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Text to Speech in Android

Posted on November 24, 2021November 24, 2021 By christo No Comments on Text to Speech in Android

Full source code to use the text to speech API in Android. We will set up ab OnInitListener, override the onInit method, set our desired language and take care of any Exceptions. We will also adjust the pitch and speed of the spoken text using SeekBars

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context="tech.codingpoint.texttospeechexample.MainActivity">

    <EditText
        android:id="@+id/edit_text"
        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/seek_bar_pitch"
        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/seek_bar_speed"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="16dp"
        android:progress="50" />

    <Button
        android:id="@+id/button_speak"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:enabled="false"
        android:text="Say it!" />

</LinearLayout>

MainActivity.java

package tech.codingpoint.texttospeechexample;

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 mTTS;
    private EditText mEditText;
    private SeekBar mSeekBarPitch;
    private SeekBar mSeekBarSpeed;
    private Button mButtonSpeak;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mButtonSpeak = findViewById(R.id.button_speak);

        mTTS = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int status) {
                if (status == TextToSpeech.SUCCESS) {
                    int result = mTTS.setLanguage(Locale.GERMAN);

                    if (result == TextToSpeech.LANG_MISSING_DATA
                            || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                        Log.e("TTS", "Language not supported");
                    } else {
                        mButtonSpeak.setEnabled(true);
                    }
                } else {
                    Log.e("TTS", "Initialization failed");
                }
            }
        });

        mEditText = findViewById(R.id.edit_text);
        mSeekBarPitch = findViewById(R.id.seek_bar_pitch);
        mSeekBarSpeed = findViewById(R.id.seek_bar_speed);

        mButtonSpeak.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                speak();
            }
        });
    }

    private void speak() {
        String text = mEditText.getText().toString();
        float pitch = (float) mSeekBarPitch.getProgress() / 50;
        if (pitch < 0.1) pitch = 0.1f;
        float speed = (float) mSeekBarSpeed.getProgress() / 50;
        if (speed < 0.1) speed = 0.1f;

        mTTS.setPitch(pitch);
        mTTS.setSpeechRate(speed);

        mTTS.speak(text, TextToSpeech.QUEUE_FLUSH, null);
    }

    @Override
    protected void onDestroy() {
        if (mTTS != null) {
            mTTS.stop();
            mTTS.shutdown();
        }

        super.onDestroy();
    }
}
android Tags:Android, Text to Speech

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