Added animation on accept/hangup call arrows on CallIncomingActivity when screen is locked

app/src/main/java/org/linphone/activities/call/views/AnswerDeclineIncomingCallButtons.kt

@@ -19,12 +19,15 @@
  */
 package org.linphone.activities.call.views
 
+import android.animation.AnimatorSet
+import android.animation.ObjectAnimator
 import android.content.Context
 import android.util.AttributeSet
 import android.view.LayoutInflater
 import android.view.MotionEvent
 import android.view.View
 import android.view.View.OnTouchListener
+import android.view.animation.LinearInterpolator
 import android.widget.LinearLayout
 import androidx.databinding.DataBindingUtil
 import org.linphone.R
@@ -121,6 +124,7 @@ class AnswerDeclineIncomingCallButtons : LinearLayout {
         )
 
         updateSlideMode()
+        configureAnimation()
     }
 
     private fun updateSlideMode() {
@@ -131,4 +135,43 @@ class AnswerDeclineIncomingCallButtons : LinearLayout {
             binding.declineButton.setOnTouchListener(mDeclineTouchListener)
         }
     }
+
+    private fun configureAnimation() {
+        val accept1 = ObjectAnimator.ofFloat(binding.arrowAccept1, "alpha", 1f, 0.6f, 0.4f, 1f).apply {
+            repeatCount = ObjectAnimator.INFINITE
+            repeatMode = ObjectAnimator.RESTART
+        }
+
+        val accept2 = ObjectAnimator.ofFloat(binding.arrowAccept2, "alpha", 0.6f, 1f, 0.4f, 0.6f).apply {
+            repeatCount = ObjectAnimator.INFINITE
+            repeatMode = ObjectAnimator.RESTART
+        }
+
+        val accept3 = ObjectAnimator.ofFloat(binding.arrowAccept3, "alpha", 0.4f, 0.6f, 1f, 0.4f).apply {
+            repeatCount = ObjectAnimator.INFINITE
+            repeatMode = ObjectAnimator.RESTART
+        }
+
+        val hangup1 = ObjectAnimator.ofFloat(binding.arrowHangup1, "alpha", 1f, 0.6f, 0.4f, 1f).apply {
+            repeatCount = ObjectAnimator.INFINITE
+            repeatMode = ObjectAnimator.RESTART
+        }
+
+        val hangup2 = ObjectAnimator.ofFloat(binding.arrowHangup2, "alpha", 0.6f, 1f, 0.4f, 0.6f).apply {
+            repeatCount = ObjectAnimator.INFINITE
+            repeatMode = ObjectAnimator.RESTART
+        }
+
+        val hangup3 = ObjectAnimator.ofFloat(binding.arrowHangup3, "alpha", 0.4f, 0.6f, 1f, 0.4f).apply {
+            repeatCount = ObjectAnimator.INFINITE
+            repeatMode = ObjectAnimator.RESTART
+        }
+
+        AnimatorSet().apply {
+            duration = 2000
+            interpolator = LinearInterpolator()
+            playTogether(accept1, accept2, accept3, hangup1, hangup2, hangup3)
+            start()
+        }
+    }
 }

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

@@ -42,25 +42,25 @@
                 android:orientation="horizontal">
 
                 <ImageView
-                    android:id="@+id/arrow_hangup"
+                    android:id="@+id/arrow_hangup_1"
                     android:contentDescription="@string/content_description_slide_right_hangup"
                     android:src="@drawable/arrow_hangup"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"/>
 
                 <ImageView
+                    android:id="@+id/arrow_hangup_2"
                     android:src="@drawable/arrow_hangup"
                     android:contentDescription="@null"
                     android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
+                    android:layout_height="wrap_content"/>
-                    android:alpha="0.6"/>
 
                 <ImageView
+                    android:id="@+id/arrow_hangup_3"
                     android:src="@drawable/arrow_hangup"
                     android:contentDescription="@null"
                     android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
+                    android:layout_height="wrap_content"/>
-                    android:alpha="0.4"/>
 
             </LinearLayout>
 
@@ -88,20 +88,21 @@
                 android:orientation="horizontal">
 
                 <ImageView
+                    android:id="@+id/arrow_accept_3"
                     android:src="@drawable/arrow_accept"
                     android:contentDescription="@null"
                     android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
+                    android:layout_height="wrap_content"/>
-                    android:alpha="0.4"/>
 
                 <ImageView
+                    android:id="@+id/arrow_accept_2"
                     android:src="@drawable/arrow_accept"
                     android:contentDescription="@null"
                     android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
+                    android:layout_height="wrap_content"/>
-                    android:alpha="0.6"/>
 
                 <ImageView
+                    android:id="@+id/arrow_accept_1"
                     android:src="@drawable/arrow_accept"
                     android:contentDescription="@string/content_description_slide_left_answer"
                     android:layout_width="wrap_content"