Create JNI interface for Android app

2 files changed, 33 insertions, 0 deletions

diff --git a/android/build.gradle b/android/build.gradle
index 5be82b79d7..8daad909e0 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -4,6 +4,9 @@ import org.jmailen.gradle.kotlinter.tasks.LintTask
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 
+def repoRootPath = projectDir.absoluteFile.parentFile.absolutePath
+def extraJniDirectory = "$project.buildDir/extraJni"
+
 android {
     compileSdkVersion 28
     buildToolsVersion '28.0.3'
@@ -22,6 +25,20 @@ android {
             proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
         }
     }
+
+    sourceSets {
+        main {
+            jniLibs {
+                srcDirs = files(extraJniDirectory)
+            }
+        }
+    }
+
+    applicationVariants.all { variant ->
+        variant.ndkCompileProvider.configure {
+            dependsOn copyMullvadJni
+        }
+    }
 }
 
 repositories {
@@ -65,3 +82,9 @@ task format(type: FormatTask, group: 'formatting') {
 }
 
 lint.dependsOn lintKotlin
+
+task copyMullvadJni(type: Copy) {
+    from "$repoRootPath/target/aarch64-linux-android/debug"
+    include 'libmullvad_jni.so'
+    into "$extraJniDirectory/arm64-v8a"
+}
diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/MullvadDaemon.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/MullvadDaemon.kt
new file mode 100644
index 0000000000..d5ab845f89
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/MullvadDaemon.kt
@@ -0,0 +1,10 @@
+package net.mullvad.mullvadvpn
+
+class MullvadDaemon {
+    init {
+        System.loadLibrary("mullvad_jni")
+        initialize()
+    }
+
+    private external fun initialize()
+}