status of pics using BindingAdapter

nijuyonkadesu · Oct 5, 2022 · d514e9e · d514e9e
1 parent 03be245
commit d514e9e
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Showing 8 changed files with 34 additions and 4 deletions.
diff --git a/.gradle/7.4/executionHistory/executionHistory.lock b/.gradle/7.4/executionHistory/executionHistory.lock
diff --git a/.gradle/7.4/fileHashes/fileHashes.bin b/.gradle/7.4/fileHashes/fileHashes.bin
diff --git a/.gradle/7.4/fileHashes/fileHashes.lock b/.gradle/7.4/fileHashes/fileHashes.lock
diff --git a/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/.gradle/buildOutputCleanup/buildOutputCleanup.lock
diff --git a/.gradle/buildOutputCleanup/outputFiles.bin b/.gradle/buildOutputCleanup/outputFiles.bin
diff --git a/app/src/main/java/com/example/android/marsphotos/overview/BindingAdapters.kt b/app/src/main/java/com/example/android/marsphotos/overview/BindingAdapters.kt
@@ -1,5 +1,6 @@
 package com.example.android.marsphotos.overview
 
+import android.view.View
 import android.widget.ImageView
 import androidx.core.net.toUri
 import androidx.databinding.BindingAdapter
@@ -22,4 +23,20 @@ fun bindImage(imgView: ImageView, imgUrl: String?) {
 fun bindRecyclerView(recyclerView: RecyclerView, data: List<MarsPhoto>?) {
     val adapter = recyclerView.adapter as PhotoGridAdapter
     adapter.submitList(data) // tells recycler view when new list is available
+}
+@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
+        }
+    }
 }
diff --git a/app/src/main/java/com/example/android/marsphotos/overview/OverviewViewModel.kt b/app/src/main/java/com/example/android/marsphotos/overview/OverviewViewModel.kt
@@ -24,14 +24,16 @@ import com.example.android.marsphotos.network.MarsApi
 import com.example.android.marsphotos.network.MarsPhoto
 import kotlinx.coroutines.launch
 
+enum class MarsApiStatus { LOADING, ERROR, DONE }
+
 /**
  * The [ViewModel] that is attached to the [OverviewFragment].
  */
 class OverviewViewModel : ViewModel() {
 
     // The internal MutableLiveData that stores the status of the most recent request
-    private val _status = MutableLiveData<String>()
-    val status: LiveData<String> = _status
+    private val _status = MutableLiveData<MarsApiStatus>()
+    val status: LiveData<MarsApiStatus> = _status
 
     private val _photos = MutableLiveData<List<MarsPhoto>>()
     val photos: LiveData<List<MarsPhoto>> = _photos
@@ -49,12 +51,14 @@ class OverviewViewModel : ViewModel() {
      */
     private fun getMarsPhotos() {
         viewModelScope.launch {
+            _status.value = MarsApiStatus.LOADING
             try {
                 _photos.value = MarsApi.retrofitService.getPhotos()
-                _status.value = "Success: Mars properties retrieved"
+                _status.value = MarsApiStatus.DONE
             }
             catch (e: Exception){
-                _status.value = "Failure: ${e.message}"
+                _status.value = MarsApiStatus.ERROR
+                _photos.value = listOf() // clears RecyclerView
             }
         }
     }

diff --git a/app/src/main/res/layout/fragment_overview.xml b/app/src/main/res/layout/fragment_overview.xml
@@ -47,6 +47,15 @@
 
            tools:itemCount="16"
            tools:listitem="@layout/grid_view_item"/>
+        <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>