[WIP] Add SOCKS5 proxy server implementation in Android app

.github/workflows/android-build.yml

@@ -0,0 +1,33 @@
+name: Android Build
+
+on:
+  push:
+    branches: [ main, "copilot/**" ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: gradle
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Build Debug APK
+        run: ./gradlew assembleDebug --stacktrace
+
+      - name: Upload APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: debug-apk
+          path: app/build/outputs/apk/debug/*.apk

.gitignore

@@ -0,0 +1,11 @@
+*.iml
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/build
+app/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/build.gradle.kts

@@ -0,0 +1,61 @@
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.compose)
+}
+
+android {
+    namespace = "com.veynko.proxyserver"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "com.veynko.proxyserver"
+        minSdk = 26
+        targetSdk = 35
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+    buildFeatures {
+        compose = true
+    }
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.lifecycle.viewmodel.ktx)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
+    implementation(libs.kotlinx.coroutines.android)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+}

app/proguard-rules.pro

@@ -0,0 +1,2 @@
+# Add project specific ProGuard rules here.
+-keep class com.veynko.proxyserver.** { *; }

app/src/main/AndroidManifest.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_notification"
+        android:label="@string/app_name"
+        android:roundIcon="@drawable/ic_notification"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.ProxyServer">
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.ProxyServer">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name=".service.ProxyForegroundService"
+            android:enabled="true"
+            android:exported="false"
+            android:foregroundServiceType="dataSync" />
+
+    </application>
+
+</manifest>

app/src/main/kotlin/com/veynko/proxyserver/MainActivity.kt

@@ -0,0 +1,29 @@
+package com.veynko.proxyserver
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Scaffold
+import androidx.compose.ui.Modifier
+import com.veynko.proxyserver.ui.ProxyScreen
+import com.veynko.proxyserver.ui.theme.ProxyServerTheme
+
+/**
+ * Entry point activity for the SOCKS5 Proxy Server app.
+ */
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            ProxyServerTheme {
+                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                    ProxyScreen(modifier = Modifier.padding(innerPadding))
+                }
+            }
+        }
+    }
+}