Allow to create/remove categories. Some refactoring.

app/src/main/res/layout/fragment_edit_categories.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <android.support.v7.widget.RecyclerView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/categories_list"
+        android:choiceMode="multipleChoice"
+        android:listSelector="@color/list_choice_pressed_bg_light" />
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:layout_gravity="end|bottom"
+        android:layout_margin="@dimen/fab_margin"
+        android:clickable="true"
+        android:src="@drawable/ic_action_add_18dp"
+        app:borderWidth="0dp"/>
+
+</android.support.design.widget.CoordinatorLayout>

app/src/main/res/layout/item_edit_categories.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                xmlns:tools="http://schemas.android.com/tools"
+                android:layout_width="match_parent"
+                android:layout_height="?android:attr/listPreferredItemHeightLarge"
+                android:paddingTop="@dimen/margin_top"
+                android:paddingBottom="@dimen/margin_bottom"
+                android:background="@drawable/selector_chapter_light">
+
+    <ImageView
+        android:id="@+id/image"
+        android:layout_width="50dp"
+        android:layout_height="50dp"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_centerInParent="true"
+        android:elevation="4dp"
+        android:clickable="true"
+        android:layout_marginLeft="@dimen/margin_left"
+        android:layout_marginStart="@dimen/margin_left"
+        android:layout_marginRight="@dimen/margin_right"
+        android:layout_marginEnd="@dimen/margin_right"/>
+
+    <TextView
+        android:id="@+id/title"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginRight="@dimen/margin_right"
+        android:layout_marginEnd="@dimen/margin_right"
+        android:layout_toRightOf="@id/image"
+        android:layout_toEndOf="@id/image"
+        android:layout_centerInParent="true"
+        android:ellipsize="end"
+        android:maxLines="1"
+        android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
+        android:textColor="@color/primary_text"
+        tools:text="Title"/>
+
+</RelativeLayout>

app/src/main/res/menu/category_selection.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item android:id="@+id/action_delete"
+          android:title="@string/action_delete"
+          android:icon="@drawable/ic_action_delete"
+          android:orderInCategory="1"
+          app:showAsAction="always"/>
+
+</menu>

app/src/main/res/menu/library.xml

@@ -1,17 +1,25 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">
+
     <item
         android:id="@+id/action_search"
         android:title="@string/action_search"
         android:icon="@drawable/ic_action_search"
         android:orderInCategory="100"
         app:showAsAction="collapseActionView|ifRoom"
-        app:actionViewClass="android.support.v7.widget.SearchView"/>
+        app:actionViewClass="android.support.v7.widget.SearchView" />
+
     <item
         android:id="@+id/action_refresh"
         android:title="@string/action_refresh"
         android:icon="@drawable/ic_action_refresh"
         android:orderInCategory="1"
         app:showAsAction="ifRoom" />
+
+    <item
+        android:id="@+id/action_edit_categories"
+        android:title="@string/action_edit_categories"
+        app:showAsAction="never" />
+
 </menu>

app/src/main/res/values/dimens.xml

@@ -2,6 +2,11 @@
     <!-- Default screen margins, per the Android Design guidelines. -->
     <dimen name="activity_horizontal_margin">16dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
+    <dimen name="margin_top">16dp</dimen>
+    <dimen name="margin_bottom">16dp</dimen>
+    <dimen name="margin_left">16dp</dimen>
+    <dimen name="margin_right">16dp</dimen>
+    <dimen name="fab_margin">16dp</dimen>
 
     <dimen name="text_headline">24sp</dimen>
     <dimen name="text_large_title">22sp</dimen>

app/src/main/res/values/strings.xml

@@ -1,12 +1,15 @@
 <resources>
     <string name="app_name">Mangafeed</string>
 
+    <string name="name">Name</string>
+
     <!-- Activities and fragments labels (toolbar title) -->
     <string name="label_settings">Settings</string>
     <string name="label_download_queue">Download queue</string>
     <string name="label_library">My library</string>
     <string name="label_recent_updates">Recent updates</string>
     <string name="label_catalogues">Catalogues</string>
+    <string name="label_selected">Selected: %1$d</string>
 
     <!-- Actions -->
     <string name="action_settings">Settings</string>
@@ -19,6 +22,8 @@
     <string name="action_delete">Delete</string>
     <string name="action_update">Update</string>
     <string name="action_edit">Edit</string>
+    <string name="action_add_category">Add category</string>
+    <string name="action_edit_categories">Edit categories</string>
     <string name="action_sort_up">Sort up</string>
     <string name="action_sort_down">Sort down</string>
     <string name="action_show_unread">Unread</string>
@@ -118,7 +123,6 @@
 
     <!-- Manga chapters fragment -->
     <string name="manga_chapters_tab">Chapters</string>
-    <string name="selected_chapters_title">Selected: %1$d</string>
     <string name="manga_chapter_no_title">No title</string>
     <string name="chapter_downloaded">Downloaded</string>
     <string name="chapter_queued">Queued</string>