How to create TextToSpeech in an android app?

This example demonstrates how do I create TextToSpeech in an android app.

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.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
   xmlns:tools="https://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   android:gravity="center"
   tools:context=".MainActivity">
   <EditText
      android:id="@+id/editText"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_marginBottom="16dp"
      android:hint="Enter Text" />
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Pitch"
      android:textSize="16sp" />
   <SeekBar
      android:id="@+id/seekBarPitch"
      android:layout_width="200dp"
      android:layout_height="wrap_content"
      android:progress="50" />
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Speed"
      android:textSize="16sp" />
   <SeekBar
      android:id="@+id/seekBarSpeed"
      android:layout_width="200dp"
      android:layout_height="wrap_content"
      android:layout_marginBottom="16dp"
      android:progress="50" />
   <Button
      android:id="@+id/btnSpeak"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:enabled="false"
      android:text="Say it!" />
</LinearLayout>

Step 3 − Add the following code to src/MainActivity.java

import android.speech.tts.TextToSpeech;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
   private TextToSpeech textToSpeech;
   private EditText editText;
   private SeekBar seekBarPitch;
   private SeekBar seekBarSpeed;
   private Button buttonSpeak;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      buttonSpeak = findViewById(R.id.btnSpeak);
      textToSpeech = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
         @Override
         public void onInit(int status) {
            if (status == TextToSpeech.SUCCESS) {
               int result = textToSpeech.setLanguage(Locale.ENGLISH);
               if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                  Log.e("TextToSpeech", "Language not supported");
               } else {
                  buttonSpeak.setEnabled(true);
               }
            } else {
               Log.e("TextToSpeech", "Initialization failed");
            }
         }
      });
      editText = findViewById(R.id.editText);
      seekBarPitch = findViewById(R.id.seekBarPitch);
      seekBarSpeed = findViewById(R.id.seekBarSpeed);
      buttonSpeak.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            speak();
         }
      });
   }
   private void speak() {
      String text = editText.getText().toString();
      float pitch = (float) seekBarPitch.getProgress() / 50;
      if (pitch < 0.1) pitch = 0.1f;
      float speed = (float) seekBarSpeed.getProgress() / 50;
      if (speed < 0.1) speed = 0.1f;
      textToSpeech.setPitch(pitch);
      textToSpeech.setSpeechRate(speed);
      textToSpeech.speak(text, TextToSpeech.QUEUE_FLUSH, null);
   }
   @Override
   protected void onDestroy() {
      if (textToSpeech != null) {
         textToSpeech.stop();
         textToSpeech.shutdown();
      }
      super.onDestroy();
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="https://schemas.android.com/apk/res/android" package="app.com.sample">
   <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 Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –