From 53387e66175938f8fccb5038b8189741196876ce Mon Sep 17 00:00:00 2001
From: AmitShilo <amitshi@assacnetworks.com>
Date: Fri, 20 Sep 2024 15:19:42 +0300
Subject: [PATCH 1/3] Implemented a microphone access service to handle
 background microphone usage in calls.

Signed-off-by: AmitShilo <alssamit@gmail.com>
---
 .../src/main/res/values/strings.xml           |  2 +
 vector/src/main/AndroidManifest.xml           |  7 +++
 .../app/core/services/CallAndroidService.kt   |  4 ++
 .../app/features/call/VectorCallActivity.kt   | 29 ++++++++++
 .../call/audio/MicrophoneAccessService.kt     | 53 +++++++++++++++++++
 .../notifications/NotificationUtils.kt        | 13 +++++
 6 files changed, 108 insertions(+)
 create mode 100644 vector/src/main/java/im/vector/app/features/call/audio/MicrophoneAccessService.kt

diff --git a/library/ui-strings/src/main/res/values/strings.xml b/library/ui-strings/src/main/res/values/strings.xml
index ef02e525af8..5bbb6351f71 100644
--- a/library/ui-strings/src/main/res/values/strings.xml
+++ b/library/ui-strings/src/main/res/values/strings.xml
@@ -652,6 +652,8 @@
 
     <string name="call_remove_jitsi_widget_progress">Ending call…</string>
 
+    <string name="microphone_in_use_title">Microphone in use</string>
+
     <!-- permissions Android M -->
     <string name="permissions_rationale_popup_title">Information</string>
     <!-- Note to translators: the translation MUST contain the string "${app_name}", which will be replaced by the application name -->
diff --git a/vector/src/main/AndroidManifest.xml b/vector/src/main/AndroidManifest.xml
index d13037b4a92..2a92e54865e 100644
--- a/vector/src/main/AndroidManifest.xml
+++ b/vector/src/main/AndroidManifest.xml
@@ -395,6 +395,13 @@
             android:foregroundServiceType="mediaProjection"
             tools:targetApi="Q" />
 
+        <service
+            android:name=".features.call.audio.MicrophoneAccessService"
+            android:exported="false"
+            android:foregroundServiceType="microphone"
+            android:permission="android.permission.FOREGROUND_SERVICE_MICROPHONE">
+        </service>
+
         <!-- Receivers -->
 
         <receiver
diff --git a/vector/src/main/java/im/vector/app/core/services/CallAndroidService.kt b/vector/src/main/java/im/vector/app/core/services/CallAndroidService.kt
index a4e3872e0f2..1f5b0f7b5c7 100644
--- a/vector/src/main/java/im/vector/app/core/services/CallAndroidService.kt
+++ b/vector/src/main/java/im/vector/app/core/services/CallAndroidService.kt
@@ -31,6 +31,7 @@ import im.vector.app.core.extensions.singletonEntryPoint
 import im.vector.app.core.extensions.startForegroundCompat
 import im.vector.app.features.call.CallArgs
 import im.vector.app.features.call.VectorCallActivity
+import im.vector.app.features.call.audio.MicrophoneAccessService
 import im.vector.app.features.call.telecom.CallConnection
 import im.vector.app.features.call.webrtc.WebRtcCall
 import im.vector.app.features.call.webrtc.WebRtcCallManager
@@ -208,6 +209,9 @@ class CallAndroidService : VectorAndroidService() {
             stopForegroundCompat()
             mediaSession?.isActive = false
             myStopSelf()
+
+            // Also stop the microphone service if it is running
+            stopService(Intent(this, MicrophoneAccessService::class.java))
         }
         val wasConnected = connectedCallIds.remove(callId)
         if (!wasConnected && !terminatedCall.isOutgoing && !rejected && endCallReason != EndCallReason.ANSWERED_ELSEWHERE) {
diff --git a/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt b/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
index 44801260389..b1e6b476138 100644
--- a/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
+++ b/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
@@ -22,6 +22,7 @@ import android.app.PictureInPictureParams
 import android.content.Context
 import android.content.Intent
 import android.content.Intent.FLAG_ACTIVITY_CLEAR_TOP
+import android.content.pm.PackageManager
 import android.graphics.Color
 import android.media.projection.MediaProjection
 import android.media.projection.MediaProjectionManager
@@ -57,6 +58,7 @@ import im.vector.app.core.utils.PERMISSIONS_FOR_VIDEO_IP_CALL
 import im.vector.app.core.utils.checkPermissions
 import im.vector.app.core.utils.registerForPermissionsResult
 import im.vector.app.databinding.ActivityCallBinding
+import im.vector.app.features.call.audio.MicrophoneAccessService
 import im.vector.app.features.call.dialpad.CallDialPadBottomSheet
 import im.vector.app.features.call.dialpad.DialPadFragment
 import im.vector.app.features.call.transfer.CallTransferActivity
@@ -245,6 +247,33 @@ class VectorCallActivity :
         }
     }
 
+    private fun startMicrophoneService() {
+        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED &&
+                ContextCompat.checkSelfPermission(this, android.Manifest.permission.FOREGROUND_SERVICE_MICROPHONE) == PackageManager.PERMISSION_GRANTED) {
+            Timber.tag(loggerTag.value).d("Starting MicrophoneAccessService.")
+            val intent = Intent(this, MicrophoneAccessService::class.java)
+            ContextCompat.startForegroundService(this, intent)
+        } else {
+            Timber.tag(loggerTag.value).w("Permissions not granted. Cannot start MicrophoneAccessService.")
+        }
+    }
+
+    private fun stopMicrophoneService() {
+        Timber.tag(loggerTag.value).d("Stopping MicrophoneAccessService (if needed).")
+        val intent = Intent(this, MicrophoneAccessService::class.java)
+        stopService(intent)
+    }
+
+    override fun onPause() {
+        super.onPause()
+        startMicrophoneService()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        stopMicrophoneService()
+    }
+
     override fun onDestroy() {
         detachRenderersIfNeeded()
         turnScreenOffAndKeyguardOn()
diff --git a/vector/src/main/java/im/vector/app/features/call/audio/MicrophoneAccessService.kt b/vector/src/main/java/im/vector/app/features/call/audio/MicrophoneAccessService.kt
new file mode 100644
index 00000000000..1cf2aee737d
--- /dev/null
+++ b/vector/src/main/java/im/vector/app/features/call/audio/MicrophoneAccessService.kt
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2024 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.call.audio
+
+import android.content.Intent
+import android.os.Binder
+import android.os.IBinder
+import dagger.hilt.android.AndroidEntryPoint
+import im.vector.app.core.extensions.startForegroundCompat
+import im.vector.app.core.services.VectorAndroidService
+import im.vector.app.features.notifications.NotificationUtils
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class MicrophoneAccessService : VectorAndroidService() {
+
+    @Inject lateinit var notificationUtils: NotificationUtils
+    private val binder = LocalBinder()
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        showMicrophoneAccessNotification()
+
+        return START_STICKY
+    }
+
+    private fun showMicrophoneAccessNotification() {
+        val notificationId = System.currentTimeMillis().toInt()
+        val notification = notificationUtils.buildMicrophoneAccessNotification()
+        startForegroundCompat(notificationId, notification)
+    }
+
+    override fun onBind(intent: Intent?): IBinder {
+        return binder
+    }
+
+    inner class LocalBinder : Binder() {
+        fun getService(): MicrophoneAccessService = this@MicrophoneAccessService
+    }
+}
diff --git a/vector/src/main/java/im/vector/app/features/notifications/NotificationUtils.kt b/vector/src/main/java/im/vector/app/features/notifications/NotificationUtils.kt
index 3acb4d287aa..bc050958930 100755
--- a/vector/src/main/java/im/vector/app/features/notifications/NotificationUtils.kt
+++ b/vector/src/main/java/im/vector/app/features/notifications/NotificationUtils.kt
@@ -538,6 +538,19 @@ class NotificationUtils @Inject constructor(
                 .build()
     }
 
+    /**
+     * Creates a notification indicating that the microphone is currently being accessed by the application.
+     */
+    fun buildMicrophoneAccessNotification(): Notification {
+        return NotificationCompat.Builder(context, SILENT_NOTIFICATION_CHANNEL_ID)
+                .setContentTitle(stringProvider.getString(CommonStrings.microphone_in_use_title))
+                .setSmallIcon(R.drawable.ic_call_answer)
+                .setPriority(NotificationCompat.PRIORITY_LOW)
+                .setColor(ThemeUtils.getColor(context, android.R.attr.colorPrimary))
+                .setCategory(NotificationCompat.CATEGORY_CALL)
+                .build()
+    }
+
     /**
      * Creates a notification that indicates the application is initializing.
      */

From aff6c011e88a5e31f9f7c4e1a9a49697afcc29e3 Mon Sep 17 00:00:00 2001
From: AmitShilo <alssamit@gmail.com>
Date: Thu, 26 Sep 2024 16:50:04 +0700
Subject: [PATCH 2/3] add declare for FOREGROUND_SERVICE_MICROPHONE in vector
 manifest

Signed-off-by: AmitShilo <alssamit@gmail.com>
---
 vector/src/main/AndroidManifest.xml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/vector/src/main/AndroidManifest.xml b/vector/src/main/AndroidManifest.xml
index 2a92e54865e..cc686dbda27 100644
--- a/vector/src/main/AndroidManifest.xml
+++ b/vector/src/main/AndroidManifest.xml
@@ -56,6 +56,9 @@
     <!-- Jitsi SDK is now API23+ -->
     <uses-sdk tools:overrideLibrary="com.swmansion.gesturehandler,org.jitsi.meet.sdk,com.oney.WebRTCModule,com.learnium.RNDeviceInfo,com.reactnativecommunity.asyncstorage,com.ocetnik.timer,com.calendarevents,com.reactnativecommunity.netinfo,com.kevinresol.react_native_default_preference,com.rnimmersive,com.rnimmersivemode,com.corbt.keepawake,com.BV.LinearGradient,com.horcrux.svg,com.oblador.performance,com.reactnativecommunity.slider,com.brentvatne.react,com.reactnativecommunity.clipboard,com.swmansion.gesturehandler.react,org.linusu,org.reactnative.maskedview,com.reactnativepagerview,com.swmansion.reanimated,com.th3rdwave.safeareacontext,com.swmansion.rnscreens,org.devio.rn.splashscreen,com.reactnativecommunity.webview,org.wonday.orientation" />
 
+    <!-- For MicrophoneAccessService -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MICROPHONE" />
+
     <!-- Adding CAMERA permission prevents Chromebooks to see the application on the PlayStore -->
     <!-- Tell that the Camera is not mandatory to install the application -->
     <uses-feature

From 05be9d071621bdeb90b93b4042324e922d931254 Mon Sep 17 00:00:00 2001
From: AmitShilo <alssamit@gmail.com>
Date: Tue, 8 Oct 2024 15:18:21 +0700
Subject: [PATCH 3/3] Bugfix: fix crash when getting call on lockscreen

Signed-off-by: AmitShilo <alssamit@gmail.com>
---
 .../app/features/call/VectorCallActivity.kt   | 25 ++++++++++++++-----
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt b/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
index b1e6b476138..483fdf8d717 100644
--- a/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
+++ b/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
@@ -16,6 +16,7 @@
 
 package im.vector.app.features.call
 
+import android.Manifest
 import android.app.Activity
 import android.app.KeyguardManager
 import android.app.PictureInPictureParams
@@ -41,6 +42,8 @@ import androidx.core.content.getSystemService
 import androidx.core.util.Consumer
 import androidx.core.view.isInvisible
 import androidx.core.view.isVisible
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.ProcessLifecycleOwner
 import com.airbnb.mvrx.Fail
 import com.airbnb.mvrx.Mavericks
 import com.airbnb.mvrx.viewModel
@@ -248,16 +251,26 @@ class VectorCallActivity :
     }
 
     private fun startMicrophoneService() {
-        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED &&
-                ContextCompat.checkSelfPermission(this, android.Manifest.permission.FOREGROUND_SERVICE_MICROPHONE) == PackageManager.PERMISSION_GRANTED) {
-            Timber.tag(loggerTag.value).d("Starting MicrophoneAccessService.")
-            val intent = Intent(this, MicrophoneAccessService::class.java)
-            ContextCompat.startForegroundService(this, intent)
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO)
+                == PackageManager.PERMISSION_GRANTED) {
+
+            // Only start the service if the app is in the foreground
+            if (isAppInForeground()) {
+                Timber.tag(loggerTag.value).v("Starting microphone foreground service")
+                val intent = Intent(this, MicrophoneAccessService::class.java)
+                ContextCompat.startForegroundService(this, intent)
+            } else {
+                Timber.tag(loggerTag.value).v("App is not in foreground; cannot start microphone service")
+            }
         } else {
-            Timber.tag(loggerTag.value).w("Permissions not granted. Cannot start MicrophoneAccessService.")
+            Timber.tag(loggerTag.value).v("Microphone permission not granted; cannot start service")
         }
     }
 
+    private fun isAppInForeground(): Boolean {
+        val appProcess = ProcessLifecycleOwner.get().lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED)
+        return appProcess
+    }
     private fun stopMicrophoneService() {
         Timber.tag(loggerTag.value).d("Stopping MicrophoneAccessService (if needed).")
         val intent = Intent(this, MicrophoneAccessService::class.java)