Simplifying app icon popup

> Using a single linearLayout instead of multiple nested views
> Using clipToOutline for rounded corners instead of using canvas.saveLayer
> Removing nested view elevations and overdraw
> Using LayoutTransition for animating layout changes, instead of manually creating animators

Change-Id: I8e57092f52ca5a032a2756594fdd39788acc5a0d

1 files changed, 28 insertions, 0 deletions

diff --git a/res/drawable/bg_notification_content.xml b/res/drawable/bg_notification_content.xml
new file mode 100644
index 000000000..cf129eba8
--- /dev/null
+++ b/res/drawable/bg_notification_content.xml
@@ -0,0 +1,28 @@
+<?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.
+-->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?attr/popupColorTertiary" />
+
+    <item android:height="3dp" android:top="0dp">
+        <shape>
+            <gradient
+                android:angle="270"
+                android:endColor="@android:color/transparent"
+                android:startColor="#33000000"
+                android:type="linear" />
+        </shape>
+    </item>
+</layer-list>