Android How to - Use Intent to do Speech Recognize

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The following code shows how to Use Intent to do Speech Recognize.

Example

Register permission for RECORD_AUDIO.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.java2s.myapplication3.app" >
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />
    <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="java2s.com"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.java2s.myapplication3.app.MainActivity"
            android:label="java2s.com"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Main activity Java code

package com.java2s.myapplication3.app;
/*  w w w.  ja v a2s.co  m*/
import java.util.ArrayList;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    private static final int REQUEST_RECOGNIZE = 100;

    TextView tv;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        tv = new TextView(this);
        setContentView(tv);

        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Tell Me Your Name");
        try {
            startActivityForResult(intent, REQUEST_RECOGNIZE);
        } catch (ActivityNotFoundException e) {
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("Not Available");
            builder.setMessage("There is currently no recognition software installed.  Would you like to download one?");
            builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    //Download, for example, Google Voice Search
                    Intent marketIntent = new Intent(Intent.ACTION_VIEW);
                    marketIntent.setData(Uri.parse("market://details?id=com.google.android.voicesearch"));
                }
            });
            builder.setNegativeButton("No", null);
            builder.create().show();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(requestCode == REQUEST_RECOGNIZE && resultCode == Activity.RESULT_OK) {
            ArrayList<String> matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            StringBuilder sb = new StringBuilder();
            for(String piece : matches) {
                sb.append(piece);
                sb.append('\n');
            }
            tv.setText(sb.toString());
        } else {
            Toast.makeText(this, "Operation Canceled", Toast.LENGTH_SHORT).show();
        }
    }
}

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