android flutter plugin

veilid-flutter/android/.gitignore

@@ -6,3 +6,4 @@
 .DS_Store
 /build
 /captures
+.cxx

veilid-flutter/android/CMakeLists.txt

@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 3.1)
+project(cpplink CXX)
+add_library(cpplink cpplink.cpp)

veilid-flutter/android/build.gradle

@@ -1,6 +1,3 @@
-group 'com.veilid.veilid'
-version '1.0-SNAPSHOT'
-
 buildscript {
     ext.kotlin_version = '1.3.50'
     repositories {
@@ -14,6 +11,13 @@ buildscript {
     }
 }
 
+plugins {
+    id "org.mozilla.rust-android-gradle.rust-android" version "0.9.0"
+}
+
+group 'com.veilid.veilid'
+version '1.0-SNAPSHOT'
+
 rootProject.allprojects {
     repositories {
         google()
@@ -41,10 +45,60 @@ android {
     }
 
     defaultConfig {
-        minSdkVersion 16
+        minSdkVersion 24
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+        
+        ndk {
+            abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
+        }
+
+        // Required to copy libc++_shared.so
+        externalNativeBuild {
+            cmake {
+                arguments "-DANDROID_STL=c++_shared"
+                targets "cpplink"
+            }
+        }
+    }
+
+    ndkVersion '22.0.7026061'
+ 
+    // Required to copy libc++_shared.so
+    externalNativeBuild {
+        cmake {
+            path file('CMakeLists.txt')
+        }
     }
 }
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 }
+
+apply plugin: 'org.mozilla.rust-android-gradle.rust-android'
+
+cargo {
+    module  = "../rust"
+    libname = "veilid_flutter"
+    targets = ["arm", "arm64", "x86", "x86_64"]
+    targetDirectory = "../../target"
+    prebuiltToolchains = true
+    profile = gradle.startParameter.taskNames.any{it.toLowerCase().contains("debug")} ? "debug" : "release"
+    // features {
+    //     defaultAnd("android_tests")
+    // }
+}
+
+afterEvaluate {
+    // The `cargoBuild` task isn't available until after evaluation.
+    android.libraryVariants.all { variant ->
+        def productFlavor = ""
+        variant.productFlavors.each {
+            productFlavor += "${it.name.capitalize()}"
+        }
+        def buildType = "${variant.buildType.name.capitalize()}"
+        tasks["generate${productFlavor}${buildType}Assets"].dependsOn(tasks["cargoBuild"])
+    }
+}

veilid-flutter/android/src/main/kotlin/com/veilid/veilid/VeilidPlugin.kt

@@ -14,22 +14,22 @@ class VeilidPlugin: FlutterPlugin, MethodCallHandler {
   ///
   /// This local reference serves to register the plugin with the Flutter Engine and unregister it
   /// when the Flutter Engine is detached from the Activity
-  private lateinit var channel : MethodChannel
+  // private lateinit var channel : MethodChannel
 
   override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
-    channel = MethodChannel(flutterPluginBinding.binaryMessenger, "veilid")
-    channel.setMethodCallHandler(this)
+  //   channel = MethodChannel(flutterPluginBinding.binaryMessenger, "veilid")
+  //   channel.setMethodCallHandler(this)
   }
 
   override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
-    if (call.method == "getPlatformVersion") {
-      result.success("Android ${android.os.Build.VERSION.RELEASE}")
-    } else {
-      result.notImplemented()
-    }
+  //   if (call.method == "getPlatformVersion") {
+  //     result.success("Android ${android.os.Build.VERSION.RELEASE}")
+  //   } else {
+    result.notImplemented()
+  //   }
   }
 
   override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
-    channel.setMethodCallHandler(null)
+  //   channel.setMethodCallHandler(null)
   }
 }