SpeechToText

 Android Speech To Text its similar to Android Text To Speech, but here in this code reverse to text to speech and shown example code below.

Activity_main.xml :-

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 

 xmlns:android="http://schemas.android.com/apk/res/android" 

 android:layout_width="match_parent" 

 android:layout_height="match_parent" 

 android:orientation="vertical" 

 android:textAlignment="center">
<TextView 

 android:layout_width="wrap_content" 

 android:layout_height="wrap_content" 

 android:textAppearance="?android:attr/textAppearanceLarge" 

 android:text="Android SpeechToText " 

 android:id="@+id/textView" 

 android:layout_gravity="center_horizontal" />

<Button 

 android:layout_width="wrap_content" 

 android:layout_height="wrap_content" 

 android:text="speak" 

 android:layout_marginTop="20dp" 

 android:id="@+id/button" 

 android:layout_gravity="center_horizontal" />

<EditText 

 android:layout_width="124dp" 

 android:layout_height="wrap_content" 

 android:id="@+id/editText" 

 android:layout_gravity="center_horizontal" 

 android:hint="input" />

</LinearLayout>

MainActivity.java :-

package com.kiranapp;

import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    Button speak;
    TextView input;
@Override 

 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 speak=(Button)findViewById(R.id.button);
 input=(TextView)findViewById(R.id.textView);
 speak.setOnClickListener(new View.OnClickListener() {
@Override 

 public void onClick(View v) {
 Intent intent=new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
 intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,"en_US");
 try {
 startActivityForResult(intent,1);
 }

 catch (Exception e) {
 e.printStackTrace();
 Toast.makeText(MainActivity.this, "Dude Your phone does not 

                            support Speech to Text",Toast.LENGTH_SHORT).show();
 }
 }
 });
 }

@Override 

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 if(requestCode==1){
 if(resultCode==RESULT_OK&&data!=null) {
 ArrayList<String> al=data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
 input.setText(al.get(0));
 }
 }
 super.onActivityResult(requestCode, resultCode, data);
 }

 }

Output :-

Android Speech To Text