Add swipe-to-dismiss notifications in popup menu.

- Next secondary icon animates up to replace dismissed main notification
- Add padding around main notification so it always aligns with the
  straight edges of the view (not the rounded corners); looks more
  dismissable
- Notification view collapses as notifications are dismissed
- To mimic system notification behavior, we copy SwipeHelper,
  FlingAnimationUtils, and Interpolators. We also apply elevation
  to notifications and reveal a darker color beneath when dismissing.

Bug: 32410600
Change-Id: I9fbf10e73bb4996f17ef061c856efb013967d972

2 files changed, 44 insertions, 0 deletions

diff --git a/res/drawable/bg_white_pill_bottom.xml b/res/drawable/bg_white_pill_bottom.xml
new file mode 100644
index 000000000..a1ea48cec
--- /dev/null
+++ b/res/drawable/bg_white_pill_bottom.xml
@@ -0,0 +1,22 @@
+<?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.
+-->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       android:shape="rectangle">
+    <solid android:color="#FFFFFF" />
+    <corners android:bottomLeftRadius="@dimen/bg_pill_radius"
+             android:bottomRightRadius="@dimen/bg_pill_radius" />
+</shape>
\ No newline at end of file
diff --git a/res/drawable/bg_white_pill_top.xml b/res/drawable/bg_white_pill_top.xml
new file mode 100644
index 000000000..9988b2913
--- /dev/null
+++ b/res/drawable/bg_white_pill_top.xml
@@ -0,0 +1,22 @@
+<?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.
+-->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       android:shape="rectangle">
+    <solid android:color="#FFFFFF" />
+    <corners android:topLeftRadius="@dimen/bg_pill_radius"
+             android:topRightRadius="@dimen/bg_pill_radius" />
+</shape>
\ No newline at end of file