Text to Speech Using Google Engine in Android
I am developing a simple android application, I have a problem with TextToSpeech.
The app is supposed to speak alphabet letters and numbers using TextToSpeech, but there is a problem, devices use PicoTTS by default, I would like them to be forced to use google tts engine.
How can i do this?
My code:
@SuppressLint("NewApi")
public class LearnAlphabet extends Activity {
Button howto, number, alphabet;
public TextToSpeech tts;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.learn_number);
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#0170a5")));
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new NumberFunction(this));
final String locale = getApplicationContext().getResources().getConfiguration().locale.getLanguage();
tts = new TextToSpeech(getApplicationContext(),
new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(status != TextToSpeech.ERROR){
switch (locale.toString()) {
case "it":
tts.setLanguage(new Locale("it_IT"));
break;
case "en":
tts.setLanguage(new Locale("en_US"));
break;
case "es":
tts.setLanguage(new Locale("es_ES"));
break;
case "de":
tts.setLanguage(new Locale("de_NL"));
break;
case "ru":
tts.setLanguage(new Locale("ru_RU"));
break;
default:
tts.setLanguage(new Locale("en_US"));
break;
}
}
}
});
}
and for each letter or number:
tts.speak(getResources().getString(R.string.a), TextToSpeech.QUEUE_FLUSH, null);
**** EDIT ***** Error if I set: tts.setEngineByPackageName ("com.google.android.tts")
12-11 15:52:04.954: E/AndroidRuntime(12203): FATAL EXCEPTION: main
12-11 15:52:04.954: E/AndroidRuntime(12203): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.imparafacile/com.imparafacile.LearnAlphabet}: java.lang.NullPointerException
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2261)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2311)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.ActivityThread.access$600(ActivityThread.java:149)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1293)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.os.Handler.dispatchMessage(Handler.java:99)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.os.Looper.loop(Looper.java:137)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.ActivityThread.main(ActivityThread.java:5214)
12-11 15:52:04.954: E/AndroidRuntime(12203): at java.lang.reflect.Method.invokeNative(Native Method)
12-11 15:52:04.954: E/AndroidRuntime(12203): at java.lang.reflect.Method.invoke(Method.java:525)
12-11 15:52:04.954: E/AndroidRuntime(12203): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)
12-11 15:52:04.954: E/AndroidRuntime(12203): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
12-11 15:52:04.954: E/AndroidRuntime(12203): at dalvik.system.NativeStart.main(Native Method)
12-11 15:52:04.954: E/AndroidRuntime(12203): Caused by: java.lang.NullPointerException
12-11 15:52:04.954: E/AndroidRuntime(12203): at com.imparafacile.LearnAlphabet.onCreate(LearnAlphabet.java:47)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.Activity.performCreate(Activity.java:5133)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-11 15:52:04.954: E/AndroidRuntime(12203): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2225)
+3
user4252099
source
to share
1 answer
Called by NPE because the tts object is null when tts.setEngineByPackageName () is called.
tts will not be created until onInit()
it returns successfully, so you must call tts.setEngineByPackageName () in onInit()
:
String googleTtsPackage = "com.google.android.tts", picoPackage = "com.svox.pico";
tts = new TextToSpeech(getApplicationContext(),
new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(status != TextToSpeech.ERROR){
if(!isPackageInstalled(getPackageManager(), googleTtsPackage))
confirmDialog();
else myTTS.setEngineByPackageName(googleTtsPackage);
}
private void confirmDialog(){
AlertDialog.Builder d = new AlertDialog.Builder(LearnAlphabet.this);
d.setTitle("Install recommeded speech engine?");
d.setMessage("Your device isn't using the recommended speech engine. Do you wish to install it?");
d.setPositiveButton("Yes", new android.content.DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int arg1){
Intent installVoice = new Intent(Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installVoice);
}});
d.setNegativeButton("No, later", new android.content.DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int arg1){
if(isPackageInstalled(context.getPackageManager(), picoPackage))
myTTS.setEngineByPackageName(picoPackage);
}
});
d.show();
}
public static boolean isPackageInstalled(PackageManager pm, String packageName) {
try {
pm.getPackageInfo(packageName, 0);
} catch (NameNotFoundException e) {
return false;
}
return true;
}
You can remove confirmDialog () if you are not interested in redirecting users to install Google TTS engine if not installed.
+1
source to share