I have been exploring the voice recognition sector of Android Studio. This was my first time developing an application with TextToSpeech and SpeechRecognizer. Whenever I tap on the voice button the app crashes. Please be aware that I am a beginner who does not have a thorough grasp of the Java.
package com.blindnavi.navirecog;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.speech.tts.TextToSpeech;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.format.DateUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
import java.util.Date;
import java.util.List;
import java.util.Locale;
public class NaviCaroline extends AppCompatActivity {
private TextToSpeech NaviVoice;
private SpeechRecognizer NaviSay;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navi_caroline);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 1);
NaviSay.startListening(intent);
}
});
initializeTextToSpeech();
initializeSpeechRecognizer();
}
private void initializeSpeechRecognizer() {
if(SpeechRecognizer.isRecognitionAvailable(this)) {
NaviSay = SpeechRecognizer.createSpeechRecognizer(this);
NaviSay.setRecognitionListener((new RecognitionListener() {
@Override
public void onReadyForSpeech(Bundle params) {
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onRmsChanged(float rmsdB) {
}
@Override
public void onBufferReceived(byte[] buffer) {
}
@Override
public void onEndOfSpeech() {
}
@Override
public void onError(int error) {
}
@Override
public void onResults(Bundle bundle) {
List<String> results = bundle.getStringArrayList(
SpeechRecognizer.RESULTS_RECOGNITION
);
processResult(results.get(0));
}
@Override
public void onPartialResults(Bundle partialResults) {
}
@Override
public void onEvent(int eventType, Bundle params) {
}
}));
}
}
private void processResult(String command) {
command = command.toLowerCase();
//what is your name
//what is the time
//open a browser
if(command.indexOf("what") != -1) {
if (command.indexOf("your name") != -1) {
speak("My name is Caroline.");
}
if (command.indexOf("time") != -1) {
Date now = new Date();
String time = DateUtils.formatDateTime(this, now.getTime(),
DateUtils.FORMAT_SHOW_TIME);
speak("The time now is " + time);
}
} else if(command.indexOf("open") != -1) {
if(command.indexOf("browser") != -1) {
Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse("https:/tutsplus.com"));
startActivity(intent);
}
}
}
private void initializeTextToSpeech() {
NaviVoice = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(NaviVoice.getEngines().size() == 0) {
Toast.makeText(NaviCaroline.this, "There is no TextToSpeech engine on your device.",
Toast.LENGTH_LONG);
finish();
} else {
NaviVoice.setLanguage(Locale.UK);
speak("Welcome to BlindNavi.");
}
}
});
}
private void speak(String message) {
if(Build.VERSION.SDK_INT >= 21) {
NaviVoice.speak(message, TextToSpeech.QUEUE_FLUSH, null, null);
} else {
NaviVoice.speak(message, TextToSpeech.QUEUE_FLUSH, null);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_navi_caroline, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onPause() {
super.onPause();
NaviVoice.shutdown();
}
}
Forgive me for adding so much code but I cannot find the issue anywhere.
Your help is greatly appreciated.
P.S The "record_audio" permission was created.
Stack trace:
07-17 16:05:22.062 16743-16743/com.blindnavi.navirecog E/BoostFramework: BoostFramework() : Exception_1 = java.lang.ClassNotFoundException: Didn't find class "com.qualcomm.qti.Performance" on path: DexPathList[[],nativeLibraryDirectories=[/system/lib64, /vendor/lib64]] 07-17 16:05:22.062 16743-16743/com.blindnavi.navirecog V/BoostFramework: BoostFramework() : mPerf = null 07-17 16:05:22.120 16743-16743/com.blindnavi.navirecog D/ViewRootImpl@e5200a4[NaviCaroline]: ViewPostImeInputStage processPointer 1 07-17 16:05:22.137 16743-16743/com.blindnavi.navirecog D/AndroidRuntime: Shutting down VM 07-17 16:05:22.138 16743-16743/com.blindnavi.navirecog E/AndroidRuntime: FATAL EXCEPTION: main Process: com.blindnavi.navirecog, PID: 16743 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.speech.SpeechRecognizer.startListening(android.content.Intent)' on a null object reference at com.blindnavi.navirecog.NaviCaroline$1.onClick(NaviCaroline.java:45) at android.view.View.performClick(View.java:6205) at android.view.View$PerformClick.run(View.java:23653) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6682) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
