Changes style of completed tasks (strike-through)

Author: JoseAlcerreca

app/src/main/java/com/example/android/architecture/blueprints/todoapp/tasks/TasksListBindings.kt

@@ -15,6 +15,8 @@
  */
 package com.example.android.architecture.blueprints.todoapp.tasks
 
+import android.graphics.Paint
+import android.widget.TextView
 import androidx.databinding.BindingAdapter
 import androidx.recyclerview.widget.RecyclerView
 import com.example.android.architecture.blueprints.todoapp.data.Task
@@ -26,3 +28,12 @@ import com.example.android.architecture.blueprints.todoapp.data.Task
 fun setItems(listView: RecyclerView, items: List<Task>) {
     (listView.adapter as TasksAdapter).submitList(items)
 }
+
+@BindingAdapter("app:completedTask")
+fun setStyle(textView: TextView, enabled: Boolean) {
+    if (enabled) {
+        textView.paintFlags = textView.paintFlags or Paint.STRIKE_THRU_TEXT_FLAG
+    } else {
+        textView.paintFlags = textView.paintFlags and Paint.STRIKE_THRU_TEXT_FLAG.inv()
+    }
+}

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

@@ -13,7 +13,8 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<layout xmlns:android="http://schemas.android.com/apk/res/android">
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <data>
 
@@ -31,7 +32,6 @@
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="?android:attr/listPreferredItemHeight"
-        android:background="@{task.completed ? @drawable/list_completed_touch_feedback : @drawable/touch_feedback}"
         android:orientation="horizontal"
         android:paddingLeft="@dimen/activity_horizontal_margin"
         android:paddingRight="@dimen/activity_horizontal_margin"
@@ -53,7 +53,9 @@
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/activity_horizontal_margin"
+            android:layout_marginStart="@dimen/activity_horizontal_margin"
             android:textAppearance="@style/TextAppearance.AppCompat.Title"
-            android:text="@{task.titleForList}" />
+            android:text="@{task.titleForList}"
+            app:completedTask="@{task.completed}" />
     </LinearLayout>
 </layout>