add no image hint

app/src/main/java/com/maary/shareas/HistoryActivity.kt

@@ -184,8 +184,22 @@ class HistoryActivity : AppCompatActivity(){
         }
     }
 
+    @OptIn(DelicateCoroutinesApi::class)
     private fun showImages() {
         viewModel.loadImages()
+        GlobalScope.launch {
+            val list = withContext(Dispatchers.IO){
+                getUriList()
+            }
+            if (list.size == 0){
+                binding.layoutNoHistory.visibility = View.VISIBLE
+                binding.buttonClearAll.visibility = View.GONE
+            }else {
+                binding.layoutNoHistory.visibility = View.INVISIBLE
+                binding.buttonClearAll.visibility = View.VISIBLE
+            }
+        }
+
     }
 
     private fun openMediaStore() {

app/src/main/res/drawable/ic_no_image.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M18,15v4c0,0.55 -0.45,1 -1,1L5,20c-0.55,0 -1,-0.45 -1,-1L4,7c0,-0.55 0.45,-1 1,-1h3.02c0.55,0 1,-0.45 1,-1s-0.45,-1 -1,-1L4,4c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2v-5c0,-0.55 -0.45,-1 -1,-1s-1,0.45 -1,1zM15.5,18L6.52,18c-0.42,0 -0.65,-0.48 -0.39,-0.81l1.74,-2.23c0.2,-0.25 0.58,-0.26 0.78,-0.01l1.56,1.88 2.35,-3.02c0.2,-0.26 0.6,-0.26 0.79,0.01l2.55,3.39c0.25,0.32 0.01,0.79 -0.4,0.79zM19.3,8.89c0.48,-0.77 0.75,-1.67 0.69,-2.66 -0.13,-2.15 -1.84,-3.97 -3.97,-4.2C13.3,1.73 11,3.84 11,6.5c0,2.49 2.01,4.5 4.49,4.5 0.88,0 1.7,-0.26 2.39,-0.7l2.41,2.41c0.39,0.39 1.03,0.39 1.42,0 0.39,-0.39 0.39,-1.03 0,-1.42l-2.41,-2.4zM15.5,9C14.12,9 13,7.88 13,6.5S14.12,4 15.5,4 18,5.12 18,6.5 16.88,9 15.5,9z"/>
+</vector>

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

@@ -57,5 +57,35 @@
             android:clipToPadding="false"
             android:paddingTop="?attr/actionBarSize" />
 
+        <androidx.constraintlayout.widget.ConstraintLayout
+            android:id="@+id/layout_no_history"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical"
+            android:visibility="gone">
+
+            <ImageView
+                android:id="@+id/icon_no_history"
+                android:layout_width="128dp"
+                android:layout_height="128dp"
+                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintLeft_toLeftOf="parent"
+                app:layout_constraintRight_toRightOf="parent"
+                android:src="@drawable/ic_no_image"
+                app:tint="@color/colorAccent"/>
+
+            <TextView
+                android:layout_width="128dp"
+                android:layout_height="wrap_content"
+                android:text="@string/no_history"
+                android:layout_marginTop="16dp"
+                app:layout_constraintTop_toBottomOf="@id/icon_no_history"
+                app:layout_constraintLeft_toLeftOf="parent"
+                app:layout_constraintRight_toRightOf="parent"
+                android:textSize="16sp"/>
+
+        </androidx.constraintlayout.widget.ConstraintLayout>
+
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 </layout>

app/src/main/res/values/strings.xml

@@ -33,4 +33,5 @@
     <string name="delete_all">Delete All</string>
     <string name="delete_all_used_images">Delete all used wallpapers listed here.</string>
     <string name="delete_all_dialog_message">Delete all used wallpapers?</string>
+    <string name="no_history">It seems that the history folder is empy, try setting a new wallpaper!</string>
 </resources>