Is it possible to use android's speech recognition without showing the dialog?

Question

I want to use the speech to text api in android, but I don't want to be slowed down by those dialogs. Is it possible to use the functionality without them?

Answer 1

Yes it is possible:

You can use the SpeechRecognizer class from the API. Make sure it is used in the main thread - as required according to the API - and that your class implements the RecognitionListener.

private SpeechRecognizer speech;

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    speech = SpeechRecognizer.createSpeechRecognizer(this);
    speech.setRecognitionListener(this);

    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE, "en");
    intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,
        this.getPackageName());

    speech.startListening(intent);
}

@Override
public void onBeginningOfSpeech()
{
}

@Override
public void onBufferReceived(byte[] arg0)
{
}

@Override
public void onEndOfSpeech()
{
}

@Override
public void onError(int e)
{
}

@Override
public void onEvent(int arg0, Bundle arg1)
{
}

@Override
public void onPartialResults(Bundle arg0)
{
}

@Override
public void onReadyForSpeech(Bundle arg0)
{
}

@Override
public void onResults(Bundle data)
{
    ArrayList<String> matches = data.getStringArrayList(
        SpeechRecognizer.RESULTS_RECOGNITION);

    // Do something useful with the matches =)
    // ...
}

@Override
public void onRmsChanged(float arg0)
{
}

Answer 2

try this code

import java.util.ArrayList;

import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.ToggleButton;

public class VoiceRecognitionActivity extends Activity implements RecognitionListener {

    private TextView returnedText;
    private ToggleButton toggleButton;
    private ProgressBar progressBar;
    private SpeechRecognizer speech = null;
    private Intent recognizerIntent;
    private String LOG_TAG = "VoiceRecognitionActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_voice_recognition);
        returnedText = (TextView) findViewById(R.id.textView1);
        progressBar = (ProgressBar) findViewById(R.id.progressBar1);
        toggleButton = (ToggleButton) findViewById(R.id.toggleButton1);

        progressBar.setVisibility(View.INVISIBLE);
        speech = SpeechRecognizer.createSpeechRecognizer(this);
        speech.setRecognitionListener(this);
        recognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE,"en");
        recognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,this.getPackageName());
        recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_WEB_SEARCH);
        recognizerIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 3);

        toggleButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView,
                    boolean isChecked) {
                if (isChecked) {
                    progressBar.setVisibility(View.VISIBLE);
                    progressBar.setIndeterminate(true);
                    speech.startListening(recognizerIntent);
                } else {
                    progressBar.setIndeterminate(false);
                    progressBar.setVisibility(View.INVISIBLE);
                    speech.stopListening();
                }
            }
        });

    }

    @Override
    public void onResume() {
        super.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (speech != null) {
            speech.destroy();
            Log.i(LOG_TAG, "destroy");
        }

    }

    @Override
    public void onBeginningOfSpeech() {
        Log.i(LOG_TAG, "onBeginningOfSpeech");
        progressBar.setIndeterminate(false);
        progressBar.setMax(10);
    }

    @Override
    public void onBufferReceived(byte[] buffer) {
        Log.i(LOG_TAG, "onBufferReceived: " + buffer);
    }

    @Override
    public void onEndOfSpeech() {
        Log.i(LOG_TAG, "onEndOfSpeech");
        progressBar.setIndeterminate(true);
        toggleButton.setChecked(false);
    }

    @Override
    public void onError(int errorCode) {
        String errorMessage = getErrorText(errorCode);
        Log.d(LOG_TAG, "FAILED " + errorMessage);
        returnedText.setText(errorMessage);
        toggleButton.setChecked(false);
    }

    @Override
    public void onEvent(int arg0, Bundle arg1) {
        Log.i(LOG_TAG, "onEvent");
    }

    @Override
    public void onPartialResults(Bundle arg0) {
        Log.i(LOG_TAG, "onPartialResults");
    }

    @Override
    public void onReadyForSpeech(Bundle arg0) {
        Log.i(LOG_TAG, "onReadyForSpeech");
    }

    @Override
    public void onResults(Bundle results) {
        Log.i(LOG_TAG, "onResults");
        ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
        String text = "";
        for (String result : matches)
            text += result + "\n";

        returnedText.setText(text);
    }

    @Override
    public void onRmsChanged(float rmsdB) {
        Log.i(LOG_TAG, "onRmsChanged: " + rmsdB);
        progressBar.setProgress((int) rmsdB);
    }

    public static String getErrorText(int errorCode) {
        String message;
        switch (errorCode) {
        case SpeechRecognizer.ERROR_AUDIO:
            message = "Audio recording error";
            break;
        case SpeechRecognizer.ERROR_CLIENT:
            message = "Client side error";
            break;
        case SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS:
            message = "Insufficient permissions";
            break;
        case SpeechRecognizer.ERROR_NETWORK:
            message = "Network error";
            break;
        case SpeechRecognizer.ERROR_NETWORK_TIMEOUT:
            message = "Network timeout";
            break;
        case SpeechRecognizer.ERROR_NO_MATCH:
            message = "No match";
            break;
        case SpeechRecognizer.ERROR_RECOGNIZER_BUSY:
            message = "RecognitionService busy";
            break;
        case SpeechRecognizer.ERROR_SERVER:
            message = "error from server";
            break;
        case SpeechRecognizer.ERROR_SPEECH_TIMEOUT:
            message = "No speech input";
            break;
        default:
            message = "Didn't understand, please try again.";
            break;
        }
        return message;
    }

}

activity_voice_recognition.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:src="@drawable/ic_launcher" />

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/toggleButton1"
        android:layout_marginTop="28dp"
        android:paddingLeft="10dp"
        android:paddingRight="10dp" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/progressBar1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="47dp" />

    <ToggleButton
        android:id="@+id/toggleButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="26dp"
        android:text="ToggleButton" />

</RelativeLayout>

AndroidManifest.xml

<manifest 
xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.rakesh.voicerecognitionexample"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

 <uses-permission android:name="android.permission.RECORD_AUDIO"/> 
 <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity
            android:name=".VoiceRecognitionActivity"
            android:label="@string/title_activity_voice_recognition" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>