quickstep/res/layout/task.xml

<?xml version="1.0" encoding="utf-8"?><!--
     Copyright (C) 2017 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->
<!-- NOTE! don't add dimensions for margins / paddings / sizes that change per orientation to this
     file, they need to be loaded at runtime. -->
<com.android.quickstep.views.TaskView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
    xmlns:launcher="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipChildren="false"
    android:defaultFocusHighlightEnabled="false"
    android:focusable="true"
    launcher:focusBorderColor="?androidprv:attr/materialColorOutline"
    launcher:hoverBorderColor="?androidprv:attr/materialColorPrimary">

    <com.android.quickstep.views.TaskThumbnailView
        android:id="@+id/snapshot"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <!-- Filtering affects only alpha instead of the visibility since visibility can be altered
         separately through RecentsView#resetFromSplitSelectionState() -->
    <ImageView
        android:id="@+id/show_windows"
        android:layout_height="@dimen/recents_filter_icon_size"
        android:layout_width="@dimen/recents_filter_icon_size"
        android:layout_gravity="end"
        android:alpha="0"
        android:tint="@color/recents_filter_icon"
        android:importantForAccessibility="no"
        android:src="@drawable/ic_select_windows" />

    <ViewStub
        android:id="@+id/icon"
        android:inflatedId="@id/icon"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content" />
</com.android.quickstep.views.TaskView>