feat: Add microphone connectivity status

app/src/main/java/app/myzel394/alibi/services/AudioRecorderService.kt

@@ -1,11 +1,20 @@
 package app.myzel394.alibi.services
 
+import android.annotation.SuppressLint
+import android.content.Context
+import android.media.AudioDeviceCallback
+import android.media.AudioDeviceInfo
 import android.media.AudioManager
 import android.media.MediaRecorder
 import android.media.MediaRecorder.OnErrorListener
 import android.os.Build
+import android.os.Handler
+import android.os.Looper
+import androidx.core.content.ContextCompat.getSystemService
+import app.myzel394.alibi.enums.RecorderState
 import app.myzel394.alibi.ui.utils.MicrophoneInfo
 import java.lang.IllegalStateException
+import java.util.concurrent.Executor
 
 class AudioRecorderService : IntervalRecorderService() {
     var amplitudesAmount = 1000
@@ -15,6 +24,8 @@ class AudioRecorderService : IntervalRecorderService() {
         private set
     var onError: () -> Unit = {}
     var onSelectedMicrophoneChange: (MicrophoneInfo?) -> Unit = {}
+    var onMicrophoneDisconnected: () -> Unit = {}
+    var onMicrophoneReconnected: () -> Unit = {}
 
     val filePath: String
         get() = "$folder/$counter.${settings!!.fileExtension}"
@@ -95,6 +106,12 @@ class AudioRecorderService : IntervalRecorderService() {
         }
     }
 
+    override fun start() {
+        super.start()
+
+        registerMicrophoneListener()
+    }
+
     override fun pause() {
         super.pause()
 
@@ -106,6 +123,7 @@ class AudioRecorderService : IntervalRecorderService() {
 
         resetRecorder()
         selectedMicrophone = null
+        unregisterMicrophoneListener()
     }
 
     override fun getAmplitudeAmount(): Int = amplitudesAmount
@@ -123,5 +141,51 @@ class AudioRecorderService : IntervalRecorderService() {
     fun changeMicrophone(microphone: MicrophoneInfo?) {
         selectedMicrophone = microphone
         onSelectedMicrophoneChange(microphone)
+
+        if (state == RecorderState.RECORDING) {
+            startNewCycle()
+        }
+    }
+
+    private val audioDeviceCallback = object : AudioDeviceCallback() {
+        override fun onAudioDevicesAdded(addedDevices: Array<out AudioDeviceInfo>?) {
+            super.onAudioDevicesAdded(addedDevices)
+
+            if (selectedMicrophone == null) {
+                return;
+            }
+
+            if (addedDevices?.find { it.id == selectedMicrophone!!.deviceInfo.id } != null) {
+                onMicrophoneReconnected()
+            }
+        }
+
+        override fun onAudioDevicesRemoved(removedDevices: Array<out AudioDeviceInfo>?) {
+            super.onAudioDevicesRemoved(removedDevices)
+
+            if (selectedMicrophone == null) {
+                return;
+            }
+
+            if (removedDevices?.find { it.id == selectedMicrophone!!.deviceInfo.id } != null) {
+                onMicrophoneDisconnected()
+            }
+        }
+    }
+
+    @SuppressLint("NewApi")
+    private fun registerMicrophoneListener() {
+        val audioManager = getSystemService(Context.AUDIO_SERVICE)!! as AudioManager
+
+        audioManager.registerAudioDeviceCallback(
+            audioDeviceCallback,
+            Handler(Looper.getMainLooper())
+        )
+    }
+
+    private fun unregisterMicrophoneListener() {
+        val audioManager = getSystemService(Context.AUDIO_SERVICE)!! as AudioManager
+
+        audioManager.unregisterAudioDeviceCallback(audioDeviceCallback)
     }
 }

app/src/main/java/app/myzel394/alibi/ui/models/AudioRecorderModel.kt

@@ -46,6 +46,14 @@ class AudioRecorderModel : ViewModel() {
     var onRecordingSave: () -> Unit = {}
     var onError: () -> Unit = {}
 
+    var microphoneStatus: MicrophoneConnectivityStatus = MicrophoneConnectivityStatus.CONNECTED
+        private set
+
+    enum class MicrophoneConnectivityStatus {
+        CONNECTED,
+        DISCONNECTED
+    }
+
     private val connection = object : ServiceConnection {
         override fun onServiceConnected(className: ComponentName, service: IBinder) {
             recorderService =
@@ -68,6 +76,12 @@ class AudioRecorderModel : ViewModel() {
                     recorder.onSelectedMicrophoneChange = { microphone ->
                         selectedMicrophone = microphone
                     }
+                    recorder.onMicrophoneDisconnected = {
+                        microphoneStatus = MicrophoneConnectivityStatus.DISCONNECTED
+                    }
+                    recorder.onMicrophoneReconnected = {
+                        microphoneStatus = MicrophoneConnectivityStatus.CONNECTED
+                    }
                 }.also {
                     // Init UI from the service
                     it.startRecording()
@@ -90,6 +104,7 @@ class AudioRecorderModel : ViewModel() {
         recordingTime = null
         amplitudes = emptyList()
         selectedMicrophone = null
+        microphoneStatus = MicrophoneConnectivityStatus.CONNECTED
     }
 
     fun startRecording(context: Context) {
@@ -131,6 +146,10 @@ class AudioRecorderModel : ViewModel() {
 
     fun changeMicrophone(microphone: MicrophoneInfo?) {
         recorderService!!.changeMicrophone(microphone)
+
+        if (microphone == null) {
+            microphoneStatus = MicrophoneConnectivityStatus.CONNECTED
+        }
     }
 
     fun bindToService(context: Context) {

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

@@ -65,4 +65,6 @@
     <string name="ui_settings_language_update_label">Change</string>
     <string name="ui_audioRecorder_info_microphone_deviceMicrophone">Device Microphone</string>
     <string name="ui_audioRecorder_info_microphone_changeExplanation">The selected microphone will be immediately activated</string>
+    <string name="ui_audioRecorder_error_microphoneDisconnected_title">Microphone disconnected</string>
+    <string name="ui_audioRecorder_error_microphoneDisconnected_message"><xliff:g name="name">%s</xliff:g> disconnected. Alibi will use the default microphone instead. We will automatically switch back to <xliff:g name="name">%s</xliff:g> once it reconnects.</string>
 </resources>