<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="com.codinginflow.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>

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 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();
	}
	}