Adding c++ to the mix

app/build.gradle

@@ -19,6 +19,12 @@ android {
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        externalNativeBuild {
+            cmake {
+                cppFlags "-std=c++14"
+            }
+        }
+
     }
     buildTypes {
         release {
@@ -26,22 +32,28 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    externalNativeBuild {
+        cmake {
+            path "src/main/cpp/CMakeLists.txt"
+            version "3.10.2"
+        }
+    }
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.50"
     implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support:support-v4:28.0.0'
     implementation 'com.android.support:design:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
     implementation "org.jetbrains.anko:anko:0.10.8"
-    implementation 'com.ealva:ealvatag:0.4.2'
-    implementation 'com.ealva:ealvalog:0.3.0'
-    implementation 'com.ealva:ealvalog-core:0.3.0'
-    implementation 'com.ealva:ealvalog-android:0.3.0'
-    implementation 'com.google.guava:guava:20.0'
-    implementation 'com.squareup.okio:okio:1.11.0'
+    implementation 'com.ealva:ealvatag:0.4.3'
+    implementation 'com.ealva:ealvalog:0.5.0'
+    implementation 'com.ealva:ealvalog-core:0.5.0'
+    implementation 'com.ealva:ealvalog-android:0.5.0'
+    implementation 'com.google.guava:guava:23.0'
+    implementation 'com.squareup.okio:okio:2.4.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

app/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,53 @@
+# For more information about using CMake with Android Studio, read the
+# documentation: https://d.android.com/studio/projects/add-native-code.html
+
+# Sets the minimum version of CMake required to build the native library.
+
+cmake_minimum_required(VERSION 3.4.1)
+
+# Creates and names a library, sets it as either STATIC
+# or SHARED, and provides the relative paths to its source code.
+# You can define multiple libraries, and CMake builds them for you.
+# Gradle automatically packages shared libraries with your APK.
+
+
+set (HEADERS
+        model/Song.h
+        )
+
+
+add_library( # Sets the name of the library.
+             native-lib
+
+             # Sets the library as a shared library.
+             SHARED
+
+             # Provides a relative path to your source file(s).
+             Demo.cpp
+             ${HEADERS}
+        )
+
+
+# Searches for a specified prebuilt library and stores the path as a
+# variable. Because CMake includes system libraries in the search path by
+# default, you only need to specify the name of the public NDK library
+# you want to add. CMake verifies that the library exists before
+# completing its build.
+
+find_library( # Sets the name of the path variable.
+              log-lib
+
+              # Specifies the name of the NDK library that
+              # you want CMake to locate.
+              log )
+
+# Specifies libraries CMake should link to your target library. You
+# can link multiple libraries, such as libraries you define in this
+# build script, prebuilt third-party libraries, or system libraries.
+
+target_link_libraries( # Specifies the target library.
+                       native-lib
+
+                       # Links the target library to the log library
+                       # included in the NDK.
+                       ${log-lib} )

app/src/main/cpp/Demo.cpp

@@ -0,0 +1,37 @@
+//
+// Created by brahmix on 9/26/19.
+//
+
+#include <iostream>
+#include <cstring>
+#include <jni.h>
+#include <string>
+#include <iomanip>
+#include <sstream>
+#include <fcntl.h>
+
+#include <android/asset_manager_jni.h>
+#include <android/log.h>
+#include <android/sharedmem.h>
+#include <sys/mman.h>
+
+#include "model/Song.h"
+
+int demoCall()
+{
+    model::Song song;
+    song.title = "hello";
+    song.artist = "some artist";
+    std::cout << "testing" << std::endl;
+    return 0;
+}
+
+extern "C"
+JNIEXPORT void
+        JNICALL
+Java_com_example_mear_activities_MainActivity_test(
+        JNIEnv *env,
+        jobject /* this */) {
+
+    demoCall();
+}

app/src/main/cpp/model/Song.h

@@ -0,0 +1,25 @@
+//
+// Created by brahmix on 9/26/19.
+//
+
+#ifndef MEAR_SONG_H
+#define MEAR_SONG_H
+
+#include <string>
+
+
+namespace model {
+
+struct Song
+{
+    int id;
+    std::string title;
+    std::string artist;
+    std::string album;
+    std::string genre;
+    int duration;
+    int year;
+};
+}
+
+#endif //MEAR_SONG_H

app/src/main/cpp/model/User.h

@@ -0,0 +1,18 @@
+//
+// Created by brahmix on 9/26/19.
+//
+
+#ifndef MEAR_USER_H
+#define MEAR_USER_H
+
+#include <string>
+
+namespace model {
+struct User
+{
+    std::string username;
+    std::string password;
+};
+}
+
+#endif //MEAR_USER_H

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

@@ -53,11 +53,15 @@ class MainActivity : BaseServiceActivity() {
     private var repeatOn: Boolean? = false
     private var shuffleOn: Boolean? = false
 
+    external fun test()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         setSupportActionBar(toolbar)
 
+        test()
+
         permissionPrompt()
 
         initialize()
@@ -407,4 +411,10 @@ class MainActivity : BaseServiceActivity() {
             }
         }
     }
+
+    companion object {
+        init {
+            System.loadLibrary("native-lib")
+        }
+    }
 }

build.gradle

@@ -8,7 +8,7 @@ buildscript {
         
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.2'
+        classpath 'com.android.tools.build:gradle:3.5.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

mear.iml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="mear" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="java-gradle" name="Java-Gradle">
+      <configuration>
+        <option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
+        <option name="BUILDABLE" value="false" />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>