feat(android): initialize Android project with Gradle configuration, build scripts, and main application structure for MeshChatX

android/app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'com.chaquo.python'
+}
+
+android {
+    namespace 'com.meshchatx'
+    compileSdk 34
+
+    defaultConfig {
+        applicationId "com.meshchatx"
+        minSdk 24
+        targetSdk 34
+        versionCode 1
+        versionName "3.1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    packagingOptions {
+        jniLibs {
+            useLegacyPackaging = true
+        }
+    }
+}
+
+chaquopy {
+    defaultConfig {
+        version = "3.11"
+        buildPython "python3.11"
+        
+        pip {
+            install "aiohttp>=3.13.2"
+            install "lxmf>=0.9.3"
+            install "psutil>=7.1.3"
+            install "rns>=1.0.4"
+            install "websockets>=15.0.1"
+            install "bcrypt>=5.0.0,<6.0.0"
+            install "aiohttp-session>=2.12.1,<3.0.0"
+            install "cryptography>=46.0.3,<47.0.0"
+            install "requests>=2.32.5,<3.0.0"
+            install "lxst>=0.4.5,<0.5.0"
+            install "ply>=3.11,<4.0"
+        }
+    }
+    
+    sourceSets {
+        main {
+            python {
+                srcDirs = ["src/main/python"]
+            }
+        }
+    }
+}
+
+dependencies {
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'com.google.android.material:material:1.10.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.webkit:webkit:1.8.0'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.6.2'
+    
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+}
+

android/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+
+    <application
+        android:name="com.chaquo.python.android.PyApplication"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.MeshChatX"
+        android:usesCleartextTraffic="true"
+        tools:targetApi="31">
+        
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTask"
+            android:configChanges="orientation|screenSize|keyboardHidden">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name=".MeshChatService"
+            android:enabled="true"
+            android:exported="false"
+            android:foregroundServiceType="dataSync" />
+    </application>
+
+</manifest>
+

android/app/src/main/java/com/meshchatx/MainActivity.java

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+package com.meshchatx;
+
+import android.annotation.SuppressLint;
+import android.os.Bundle;
+import android.webkit.WebSettings;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+import android.widget.ProgressBar;
+import androidx.appcompat.app.AppCompatActivity;
+import com.chaquo.python.Python;
+import com.chaquo.python.android.AndroidPlatform;
+
+public class MainActivity extends AppCompatActivity {
+    private WebView webView;
+    private ProgressBar progressBar;
+    private static final String SERVER_URL = "http://127.0.0.1:8000";
+    private static final int SERVER_PORT = 8000;
+
+    @SuppressLint("SetJavaScriptEnabled")
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        webView = findViewById(R.id.webView);
+        progressBar = findViewById(R.id.progressBar);
+
+        if (!Python.isStarted()) {
+            Python.start(new AndroidPlatform(this));
+        }
+
+        WebSettings webSettings = webView.getSettings();
+        webSettings.setJavaScriptEnabled(true);
+        webSettings.setDomStorageEnabled(true);
+        webSettings.setDatabaseEnabled(true);
+        webSettings.setAllowFileAccess(true);
+        webSettings.setAllowContentAccess(true);
+        webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
+
+        webView.setWebViewClient(new WebViewClient() {
+            @Override
+            public void onPageFinished(WebView view, String url) {
+                super.onPageFinished(view, url);
+                progressBar.setVisibility(android.view.View.GONE);
+            }
+
+            @Override
+            public void onPageStarted(WebView view, String url, android.graphics.Bitmap favicon) {
+                super.onPageStarted(view, url, favicon);
+                progressBar.setVisibility(android.view.View.VISIBLE);
+            }
+        });
+
+        startMeshChatServer();
+        
+        new Thread(() -> {
+            try {
+                Thread.sleep(2000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            runOnUiThread(() -> {
+                webView.loadUrl(SERVER_URL);
+            });
+        }).start();
+    }
+
+    private void startMeshChatServer() {
+        new Thread(() -> {
+            try {
+                Python py = Python.getInstance();
+                py.getModule("meshchat_wrapper").callAttr("start_server", SERVER_PORT);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }).start();
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (webView.canGoBack()) {
+            webView.goBack();
+        } else {
+            super.onBackPressed();
+        }
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        if (webView != null) {
+            webView.destroy();
+        }
+    }
+}
+

android/app/src/main/python/meshchat_wrapper.py

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+import sys
+
+def start_server(port=8000):
+    try:
+        from meshchatx.meshchat import main
+        
+        sys.argv = [
+            'meshchat',
+            '--headless',
+            '--host', '127.0.0.1',
+            '--port', str(port),
+            '--no-https'
+        ]
+        
+        main()
+    except Exception as e:
+        print(f"Error starting MeshChatX server: {e}")
+        import traceback
+        traceback.print_exc()
+        raise
+

android/app/src/main/res/layout/activity_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <WebView
+        android:id="@+id/webView"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
+

android/app/src/main/res/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
+

android/app/src/main/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">MeshChatX</string>
+</resources>
+

android/app/src/main/res/values/themes.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.MeshChatX" parent="Theme.MaterialComponents.DayNight.NoActionBar">
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
+    </style>
+</resources>
+