Backend abstraction + added android support + partial high DPI scaling + added missing files

2022-02-13 17:25:43 +01:00 · 2022-02-13 17:25:43 +01:00 · e9cb7fda42
commit e9cb7fda42
--- a/android/.gitignore
+++ b/android/.gitignore
@ -0,0 +1,12 @@
+.cxx
+.externalNativeBuild
+build/
+*.iml
+
+.idea
+.gradle
+local.properties
+
+# Android Studio puts a Gradle wrapper here, that we don't want:
+gradle/
+gradlew*
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@ -0,0 +1,64 @@
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 28
+    buildToolsVersion "30.0.3"
+    ndkVersion "23.0.7599858"
+    defaultConfig {
+        applicationId "org.sdrpp.sdrpp"
+        minSdkVersion 28
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.1.0"
+
+        externalNativeBuild {
+            cmake {
+                arguments "-DOPT_BACKEND_GLFW=OFF", "-DOPT_BACKEND_ANDROID=ON", "-DOPT_BUILD_SOAPY_SOURCE=OFF", "-DOPT_BUILD_ANDROID_AUDIO_SINK=ON", "-DOPT_BUILD_AUDIO_SINK=OFF", "-DOPT_BUILD_DISCORD_PRESENCE=OFF", "-DUSE_INTERNAL_LIBCORRECT=OFF"
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt')
+        }
+    }
+
+    externalNativeBuild {
+        cmake {
+            version "3.18.1"
+            path "../../CMakeLists.txt"
+        }
+    }
+
+    sourceSets {
+        main {
+            assets.srcDirs += ['assets']
+        }
+    }
+}
+
+task deleteTempAssets (type: Delete) {
+    delete 'assets'
+}
+
+task copyResources(type: Copy) {
+    description = 'Copy resources...'
+    from '../../root/'
+    into 'assets/'
+    include('**/*')
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'androidx.appcompat:appcompat:1.0.2'
+}
+
+copyResources.dependsOn deleteTempAssets
+preBuild.dependsOn copyResources
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.sdrpp.sdrpp">
+
+    <application
+        android:label="SDR++"
+        android:allowBackup="false"
+        android:fullBackupContent="false"
+        android:hasCode="true">
+
+        <activity
+            android:name="org.sdrpp.sdrpp.MainActivity"
+            android:icon="@mipmap/ic_launcher"
+            android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
+            android:configChanges="orientation|keyboardHidden|screenSize">
+            <meta-data android:name="android.app.lib_name" android:value="sdrpp_core" />
+
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <!-- <intent-filter>
+                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
+            </intent-filter>
+
+            <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" /> -->
+        </activity>
+    </application>
+
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>
--- a/android/app/src/main/java/DeviceManager.kt
+++ b/android/app/src/main/java/DeviceManager.kt
@ -0,0 +1,32 @@
+package org.sdrpp.sdrpp;
+
+import android.app.NativeActivity;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.pm.PackageManager;
+import android.hardware.usb.*;
+import android.Manifest;
+import android.os.Bundle;
+import android.view.View;
+import android.view.KeyEvent;
+import android.view.inputmethod.InputMethodManager;
+import android.util.Log;
+import android.content.res.AssetManager;
+
+import androidx.core.app.ActivityCompat;
+
+import androidx.core.content.PermissionChecker;
+
+import java.util.concurrent.LinkedBlockingQueue;
+import java.io.*;
+
+class DeviceManager {
+    public fun init() {
+        
+    }
+}
--- a/android/app/src/main/java/MainActivity.kt
+++ b/android/app/src/main/java/MainActivity.kt
@ -0,0 +1,192 @@
+package org.sdrpp.sdrpp;
+
+import android.app.NativeActivity;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.pm.PackageManager;
+import android.hardware.usb.*;
+import android.Manifest;
+import android.os.Bundle;
+import android.view.View;
+import android.view.KeyEvent;
+import android.view.inputmethod.InputMethodManager;
+import android.util.Log;
+import android.content.res.AssetManager;
+
+import androidx.core.app.ActivityCompat;
+
+import androidx.core.content.PermissionChecker;
+
+import java.util.concurrent.LinkedBlockingQueue;
+import java.io.*;
+
+private const val ACTION_USB_PERMISSION = "org.sdrpp.sdrpp.USB_PERMISSION";
+
+private val usbReceiver = object : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) {
+        if (ACTION_USB_PERMISSION == intent.action) {
+            synchronized(this) {
+                var _this = context as MainActivity;
+                _this.SDR_device = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE)
+                if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
+                    _this.SDR_conn = _this.usbManager!!.openDevice(_this.SDR_device);
+                    
+                    // Save SDR info
+                    _this.SDR_VID = _this.SDR_device!!.getVendorId();
+                    _this.SDR_PID = _this.SDR_device!!.getProductId()
+                    _this.SDR_FD = _this.SDR_conn!!.getFileDescriptor();
+                }
+                
+                // Whatever the hell this does
+                context.unregisterReceiver(this);
+
+                // Hide again the system bars
+                _this.hideSystemBars();
+            }
+        }
+    }
+}
+
+class MainActivity : NativeActivity() {
+    private val TAG : String = "SDR++";
+    public var usbManager : UsbManager? = null;
+    public var SDR_device : UsbDevice? = null;
+    public var SDR_conn : UsbDeviceConnection? = null;
+    public var SDR_VID : Int = -1;
+    public var SDR_PID : Int = -1;
+    public var SDR_FD : Int = -1;
+
+    fun checkAndAsk(permission: String) {
+        if (PermissionChecker.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(this, arrayOf(permission), 1);
+        }
+    }
+
+    public fun hideSystemBars() {
+        val decorView = getWindow().getDecorView();
+        val uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
+        decorView.setSystemUiVisibility(uiOptions);
+    }
+
+    public override fun onCreate(savedInstanceState: Bundle?) {
+        // Hide bars
+        hideSystemBars();
+
+        // Ask for required permissions, without these the app cannot run.
+        checkAndAsk(Manifest.permission.WRITE_EXTERNAL_STORAGE);
+        checkAndAsk(Manifest.permission.READ_EXTERNAL_STORAGE);
+
+        // TODO: Have the main code wait until these two permissions are available
+
+        // Register events
+        usbManager = getSystemService(Context.USB_SERVICE) as UsbManager;
+        val permissionIntent = PendingIntent.getBroadcast(this, 0, Intent(ACTION_USB_PERMISSION), 0)
+        val filter = IntentFilter(ACTION_USB_PERMISSION)
+        registerReceiver(usbReceiver, filter)
+
+        // Get permission for all USB devices
+        val devList = usbManager!!.getDeviceList();
+        for ((name, dev) in devList) {
+            usbManager!!.requestPermission(dev, permissionIntent);
+        }
+
+        // Ask for internet permission
+        checkAndAsk(Manifest.permission.INTERNET);
+
+        super.onCreate(savedInstanceState)
+    }
+
+    public override fun onResume() {
+        // Hide bars again
+        hideSystemBars();
+        super.onResume();
+    }
+
+    fun showSoftInput() {
+        val inputMethodManager = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager;
+        inputMethodManager.showSoftInput(window.decorView, 0);
+    }
+
+    fun hideSoftInput() {
+        val inputMethodManager = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager;
+        inputMethodManager.hideSoftInputFromWindow(window.decorView.windowToken, 0);
+        hideSystemBars();
+    }
+
+    // Queue for the Unicode characters to be polled from native code (via pollUnicodeChar())
+    private var unicodeCharacterQueue: LinkedBlockingQueue<Int> = LinkedBlockingQueue()
+
+    // We assume dispatchKeyEvent() of the NativeActivity is actually called for every
+    // KeyEvent and not consumed by any View before it reaches here
+    override fun dispatchKeyEvent(event: KeyEvent): Boolean {
+        if (event.action == KeyEvent.ACTION_DOWN) {
+            unicodeCharacterQueue.offer(event.getUnicodeChar(event.metaState))
+        }
+        return super.dispatchKeyEvent(event)
+    }
+
+    fun pollUnicodeChar(): Int {
+        return unicodeCharacterQueue.poll() ?: 0
+    }
+
+    public fun createIfDoesntExist(path: String) {
+        // This is a directory, create it in the filesystem
+        var folder = File(path);
+        var success = true;
+        if (!folder.exists()) {
+            success = folder.mkdirs();
+        }
+        if (!success) {
+            Log.e(TAG, "Could not create folder with path " + path);
+        }
+    }
+
+    public fun extractDir(aman: AssetManager, local: String, rsrc: String): Int {
+        val flist = aman.list(rsrc);
+        var ecount = 0;
+        for (fp in flist) {
+            val lpath = local + "/" + fp;
+            val rpath = rsrc + "/" + fp;
+
+            Log.w(TAG, "Extracting '" + rpath + "' to '" + lpath + "'");
+
+            // Create local path if non-existent
+            createIfDoesntExist(local);
+            
+            // Create if directory
+            val ext = extractDir(aman, lpath, rpath);
+
+            // Extract if file
+            if (ext == 0) {
+                // This is a file, extract it
+                val _os = FileOutputStream(lpath);
+                val _is = aman.open(rpath);
+                val ilen = _is.available();
+                var fbuf = ByteArray(ilen);
+                _is.read(fbuf, 0, ilen);
+                _os.write(fbuf);
+                _os.close();
+                _is.close();
+            }
+
+            ecount++;
+        }
+        return ecount;
+    }
+
+    public fun getAppDir(): String {
+        val fdir = getFilesDir().getAbsolutePath();
+
+        // Extract all resources to the app directory
+        val aman = getAssets();
+        extractDir(aman, fdir + "/res", "res");
+        createIfDoesntExist(fdir + "/modules");
+
+        return fdir;
+    }
+}
--- a/android/app/src/main/res/mipmap/ic_launcher.png
+++ b/android/app/src/main/res/mipmap/ic_launcher.png
--- a/android/app/src/main/res/xml/device_filter.xml
+++ b/android/app/src/main/res/xml/device_filter.xml
@ -0,0 +1,53 @@
+<resources>
+
+    <!-- RTL-SDR -->
+    <usb-device vendor-id="0x0bda" product-id="0x2832" />
+    <usb-device vendor-id="0x0bda" product-id="0x2838" />
+    <usb-device vendor-id="0x0413" product-id="0x6680" />
+    <usb-device vendor-id="0x0413" product-id="0x6f0f" />
+    <usb-device vendor-id="0x0458" product-id="0x707f" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00a9" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00b3" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00b4" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00b5" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00b7" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00b8" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00b9" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00c0" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00c6" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00d3" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00d7" />
+    <usb-device vendor-id="0x0ccd" product-id="0x00e0" />
+    <usb-device vendor-id="0x1554" product-id="0x5020" />
+    <usb-device vendor-id="0x15f4" product-id="0x0131" />
+    <usb-device vendor-id="0x15f4" product-id="0x0133" />
+    <usb-device vendor-id="0x185b" product-id="0x0620" />
+    <usb-device vendor-id="0x185b" product-id="0x0650" />
+    <usb-device vendor-id="0x185b" product-id="0x0680" />
+    <usb-device vendor-id="0x1b80" product-id="0xd393" />
+    <usb-device vendor-id="0x1b80" product-id="0xd394" />
+    <usb-device vendor-id="0x1b80" product-id="0xd395" />
+    <usb-device vendor-id="0x1b80" product-id="0xd397" />
+    <usb-device vendor-id="0x1b80" product-id="0xd398" />
+    <usb-device vendor-id="0x1b80" product-id="0xd39d" />
+    <usb-device vendor-id="0x1b80" product-id="0xd3a4" />
+    <usb-device vendor-id="0x1b80" product-id="0xd3a8" />
+    <usb-device vendor-id="0x1b80" product-id="0xd3af" />
+    <usb-device vendor-id="0x1b80" product-id="0xd3b0" />
+    <usb-device vendor-id="0x1d19" product-id="0x1101" />
+    <usb-device vendor-id="0x1d19" product-id="0x1102" />
+    <usb-device vendor-id="0x1d19" product-id="0x1103" />
+    <usb-device vendor-id="0x1d19" product-id="0x1104" />
+    <usb-device vendor-id="0x1f4d" product-id="0xa803" />
+    <usb-device vendor-id="0x1f4d" product-id="0xb803" />
+    <usb-device vendor-id="0x1f4d" product-id="0xc803" />
+    <usb-device vendor-id="0x1f4d" product-id="0xd286" />
+    <usb-device vendor-id="0x1f4d" product-id="0xd803" />
+
+    <!-- Airspy One -->
+    <usb-device vendor-id="0x1d50" product-id="0x60a1" />
+
+    <!-- Airspy HF+ -->
+    <usb-device vendor-id="0x03EB" product-id="0x800C" />
+
+</resources>
--- a/android/build.gradle
+++ b/android/build.gradle
@ -0,0 +1,22 @@
+buildscript {
+    ext.kotlin_version = '1.4.31'
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
--- a/android/gradle.properties
+++ b/android/gradle.properties
@ -0,0 +1 @@
+android.useAndroidX=true
--- a/android/settings.gradle
+++ b/android/settings.gradle
@ -0,0 +1 @@
+include ':app'
--- a/core/backends/android/android_backend.h
+++ b/core/backends/android/android_backend.h
@ -0,0 +1,17 @@
+#pragma once
+#include <vector>
+#include <stdint.h>
+
+namespace backend {
+    struct DevVIDPID {
+        uint16_t vid;
+        uint16_t pid;
+    };
+
+    extern const std::vector<DevVIDPID> AIRSPY_VIDPIDS;
+    extern const std::vector<DevVIDPID> AIRSPYHF_VIDPIDS;
+    extern const std::vector<DevVIDPID> HACKRF_VIDPIDS;
+    extern const std::vector<DevVIDPID> RTL_SDR_VIDPIDS;
+
+    int getDeviceFD(int& vid, int& pid, const std::vector<DevVIDPID>& allowedVidPids);
+}
--- a/core/backends/android/backend.cpp
+++ b/core/backends/android/backend.cpp
@ -0,0 +1,490 @@
+#include <backend.h>
+#include "android_backend.h"
+#include <core.h>
+#include <gui/gui.h>
+#include "imgui.h"
+#include "imgui_impl_android.h"
+#include "imgui_impl_opengl3.h"
+#include <android/log.h>
+#include <android_native_app_glue.h>
+#include <android/asset_manager.h>
+#include <EGL/egl.h>
+#include <GLES3/gl3.h>
+#include <stdint.h>
+#include <spdlog/sinks/android_sink.h>
+#include <gui/icons.h>
+#include <gui/style.h>
+#include <gui/menus/theme.h>
+#include <filesystem>
+#include <options.h>
+
+// Credit to the ImGui android OpenGL3 example for a lot of this code!
+
+namespace backend {
+    struct android_app* app = NULL;
+    EGLDisplay _EglDisplay = EGL_NO_DISPLAY;
+    EGLSurface _EglSurface = EGL_NO_SURFACE;
+    EGLContext _EglContext = EGL_NO_CONTEXT;
+    bool _Initialized = false;
+    char _LogTag[] = "SDR++";
+    bool initialized = false;
+    bool pauseRendering = false;
+    bool exited = false;
+
+    // Forward declaration
+    int ShowSoftKeyboardInput();
+    int PollUnicodeChars();
+
+    void doPartialInit() {
+        backend::init();
+        style::loadFonts(options::opts.root + "/res"); // TODO: Don't hardcode, use config
+        icons::load(options::opts.root + "/res");
+        thememenu::applyTheme();
+        ImGui::GetStyle().ScaleAllSizes(style::uiScale);
+        gui::mainWindow.setFirstMenuRender();
+    }
+
+    void handleAppCmd(struct android_app* app, int32_t appCmd) {
+        switch (appCmd) {
+        case APP_CMD_SAVE_STATE:
+            spdlog::warn("APP_CMD_SAVE_STATE");
+            break;
+        case APP_CMD_INIT_WINDOW:
+            spdlog::warn("APP_CMD_INIT_WINDOW");
+            if (pauseRendering && !exited) {
+                doPartialInit();
+                pauseRendering = false;
+            }
+            exited = false;
+            break;
+        case APP_CMD_TERM_WINDOW:
+            spdlog::warn("APP_CMD_TERM_WINDOW");
+            pauseRendering = true;
+            backend::end();
+            break;
+        case APP_CMD_GAINED_FOCUS:
+            spdlog::warn("APP_CMD_GAINED_FOCUS");
+            break;
+        case APP_CMD_LOST_FOCUS:
+            spdlog::warn("APP_CMD_LOST_FOCUS");
+            break;
+        }
+    }
+
+    int32_t handleInputEvent(struct android_app* app, AInputEvent* inputEvent) {
+        return ImGui_ImplAndroid_HandleInputEvent(inputEvent);
+    }
+
+    int aquireWindow() {
+        while (!app->window) {
+            spdlog::warn("Waiting on the shitty window thing"); std::this_thread::sleep_for(std::chrono::milliseconds(30));
+            int out_events;
+            struct android_poll_source* out_data;
+
+            while (ALooper_pollAll(0, NULL, &out_events, (void**)&out_data) >= 0) {
+                // Process one event
+                if (out_data != NULL) { out_data->process(app, out_data); }
+
+                // Exit the app by returning from within the infinite loop
+                if (app->destroyRequested != 0) {
+                    return -1;
+                }
+            }
+        }
+        ANativeWindow_acquire(app->window);
+        return 0;
+    }
+
+    int init(std::string resDir) {
+        spdlog::warn("Backend init");
+
+        // Get window
+        aquireWindow();
+
+        // EGL Init
+        {
+            _EglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+            if (_EglDisplay == EGL_NO_DISPLAY)
+                __android_log_print(ANDROID_LOG_ERROR, _LogTag, "%s", "eglGetDisplay(EGL_DEFAULT_DISPLAY) returned EGL_NO_DISPLAY");
+
+            if (eglInitialize(_EglDisplay, 0, 0) != EGL_TRUE)
+                __android_log_print(ANDROID_LOG_ERROR, _LogTag, "%s", "eglInitialize() returned with an error");
+
+            const EGLint egl_attributes[] = { EGL_BLUE_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_RED_SIZE, 8, EGL_DEPTH_SIZE, 24, EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_NONE };
+            EGLint num_configs = 0;
+            if (eglChooseConfig(_EglDisplay, egl_attributes, nullptr, 0, &num_configs) != EGL_TRUE)
+                __android_log_print(ANDROID_LOG_ERROR, _LogTag, "%s", "eglChooseConfig() returned with an error");
+            if (num_configs == 0)
+                __android_log_print(ANDROID_LOG_ERROR, _LogTag, "%s", "eglChooseConfig() returned 0 matching config");
+
+            // Get the first matching config
+            EGLConfig egl_config;
+            eglChooseConfig(_EglDisplay, egl_attributes, &egl_config, 1, &num_configs);
+            EGLint egl_format;
+            eglGetConfigAttrib(_EglDisplay, egl_config, EGL_NATIVE_VISUAL_ID, &egl_format);
+            ANativeWindow_setBuffersGeometry(app->window, 0, 0, egl_format);
+
+            const EGLint egl_context_attributes[] = { EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE };
+            _EglContext = eglCreateContext(_EglDisplay, egl_config, EGL_NO_CONTEXT, egl_context_attributes);
+
+            if (_EglContext == EGL_NO_CONTEXT)
+                __android_log_print(ANDROID_LOG_ERROR, _LogTag, "%s", "eglCreateContext() returned EGL_NO_CONTEXT");
+
+            _EglSurface = eglCreateWindowSurface(_EglDisplay, egl_config, app->window, NULL);
+            eglMakeCurrent(_EglDisplay, _EglSurface, _EglSurface, _EglContext);
+        }
+
+        // Setup Dear ImGui context
+        IMGUI_CHECKVERSION();
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        (void)io;
+
+        // Disable loading/saving of .ini file from disk.
+        // FIXME: Consider using LoadIniSettingsFromMemory() / SaveIniSettingsToMemory() to save in appropriate location for Android.
+        io.IniFilename = NULL;
+
+        // Setup Platform/Renderer backends
+        ImGui_ImplAndroid_Init(app->window);
+        ImGui_ImplOpenGL3_Init("#version 300 es");
+
+        return 0;
+    }
+
+    void beginFrame() {
+        // Start the Dear ImGui frame
+        ImGui_ImplOpenGL3_NewFrame();
+        ImGui_ImplAndroid_NewFrame();
+        ImGui::NewFrame();
+    }
+
+    void render(bool vsync) {
+        // Rendering
+        ImGui::Render();
+        auto dSize = ImGui::GetIO().DisplaySize;
+        glViewport(0, 0, dSize.x, dSize.y);
+        glClearColor(gui::themeManager.clearColor.x, gui::themeManager.clearColor.y, gui::themeManager.clearColor.z, gui::themeManager.clearColor.w);
+        glClear(GL_COLOR_BUFFER_BIT);
+        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+        eglSwapBuffers(_EglDisplay, _EglSurface);
+    }
+
+    // No screen pos to detect
+    void getMouseScreenPos(double& x, double& y) { x = 0; y = 0; }
+    void setMouseScreenPos(double x, double y) {}
+
+    int renderLoop() {
+        spdlog::warn("BRUH: {0}", (void*)backend::app->window);
+        while (true) {
+            int out_events;
+            struct android_poll_source* out_data;
+
+            while (ALooper_pollAll(0, NULL, &out_events, (void**)&out_data) >= 0) {
+                // Process one event
+                if (out_data != NULL) { out_data->process(app, out_data); }
+
+                // Exit the app by returning from within the infinite loop
+                if (app->destroyRequested != 0) {
+                    spdlog::warn("ASKED TO EXIT");
+                    exited = true;
+
+                    // Stop SDR
+                    gui::mainWindow.setPlayState(false);
+                    return 0;
+                }
+            }
+
+            if (_EglDisplay == EGL_NO_DISPLAY) { continue; }
+
+            if (!pauseRendering) {
+                // Initiate a new frame
+                ImGuiIO& io = ImGui::GetIO();
+                auto dsize = io.DisplaySize;
+
+                // Poll Unicode characters via JNI
+                // FIXME: do not call this every frame because of JNI overhead
+                PollUnicodeChars();
+
+                // Open on-screen (soft) input if requested by Dear ImGui
+                static bool WantTextInputLast = false;
+                if (io.WantTextInput && !WantTextInputLast)
+                ShowSoftKeyboardInput();
+                WantTextInputLast = io.WantTextInput;
+
+                // Render
+                beginFrame();
+                
+                if (dsize.x > 0 && dsize.y > 0) {
+                    ImGui::SetNextWindowPos(ImVec2(0, 0));
+                    ImGui::SetNextWindowSize(ImVec2(dsize.x, dsize.y));
+                    gui::mainWindow.draw();
+                }
+                render();
+            }
+            else {
+                std::this_thread::sleep_for(std::chrono::milliseconds(30));
+            }
+        }
+
+        return 0;
+    }
+
+    int end() {
+        // Cleanup
+        ImGui_ImplOpenGL3_Shutdown();
+        ImGui_ImplAndroid_Shutdown();
+        ImGui::DestroyContext();
+
+        // Destroy all
+        if (_EglDisplay != EGL_NO_DISPLAY) {
+            eglMakeCurrent(_EglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+            if (_EglContext != EGL_NO_CONTEXT) { eglDestroyContext(_EglDisplay, _EglContext); }
+            if (_EglSurface != EGL_NO_SURFACE) { eglDestroySurface(_EglDisplay, _EglSurface); }
+            eglTerminate(_EglDisplay);
+        }
+
+        _EglDisplay = EGL_NO_DISPLAY;
+        _EglContext = EGL_NO_CONTEXT;
+        _EglSurface = EGL_NO_SURFACE;
+
+        if (app->window) { ANativeWindow_release(app->window); }
+
+        return 0;
+    }
+
+    int ShowSoftKeyboardInput() {
+        JavaVM* java_vm = app->activity->vm;
+        JNIEnv* java_env = NULL;
+
+        jint jni_return = java_vm->GetEnv((void**)&java_env, JNI_VERSION_1_6);
+        if (jni_return == JNI_ERR)
+            return -1;
+
+        jni_return = java_vm->AttachCurrentThread(&java_env, NULL);
+        if (jni_return != JNI_OK)
+            return -2;
+
+        jclass native_activity_clazz = java_env->GetObjectClass(app->activity->clazz);
+        if (native_activity_clazz == NULL)
+            return -3;
+
+        jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "showSoftInput", "()V");
+        if (method_id == NULL)
+            return -4;
+
+        java_env->CallVoidMethod(app->activity->clazz, method_id);
+
+        jni_return = java_vm->DetachCurrentThread();
+        if (jni_return != JNI_OK)
+            return -5;
+
+        return 0;
+    }
+
+    int getDeviceFD(int& vid, int& pid, const std::vector<DevVIDPID>& allowedVidPids) {
+        JavaVM* java_vm = app->activity->vm;
+        JNIEnv* java_env = NULL;
+
+        jint jni_return = java_vm->GetEnv((void**)&java_env, JNI_VERSION_1_6);
+        if (jni_return == JNI_ERR)
+            return -1;
+
+        jni_return = java_vm->AttachCurrentThread(&java_env, NULL);
+        if (jni_return != JNI_OK)
+            return -1;
+
+        jclass native_activity_clazz = java_env->GetObjectClass(app->activity->clazz);
+        if (native_activity_clazz == NULL)
+            return -1;
+
+        jfieldID fd_field_id = java_env->GetFieldID(native_activity_clazz, "SDR_FD", "I");
+        jfieldID vid_field_id = java_env->GetFieldID(native_activity_clazz, "SDR_VID", "I");
+        jfieldID pid_field_id = java_env->GetFieldID(native_activity_clazz, "SDR_PID", "I");
+        
+        if (!vid_field_id || !vid_field_id || !pid_field_id)
+            return -1;
+
+        int fd = java_env->GetIntField(app->activity->clazz, fd_field_id);
+        vid = java_env->GetIntField(app->activity->clazz, vid_field_id);
+        pid = java_env->GetIntField(app->activity->clazz, pid_field_id);
+
+        jni_return = java_vm->DetachCurrentThread();
+        if (jni_return != JNI_OK)
+            return -1;
+
+        // If no vid/pid was given, just return successfully
+        if (allowedVidPids.empty()) {
+            return fd;
+        }
+
+        // Otherwise, check that the vid/pid combo is allowed
+        for (auto const& vp : allowedVidPids) {
+            if (vp.vid != vid || vp.pid != pid) { continue; }
+            return fd;
+        }
+
+        return -1;
+    }
+
+    // Unfortunately, the native KeyEvent implementation has no getUnicodeChar() function.
+    // Therefore, we implement the processing of KeyEvents in MainActivity.kt and poll
+    // the resulting Unicode characters here via JNI and send them to Dear ImGui.
+    int PollUnicodeChars() {
+        JavaVM* java_vm = app->activity->vm;
+        JNIEnv* java_env = NULL;
+
+        jint jni_return = java_vm->GetEnv((void**)&java_env, JNI_VERSION_1_6);
+        if (jni_return == JNI_ERR)
+            return -1;
+
+        jni_return = java_vm->AttachCurrentThread(&java_env, NULL);
+        if (jni_return != JNI_OK)
+            return -2;
+
+        jclass native_activity_clazz = java_env->GetObjectClass(app->activity->clazz);
+        if (native_activity_clazz == NULL)
+            return -3;
+
+        jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "pollUnicodeChar", "()I");
+        if (method_id == NULL)
+            return -4;
+
+        // Send the actual characters to Dear ImGui
+        ImGuiIO& io = ImGui::GetIO();
+        jint unicode_character;
+        while ((unicode_character = java_env->CallIntMethod(app->activity->clazz, method_id)) != 0)
+            io.AddInputCharacter(unicode_character);
+
+        jni_return = java_vm->DetachCurrentThread();
+        if (jni_return != JNI_OK)
+            return -5;
+
+        return 0;
+    }
+
+    std::string getAppFilesDir() {
+        JavaVM* java_vm = app->activity->vm;
+        JNIEnv* java_env = NULL;
+
+        jint jni_return = java_vm->GetEnv((void**)&java_env, JNI_VERSION_1_6);
+        if (jni_return == JNI_ERR)
+            throw std::runtime_error("Could not get JNI environement");
+
+        jni_return = java_vm->AttachCurrentThread(&java_env, NULL);
+        if (jni_return != JNI_OK)
+            throw std::runtime_error("Could not attach to thread");
+
+        jclass native_activity_clazz = java_env->GetObjectClass(app->activity->clazz);
+        if (native_activity_clazz == NULL)
+            throw std::runtime_error("Could not get MainActivity class");
+
+        jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "getAppDir", "()Ljava/lang/String;");
+        if (method_id == NULL)
+            throw std::runtime_error("Could not get methode ID");
+
+        jstring jstr = (jstring)java_env->CallObjectMethod(app->activity->clazz, method_id);
+
+        const char* _str = java_env->GetStringUTFChars(jstr, NULL);
+        std::string str(_str);
+        java_env->ReleaseStringUTFChars(jstr, _str);
+
+        jni_return = java_vm->DetachCurrentThread();
+        if (jni_return != JNI_OK)
+            throw std::runtime_error("Could not detach from thread");
+
+        
+        return str;
+    }
+
+    const std::vector<DevVIDPID> AIRSPY_VIDPIDS = {
+        { 0x1d50, 0x60a1 }
+    };
+
+    const std::vector<DevVIDPID> AIRSPYHF_VIDPIDS = {
+        { 0x03EB, 0x800C }
+    };
+
+    const std::vector<DevVIDPID> HACKRF_VIDPIDS = {
+        { 0x1d50, 0x604b },
+        { 0x1d50, 0x6089 },
+        { 0x1d50, 0xcc15 }
+    };
+
+    const std::vector<DevVIDPID> RTL_SDR_VIDPIDS = {
+        { 0x0bda, 0x2832 },
+        { 0x0bda, 0x2838 },
+        { 0x0413, 0x6680 },
+        { 0x0413, 0x6f0f },
+        { 0x0458, 0x707f },
+        { 0x0ccd, 0x00a9 },
+        { 0x0ccd, 0x00b3 },
+        { 0x0ccd, 0x00b4 },
+        { 0x0ccd, 0x00b5 },
+        { 0x0ccd, 0x00b7 },
+        { 0x0ccd, 0x00b8 },
+        { 0x0ccd, 0x00b9 },
+        { 0x0ccd, 0x00c0 },
+        { 0x0ccd, 0x00c6 },
+        { 0x0ccd, 0x00d3 },
+        { 0x0ccd, 0x00d7 },
+        { 0x0ccd, 0x00e0 },
+        { 0x1554, 0x5020 },
+        { 0x15f4, 0x0131 },
+        { 0x15f4, 0x0133 },
+        { 0x185b, 0x0620 },
+        { 0x185b, 0x0650 },
+        { 0x185b, 0x0680 },
+        { 0x1b80, 0xd393 },
+        { 0x1b80, 0xd394 },
+        { 0x1b80, 0xd395 },
+        { 0x1b80, 0xd397 },
+        { 0x1b80, 0xd398 },
+        { 0x1b80, 0xd39d },
+        { 0x1b80, 0xd3a4 },
+        { 0x1b80, 0xd3a8 },
+        { 0x1b80, 0xd3af },
+        { 0x1b80, 0xd3b0 },
+        { 0x1d19, 0x1101 },
+        { 0x1d19, 0x1102 },
+        { 0x1d19, 0x1103 },
+        { 0x1d19, 0x1104 },
+        { 0x1f4d, 0xa803 },
+        { 0x1f4d, 0xb803 },
+        { 0x1f4d, 0xc803 },
+        { 0x1f4d, 0xd286 },
+        { 0x1f4d, 0xd803 }
+    };
+}
+
+extern "C" {
+    void android_main(struct android_app* app) {
+        // Save app instance
+        app->onAppCmd = backend::handleAppCmd;
+        app->onInputEvent = backend::handleInputEvent;
+        backend::app = app;
+
+        // Check if this is the first time we run or not
+        if (backend::initialized) {
+            spdlog::warn("android_main called again");
+            backend::doPartialInit();
+            backend::pauseRendering = false;
+            backend::renderLoop();
+            return;
+        }
+        backend::initialized = true;
+       
+        // prepare spdlog
+        auto console_sink = std::make_shared<spdlog::sinks::android_sink_st>("SDR++");
+        auto logger = std::shared_ptr<spdlog::logger>(new spdlog::logger("", { console_sink }));
+        spdlog::set_default_logger(logger);
+
+        // Grab files dir
+        std::string appdir = backend::getAppFilesDir();
+
+        // Call main
+        char* rootpath = new char[appdir.size() + 1];
+        strcpy(rootpath, appdir.c_str());
+        char* dummy[] = { "", "-r", rootpath };
+        sdrpp_main(3, dummy);
+    }
+}
--- a/core/backends/android/imgui/imgui_impl_android.cpp
+++ b/core/backends/android/imgui/imgui_impl_android.cpp
@ -0,0 +1,187 @@
+// dear imgui: Platform Binding for Android native app
+// This needs to be used along with the OpenGL 3 Renderer (imgui_impl_opengl3)
+
+// Implemented features:
+//  [X] Platform: Keyboard arrays indexed using AKEYCODE_* codes, e.g. ImGui::IsKeyPressed(AKEYCODE_SPACE).
+// Missing features:
+//  [ ] Platform: Clipboard support.
+//  [ ] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
+//  [ ] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. FIXME: Check if this is even possible with Android.
+// Important:
+//  - FIXME: On-screen keyboard currently needs to be enabled by the application (see examples/ and issue #3446)
+//  - FIXME: Unicode character inputs needs to be passed by Dear ImGui by the application (see examples/ and issue #3446)
+
+// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. 
+// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
+// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
+// Read online: https://github.com/ocornut/imgui/tree/master/docs
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2021-03-04: Initial version.
+
+#include "imgui.h"
+#include "imgui_impl_android.h"
+#include <time.h>
+#include <map>
+#include <queue>
+#include <android/native_window.h>
+#include <android/input.h>
+#include <android/keycodes.h>
+#include <android/log.h>
+
+// Android data
+static double                                   g_Time = 0.0;
+static ANativeWindow*                           g_Window;
+static char                                     g_LogTag[] = "ImGuiExample";
+static std::map<int32_t, std::queue<int32_t>>   g_KeyEventQueues; // FIXME: Remove dependency on map and queue once we use upcoming input queue.
+
+int32_t ImGui_ImplAndroid_HandleInputEvent(AInputEvent* input_event)
+{
+    ImGuiIO& io = ImGui::GetIO();
+    int32_t event_type = AInputEvent_getType(input_event);
+    switch (event_type)
+    {
+    case AINPUT_EVENT_TYPE_KEY:
+    {
+        int32_t event_key_code = AKeyEvent_getKeyCode(input_event);
+        int32_t event_action = AKeyEvent_getAction(input_event);
+        int32_t event_meta_state = AKeyEvent_getMetaState(input_event);
+
+        io.KeyCtrl = ((event_meta_state & AMETA_CTRL_ON) != 0);
+        io.KeyShift = ((event_meta_state & AMETA_SHIFT_ON) != 0);
+        io.KeyAlt = ((event_meta_state & AMETA_ALT_ON) != 0);
+
+        switch (event_action)
+        {
+        // FIXME: AKEY_EVENT_ACTION_DOWN and AKEY_EVENT_ACTION_UP occur at once as soon as a touch pointer
+        // goes up from a key. We use a simple key event queue/ and process one event per key per frame in
+        // ImGui_ImplAndroid_NewFrame()...or consider using IO queue, if suitable: https://github.com/ocornut/imgui/issues/2787
+        case AKEY_EVENT_ACTION_DOWN:
+        case AKEY_EVENT_ACTION_UP:
+            g_KeyEventQueues[event_key_code].push(event_action);
+            break;
+        default:
+            break;
+        }
+        break;
+    }
+    case AINPUT_EVENT_TYPE_MOTION:
+    {
+        int32_t event_action = AMotionEvent_getAction(input_event);
+        int32_t event_pointer_index = (event_action & AMOTION_EVENT_ACTION_POINTER_INDEX_MASK) >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
+        event_action &= AMOTION_EVENT_ACTION_MASK;
+        switch (event_action)
+        {
+        case AMOTION_EVENT_ACTION_DOWN:
+        case AMOTION_EVENT_ACTION_UP:
+            // Physical mouse buttons (and probably other physical devices) also invoke the actions AMOTION_EVENT_ACTION_DOWN/_UP,
+            // but we have to process them separately to identify the actual button pressed. This is done below via
+            // AMOTION_EVENT_ACTION_BUTTON_PRESS/_RELEASE. Here, we only process "FINGER" input (and "UNKNOWN", as a fallback).
+            if((AMotionEvent_getToolType(input_event, event_pointer_index) == AMOTION_EVENT_TOOL_TYPE_FINGER)
+            || (AMotionEvent_getToolType(input_event, event_pointer_index) == AMOTION_EVENT_TOOL_TYPE_STYLUS) || (AMotionEvent_getToolType(input_event, event_pointer_index) == AMOTION_EVENT_TOOL_TYPE_UNKNOWN))
+            {
+                io.MouseDown[0] = (event_action == AMOTION_EVENT_ACTION_DOWN);
+                io.MousePos = ImVec2(AMotionEvent_getX(input_event, event_pointer_index), AMotionEvent_getY(input_event, event_pointer_index));
+            }
+            break;
+        case AMOTION_EVENT_ACTION_BUTTON_PRESS:
+        case AMOTION_EVENT_ACTION_BUTTON_RELEASE:
+            {
+                int32_t button_state = AMotionEvent_getButtonState(input_event);
+                io.MouseDown[0] = ((button_state & AMOTION_EVENT_BUTTON_PRIMARY) != 0);
+                io.MouseDown[1] = ((button_state & AMOTION_EVENT_BUTTON_SECONDARY) != 0);
+                io.MouseDown[2] = ((button_state & AMOTION_EVENT_BUTTON_TERTIARY) != 0);
+            }
+            break;
+        case AMOTION_EVENT_ACTION_HOVER_MOVE: // Hovering: Tool moves while NOT pressed (such as a physical mouse)
+        case AMOTION_EVENT_ACTION_MOVE:       // Touch pointer moves while DOWN
+            io.MousePos = ImVec2(AMotionEvent_getX(input_event, event_pointer_index), AMotionEvent_getY(input_event, event_pointer_index));
+            break;
+        case AMOTION_EVENT_ACTION_SCROLL:
+            io.MouseWheel = AMotionEvent_getAxisValue(input_event, AMOTION_EVENT_AXIS_VSCROLL, event_pointer_index);
+            io.MouseWheelH = AMotionEvent_getAxisValue(input_event, AMOTION_EVENT_AXIS_HSCROLL, event_pointer_index);
+            break;
+        default:
+            break;
+        }
+    }
+        return 1;
+    default:
+        break;
+    }
+
+    return 0;
+}
+
+bool ImGui_ImplAndroid_Init(ANativeWindow* window)
+{
+    g_Window = window;
+    g_Time = 0.0;
+
+    // Setup backend capabilities flags
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendPlatformName = "imgui_impl_android";
+
+    // Keyboard mapping. Dear ImGui will use those indices to peek into the io.KeysDown[] array.
+    io.KeyMap[ImGuiKey_Tab] = AKEYCODE_TAB;
+    io.KeyMap[ImGuiKey_LeftArrow] = AKEYCODE_DPAD_LEFT;   // also covers physical keyboard arrow key
+    io.KeyMap[ImGuiKey_RightArrow] = AKEYCODE_DPAD_RIGHT; // also covers physical keyboard arrow key
+    io.KeyMap[ImGuiKey_UpArrow] = AKEYCODE_DPAD_UP;       // also covers physical keyboard arrow key
+    io.KeyMap[ImGuiKey_DownArrow] = AKEYCODE_DPAD_DOWN;   // also covers physical keyboard arrow key
+    io.KeyMap[ImGuiKey_PageUp] = AKEYCODE_PAGE_UP;
+    io.KeyMap[ImGuiKey_PageDown] = AKEYCODE_PAGE_DOWN;
+    io.KeyMap[ImGuiKey_Home] = AKEYCODE_MOVE_HOME;
+    io.KeyMap[ImGuiKey_End] = AKEYCODE_MOVE_END;
+    io.KeyMap[ImGuiKey_Insert] = AKEYCODE_INSERT;
+    io.KeyMap[ImGuiKey_Delete] = AKEYCODE_FORWARD_DEL;
+    io.KeyMap[ImGuiKey_Backspace] = AKEYCODE_DEL;
+    io.KeyMap[ImGuiKey_Space] = AKEYCODE_SPACE;
+    io.KeyMap[ImGuiKey_Enter] = AKEYCODE_ENTER;
+    io.KeyMap[ImGuiKey_Escape] = AKEYCODE_ESCAPE;
+    io.KeyMap[ImGuiKey_KeyPadEnter] = AKEYCODE_NUMPAD_ENTER;
+    io.KeyMap[ImGuiKey_A] = AKEYCODE_A;
+    io.KeyMap[ImGuiKey_C] = AKEYCODE_C;
+    io.KeyMap[ImGuiKey_V] = AKEYCODE_V;
+    io.KeyMap[ImGuiKey_X] = AKEYCODE_X;
+    io.KeyMap[ImGuiKey_Y] = AKEYCODE_Y;
+    io.KeyMap[ImGuiKey_Z] = AKEYCODE_Z;
+
+    return true;
+}
+
+void ImGui_ImplAndroid_Shutdown()
+{
+}
+
+void ImGui_ImplAndroid_NewFrame()
+{
+    ImGuiIO& io = ImGui::GetIO();
+
+    // Process queued key events
+    // FIXME: This is a workaround for multiple key event actions occurring at once (see above) and can be removed once we use upcoming input queue.
+    for (auto& key_queue : g_KeyEventQueues)
+    {
+        if (key_queue.second.empty())
+            continue;
+        io.KeysDown[key_queue.first] = (key_queue.second.front() == AKEY_EVENT_ACTION_DOWN);
+        key_queue.second.pop();
+    }
+
+    // Setup display size (every frame to accommodate for window resizing)
+    int32_t window_width = ANativeWindow_getWidth(g_Window);
+    int32_t window_height = ANativeWindow_getHeight(g_Window);
+    int display_width = window_width;
+    int display_height = window_height;
+
+    io.DisplaySize = ImVec2((float)window_width, (float)window_height);
+    if (window_width > 0 && window_height > 0)
+        io.DisplayFramebufferScale = ImVec2((float)display_width / window_width, (float)display_height / window_height);
+
+    // Setup time step
+    struct timespec current_timespec;
+    clock_gettime(CLOCK_MONOTONIC, &current_timespec);
+    double current_time = (double)(current_timespec.tv_sec) + (current_timespec.tv_nsec / 1000000000.0);
+    io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f / 60.0f);
+    g_Time = current_time;
+}
--- a/core/backends/android/imgui/imgui_impl_android.h
+++ b/core/backends/android/imgui/imgui_impl_android.h
@ -0,0 +1,27 @@
+// dear imgui: Platform Binding for Android native app
+// This needs to be used along with the OpenGL 3 Renderer (imgui_impl_opengl3)
+
+// Implemented features:
+//  [X] Platform: Keyboard arrays indexed using AKEYCODE_* codes, e.g. ImGui::IsKeyPressed(AKEYCODE_SPACE).
+// Missing features:
+//  [ ] Platform: Clipboard support.
+//  [ ] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
+//  [ ] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. FIXME: Check if this is even possible with Android.
+// Important:
+//  - FIXME: On-screen keyboard currently needs to be enabled by the application (see examples/ and issue #3446)
+//  - FIXME: Unicode character inputs needs to be passed by Dear ImGui by the application (see examples/ and issue #3446)
+
+// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. 
+// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
+// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
+// Read online: https://github.com/ocornut/imgui/tree/master/docs
+
+#pragma once
+
+struct ANativeWindow;
+struct AInputEvent;
+
+IMGUI_IMPL_API bool     ImGui_ImplAndroid_Init(ANativeWindow* window);
+IMGUI_IMPL_API int32_t  ImGui_ImplAndroid_HandleInputEvent(AInputEvent* input_event);
+IMGUI_IMPL_API void     ImGui_ImplAndroid_Shutdown();
+IMGUI_IMPL_API void     ImGui_ImplAndroid_NewFrame();
--- a/core/backends/android/keybinds.h
+++ b/core/backends/android/keybinds.h
@ -0,0 +1,27 @@
+#pragma once
+
+// No keyboard controls
+#define KB_KEY_HOME         -1
+#define KB_KEY_MENU         -1
+#define KB_KEY_END          -1
+#define KB_KEY_ESC          -1
+#define KB_KEY_PG_UP        -1
+#define KB_KEY_PG_DOWN      -1
+
+#define KB_KEY_ENTER        -1
+#define KB_KEY_KP_ENTER     -1
+#define KB_KEY_DEL          -1
+#define KB_KEY_BACKSPACE    -1
+
+#define KB_KEY_LEFT         -1
+#define KB_KEY_RIGHT        -1
+#define KB_KEY_UP           -1
+#define KB_KEY_DOWN         -1
+
+#define KB_KEY_LCTRL        -1
+#define KB_KEY_RCTRL        -1
+#define KB_KEY_LSHIFT       -1
+#define KB_KEY_RSHIFT       -1
+
+#define KB_KEY_A            -1
+#define KB_KEY_R            -1
--- a/sink_modules/android_audio_sink/CMakeLists.txt
+++ b/sink_modules/android_audio_sink/CMakeLists.txt
@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.13)
+project(audio_sink)
+
+file(GLOB SRC "src/*.cpp")
+
+add_library(audio_sink SHARED ${SRC})
+target_link_libraries(audio_sink PRIVATE sdrpp_core)
+set_target_properties(audio_sink PROPERTIES PREFIX "")
+
+target_include_directories(audio_sink PRIVATE "src/")
+
+target_compile_options(audio_sink PRIVATE -O3 -std=c++17)
+target_link_libraries(audio_sink PRIVATE aaudio)
--- a/sink_modules/android_audio_sink/src/main.cpp
+++ b/sink_modules/android_audio_sink/src/main.cpp
@ -0,0 +1,195 @@
+#include <imgui.h>
+#include <module.h>
+#include <gui/gui.h>
+#include <signal_path/signal_path.h>
+#include <signal_path/sink.h>
+#include <dsp/audio.h>
+#include <dsp/processing.h>
+#include <spdlog/spdlog.h>
+#include <config.h>
+#include <options.h>
+#include <utils/optionlist.h>
+#include <aaudio/AAudio.h>
+
+#define CONCAT(a, b) ((std::string(a) + b).c_str())
+
+SDRPP_MOD_INFO{
+    /* Name:            */ "audio_sink",
+    /* Description:     */ "Android audio sink module for SDR++",
+    /* Author:          */ "Ryzerth",
+    /* Version:         */ 0, 1, 0,
+    /* Max instances    */ 1
+};
+
+ConfigManager config;
+
+class AudioSink : SinkManager::Sink {
+public:
+    AudioSink(SinkManager::Stream* stream, std::string streamName) {
+        _stream = stream;
+        _streamName = streamName;
+
+        packer.init(_stream->sinkOut, 512);
+
+        // TODO: Add choice? I don't think anyone cares on android...
+        sampleRate = 48000;
+        _stream->setSampleRate(sampleRate);
+    }
+
+    ~AudioSink() {
+    }
+
+    void start() {
+        if (running) {
+            return;
+        }
+        doStart();
+        running = true;
+    }
+
+    void stop() {
+        if (!running) {
+            return;
+        }
+        doStop();
+        running = false;
+    }
+
+    void menuHandler() {
+        // Draw menu here
+    }
+
+private:
+    void doStart() {
+        // Create stream builder
+        AAudioStreamBuilder *builder;
+        aaudio_result_t result = AAudio_createStreamBuilder(&builder);
+
+        // Set stream options
+        bufferSize = round(sampleRate / 60.0);
+        AAudioStreamBuilder_setDirection(builder, AAUDIO_DIRECTION_OUTPUT);
+        AAudioStreamBuilder_setSharingMode(builder, AAUDIO_SHARING_MODE_SHARED);
+        AAudioStreamBuilder_setSampleRate(builder, sampleRate);
+        AAudioStreamBuilder_setChannelCount(builder, 2);
+        AAudioStreamBuilder_setFormat(builder, AAUDIO_FORMAT_PCM_FLOAT);
+        AAudioStreamBuilder_setBufferCapacityInFrames(builder, bufferSize);
+        AAudioStreamBuilder_setErrorCallback(builder, errorCallback, this);
+        packer.setSampleCount(bufferSize);
+        
+        // Open the stream
+        AAudioStreamBuilder_openStream(builder, &stream);
+
+        // Stream stream and packer
+        packer.start();
+        AAudioStream_requestStart(stream);
+
+        // We no longer need the builder
+        AAudioStreamBuilder_delete(builder);
+
+        // Start worker thread
+        workerThread = std::thread(&AudioSink::worker, this);
+    }
+
+    void doStop() {
+        packer.stop();
+        packer.out.stopReader();
+        AAudioStream_requestStop(stream);
+        AAudioStream_close(stream);
+        if (workerThread.joinable()) { workerThread.join(); }
+        packer.out.clearReadStop();
+    }
+
+    void worker() {
+        while (true) {
+            int count = packer.out.read();
+            if (count < 0) { return; }
+            AAudioStream_write(stream, packer.out.readBuf, count, 100000000);
+            packer.out.flush();
+        }
+    }
+
+    static void errorCallback(AAudioStream *stream, void *userData, aaudio_result_t error){
+        // detect an audio device detached and restart the stream
+        if (error == AAUDIO_ERROR_DISCONNECTED){
+            std::thread thr(&AudioSink::restart, (AudioSink*)userData);
+            thr.detach();
+        }
+    }
+
+    void restart() {
+        if (running) { doStop(); }
+        if (running) { doStart(); }
+    }
+
+    std::thread workerThread;
+
+    AAudioStream *stream = NULL;
+    SinkManager::Stream* _stream;
+    dsp::Packer<dsp::stereo_t> packer;
+
+    std::string _streamName;
+    double sampleRate;
+    int bufferSize;
+
+    bool running = false;
+};
+
+class AudioSinkModule : public ModuleManager::Instance {
+public:
+    AudioSinkModule(std::string name) {
+        this->name = name;
+        provider.create = create_sink;
+        provider.ctx = this;
+
+        sigpath::sinkManager.registerSinkProvider("Audio", provider);
+    }
+
+    ~AudioSinkModule() {
+        // Unregister sink, this will automatically stop and delete all instances of the audio sink
+        sigpath::sinkManager.unregisterSinkProvider("Audio");
+    }
+
+    void postInit() {}
+
+    void enable() {
+        enabled = true;
+    }
+
+    void disable() {
+        enabled = false;
+    }
+
+    bool isEnabled() {
+        return enabled;
+    }
+
+private:
+    static SinkManager::Sink* create_sink(SinkManager::Stream* stream, std::string streamName, void* ctx) {
+        return (SinkManager::Sink*)(new AudioSink(stream, streamName));
+    }
+
+    std::string name;
+    bool enabled = true;
+    SinkManager::SinkProvider provider;
+};
+
+MOD_EXPORT void _INIT_() {
+    json def = json({});
+    config.setPath(options::opts.root + "/audio_sink_config.json");
+    config.load(def);
+    config.enableAutoSave();
+}
+
+MOD_EXPORT void* _CREATE_INSTANCE_(std::string name) {
+    AudioSinkModule* instance = new AudioSinkModule(name);
+    return instance;
+}
+
+MOD_EXPORT void _DELETE_INSTANCE_(void* instance) {
+    delete (AudioSinkModule*)instance;
+}
+
+MOD_EXPORT void _END_() {
+    config.disableAutoSave();
+    config.save();
+}