Saving state of motion layout

bgrebennikov · bgrebennikov · commit 19fdff2a8722 · 2022-04-17T14:26:07.000+04:00
diff --git a/app/src/main/java/com/github/bgrebennikov/devbuff/presentation/ui/customViews/SavingMotionLayout.kt b/app/src/main/java/com/github/bgrebennikov/devbuff/presentation/ui/customViews/SavingMotionLayout.kt
@@ -0,0 +1,37 @@
+package com.github.bgrebennikov.devbuff.presentation.ui.customViews
+
+import android.content.Context
+import android.os.Parcelable
+import android.util.AttributeSet
+import androidx.constraintlayout.motion.widget.MotionLayout
+import kotlinx.parcelize.Parcelize
+
+class SavingMotionLayout @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet?,
+    defStyleAttr: Int = 0
+) : MotionLayout(
+    context, attrs, defStyleAttr
+) {
+
+    override fun onSaveInstanceState(): Parcelable {
+        return SaveState(super.onSaveInstanceState(), startState, endState, targetPosition)
+    }
+
+    override fun onRestoreInstanceState(state: Parcelable?) {
+        (state as? SaveState)?.let {
+            super.onRestoreInstanceState(it.superParcel)
+            setTransition(it.startState, it.endState)
+            progress = it.progress
+        }
+    }
+
+    @Parcelize
+    private class SaveState(
+        val superParcel: Parcelable?,
+        val startState: Int,
+        val endState: Int,
+        val progress: Float
+    ) : Parcelable
+
+}
diff --git a/app/src/main/res/layout/fragment_idea_details.xml b/app/src/main/res/layout/fragment_idea_details.xml
@@ -18,13 +18,14 @@
 
     </data>
 
-    <androidx.constraintlayout.motion.widget.MotionLayout
+    <com.github.bgrebennikov.devbuff.presentation.ui.customViews.SavingMotionLayout
         android:id="@+id/constraintLayout3"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="@color/white"
         app:layoutDescription="@xml/fragment_idea_details_xml_scene"
         tools:context=".presentation.ui.fragments.IdeaDetailsFragment"
+        android:saveEnabled="true"
         >
 
 
@@ -161,5 +162,5 @@
 
 
 
-    </androidx.constraintlayout.motion.widget.MotionLayout>
+    </com.github.bgrebennikov.devbuff.presentation.ui.customViews.SavingMotionLayout>
 </layout>
