item"
             app:spanCount="2" />
+        <ImageView
+            android:id="@+id/status_image"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:marsApiStatus="@{viewModel.status}" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>
 </layout>
\ No newline at end of file