Quelle  call_answer_indicator.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="@drawable/call_activity_slider_background">

    <ImageView
        android:id="@+id/button_incoming_call_decline"
        android:layout_width="@dimen/incoming_call_widget_circle_size"
        android:layout_height="@dimen/incoming_call_widget_circle_size"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="5dp"
        android:background="@drawable/ic_circle_lockscreen_semi"
        android:clickable="false"
        android:contentDescription="@string/voip_reject"
        android:scaleType="center"
        app:srcCompat="@drawable/ic_call_end_outline"
        app:tint="@color/material_red" />

    <ImageView
        android:id="@+id/button_incoming_call_answer"
        android:layout_width="@dimen/incoming_call_widget_circle_size"
        android:layout_height="@dimen/incoming_call_widget_circle_size"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="5dp"
        android:background="@drawable/ic_circle_lockscreen_semi"
        android:clickable="false"
        android:contentDescription="@string/voip_accept"
        android:scaleType="center"
        app:srcCompat="@drawable/ic_phone_locked_outline"
        app:tint="@color/material_green" />

    <View
        android:id="@+id/dummy"
        android:layout_width="@dimen/incoming_call_widget_circle_size"
        android:layout_height="@dimen/incoming_call_widget_circle_size"
        android:layout_centerInParent="true"
        android:visibility="invisible" />

    <ImageView
        android:id="@+id/decline_arrow0"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_toLeftOf="@id/dummy"
        android:layout_centerVertical="true"
        android:scaleX="-1"
        app:tint="@android:color/white"
        android:src="@drawable/ic_next_alpha" />

    <ImageView
        android:id="@+id/decline_arrow1"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_toLeftOf="@id/dummy"
        android:layout_marginRight="9dp"
        android:layout_centerVertical="true"
        android:scaleX="-1"
        app:tint="@android:color/white"
        android:src="@drawable/ic_next_alpha" />

    <ImageView
        android:id="@+id/decline_arrow2"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_toLeftOf="@id/dummy"
        android:layout_marginRight="18dp"
        android:layout_centerVertical="true"
        android:scaleX="-1"
        app:tint="@android:color/white"
        android:src="@drawable/ic_next_alpha" />

    <ImageView
        android:id="@+id/answer_arrow0"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_toRightOf="@id/dummy"
        android:layout_centerVertical="true"
        app:tint="@android:color/white"
        android:src="@drawable/ic_next_alpha" />

    <ImageView
        android:id="@+id/answer_arrow1"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_toRightOf="@id/dummy"
        android:layout_centerVertical="true"
        android:layout_marginLeft="9dp"
        app:tint="@android:color/white"
        android:src="@drawable/ic_next_alpha" />

    <ImageView
        android:id="@+id/answer_arrow2"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_toRightOf="@id/dummy"
        android:layout_centerVertical="true"
        android:layout_marginLeft="18dp"
        app:tint="@android:color/white"
        android:src="@drawable/ic_next_alpha" />

</RelativeLayout>