Add rotary reference app

This CL contains the base structure for the app. Rotary demo does not
work yet because FocusArea is not available yet.

Bug: 153470636
Test: make and install
Change-Id: I22ff278fff9ee280cf7f7e040b574ada1b79689a

10 files changed, 557 insertions, 0 deletions

diff --git a/RotaryPlayground/res/drawable/ic_launcher.png b/RotaryPlayground/res/drawable/ic_launcher.png
new file mode 100644
index 0000000..5d5dc1a
--- /dev/null
+++ b/RotaryPlayground/res/drawable/ic_launcher.png
diff --git a/RotaryPlayground/res/drawable/ic_launcher_background.xml b/RotaryPlayground/res/drawable/ic_launcher_background.xml
new file mode 100644
index 0000000..1cb2f28
--- /dev/null
+++ b/RotaryPlayground/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,186 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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
+  -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillColor="#26A69A"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8" />
+</vector>
diff --git a/RotaryPlayground/res/drawable/ic_launcher_foreground.xml b/RotaryPlayground/res/drawable/ic_launcher_foreground.xml
new file mode 100644
index 0000000..ca1f579
--- /dev/null
+++ b/RotaryPlayground/res/drawable/ic_launcher_foreground.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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
+  -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1" />
+</vector>
diff --git a/RotaryPlayground/res/layout/rotary_activity.xml b/RotaryPlayground/res/layout/rotary_activity.xml
new file mode 100644
index 0000000..bbe970c
--- /dev/null
+++ b/RotaryPlayground/res/layout/rotary_activity.xml
@@ -0,0 +1,33 @@
+<!--
+  ~ Copyright (C) 2020 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.
+  -->
+
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <FrameLayout
+        android:id="@+id/rotary_menu"
+        android:layout_width="@dimen/menu_width"
+        android:layout_height="match_parent" />
+
+    <FrameLayout
+        android:id="@+id/rotary_content"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:layout_width="0dp" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/RotaryPlayground/res/layout/rotary_cards.xml b/RotaryPlayground/res/layout/rotary_cards.xml
new file mode 100644
index 0000000..bdfa549
--- /dev/null
+++ b/RotaryPlayground/res/layout/rotary_cards.xml
@@ -0,0 +1,157 @@
+<!--
+  ~ Copyright (C) 2020 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.
+  -->
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_margin="16dp"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+        <EditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:singleLine="true">
+        </EditText>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <!-- A FocusArea with normal buttons with basic attributes. Upon nudging into this area,
+             the default focus should land on the first button in this container. Rotating the
+             rotary controller clockwise will move the focus from top to bottom.
+             Counterclockwise to move the focus from bottom to up. Nudge any direction to leave
+             this focus area. -->
+        <LinearLayout
+            android:id="@+id/card_normal"
+            android:background="@color/card_background_color"
+            android:layout_margin="16dp"
+            android:layout_width="300dp"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button" />
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button" />
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button" />
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button" />
+        </LinearLayout>
+
+        <!-- A FocusArea that contains a button with a default focus attribute. Upon nudging into
+             this area, the focus will land on the button with the default focus attribute.
+             Rotating the rotary controller clockwise will move the focus from top to bottom.
+             Counterclockwise to move the focus from bottom to up. Nudge any direction to leave
+             this focus area. -->
+        <LinearLayout
+            android:id="@+id/card_with_default_focus"
+            android:background="@color/card_background_color"
+            android:layout_margin="16dp"
+            android:layout_width="300dp"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button" />
+            <!-- TODO(b/154180719): Make this button the default focus in this FocusArea -->
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button (Default)" />
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button" />
+            <Button
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button" />
+        </LinearLayout>
+
+        <!-- A FocusArea that contains buttons with explicit ordering. Upon nudging into
+             this area, button_one will be focused. Rotating the rotary controller clockwise will
+             move the focus to button_two -> button_three -> button_four. Counterclockwise will
+             move the focus in the opposite order. Nudge any direction to leave this focus area. -->
+        <!-- TODO(b/154180719): Add explicit ordering to the buttons -->
+        <LinearLayout
+            android:id="@+id/card_with_explicit_order"
+            android:background="@color/card_background_color"
+            android:layout_margin="16dp"
+            android:layout_width="300dp"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+            <Button
+                android:id="@+id/button_one"
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button 1" />
+            <Button
+                android:id="@+id/button_three"
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button 3" />
+            <Button
+                android:id="@+id/button_two"
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button 2" />
+            <Button
+                android:id="@+id/button_four"
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:onClick="onRotaryCardsButtonClick"
+                android:tag="test_button"
+                android:text="Button 4" />
+        </LinearLayout>
+    </LinearLayout>
+</LinearLayout>
\ No newline at end of file
diff --git a/RotaryPlayground/res/layout/rotary_menu.xml b/RotaryPlayground/res/layout/rotary_menu.xml
new file mode 100644
index 0000000..40181bb
--- /dev/null
+++ b/RotaryPlayground/res/layout/rotary_menu.xml
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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.
+  -->
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <Button
+        android:id="@+id/cards_example"
+        android:layout_width="match_parent"
+        android:layout_height="50dp"
+        android:layout_marginTop="32dp"
+        android:text="Card Examples" />
+    <Button
+        android:id="@+id/menu_item_2"
+        android:layout_width="match_parent"
+        android:layout_height="50dp"
+        android:layout_marginTop="32dp"
+        android:text="Menu Item 2" />
+    <Button
+        android:id="@+id/menu_item_3"
+        android:layout_width="match_parent"
+        android:layout_height="50dp"
+        android:layout_marginTop="32dp"
+        android:text="Menu Item 3" />
+    <Button
+        android:id="@+id/menu_item_4"
+        android:layout_width="match_parent"
+        android:layout_height="50dp"
+        android:layout_marginTop="32dp"
+        android:text="Menu Item 4" />
+</LinearLayout>
diff --git a/RotaryPlayground/res/values/colors.xml b/RotaryPlayground/res/values/colors.xml
new file mode 100644
index 0000000..6636918
--- /dev/null
+++ b/RotaryPlayground/res/values/colors.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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
+  -->
+<resources>
+    <color name="card_background_color">#37393d</color>
+</resources>
\ No newline at end of file
diff --git a/RotaryPlayground/res/values/dimens.xml b/RotaryPlayground/res/values/dimens.xml
new file mode 100644
index 0000000..dece8ec
--- /dev/null
+++ b/RotaryPlayground/res/values/dimens.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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
+  -->
+<resources>
+    <!-- Rotary Menu values -->
+    <dimen name="menu_width">200dp</dimen>
+</resources>
\ No newline at end of file
diff --git a/RotaryPlayground/res/values/strings.xml b/RotaryPlayground/res/values/strings.xml
new file mode 100644
index 0000000..8fabdf9
--- /dev/null
+++ b/RotaryPlayground/res/values/strings.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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.
+  -->
+<resources>
+    <string name="app_name" translatable="false">Rotary Playground</string>
+</resources>
diff --git a/RotaryPlayground/res/values/themes.xml b/RotaryPlayground/res/values/themes.xml
new file mode 100644
index 0000000..02a0be9
--- /dev/null
+++ b/RotaryPlayground/res/values/themes.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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
+  -->
+<resources>
+    <style name="Theme.App" parent="android:Theme.DeviceDefault">
+        <item name="android:buttonStyle">@style/ButtonStyle</item>
+    </style>
+
+    <style name="ButtonStyle" parent="android:Widget.Button">
+        <item name="android:background">@android:color/transparent</item>
+        <item name="android:textColor">@android:color/white</item>
+    </style>
+</resources>
\ No newline at end of file