add mpcore module, settings screen done

mpcore/.gitignore

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+/build

mpcore/build.gradle.kts

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+@Suppress("DSL_SCOPE_VIOLATION") // TODO: Remove once KTIJ-19369 is fixed
+plugins {
+    alias(libs.plugins.androidLibrary)
+    alias(libs.plugins.kotlinAndroid)
+}
+
+android {
+    namespace = "ru.megboyzz.mpcore"
+    compileSdk = 33
+
+    defaultConfig {
+        minSdk = 21
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles("consumer-rules.pro")
+        externalNativeBuild {
+            cmake {
+                cppFlags("-std=c++17")
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    externalNativeBuild {
+        cmake {
+            path("src/main/cpp/CMakeLists.txt")
+            version = "3.22.1"
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+
+    implementation(libs.core.ktx)
+    implementation(libs.appcompat)
+    implementation(libs.material)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.test.ext.junit)
+    androidTestImplementation(libs.espresso.core)
+}

mpcore/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

mpcore/src/androidTest/java/ru/megboyzz/mpcore/ExampleInstrumentedTest.kt

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+package ru.megboyzz.mpcore
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("ru.megboyzz.mpcore.test", appContext.packageName)
+    }
+}

mpcore/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+</manifest>

mpcore/src/main/cpp/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.22.1)
+
+project("mpcore")
+
+add_library(${CMAKE_PROJECT_NAME} SHARED
+        mpcore.cpp)
+
+target_link_libraries(${CMAKE_PROJECT_NAME}
+        android
+        log)

mpcore/src/main/cpp/mpcore.cpp

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+#include <jni.h>
+#include <string>
+
+extern "C" JNIEXPORT jstring JNICALL
+Java_ru_megboyzz_mpcore_NativeLib_stringFromJNI(
+        JNIEnv* env,
+        jobject /* this */) {
+    std::string hello = "Hello from C++";
+    return env->NewStringUTF(hello.c_str());
+}

mpcore/src/main/java/ru/megboyzz/mpcore/NativeLib.kt

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+package ru.megboyzz.mpcore
+
+class NativeLib {
+
+    external fun stringFromJNI(): String
+
+    companion object {
+        init {
+            System.loadLibrary("mpcore")
+        }
+    }
+}

mpcore/src/test/java/ru/megboyzz/mpcore/ExampleUnitTest.kt

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+package ru.megboyzz.mpcore
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}