Add bold effect to the selected button of wallpaper preview

- Also cleanup the wallpaper preview home/lockscreen button
- Mock: https://docs.google.com/presentation/d/15JadcGi5k1_0znUN_XdFpU7UxeXwxjK3Y7LxvhW5ETM/edit?ts=5eb5f9a8#slide=id.g7cc7612850_7_19
- Video: https://drive.google.com/file/d/1RmwwBov-KodRw65B48cBaBrJekZ6LmUr/view?usp=sharing

Test: Manually
Fixes: 158267263
Change-Id: I22ed252100d9a250953c59f3c3c38e253a558f42
diff --git a/res/color/full_preview_tab_text_color.xml b/res/color/full_preview_tab_text_color.xml
new file mode 100644
index 0000000..eecbccd
--- /dev/null
+++ b/res/color/full_preview_tab_text_color.xml
@@ -0,0 +1,24 @@
+<?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.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:state_selected="false"
+        android:color="?android:attr/textColorSecondary"/>
+    <item
+        android:state_selected="true"
+        android:color="?android:colorAccent" />
+</selector>
\ No newline at end of file
diff --git a/res/layout/fragment_image_preview_v2.xml b/res/layout/fragment_image_preview_v2.xml
index 42c5b5e..55c5eba 100644
--- a/res/layout/fragment_image_preview_v2.xml
+++ b/res/layout/fragment_image_preview_v2.xml
@@ -103,35 +103,7 @@
                     </com.android.wallpaper.picker.TouchForwardingLayout>
                 </androidx.constraintlayout.widget.ConstraintLayout>
 
-                <LinearLayout
-                    android:id="@+id/tabs_container"
-                    android:layout_width="match_parent"
-                    android:layout_height="@dimen/full_preview_page_tab_height"
-                    android:background="@color/fullscreen_preview_background"
-                    android:orientation="horizontal">
-                    <TextView
-                        android:id="@+id/home"
-                        android:layout_width="0dp"
-                        android:layout_height="match_parent"
-                        android:layout_weight="1"
-                        android:background="?android:attr/selectableItemBackgroundBorderless"
-                        android:paddingVertical="@dimen/full_preview_page_tab_padding_top"
-                        android:gravity="center"
-                        android:text="@string/home_screen_message"
-                        android:textColor="@color/bottom_action_button_color_tint"/>
-
-                    <TextView
-                        android:id="@+id/lock"
-                        android:layout_width="0dp"
-                        android:layout_height="match_parent"
-                        android:layout_weight="1"
-                        android:background="?android:attr/selectableItemBackgroundBorderless"
-                        android:paddingVertical="@dimen/full_preview_page_tab_padding_top"
-                        android:gravity="center"
-                        android:text="@string/lock_screen_message"
-                        android:textColor="@color/bottom_action_button_color_tint"/>
-
-                </LinearLayout>
+                <include layout="@layout/full_preview_tabs" />
             </LinearLayout>
         </FrameLayout>
 
diff --git a/res/layout/fragment_live_preview_v2.xml b/res/layout/fragment_live_preview_v2.xml
index b78b951..21c72ae 100644
--- a/res/layout/fragment_live_preview_v2.xml
+++ b/res/layout/fragment_live_preview_v2.xml
@@ -57,36 +57,7 @@
                 </com.android.wallpaper.picker.TouchForwardingLayout>
             </FrameLayout>
 
-            <LinearLayout
-                android:id="@+id/tabs_container"
-                android:layout_width="match_parent"
-                android:layout_height="@dimen/full_preview_page_tab_height"
-                android:background="@color/fullscreen_preview_background"
-                android:orientation="horizontal">
-
-                <TextView
-                    android:id="@+id/home"
-                    android:layout_width="0dp"
-                    android:layout_height="match_parent"
-                    android:layout_weight="1"
-                    android:background="?android:attr/selectableItemBackgroundBorderless"
-                    android:gravity="center"
-                    android:paddingTop="@dimen/full_preview_page_tab_padding_top"
-                    android:paddingBottom="@dimen/full_preview_page_tab_padding_bottom"
-                    android:text="@string/home_screen_message"
-                    android:textColor="@color/bottom_action_button_color_tint"/>
-                <TextView
-                    android:id="@+id/lock"
-                    android:layout_width="0dp"
-                    android:layout_height="match_parent"
-                    android:layout_weight="1"
-                    android:background="?android:attr/selectableItemBackgroundBorderless"
-                    android:gravity="center"
-                    android:paddingTop="@dimen/full_preview_page_tab_padding_top"
-                    android:paddingBottom="@dimen/full_preview_page_tab_padding_bottom"
-                    android:text="@string/lock_screen_message"
-                    android:textColor="@color/bottom_action_button_color_tint"/>
-            </LinearLayout>
+            <include layout="@layout/full_preview_tabs" />
         </LinearLayout>
 
         <FrameLayout
diff --git a/res/layout/full_preview_tabs.xml b/res/layout/full_preview_tabs.xml
new file mode 100644
index 0000000..0bc59f5
--- /dev/null
+++ b/res/layout/full_preview_tabs.xml
@@ -0,0 +1,45 @@
+<?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:id="@+id/tabs_container"
+    android:layout_width="match_parent"
+    android:layout_height="@dimen/full_preview_page_tab_height"
+    android:background="@color/fullscreen_preview_background"
+    android:orientation="horizontal">
+
+    <com.android.wallpaper.widget.SelectedBoldTextView
+        android:id="@+id/home"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:background="?android:attr/selectableItemBackgroundBorderless"
+        android:gravity="center"
+        android:paddingVertical="@dimen/full_preview_page_tab_padding_top"
+        android:text="@string/home_screen_message"
+        style="@style/SubtitleTextAppearance" />
+
+    <com.android.wallpaper.widget.SelectedBoldTextView
+        android:id="@+id/lock"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:background="?android:attr/selectableItemBackgroundBorderless"
+        android:gravity="center"
+        android:paddingVertical="@dimen/full_preview_page_tab_padding_top"
+        android:text="@string/lock_screen_message"
+        style="@style/SubtitleTextAppearance" />
+</LinearLayout>
diff --git a/src/com/android/wallpaper/widget/SelectedBoldTextView.java b/src/com/android/wallpaper/widget/SelectedBoldTextView.java
new file mode 100644
index 0000000..790734c
--- /dev/null
+++ b/src/com/android/wallpaper/widget/SelectedBoldTextView.java
@@ -0,0 +1,40 @@
+/*
+ * 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.
+ */
+package com.android.wallpaper.widget;
+
+import android.content.Context;
+import android.graphics.Typeface;
+import android.util.AttributeSet;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.widget.AppCompatTextView;
+
+import com.android.wallpaper.R;
+
+/** A TextView that would update the text style to bold when selected. */
+public class SelectedBoldTextView extends AppCompatTextView {
+
+    public SelectedBoldTextView(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        setTextColor(context.getColorStateList(R.color.full_preview_tab_text_color));
+    }
+
+    @Override
+    public void setSelected(boolean selected) {
+        super.setSelected(selected);
+        setTypeface(selected ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT);
+    }
+}