feat: Android bluetooth support #210

speech_to_text/CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## 5.4.0
+
+### New
+  * Support for bluetooth headsets in Android
+
 ## 5.3.0
 
 ### New

speech_to_text/README.md

@@ -1,6 +1,6 @@
 # speech_to_text
 
-[![pub package](https://img.shields.io/badge/pub-v5.3.0-blue)](https://pub.dartlang.org/packages/speech_to_text) [![build status](https://github.com/csdcorp/speech_to_text/workflows/build/badge.svg)](https://github.com/csdcorp/speech_to_text/actions?query=workflow%3Abuild) [![codecov](https://codecov.io/gh/csdcorp/speech_to_text/branch/main/graph/badge.svg?token=4LV3HESMS4)](undefined)
+[![pub package](https://img.shields.io/badge/pub-v5.4.0-blue)](https://pub.dartlang.org/packages/speech_to_text) [![build status](https://github.com/csdcorp/speech_to_text/workflows/build/badge.svg)](https://github.com/csdcorp/speech_to_text/actions?query=workflow%3Abuild) [![codecov](https://codecov.io/gh/csdcorp/speech_to_text/branch/main/graph/badge.svg?token=4LV3HESMS4)](undefined)
 
 A library that exposes device specific speech recognition capability.
 

speech_to_text/android/src/main/kotlin/com/csdcorp/speech_to_text/SpeechToTextPlugin.kt

@@ -5,6 +5,9 @@ import io.flutter.embedding.engine.plugins.FlutterPlugin
 import android.Manifest
 import android.annotation.TargetApi
 import android.app.Activity
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothHeadset
+import android.bluetooth.BluetoothProfile
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.os.Build
@@ -99,6 +102,10 @@ public class SpeechToTextPlugin :
     private var resultSent: Boolean = false
     private var speechRecognizer: SpeechRecognizer? = null
     private var recognizerIntent: Intent? = null
+    private var bluetoothAdapter: android.bluetooth.BluetoothAdapter? = null
+    private var pairedDevices: Set<android.bluetooth.BluetoothDevice>? = null
+    private var activeBluetooth: android.bluetooth.BluetoothDevice? = null
+    private var bluetoothHeadset: BluetoothHeadset? = null
     private var previousRecognizerLang: String? = null
     private var previousPartialResults: Boolean = true
     private var previousListenMode: ListenMode = ListenMode.deviceDefault
@@ -280,6 +287,7 @@ public class SpeechToTextPlugin :
         if ( listenModeIndex == ListenMode.dictation.ordinal) {
             listenMode = ListenMode.dictation
         }
+        optionallyStartBluetooth()
         setupRecognizerIntent(languageTag, partialResults, listenMode, onDevice )
         handler.post {
             run {
@@ -292,12 +300,37 @@ public class SpeechToTextPlugin :
         debugLog("Start listening done")
     }
 
+    private fun optionallyStartBluetooth() {
+        val lbt = bluetoothAdapter
+        val lpaired = pairedDevices
+        val lhead = bluetoothHeadset
+        if (null != lbt && null!= lhead && null != lpaired && lbt.isEnabled()) {
+            for (tryDevice in lpaired) {
+                //This loop tries to start VoiceRecognition mode on every paired device until it finds one that works(which will be the currently in use bluetooth headset)
+                if (lhead.startVoiceRecognition(tryDevice)) {
+                    activeBluetooth = tryDevice;
+                    break
+                }
+            }
+        }
+    }
+
+    private fun optionallyStopBluetooth() {
+        val lactive = activeBluetooth
+        val lbt = bluetoothHeadset
+        if (null != lactive && null != lbt ) {
+            lbt.stopVoiceRecognition(lactive)
+            activeBluetooth = null
+        }
+    }
+
     private fun stopListening(result: Result) {
         if (sdkVersionTooLow() || isNotInitialized() || isNotListening()) {
             result.success(false)
             return
         }
         debugLog("Stop listening")
+        optionallyStopBluetooth()
         handler.post {
             run {
                 speechRecognizer?.stopListening()
@@ -446,7 +479,7 @@ public class SpeechToTextPlugin :
                     activeResult = null
                     return
                 }
-
+                setupBluetooth()
                 createRecognizer()
             } else {
                 debugLog("null context during initialization")
@@ -466,6 +499,26 @@ public class SpeechToTextPlugin :
         activeResult = null
     }
 
+    private fun setupBluetooth() {
+        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter()
+        pairedDevices = bluetoothAdapter?.getBondedDevices()
+
+        val mProfileListener: BluetoothProfile.ServiceListener = object : BluetoothProfile.ServiceListener {
+            override fun onServiceConnected(profile: Int, proxy: BluetoothProfile) {
+                if (profile == BluetoothProfile.HEADSET) {
+                    bluetoothHeadset = proxy as BluetoothHeadset
+                }
+            }
+
+            override fun onServiceDisconnected(profile: Int) {
+                if (profile == BluetoothProfile.HEADSET) {
+                    bluetoothHeadset = null
+                }
+            }
+        }
+        bluetoothAdapter?.getProfileProxy(pluginContext, mProfileListener, BluetoothProfile.HEADSET)
+    }
+
     private fun Context.findComponentName(): ComponentName? {
         val list: List<ResolveInfo> = packageManager.queryIntentServices(Intent(RecognitionService.SERVICE_INTERFACE), 0)
         return list.firstOrNull()?.serviceInfo?.let { ComponentName(it.packageName, it.name) }

speech_to_text/example/android/app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
     package="com.csdcorp.speech_to_text_example">
     <uses-permission android:name="android.permission.RECORD_AUDIO"/>
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.BLUETOOTH"/>
     <queries>
         <intent>
             <action android:name="android.speech.RecognitionService" />

speech_to_text/example/android/build.gradle

@@ -6,7 +6,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.1'
+        classpath 'com.android.tools.build:gradle:7.0.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }

speech_to_text/example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip

speech_to_text/example/lib/repro.dart

@@ -85,7 +85,7 @@ class _MyHomePageState extends State<MyHomePage> {
   void _onResult(html.SpeechRecognitionEvent event) {
     var results = event.results;
     if (null == results) return;
-    for (html.SpeechRecognitionResult recognitionResult in results) {
+    for (var recognitionResult in results) {
       if (null == recognitionResult.length || recognitionResult.length == 0) {
         continue;
       }

speech_to_text/example/pubspec.lock

@@ -153,7 +153,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "5.3.0"
+    version: "5.4.0"
   speech_to_text_platform_interface:
     dependency: transitive
     description:

speech_to_text/pubspec.yaml

@@ -1,6 +1,6 @@
 name: speech_to_text
 description: A Flutter plugin that exposes device specific speech to text recognition capability. 
-version: 5.3.0
+version: 5.4.0
 homepage: https://github.com/csdcorp/speech_to_text
 
 environment: