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garyscavonegaryscavone
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Merge pull request #317 from YellowLabrador/master
Added an Android Studio project
2 parents 6c5953b + 267d799 commit f86c652

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‎RtMidi.cpp

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@@ -4974,7 +4974,7 @@ static void androidOpenDevice(jobject deviceInfo, void* target, bool isOutput) {
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auto listenerClass = env->FindClass("com/yellowlab/rtmidi/MidiDeviceOpenedListener");
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if (!listenerClass) {
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LOGE(LOG_TAG, "Midi listener class not found com.yellowlab.rtmidi.MidiDeviceOpenedListener. Did you forget to add it to your APK?");
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LOGE("Midi listener class not found com.yellowlab.rtmidi.MidiDeviceOpenedListener. Did you forget to add it to your APK?");
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return;
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}
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@@ -5072,6 +5072,11 @@ std::string MidiInAndroid :: getPortName(unsigned int portNumber) {
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}
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void MidiInAndroid :: closePort() {
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// Don't try to close a port before it was open
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if (!reading) {
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return;
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}
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reading = false;
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pthread_join(readThread, NULL);
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‎android/.gitignore

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*.iml
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.gradle
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/local.properties
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/.idea/caches
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/.idea/libraries
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/.idea/modules.xml
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/.idea/workspace.xml
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/.idea/navEditor.xml
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/.idea/assetWizardSettings.xml
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx
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local.properties

‎android/README.md

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# Example Android Studio project
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Simple app using RtMidi. There are symlinks to 3 files in the main RtMidi project
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* RtMidi.cpp
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* RdMidi.h
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* MidiDeviceOpenedListener.java
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The main goal of this project is to demonstrate how to build RtMidi into an Android app. The
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app itself simply lists midi devices, opens the selected port and prints out any incoming packet
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![Screenshot](./images/midi.png)

‎android/app/.gitignore

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/build

‎android/app/build.gradle

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plugins {
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id 'com.android.application'
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id 'org.jetbrains.kotlin.android'
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}
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android {
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namespace 'com.rtmidi.yellowlab.midireader'
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compileSdk 33
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defaultConfig {
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applicationId "com.rtmidi.yellowlab.midireader"
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minSdk 31
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targetSdk 33
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
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vectorDrawables {
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useSupportLibrary true
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}
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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}
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debug {
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jniDebuggable true
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = '1.8'
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}
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buildFeatures {
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compose true
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}
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composeOptions {
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kotlinCompilerExtensionVersion '1.4.8'
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}
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packagingOptions {
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resources {
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excludes += '/META-INF/{AL2.0,LGPL2.1}'
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}
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}
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externalNativeBuild {
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cmake {
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path file('src/main/cpp/CMakeLists.txt')
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version '3.22.1'
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}
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}
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buildFeatures {
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viewBinding true
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}
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}
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dependencies {
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implementation 'androidx.core:core-ktx:1.10.1'
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implementation platform('org.jetbrains.kotlin:kotlin-bom:1.9.0')
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implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.6.1'
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implementation 'androidx.activity:activity-compose:1.7.2'
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implementation platform('androidx.compose:compose-bom:2023.06.01')
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implementation 'androidx.compose.ui:ui'
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implementation 'androidx.compose.ui:ui-graphics'
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implementation 'androidx.compose.ui:ui-tooling-preview'
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implementation 'androidx.compose.material3:material3'
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implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.1'
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implementation 'androidx.lifecycle:lifecycle-viewmodel-compose:2.6.1'
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testImplementation 'junit:junit:4.13.2'
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androidTestImplementation 'androidx.test.ext:junit:1.1.5'
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androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
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debugImplementation 'androidx.compose.ui:ui-tooling'
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debugImplementation 'androidx.compose.ui:ui-test-manifest'
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}

‎android/app/proguard-rules.pro

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

‎android/app/src/androidTest/java/com/rtmidi/yellowlab/midireader/ExampleInstrumentedTest.kt

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

‎android/app/src/main/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools">
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<application
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android:allowBackup="false"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="false"
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android:theme="@style/Theme.MidiReader"
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tools:targetApi="31">
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<activity
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android:name=".MainActivity"
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android:exported="true"
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android:label="@string/app_name"
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android:theme="@style/Theme.MidiReader">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎android/app/src/main/cpp/CMakeLists.txt

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# For more information about using CMake with Android Studio, read the
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# documentation: https://d.android.com/studio/projects/add-native-code.html
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# Sets the minimum version of CMake required to build the native library.
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cmake_minimum_required(VERSION 3.22.1)
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# Declares and names the project.
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project("midireader")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__AMIDI__")
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# Creates and names a library, sets it as either STATIC
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# or SHARED, and provides the relative paths to its source code.
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# You can define multiple libraries, and CMake builds them for you.
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# Gradle automatically packages shared libraries with your APK.
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add_library( # Sets the name of the library.
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midireader
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# Sets the library as a shared library.
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SHARED
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# Provides a relative path to your source file(s).
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RtMidi.cpp app-jni.cpp)
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# Searches for a specified prebuilt library and stores the path as a
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# variable. Because CMake includes system libraries in the search path by
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# default, you only need to specify the name of the public NDK library
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# you want to add. CMake verifies that the library exists before
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# completing its build.
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find_library( # Sets the name of the path variable.
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log-lib
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# Specifies the name of the NDK library that
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# you want CMake to locate.
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log)
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# Specifies libraries CMake should link to your target library. You
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# can link multiple libraries, such as libraries you define in this
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# build script, prebuilt third-party libraries, or system libraries.
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target_link_libraries( # Specifies the target library.
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midireader
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# Links the target library to the log library
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# included in the NDK.
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${log-lib} amidi nativehelper)

‎android/app/src/main/cpp/RtMidi.cpp

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../../../../../RtMidi.cpp

‎android/app/src/main/cpp/RtMidi.h

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../../../../../RtMidi.h

‎android/app/src/main/cpp/app-jni.cpp

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#include <jni.h>
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#include <string>
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#include "RtMidi.h"
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static RtMidiIn* midiLib = new RtMidiIn( RtMidi::Api::ANDROID_AMIDI );
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static jobject callbackObj = NULL;
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static jmethodID callbackMethod;
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static JavaVM* jvm;
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extern "C" JNIEXPORT jobjectArray JNICALL
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Java_com_rtmidi_yellowlab_midireader_MidiViewModel_portNames(
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JNIEnv* env,
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jobject /* this */) {
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auto portCount = midiLib->getPortCount();
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auto names = env->NewObjectArray(portCount, env->FindClass("java/lang/String"), NULL);
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for (int i=0; i<portCount; i++) {
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auto name = midiLib->getPortName(i);
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env->SetObjectArrayElement(names, i, env->NewStringUTF(name.c_str()));
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}
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return names;
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}
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static void midicallback( double deltatime, std::vector< unsigned char > *message, void */*userData*/ ) {
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unsigned int numBytes = message->size();
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JNIEnv* env;
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jvm->AttachCurrentThread(&env, NULL);
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// Allocate the Java array and fill with received data
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jbyteArray ret = env->NewByteArray(numBytes);
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env->SetByteArrayRegion(ret, 0, numBytes, (jbyte*)message);
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// send it to the (Java) callback
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env->CallVoidMethod(callbackObj, callbackMethod, deltatime, ret);
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}
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extern "C"
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JNIEXPORT void JNICALL
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Java_com_rtmidi_yellowlab_midireader_MidiViewModel_openPort(
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JNIEnv *env,
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jobject /* this */,
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jint port,
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jobject listener) {
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env->GetJavaVM(&jvm);
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midiLib->setCallback( midicallback );
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midiLib->openPort(port);
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if (callbackObj) env->DeleteGlobalRef(callbackObj);
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callbackObj = env->NewGlobalRef(listener);
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callbackMethod = env->GetMethodID(env->GetObjectClass(listener), "onMidiMessage", "(D[B)V");
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}
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extern "C" JNIEXPORT void JNICALL
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Java_com_rtmidi_yellowlab_midireader_MidiViewModel_closePort(
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JNIEnv *env,
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jobject /* this */) {
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midiLib->closePort();
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if (callbackObj) env->DeleteGlobalRef(callbackObj);
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callbackObj = NULL;
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callbackMethod = NULL;
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}

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