Android native calling — Increment 1: full-screen incoming ring + answer

First slice of Android Phase C (full LiveKit parity), mirroring how iOS
started: native full-screen incoming call UI that wakes the app from
closed, with call MEDIA still in the WebView (foreground). Native LiveKit
media + a foreground service for true background audio are Increment 2.

Native (new Android side of the native-call plugin, Java to match the
proven official-plugin module layout):
- NativeCallPlugin: registered as window.Capacitor.Plugins.NativeCall
  (same jsName as iOS, so the shared web bridge drives both). getToken
  (FCM token), reportIncomingCall (ring), reportOutgoingCall, endCall,
  setMuted; video/screen/hole-punch/transcript methods are safe no-ops
  until later increments so the shared bridge never rejects.
- BzCallMessagingService: extends @capacitor/push-notifications'
  MessagingService — handles high-priority call-wake DATA messages
  (data.bzcall==1) to ring when closed, forwards all other push via super.
- IncomingCallActivity: full-screen call screen over the lock screen
  (showWhenLocked/turnScreenOn), Accept/Decline, looping ringtone.
- CallStore: incoming-call notification (channel, full-screen-intent,
  actions) + UUID dedup so the FCM and WebSocket paths don't double-ring.
- Plugin manifest: BzCallMessagingService + IncomingCallActivity + call
  perms (USE_FULL_SCREEN_INTENT/VIBRATE/WAKE_LOCK).
- android-patch.js: removes Capacitor's MessagingService in the APP
  manifest (highest merge priority) so ours is the sole MESSAGING_EVENT
  receiver; ensures the tools namespace. Idempotent.
- package.json: capacitor.android.src wired.

Server (dormant until ANDROID_CALLS=1):
- push.js sendFcmData: high-priority data-only FCM (rings when closed).
  sendCallNotification rings 'android' tokens via it; sendCallCancel too.
- config.js ANDROID_CALLS flag; /api/meetings/config exposes androidCall.

Web (home.html) — platform-aware, iOS/web behavior byte-for-byte unchanged:
- setupNativeCall: Android gated on cfg.androidCall, sets _callWebViewMedia
  (native ring, WebView media); iOS keeps CallKit native-media path.
- answerCall + both outgoing sites branch on _callWebViewMedia so Android
  joins the meeting normally while the callee still rings via the server.

Safe to deploy now: dormant until ANDROID_CALLS=1 AND an APK carrying the
plugin is installed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

mobile/plugins/native-call/android/build.gradle

@@ -0,0 +1,65 @@
+// Android build for the native-call plugin. Mirrors the official @capacitor/* plugin module layout (see
+// node_modules/@capacitor/status-bar/android/build.gradle) so it drops into the CI-generated app exactly like
+// the plugins that already build. Java (not Kotlin) to match the proven official-plugin structure — no extra
+// kotlin-gradle-plugin wiring in the library module, one less thing to fail when authored blind.
+ext {
+    junitVersion = project.hasProperty('junitVersion') ? rootProject.ext.junitVersion : '4.13.2'
+    androidxCoreVersion = project.hasProperty('androidxCoreVersion') ? rootProject.ext.androidxCoreVersion : '1.12.0'
+    androidxAppCompatVersion = project.hasProperty('androidxAppCompatVersion') ? rootProject.ext.androidxAppCompatVersion : '1.6.1'
+    // Same FCM version the @capacitor/push-notifications plugin pulls in, so we don't fork the Firebase version.
+    firebaseMessagingVersion = project.hasProperty('firebaseMessagingVersion') ? rootProject.ext.firebaseMessagingVersion : '23.3.1'
+}
+
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.2.1'
+    }
+}
+
+apply plugin: 'com.android.library'
+
+android {
+    namespace "com.bizgaze.connect.nativecall"
+    compileSdk project.hasProperty('compileSdkVersion') ? rootProject.ext.compileSdkVersion : 34
+    defaultConfig {
+        minSdkVersion project.hasProperty('minSdkVersion') ? rootProject.ext.minSdkVersion : 23
+        targetSdkVersion project.hasProperty('targetSdkVersion') ? rootProject.ext.targetSdkVersion : 34
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    lintOptions {
+        abortOnError false
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+}
+
+repositories {
+    google()
+    mavenCentral()
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation project(':capacitor-android')
+    // The Biz Connect call-wake FirebaseMessagingService extends the @capacitor/push-notifications one so a
+    // single service handles BOTH regular push (forwarded via super) and call-wake data messages.
+    implementation project(':capacitor-push-notifications')
+    implementation "androidx.core:core:$androidxCoreVersion"
+    implementation "androidx.appcompat:appcompat:$androidxAppCompatVersion"
+    // RemoteMessage / FirebaseMessaging (transitive from the push plugin, but declared so this module compiles
+    // against it directly; same version → no resolution conflict).
+    implementation "com.google.firebase:firebase-messaging:$firebaseMessagingVersion"
+}

mobile/plugins/native-call/android/src/main/AndroidManifest.xml

@@ -0,0 +1,36 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <!-- Full-screen incoming-call UI over the lock screen (Android's answer to CallKit). VIBRATE + WAKE_LOCK
+         for the ring; POST_NOTIFICATIONS is also added app-side by android-patch.js. -->
+    <uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+
+    <application>
+        <!-- Our FirebaseMessagingService REPLACES the @capacitor/push-notifications one: it handles call-wake
+             DATA messages natively (to ring when the app is closed) and forwards everything else to Capacitor's
+             push handling via super.onMessageReceived(). Capacitor's service is removed in the APP manifest
+             (android-patch.js, highest merge priority) so there is exactly one MESSAGING_EVENT receiver; the high
+             intent-filter priority here is belt-and-braces so ours wins even if that removal ever no-ops. -->
+        <service
+            android:name="com.bizgaze.connect.nativecall.BzCallMessagingService"
+            android:exported="false">
+            <intent-filter android:priority="999">
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
+
+        <!-- The full-screen incoming-call screen. showWhenLocked + turnScreenOn make it appear over the lock
+             screen and wake the display; excludeFromRecents keeps it out of the recents list. -->
+        <activity
+            android:name="com.bizgaze.connect.nativecall.IncomingCallActivity"
+            android:exported="false"
+            android:launchMode="singleTop"
+            android:excludeFromRecents="true"
+            android:showOnLockScreen="true"
+            android:showWhenLocked="true"
+            android:turnScreenOn="true"
+            android:theme="@android:style/Theme.DeviceDefault.NoActionBar" />
+    </application>
+</manifest>

mobile/plugins/native-call/android/src/main/java/com/bizgaze/connect/nativecall/BzCallMessagingService.java

@@ -0,0 +1,57 @@
+package com.bizgaze.connect.nativecall;
+
+import androidx.annotation.NonNull;
+
+import com.google.firebase.messaging.RemoteMessage;
+
+import java.util.HashMap;
+import java.util.Map;
+
+// The single FirebaseMessagingService for the app. It REPLACES @capacitor/push-notifications' MessagingService
+// (removed in AndroidManifest via tools:node="remove") so there is exactly one MESSAGING_EVENT receiver:
+//   * call-wake DATA messages (data.bzcall == "1") → ring natively, even when the app is closed. A high-priority
+//     data-only FCM message is delivered to onMessageReceived in any app state (a "notification" message would
+//     just sit in the tray and never run our code).
+//   * everything else → super.onMessageReceived(), i.e. Capacitor's normal push handling (chat/meeting banners).
+// onNewToken is likewise forwarded so the web still registers this device's "android" FCM token — the same token
+// the server targets for call-wakes.
+public class BzCallMessagingService extends com.capacitorjs.plugins.pushnotifications.MessagingService {
+
+    @Override
+    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
+        Map<String, String> data = remoteMessage.getData();
+        if (data != null && "1".equals(data.get("bzcall"))) {
+            String type = data.get("type");
+            String uuid = data.get("callUUID");
+            if ("cancel".equals(type)) {
+                CallStore.markEnded(uuid);
+                CallStore.cancel(getApplicationContext());
+                IncomingCallActivity.dismissIfShowing();
+                return;
+            }
+            Map<String, String> call = new HashMap<>();
+            call.put("callUUID", uuid == null ? "" : uuid);
+            call.put("room", or(data.get("room")));
+            call.put("kind", data.get("kind") == null ? "dm" : data.get("kind"));
+            call.put("callerId", or(data.get("callerId")));
+            call.put("callerName", data.get("callerName") != null ? data.get("callerName")
+                    : (data.get("groupName") != null ? data.get("groupName") : "Incoming call"));
+            call.put("groupId", or(data.get("groupId")));
+            call.put("groupName", or(data.get("groupName")));
+            // Server sends hasVideo as "1"/""; normalize to "true"/"false" so the UI's checks are consistent
+            // with the WebSocket path (reportIncomingCall stores Boolean.toString()).
+            String hv = data.get("hasVideo");
+            call.put("hasVideo", ("1".equals(hv) || "true".equals(hv)) ? "true" : "false");
+            CallStore.showIncoming(getApplicationContext(), call);
+            return;
+        }
+        super.onMessageReceived(remoteMessage);
+    }
+
+    @Override
+    public void onNewToken(@NonNull String s) {
+        super.onNewToken(s);
+    }
+
+    private static String or(String v) { return v == null ? "" : v; }
+}

mobile/plugins/native-call/android/src/main/java/com/bizgaze/connect/nativecall/CallStore.java

@@ -0,0 +1,109 @@
+package com.bizgaze.connect.nativecall;
+
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.media.AudioAttributes;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Build;
+
+import androidx.core.app.NotificationCompat;
+import androidx.core.app.NotificationManagerCompat;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+// Builds and shows the full-screen incoming-call notification (Android's stand-in for CallKit's system ring),
+// and dedupes calls so the FCM push path and the WebSocket path don't ring the same call twice. One call at a
+// time is assumed (a single NOTIF_ID), matching the app's 1:1 / single-group-call model.
+class CallStore {
+
+    static final String CHANNEL_ID = "bzc_incoming_calls";
+    static final int NOTIF_ID = 2748;
+
+    static final String ACTION_RING = "com.bizgaze.connect.nativecall.RING";
+    static final String ACTION_ACCEPT = "com.bizgaze.connect.nativecall.ACCEPT";
+    static final String ACTION_DECLINE = "com.bizgaze.connect.nativecall.DECLINE";
+
+    // callUUIDs currently ringing/active and ones we've already ended — so a late/duplicate wake doesn't re-ring.
+    private static final java.util.Set<String> active = ConcurrentHashMap.newKeySet();
+    private static final java.util.Set<String> ended = ConcurrentHashMap.newKeySet();
+
+    static boolean isKnown(String uuid) { return uuid != null && (active.contains(uuid) || ended.contains(uuid)); }
+    static void markActive(String uuid) { if (uuid != null) active.add(uuid); }
+    static void markEnded(String uuid) { if (uuid != null) { active.remove(uuid); ended.add(uuid); } }
+
+    private static void ensureChannel(Context ctx) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return;
+        NotificationManager nm = (NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);
+        if (nm == null || nm.getNotificationChannel(CHANNEL_ID) != null) return;
+        NotificationChannel ch = new NotificationChannel(CHANNEL_ID, "Incoming calls", NotificationManager.IMPORTANCE_HIGH);
+        ch.setDescription("Ringing for incoming Biz Connect calls");
+        Uri ring = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
+        AudioAttributes attrs = new AudioAttributes.Builder()
+                .setUsage(AudioAttributes.USAGE_NOTIFICATION_RINGTONE)
+                .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
+                .build();
+        if (ring != null) ch.setSound(ring, attrs);
+        ch.enableVibration(true);
+        ch.setVibrationPattern(new long[]{0, 700, 700, 700, 700});
+        ch.setLockscreenVisibility(NotificationCompat.VISIBILITY_PUBLIC);
+        nm.createNotificationChannel(ch);
+    }
+
+    private static Intent activityIntent(Context ctx, String action, Map<String, String> call) {
+        Intent i = new Intent(ctx, IncomingCallActivity.class);
+        i.setAction(action);
+        i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        for (Map.Entry<String, String> e : call.entrySet()) i.putExtra(e.getKey(), e.getValue());
+        return i;
+    }
+
+    private static PendingIntent activityPI(Context ctx, String action, int req, Map<String, String> call) {
+        int flags = PendingIntent.FLAG_UPDATE_CURRENT;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) flags |= PendingIntent.FLAG_IMMUTABLE;
+        return PendingIntent.getActivity(ctx, req, activityIntent(ctx, action, call), flags);
+    }
+
+    // Show the ringing notification with a full-screen intent (launches IncomingCallActivity over the lock
+    // screen when allowed; otherwise shows as a heads-up with Accept/Decline buttons).
+    static void showIncoming(Context ctx, Map<String, String> call) {
+        String uuid = call.get("callUUID");
+        if (uuid == null || ended.contains(uuid)) return;
+        active.add(uuid);
+        ensureChannel(ctx);
+
+        String title = call.get("callerName");
+        if (title == null || title.isEmpty()) title = "Incoming call";
+        boolean video = "true".equals(call.get("hasVideo"));
+
+        PendingIntent full = activityPI(ctx, ACTION_RING, 1, call);
+        PendingIntent accept = activityPI(ctx, ACTION_ACCEPT, 2, call);
+        PendingIntent decline = activityPI(ctx, ACTION_DECLINE, 3, call);
+
+        NotificationCompat.Builder b = new NotificationCompat.Builder(ctx, CHANNEL_ID)
+                .setSmallIcon(android.R.drawable.sym_call_incoming)
+                .setContentTitle(title)
+                .setContentText(video ? "Incoming video call" : "Incoming call")
+                .setCategory(NotificationCompat.CATEGORY_CALL)
+                .setPriority(NotificationCompat.PRIORITY_HIGH)
+                .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
+                .setOngoing(true)
+                .setAutoCancel(false)
+                .setContentIntent(full)
+                .setFullScreenIntent(full, true)
+                .addAction(0, "Decline", decline)
+                .addAction(0, "Accept", accept);
+
+        try {
+            NotificationManagerCompat.from(ctx).notify(NOTIF_ID, b.build());
+        } catch (SecurityException ignored) { /* POST_NOTIFICATIONS not granted */ }
+    }
+
+    static void cancel(Context ctx) {
+        try { NotificationManagerCompat.from(ctx).cancel(NOTIF_ID); } catch (Exception ignored) {}
+    }
+}

mobile/plugins/native-call/android/src/main/java/com/bizgaze/connect/nativecall/IncomingCallActivity.java

@@ -0,0 +1,205 @@
+package com.bizgaze.connect.nativecall;
+
+import android.app.Activity;
+import android.app.KeyguardManager;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Color;
+import android.media.Ringtone;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.Gravity;
+import android.view.View;
+import android.view.WindowManager;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.getcapacitor.JSObject;
+
+// The full-screen incoming-call UI (Android's stand-in for the CallKit ring screen). Launched over the lock
+// screen by CallStore's full-screen-intent notification. Shows the caller + Accept/Decline; wires the choice
+// back to the WebView via NativeCallPlugin. Media still runs in the WebView (Increment 1) — Accept just brings
+// the app to the front and fires "answerCall", which the web joins as a normal meeting.
+public class IncomingCallActivity extends Activity {
+
+    private static IncomingCallActivity current;
+
+    private Ringtone ringtone;
+    private JSObject callData;
+    private boolean handled = false;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        showOverLockScreen();
+        handleIntent(getIntent());
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        setIntent(intent);
+        handleIntent(intent);
+    }
+
+    private void handleIntent(Intent intent) {
+        String action = intent != null ? intent.getAction() : null;
+        callData = extras(intent);
+        if (CallStore.ACTION_ACCEPT.equals(action)) { doAccept(); return; }
+        if (CallStore.ACTION_DECLINE.equals(action)) { doDecline(); return; }
+        // RING (default): show the UI + ring.
+        current = this;
+        setContentView(buildUi());
+        startRinging();
+    }
+
+    private JSObject extras(Intent intent) {
+        JSObject o = new JSObject();
+        String[] keys = {"callUUID", "room", "kind", "callerId", "callerName", "groupId", "groupName", "hasVideo"};
+        if (intent != null) for (String k : keys) { String v = intent.getStringExtra(k); if (v != null) o.put(k, v); }
+        return o;
+    }
+
+    private void showOverLockScreen() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            setShowWhenLocked(true);
+            setTurnScreenOn(true);
+            KeyguardManager km = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
+            if (km != null) km.requestDismissKeyguard(this, null);
+        } else {
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
+                    | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+        }
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+    }
+
+    private View buildUi() {
+        LinearLayout root = new LinearLayout(this);
+        root.setOrientation(LinearLayout.VERTICAL);
+        root.setGravity(Gravity.CENTER);
+        root.setBackgroundColor(Color.parseColor("#16294F")); // brand blue
+        int pad = dp(24);
+        root.setPadding(pad, pad, pad, pad);
+
+        boolean video = "true".equals(callData.getString("hasVideo", "false"));
+        String name = callData.getString("callerName", "Incoming call");
+        if (name == null || name.isEmpty()) name = "Incoming call";
+
+        TextView label = new TextView(this);
+        label.setText(video ? "Incoming video call" : "Incoming call");
+        label.setTextColor(Color.parseColor("#BBD0FF"));
+        label.setTextSize(16);
+        label.setGravity(Gravity.CENTER);
+
+        TextView who = new TextView(this);
+        who.setText(name);
+        who.setTextColor(Color.WHITE);
+        who.setTextSize(30);
+        who.setGravity(Gravity.CENTER);
+        LinearLayout.LayoutParams whoLp = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
+        whoLp.topMargin = dp(12);
+        whoLp.bottomMargin = dp(48);
+
+        LinearLayout buttons = new LinearLayout(this);
+        buttons.setOrientation(LinearLayout.HORIZONTAL);
+        buttons.setGravity(Gravity.CENTER);
+
+        Button decline = actionButton("Decline", "#DC2626");
+        decline.setOnClickListener(v -> doDecline());
+        Button accept = actionButton("Accept", "#16A34A");
+        accept.setOnClickListener(v -> doAccept());
+
+        LinearLayout.LayoutParams bl = new LinearLayout.LayoutParams(dp(120), dp(56));
+        bl.rightMargin = dp(20);
+        LinearLayout.LayoutParams br = new LinearLayout.LayoutParams(dp(120), dp(56));
+        buttons.addView(decline, bl);
+        buttons.addView(accept, br);
+
+        root.addView(label);
+        root.addView(who, whoLp);
+        root.addView(buttons);
+        return root;
+    }
+
+    private Button actionButton(String text, String colorHex) {
+        Button b = new Button(this);
+        b.setText(text);
+        b.setTextColor(Color.WHITE);
+        b.setAllCaps(false);
+        b.setBackgroundColor(Color.parseColor(colorHex));
+        return b;
+    }
+
+    private void startRinging() {
+        try {
+            Uri uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
+            if (uri == null) return;
+            ringtone = RingtoneManager.getRingtone(getApplicationContext(), uri);
+            if (ringtone != null) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) ringtone.setLooping(true);
+                ringtone.play();
+            }
+        } catch (Exception ignored) {}
+    }
+
+    private void stopRinging() {
+        try { if (ringtone != null && ringtone.isPlaying()) ringtone.stop(); } catch (Exception ignored) {}
+        ringtone = null;
+    }
+
+    private void doAccept() {
+        if (handled) { finish(); return; }
+        handled = true;
+        stopRinging();
+        String uuid = callData.getString("callUUID", "");
+        CallStore.markActive(uuid);
+        CallStore.cancel(getApplicationContext());
+        // Bring the app to the front so the WebView loads and joins the meeting, then fire the answer (retained
+        // in the plugin until the WebView JS attaches — covers a cold/locked pickup).
+        Intent launch = getPackageManager().getLaunchIntentForPackage(getPackageName());
+        if (launch != null) {
+            launch.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
+            startActivity(launch);
+        }
+        NativeCallPlugin.deliverAnswer(callData);
+        finishAndClear();
+    }
+
+    private void doDecline() {
+        if (handled) { finish(); return; }
+        handled = true;
+        stopRinging();
+        CallStore.markEnded(callData.getString("callUUID", ""));
+        CallStore.cancel(getApplicationContext());
+        NativeCallPlugin.deliverEnd(callData);
+        finishAndClear();
+    }
+
+    private void finishAndClear() {
+        if (current == this) current = null;
+        finish();
+    }
+
+    @Override
+    protected void onDestroy() {
+        stopRinging();
+        if (current == this) current = null;
+        super.onDestroy();
+    }
+
+    private int dp(int v) { return Math.round(getResources().getDisplayMetrics().density * v); }
+
+    // Called when the call ends elsewhere (remote hang-up / another device answered) so the ring screen goes away.
+    static void dismissIfShowing() {
+        final IncomingCallActivity a = current;
+        if (a != null) a.runOnUiThread(() -> {
+            a.stopRinging();
+            if (!a.isFinishing()) a.finish();
+        });
+    }
+}

mobile/plugins/native-call/android/src/main/java/com/bizgaze/connect/nativecall/NativeCallPlugin.java

@@ -0,0 +1,131 @@
+package com.bizgaze.connect.nativecall;
+
+import com.getcapacitor.JSObject;
+import com.getcapacitor.Plugin;
+import com.getcapacitor.PluginCall;
+import com.getcapacitor.PluginMethod;
+import com.getcapacitor.annotation.CapacitorPlugin;
+import com.google.firebase.messaging.FirebaseMessaging;
+
+// Native calling for Biz Connect (Android). Registered by `cap sync` as window.Capacitor.Plugins.NativeCall —
+// the SAME jsName the iOS plugin uses, so the web bridge (setupNativeCall in home.html) drives both platforms
+// through one code path.
+//
+// INCREMENT 1 (ring + answer): rings incoming calls with a full-screen-over-the-lock-screen UI (Android's
+// answer to CallKit), woken by a high-priority FCM DATA message even when the app is closed
+// (BzCallMessagingService). Answer/decline are bridged back to the WebView, which joins the meeting the normal
+// way — MEDIA STILL RUNS IN THE WEBVIEW for now (works in the foreground). Background call audio via a native
+// LiveKit connection + a foreground service is Increment 2, mirroring the iOS build history.
+//
+// The video / screen-share / hole-punch / transcription methods the iOS plugin implements are declared here as
+// safe no-ops so the shared web bridge never rejects when it calls them on Android; they get real bodies in the
+// later increments.
+@CapacitorPlugin(name = "NativeCall")
+public class NativeCallPlugin extends Plugin {
+
+    // The live plugin instance + a buffered answer for the cold-start case (a call answered from a killed app:
+    // the answer arrives before the WebView/JS has attached a listener). notifyListeners(..., retain=true) also
+    // buffers, but when the plugin itself isn't loaded yet we hold the event here and flush it in load().
+    private static NativeCallPlugin instance;
+    private static JSObject pendingAnswer;
+
+    @Override
+    public void load() {
+        instance = this;
+        if (pendingAnswer != null) {
+            JSObject a = pendingAnswer;
+            pendingAnswer = null;
+            notifyListeners("answerCall", a, true);
+        }
+    }
+
+    @Override
+    protected void handleOnDestroy() {
+        super.handleOnDestroy();
+        if (instance == this) instance = null;
+    }
+
+    // Called from IncomingCallActivity when the user accepts. Fires the shared "answerCall" event the web
+    // listens for; retained so a killed/locked pickup isn't lost before the WebView JS attaches.
+    static void deliverAnswer(JSObject data) {
+        if (instance != null) instance.notifyListeners("answerCall", data, true);
+        else pendingAnswer = data;
+    }
+
+    // Called on decline / remote hang-up. The web ends/declines the call server-side.
+    static void deliverEnd(JSObject data) {
+        if (instance != null) instance.notifyListeners("endCall", data);
+    }
+
+    // MARK: - JS-callable methods
+
+    // The FCM registration token — the same token @capacitor/push-notifications registers as an "android"
+    // device, which is exactly what the server call-wake targets. Returned so the web can confirm/re-register.
+    @PluginMethod
+    public void getToken(final PluginCall call) {
+        FirebaseMessaging.getInstance().getToken().addOnCompleteListener(task -> {
+            JSObject ret = new JSObject();
+            ret.put("token", task.isSuccessful() && task.getResult() != null ? task.getResult() : "");
+            call.resolve(ret);
+        });
+    }
+
+    // Ring CallKit-style from a WebSocket call event (a 2nd path alongside the FCM push, for when the app is
+    // open). Deduped by callUUID in CallStore, so double-firing with the push is harmless.
+    @PluginMethod
+    public void reportIncomingCall(PluginCall call) {
+        String uuid = call.getString("callUUID", "");
+        if (uuid.isEmpty()) { call.reject("callUUID required"); return; }
+        if (CallStore.isKnown(uuid)) { call.resolve(); return; }
+        java.util.Map<String, String> c = new java.util.HashMap<>();
+        c.put("callUUID", uuid);
+        c.put("room", call.getString("room", ""));
+        c.put("kind", call.getString("kind", "dm"));
+        c.put("callerId", call.getString("callerId", ""));
+        c.put("callerName", call.getString("callerName", call.getString("groupName", "Incoming call")));
+        c.put("groupId", call.getString("groupId", ""));
+        c.put("groupName", call.getString("groupName", ""));
+        c.put("hasVideo", Boolean.toString(Boolean.TRUE.equals(call.getBoolean("hasVideo", false))));
+        CallStore.showIncoming(getContext(), c);
+        call.resolve();
+    }
+
+    // Outgoing call from the web app. Increment 1: media stays in the WebView, so there is nothing to ring or
+    // connect natively here — the callee is rung by the server's FCM call-wake. Just record it so a later
+    // endCall/cancel can match. (Increment 2 will start a foreground service + native LiveKit here.)
+    @PluginMethod
+    public void reportOutgoingCall(PluginCall call) {
+        String uuid = call.getString("callUUID", "");
+        if (!uuid.isEmpty()) CallStore.markActive(uuid);
+        call.resolve();
+    }
+
+    // Stop ringing / clear the incoming UI for a call (remote hung up, we ended, or another device answered).
+    @PluginMethod
+    public void endCall(PluginCall call) {
+        String uuid = call.getString("callUUID", "");
+        if (!uuid.isEmpty()) CallStore.markEnded(uuid);
+        CallStore.cancel(getContext());
+        IncomingCallActivity.dismissIfShowing();
+        call.resolve();
+    }
+
+    // Increment 1: mute is handled by the WebView (it owns the media). No-op so the shared bridge doesn't reject.
+    @PluginMethod public void setMuted(PluginCall call) { call.resolve(); }
+
+    // --- Increment 2+ methods (video / screen-share / hole-punch / #12 reconnect / #5 transcript). Safe no-ops
+    // for now so the shared web bridge never rejects on Android; real bodies land with the native-media build. ---
+    @PluginMethod public void reconnectRoom(PluginCall call) { call.resolve(); }
+    @PluginMethod public void setCamera(PluginCall call) { call.resolve(); }
+    @PluginMethod public void switchCamera(PluginCall call) { call.resolve(); }
+    @PluginMethod public void startScreenShare(PluginCall call) { call.resolve(); }
+    @PluginMethod public void stopScreenShare(PluginCall call) { call.resolve(); }
+    @PluginMethod public void startMeetingScreenShare(PluginCall call) { call.resolve(); }
+    @PluginMethod public void stopMeetingScreenShare(PluginCall call) { call.resolve(); }
+    @PluginMethod public void setHolePunch(PluginCall call) { call.resolve(); }
+    @PluginMethod public void setTileZoom(PluginCall call) { call.resolve(); }
+    @PluginMethod public void syncVideoTiles(PluginCall call) { call.resolve(); }
+    @PluginMethod public void startTranscription(PluginCall call) { call.resolve(); }
+    @PluginMethod public void stopTranscription(PluginCall call) { call.resolve(); }
+    @PluginMethod public void feedAudio(PluginCall call) { call.resolve(); }
+}

mobile/plugins/native-call/package.json

@@ -10,12 +10,17 @@
   "files": [
     "dist/",
     "ios/",
+    "android/src/main/",
+    "android/build.gradle",
     "NativeCall.podspec",
     "Package.swift"
   ],
   "capacitor": {
     "ios": {
       "src": "ios"
+    },
+    "android": {
+      "src": "android"
     }
   },
   "devDependencies": {