Added a blank screen when the favorites list is empty, the color of the icons is changed to black on the ActionBar in the ItemActivity, centered blank screen text in MainActivity.

app/src/main/java/ru/volgorobot/vrcatalog/additional/adapters/FavoritesListAdapter.java

@@ -20,4 +20,8 @@ public class FavoritesListAdapter extends ArrayAdapter<FavoritesListModel> {
         super.clear();
         super.addAll(db.selectAll());
     }
+
+    public int getArraySize() {
+        return db.selectAll().size();
+    }
 }

app/src/main/java/ru/volgorobot/vrcatalog/view/FavoritesActivity.java

@@ -1,6 +1,7 @@
 package ru.volgorobot.vrcatalog.view;
 
 import android.content.Intent;
+import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.Log;
@@ -8,7 +9,9 @@ import android.view.ContextMenu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
+import android.widget.ImageView;
 import android.widget.ListView;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import java.util.ArrayList;
@@ -22,10 +25,13 @@ import ru.volgorobot.vrcatalog.presenters.FavoritesPresenter;
 
 public class FavoritesActivity extends AppCompatActivity implements MainContract.FavoritesActivityView {
     private FavoritesDBPresenter db;
-    private ListView listView;
     private FavoritesListAdapter adapter;
     private MainContract.FavoritesPresenter mPresenter;
 
+    private ListView listView;
+    private ImageView favoritesEmptyImage;
+    private TextView favoritesEmptyText;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -33,10 +39,17 @@ public class FavoritesActivity extends AppCompatActivity implements MainContract
 
         mPresenter = new FavoritesPresenter(FavoritesActivity.this, this);
 
-        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        ActionBar actionBar = getSupportActionBar();
-        getSupportActionBar().setHomeButtonEnabled(true);
+        actionBar.setDisplayHomeAsUpEnabled(true);
+        actionBar.setHomeButtonEnabled(true);
+        actionBar.setTitle("Избранное");
 
         db = new FavoritesDBPresenter(FavoritesActivity.this);
+
+        initViews();
+    }
+
+    public void initViews() {
         listView = findViewById(R.id.favorites_list_view);
         registerForContextMenu(listView);
         listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@@ -46,10 +59,24 @@ public class FavoritesActivity extends AppCompatActivity implements MainContract
                 mPresenter.fetchItem(model.getItemID());
             }
         });
-
+        favoritesEmptyImage = findViewById(R.id.favorites_empty_image);
+        favoritesEmptyText = findViewById(R.id.favorites_empty_text);
         ArrayList<FavoritesListModel> models = db.selectAll();
         adapter = new FavoritesListAdapter(FavoritesActivity.this, android.R.layout.simple_list_item_1, models);
         listView.setAdapter(adapter);
+        checkForEmptyContent();
+    }
+
+    public void checkForEmptyContent() {
+        if(adapter.getArraySize() == 0) {
+            listView.setVisibility(View.GONE);
+            favoritesEmptyImage.setVisibility(View.VISIBLE);
+            favoritesEmptyText.setVisibility(View.VISIBLE);
+        } else {
+            listView.setVisibility(View.VISIBLE);
+            favoritesEmptyImage.setVisibility(View.INVISIBLE);
+            favoritesEmptyText.setVisibility(View.INVISIBLE);
+        }
     }
 
     @Override
@@ -117,5 +144,6 @@ public class FavoritesActivity extends AppCompatActivity implements MainContract
     protected void onResume() {
         super.onResume();
         updateListView();
+        checkForEmptyContent();
     }
 }

app/src/main/res/drawable/ic_favorite_border_black_24dp.xml

@@ -1,4 +1,4 @@
-<vector android:height="24dp" android:tint="#FFFFFF"
+<vector android:height="24dp" android:tint="#000000"
     android:viewportHeight="24.0" android:viewportWidth="24.0"
     android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
     <path android:fillColor="#FF000000" android:pathData="M16.5,3c-1.74,0 -3.41,0.81 -4.5,2.09C10.91,3.81 9.24,3 7.5,3 4.42,3 2,5.42 2,8.5c0,3.78 3.4,6.86 8.55,11.54L12,21.35l1.45,-1.32C18.6,15.36 22,12.28 22,8.5 22,5.42 19.58,3 16.5,3zM12.1,18.55l-0.1,0.1 -0.1,-0.1C7.14,14.24 4,11.39 4,8.5 4,6.5 5.5,5 7.5,5c1.54,0 3.04,0.99 3.57,2.36h1.87C13.46,5.99 14.96,5 16.5,5c2,0 3.5,1.5 3.5,3.5 0,2.89 -3.14,5.74 -7.9,10.05z"/>

app/src/main/res/drawable/ic_favorite_border_grey_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#D3D3D3"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M16.5,3c-1.74,0 -3.41,0.81 -4.5,2.09C10.91,3.81 9.24,3 7.5,3 4.42,3 2,5.42 2,8.5c0,3.78 3.4,6.86 8.55,11.54L12,21.35l1.45,-1.32C18.6,15.36 22,12.28 22,8.5 22,5.42 19.58,3 16.5,3zM12.1,18.55l-0.1,0.1 -0.1,-0.1C7.14,14.24 4,11.39 4,8.5 4,6.5 5.5,5 7.5,5c1.54,0 3.04,0.99 3.57,2.36h1.87C13.46,5.99 14.96,5 16.5,5c2,0 3.5,1.5 3.5,3.5 0,2.89 -3.14,5.74 -7.9,10.05z"/>
+</vector>

app/src/main/res/drawable/ic_favorite_red_24dp.xml

@@ -1,4 +1,4 @@
-<vector android:height="24dp" android:tint="#FFFFFF"
+<vector android:height="24dp" android:tint="#FF0000"
     android:viewportHeight="24.0" android:viewportWidth="24.0"
     android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
     <path android:fillColor="#FF000000" android:pathData="M12,21.35l-1.45,-1.32C5.4,15.36 2,12.28 2,8.5 2,5.42 4.42,3 7.5,3c1.74,0 3.41,0.81 4.5,2.09C13.09,3.81 14.76,3 16.5,3 19.58,3 22,5.42 22,8.5c0,3.78 -3.4,6.86 -8.55,11.54L12,21.35z"/>

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

@@ -1,14 +1,47 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.constraint.ConstraintLayout 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"
+    android:id="@+id/linearLayout"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".view.FavoritesActivity">
 
     <ListView
         android:id="@+id/favorites_list_view"
-        android:layout_width="match_parent"
+        android:layout_width="wrap_content"
-        android:layout_height="match_parent"/>
+        android:layout_height="wrap_content"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 
-</LinearLayout>
+    <ImageView
+        android:id="@+id/favorites_empty_image"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:layout_marginTop="70dp"
+        android:layout_marginBottom="52dp"
+        android:src="@drawable/ic_favorite_border_grey_24dp"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toTopOf="@+id/favorites_empty_text"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/favorites_empty_text"
+        android:layout_width="0dp"
+        android:layout_height="77dp"
+        android:layout_marginStart="9dp"
+        android:layout_marginEnd="9dp"
+        android:layout_marginBottom="68dp"
+        android:gravity="center"
+        android:text="@string/favorites_empty"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        android:textSize="24sp"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/favorites_empty_image" />
+
+</android.support.constraint.ConstraintLayout>

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

@@ -52,6 +52,8 @@
             android:text=""
             android:textAppearance="@style/TextAppearance.AppCompat.Medium"
             android:visibility="invisible"
+            android:textSize="18sp"
+            android:gravity="center"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"

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

@@ -11,7 +11,7 @@
     <item
         android:id="@+id/nav_favorites"
         android:icon="@drawable/ic_favorite_black_24dp"
-        android:title="Избранные" />
+        android:title="Избранное" />
     <item
         android:id="@+id/nav_settings"
         android:icon="@drawable/ic_settings_applications"

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

@@ -3,13 +3,13 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/action_favorite"
-        android:icon="@drawable/ic_favorite_border_white_24dp"
+        android:icon="@drawable/ic_favorite_border_black_24dp"
         app:showAsAction="always|collapseActionView"
         android:title="Добавить в избранные"
         android:visible="false"/>
     <item
         android:id="@+id/action_unfavorite"
-        android:icon="@drawable/ic_favorite_white_24dp"
+        android:icon="@drawable/ic_favorite_red_24dp"
         app:showAsAction="always|collapseActionView"
         android:title="Удалить из избранного"
         android:visible="false"/>

app/src/main/res/values-v21/styles.xml

@@ -22,7 +22,7 @@
         <item name="background">@android:color/transparent</item>
     </style>
     <style name="ItemActionBar" parent="ItemActivityTheme">
-        <item name="android:textColorPrimary">@android:color/white</item>
+        <item name="android:textColorPrimary">@android:color/black</item>
-        <item name="android:textColorSecondary">@android:color/white</item>
+        <item name="android:textColorSecondary">@android:color/black</item>
     </style>
 </resources>

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

@@ -1,5 +1,6 @@
 <resources>
-    <string name="app_name">VRCatalog</string>
+    <string name="app_name">uCatalog</string>
     <string name="navigation_drawer_open">Open navigation drawer</string>
     <string name="navigation_drawer_close">Close navigation drawer</string>
+    <string name="favorites_empty">Ваш список избранного пуст</string>
 </resources>

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

@@ -1,8 +1,5 @@
 <resources>
-
-    <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>
@@ -16,14 +13,24 @@
     <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
 
     <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
-
-    <style name="ItemActivityTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <item name="android:windowTranslucentStatus">true</item>
-    </style>
     <style name="AppTheme.Fullscreen">
         <item name="android:windowFullscreen">true</item>
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
+        <item name="android:windowTranslucentStatus">true</item>
+        <item name="android:windowTranslucentNavigation">true</item>
+    </style>
+    <style name="ItemActivityTheme" parent="AppTheme">
+        <item name="android:windowTranslucentStatus">true</item>
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+    <style name="TransparentActionBar" parent="Widget.AppCompat.ActionBar.Solid">
+        <item name="android:background">@android:color/transparent</item>
+        <item name="background">@android:color/transparent</item>
+    </style>
+    <style name="ItemActionBar" parent="ItemActivityTheme">
+        <item name="android:textColorPrimary">@android:color/black</item>
+        <item name="android:textColorSecondary">@android:color/black</item>
     </style>
-
 </resources>