Built and linked nlohmann::json package

app/build.gradle

@@ -32,6 +32,10 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
     externalNativeBuild {
         cmake {
             path "src/main/cpp/CMakeLists.txt"

app/src/main/AndroidManifest.xml

@@ -2,8 +2,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.mear">
 
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
-
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -11,6 +9,16 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity
+            android:name=".activities.DemoStreamActivity"
+            android:label="@string/title_activity_demo_stream"
+            android:theme="@style/AppTheme.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
         <activity
             android:name=".activities.SongViewActivity"
             android:label="@string/title_activity_song_view"
@@ -45,4 +53,6 @@
         <service android:name=".playback.service.MusicService" />
     </application>
 
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+
 </manifest>

app/src/main/cpp/CMakeLists.txt

@@ -15,6 +15,11 @@ set (HEADERS
         model/Song.h
         )
 
+set(JSON_BuildTests OFF CACHE INTERNAL "")
+
+
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/json)
+
 
 add_library( # Sets the name of the library.
              native-lib
@@ -47,7 +52,9 @@ find_library( # Sets the name of the path variable.
 
 target_link_libraries( # Specifies the target library.
                        native-lib
+        PRIVATE nlohmann_json::nlohmann_json
 
                        # Links the target library to the log library
                        # included in the NDK.
-                       ${log-lib} )
+                       ${log-lib}
+        )

app/src/main/cpp/Demo.cpp

@@ -15,17 +15,50 @@
 #include <android/sharedmem.h>
 #include <sys/mman.h>
 
+#include "nlohmann/json.hpp"
+
 #include "model/Song.h"
 
-int demoCall()
+model::Song initSong();
+
+int demoCall();
+
+void printSong(const model::Song&);
+
+
+model::Song initSong()
 {
     model::Song song;
     song.title = "hello";
     song.artist = "some artist";
+
+
+    return song;
+}
+
+
+int demoCall()
+{
+    model::Song song = initSong();
+
     std::cout << "testing" << std::endl;
+    printSong(song);
+
     return 0;
 }
 
+
+void printSong(const model::Song& song)
+{
+    std::cout << "\nsong information" << std::endl;
+    std::cout << "title: " << song.title << std::endl;
+    std::cout << "artist: " << song.artist << std::endl;
+    std::cout << "album: " << song.album << std::endl;
+    std::cout << "genre: " << song.genre << std::endl;
+    std::cout << "year: " << song.year << std::endl;
+}
+
+
 extern "C"
 JNIEXPORT void
         JNICALL
@@ -35,3 +68,13 @@ Java_com_example_mear_activities_MainActivity_test(
 
     demoCall();
 }
+
+extern "C"
+JNIEXPORT void
+JNICALL
+Java_com_example_mear_activities_DemoStreamActivity_test(
+        JNIEnv *env,
+        jobject /* this */) {
+
+    demoCall();
+}

app/src/main/java/com/example/mear/activities/DemoStreamActivity.kt

@@ -0,0 +1,37 @@
+package com.example.mear.activities
+
+import android.os.Bundle
+import android.support.design.widget.Snackbar
+import android.support.v7.app.AppCompatActivity
+import com.example.mear.R
+
+import kotlinx.android.synthetic.main.activity_demo_stream.*
+import kotlinx.android.synthetic.main.content_demo_stream.*
+
+class DemoStreamActivity : AppCompatActivity() {
+
+    companion object {
+        init {
+            System.loadLibrary("native-lib")
+        }
+    }
+
+
+    external fun test();
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_demo_stream)
+        setSupportActionBar(toolbar)
+
+        demoStream.setOnClickListener {
+            test()
+        }
+
+        fab.setOnClickListener {view ->
+            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
+                .setAction("Action", null).show()
+        }
+    }
+
+}

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

@@ -0,0 +1,33 @@
+<?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"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".activities.DemoStreamActivity">
+
+    <android.support.design.widget.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </android.support.design.widget.AppBarLayout>
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="@dimen/fab_margin"
+        app:srcCompat="@android:drawable/ic_dialog_email" />
+
+    <include layout="@layout/content_demo_stream" />
+
+</android.support.design.widget.CoordinatorLayout>

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

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:context=".activities.DemoStreamActivity"
+    tools:showIn="@layout/activity_demo_stream">
+
+    <Button
+        android:id="@+id/demoStream"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="140dp"
+        android:text="Stream"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.499" />
+</android.support.constraint.ConstraintLayout>

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

@@ -56,64 +56,22 @@
     <string name="pref_default_display_name">John Smith</string>
 
     <string name="pref_title_add_friends_to_messages">Add friends to messages</string>
-    <string-array name="pref_example_list_titles">
-        <item>Always</item>
-        <item>When possible</item>
-        <item>Never</item>
-    </string-array>
-    <string-array name="pref_example_list_values">
-        <item>1</item>
-        <item>0</item>
-        <item>-1</item>
-    </string-array>
+    <string name="pref_header_data_sync">Data &amp; sync</string>
+    <string name="pref_title_sync_frequency">Sync frequency</string>
 
     <!-- Example settings for Data & Sync -->
-    <string name="pref_header_data_sync">Data &amp; sync</string>
-
-    <string name="pref_title_sync_frequency">Sync frequency</string>
-    <string-array name="pref_sync_frequency_titles">
-        <item>15 minutes</item>
-        <item>30 minutes</item>
-        <item>1 hour</item>
-        <item>3 hours</item>
-        <item>6 hours</item>
-        <item>Never</item>
-    </string-array>
-    <string-array name="pref_sync_frequency_values">
-        <item>15</item>
-        <item>30</item>
-        <item>60</item>
-        <item>180</item>
-        <item>360</item>
-        <item>-1</item>
-    </string-array>
-
-    <string-array name="list_preference_entries">
-        <item>Entry 1</item>
-        <item>Entry 2</item>
-        <item>Entry 3</item>
-    </string-array>
-
-    <string-array name="list_preference_entry_values">
-        <item>1</item>
-        <item>2</item>
-        <item>3</item>
-    </string-array>
-
-    <string-array name="multi_select_list_preference_default_value" />
-
     <string name="pref_title_system_sync_settings">System sync settings</string>
 
-    <!-- Example settings for Notifications -->
     <string name="pref_header_notifications">Notifications</string>
-
     <string name="pref_title_new_message_notifications">New message notifications</string>
-
     <string name="pref_title_ringtone">Ringtone</string>
+
     <string name="pref_ringtone_silent">Silent</string>
 
     <string name="pref_title_vibrate">Vibrate</string>
+
     <string name="title_activity_song_view">SongViewActivity</string>
+
     <string name="large_text">
         "Material is the metaphor.\n\n"
 
@@ -203,4 +161,47 @@
         "For example, position the FAB to one side of stream of a cards so the FAB won’t interfere "
         "when a user tries to pick up one of cards.\n\n"
     </string>
+
+    <!-- Example settings for Notifications -->
+    <string name="title_activity_demo_stream">DemoStreamActivity</string>
+
+    <string-array name="pref_example_list_titles">
+        <item>Always</item>
+        <item>When possible</item>
+        <item>Never</item>
+    </string-array>
+
+    <string-array name="pref_example_list_values">
+        <item>1</item>
+        <item>0</item>
+        <item>-1</item>
+    </string-array>
+    <string-array name="pref_sync_frequency_titles">
+        <item>15 minutes</item>
+        <item>30 minutes</item>
+        <item>1 hour</item>
+        <item>3 hours</item>
+        <item>6 hours</item>
+        <item>Never</item>
+    </string-array>
+
+    <string-array name="pref_sync_frequency_values">
+        <item>15</item>
+        <item>30</item>
+        <item>60</item>
+        <item>180</item>
+        <item>360</item>
+        <item>-1</item>
+    </string-array>
+    <string-array name="list_preference_entries">
+        <item>Entry 1</item>
+        <item>Entry 2</item>
+        <item>Entry 3</item>
+    </string-array>
+    <string-array name="list_preference_entry_values">
+        <item>1</item>
+        <item>2</item>
+        <item>3</item>
+    </string-array>
+    <string-array name="multi_select_list_preference_default_value" />
 </resources>

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

@@ -8,8 +8,10 @@
         <item name="colorAccent">@color/colorAccent</item>
 
         <item name="android:popupMenuStyle">@style/PopupMenu</item>
-        <item name="android:textAppearanceSmallPopupMenu">@style/myPopupMenuTextAppearanceSmall</item>
-        <item name="android:textAppearanceLargePopupMenu">@style/myPopupMenuTextAppearanceLarge</item>
+        <item name="android:textAppearanceSmallPopupMenu">@style/myPopupMenuTextAppearanceSmall
+        </item>
+        <item name="android:textAppearanceLargePopupMenu">@style/myPopupMenuTextAppearanceLarge
+        </item>
     </style>
 
     <style name="PopupMenu" parent="@android:style/Widget.PopupMenu">