Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to develop an Speech recognizer in Android without Google API in Kotlin?
This example demonstrates how to develop an Speech recognizer in Android without Google API in Kotlin.
Step 1 − Create a new project in Android Studio, go to File ? New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
Example
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <ImageView android:id="@+id/imageView" android:layout_width="200dp" android:layout_height="200dp" android:layout_centerInParent="true" android:src="@drawable/ic_mic" /> <ProgressBar android:id="@+id/progressBar" style="?android:attr/progressBarStyleHorizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/toggleButton" android:layout_alignParentStart="true" android:layout_marginTop="28dp" android:paddingLeft="10dp" android:paddingRight="10dp" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/progressBar" android:layout_centerHorizontal="true" android:layout_marginTop="47dp" /> <ToggleButton android:id="@+id/toggleButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="26dp" android:text="ToggleButton" /> </RelativeLayout>
Step 3 − Add the following code to src/MainActivity.kt
Example
import android.Manifest
import android.content.Intent
import android.content.pm.PackageManager
import android.os.Bundle
import android.speech.RecognitionListener
import android.speech.RecognizerIntent
import android.speech.SpeechRecognizer
import android.util.Log
import android.view.View
import android.widget.ProgressBar
import android.widget.TextView
import android.widget.Toast
import android.widget.ToggleButton
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
class MainActivity : AppCompatActivity(), RecognitionListener {
private val permission = 100
private lateinit var returnedText: TextView
private lateinit var toggleButton: ToggleButton
private lateinit var progressBar: ProgressBar
private lateinit var speech: SpeechRecognizer
private lateinit var recognizerIntent: Intent
private var logTag = "VoiceRecognitionActivity"
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
title = "KotlinApp"
returnedText = findViewById(R.id.textView)
progressBar = findViewById(R.id.progressBar)
toggleButton = findViewById(R.id.toggleButton)
progressBar.visibility = View.VISIBLE
speech = SpeechRecognizer.createSpeechRecognizer(this)
Log.i(logTag, "isRecognitionAvailable: " + SpeechRecognizer.isRecognitionAvailable(this))
speech.setRecognitionListener(this)
recognizerIntent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH)
recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE, "US-en")
recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
recognizerIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 3)
toggleButton.setOnCheckedChangeListener { _, isChecked ->
if (isChecked) {
progressBar.visibility = View.VISIBLE
progressBar.isIndeterminate = true
ActivityCompat.requestPermissions(this@MainActivity,
arrayOf(Manifest.permission.RECORD_AUDIO),
permission)
} else {
progressBar.isIndeterminate = false
progressBar.visibility = View.VISIBLE
speech.stopListening()
}
}
}
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String?>,
grantResults: IntArray) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
when (requestCode) {
permission -> if (grantResults.isNotEmpty() && grantResults[0] == PackageManager
.PERMISSION_GRANTED) {
speech.startListening(recognizerIntent)
} else {
Toast.makeText(this@MainActivity, "Permission Denied!",
Toast.LENGTH_SHORT).show()
}
}
}
override fun onStop() {
super.onStop()
speech.destroy()
Log.i(logTag, "destroy")
}
override fun onReadyForSpeech(params: Bundle?) {
TODO("Not yet implemented")
}
override fun onRmsChanged(rmsdB: Float) {
progressBar.progress = rmsdB.toInt()
}
override fun onBufferReceived(buffer: ByteArray?) {
TODO("Not yet implemented")
}
override fun onPartialResults(partialResults: Bundle?) {
TODO("Not yet implemented")
}
override fun onEvent(eventType: Int, params: Bundle?) {
TODO("Not yet implemented")
}
override fun onBeginningOfSpeech() {
Log.i(logTag, "onBeginningOfSpeech")
progressBar.isIndeterminate = false
progressBar.max = 10
}
override fun onEndOfSpeech() {
progressBar.isIndeterminate = true
toggleButton.isChecked = false
}
override fun onError(error: Int) {
val errorMessage: String = getErrorText(error)
Log.d(logTag, "FAILED $errorMessage")
returnedText.text = errorMessage
toggleButton.isChecked = false
}
private fun getErrorText(error: Int): String {
var message = ""
message = when (error) {
SpeechRecognizer.ERROR_AUDIO -> "Audio recording error"
SpeechRecognizer.ERROR_CLIENT -> "Client side error"
SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS -> "Insufficient permissions"
SpeechRecognizer.ERROR_NETWORK -> "Network error"
SpeechRecognizer.ERROR_NETWORK_TIMEOUT -> "Network timeout"
SpeechRecognizer.ERROR_NO_MATCH -> "No match"
SpeechRecognizer.ERROR_RECOGNIZER_BUSY -> "RecognitionService busy"
SpeechRecognizer.ERROR_SERVER -> "error from server"
SpeechRecognizer.ERROR_SPEECH_TIMEOUT -> "No speech input"
else -> "Didn't understand, please try again."
}
return message
}
override fun onResults(results: Bundle?) {
Log.i(logTag, "onResults")
val matches = results!!.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION)
var text = ""
for (result in matches) text = """
$result
""".trimIndent()
returnedText.text = text
}
}Step 4 − Add the following code to androidManifest.xml
Example
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.myapplication"> <uses-permission android:name="android.permission.RECORD_AUDIO" /> <uses-permission android:name="android.permission.INTERNET" /> <application 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/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon
from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Updated on: 23-May-2020
2K+ Views
Advertisements