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java.lang.NullPointerException when using Talktospeech objects

Discussion in 'Android Apps & Games' started by siddhushettar, Dec 17, 2011.

  1. siddhushettar

    siddhushettar Lurker
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    Dec 17, 2011
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    I am trying to create a mobile app, when the app is launched it should speak some words(Say for example Welome to this app... etc etc). but somehow i am unable to come up with a solution. Can someone please help me in this?

    package com.example.helloworld;
    import java.util.Locale;

    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.speech.tts.TextToSpeech;
    import android.speech.tts.TextToSpeech.OnInitListener;
    import android.widget.Toast;

    public class HelloAndroid extends Activity implements OnInitListener
    {
    TextToSpeech myTTS;
    private static final int MY_DATA_CHECK_CODE = 1;


    /** Called when the activity is first created. */
    @Override

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

    //check for TTS data
    Intent checkTTSIntent = new Intent();
    checkTTSIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
    startActivityForResult(checkTTSIntent, MY_DATA_CHECK_CODE);


    }

    @Override
    protected void onStart() {
    super.onStart();
    // The activity is about to become visible.
    String words = "Hi hi hi hi hi hi hi hi hi hi hi";
    speakWords(words);

    }

    //speak the user text
    private void speakWords(String speech) {
    myTTS.setLanguage(Locale.US);

    //speak straight away
    myTTS.speak("Hello welcome to this app......", TextToSpeech.QUEUE_FLUSH, null);
    }

    //act on result of TTS data check
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == MY_DATA_CHECK_CODE) {
    if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
    //the user has the necessary data - create the TTS
    myTTS = new TextToSpeech(this, this);
    }
    else {
    //no data - install it now
    Intent installTTSIntent = new Intent();
    installTTSIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
    startActivity(installTTSIntent);
    }
    }
    }
    //setup TTS
    public void onInit(int initStatus) {

    //check for successful instantiation

    }
    }




    Thanks in advance for your help
     

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  2. siddhushettar

    siddhushettar Lurker
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    12-17 12:34:02.414: W/dalvikvm(392): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
    12-17 12:34:02.424: E/AndroidRuntime(392): Uncaught handler: thread main exiting due to uncaught exception
    12-17 12:34:02.454: E/AndroidRuntime(392): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.helloworld/com.example.helloworld.HelloAndroid}: java.lang.NullPointerException
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.os.Handler.dispatchMessage(Handler.java:99)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.os.Looper.loop(Looper.java:123)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.ActivityThread.main(ActivityThread.java:4363)
    12-17 12:34:02.454: E/AndroidRuntime(392): at java.lang.reflect.Method.invokeNative(Native Method)
    12-17 12:34:02.454: E/AndroidRuntime(392): at java.lang.reflect.Method.invoke(Method.java:521)
    12-17 12:34:02.454: E/AndroidRuntime(392): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
    12-17 12:34:02.454: E/AndroidRuntime(392): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
    12-17 12:34:02.454: E/AndroidRuntime(392): at dalvik.system.NativeStart.main(Native Method)
    12-17 12:34:02.454: E/AndroidRuntime(392): Caused by: java.lang.NullPointerException
    12-17 12:34:02.454: E/AndroidRuntime(392): at com.example.helloworld.HelloAndroid.speakWords(HelloAndroid.java:43)
    12-17 12:34:02.454: E/AndroidRuntime(392): at com.example.helloworld.HelloAndroid.onStart(HelloAndroid.java:37)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1129)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.Activity.performStart(Activity.java:3723)
    12-17 12:34:02.454: E/AndroidRuntime(392): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2468)
    12-17 12:34:02.454: E/AndroidRuntime(392): ... 11 more
    12-17 12:34:02.484: I/dalvikvm(392): threadid=7: reacting to signal 3
    12-17 12:34:02.644: I/dalvikvm(392): Wrote stack trace to '/data/anr/traces.txt'
    12-17 12:34:07.995: I/Process(392): Sending signal. PID: 392 SIG: 9
    12-17 12:35:31.255: D/AndroidRuntime(418): Shutting down VM
    12-17 12:35:31.255: W/dalvikvm(418): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
    12-17 12:35:31.267: E/AndroidRuntime(418): Uncaught handler: thread main exiting due to uncaught exception
    12-17 12:35:31.285: E/AndroidRuntime(418): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.helloworld/com.example.helloworld.HelloAndroid}: java.lang.NullPointerException
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.os.Handler.dispatchMessage(Handler.java:99)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.os.Looper.loop(Looper.java:123)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.ActivityThread.main(ActivityThread.java:4363)
    12-17 12:35:31.285: E/AndroidRuntime(418): at java.lang.reflect.Method.invokeNative(Native Method)
    12-17 12:35:31.285: E/AndroidRuntime(418): at java.lang.reflect.Method.invoke(Method.java:521)
    12-17 12:35:31.285: E/AndroidRuntime(418): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
    12-17 12:35:31.285: E/AndroidRuntime(418): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
    12-17 12:35:31.285: E/AndroidRuntime(418): at dalvik.system.NativeStart.main(Native Method)
    12-17 12:35:31.285: E/AndroidRuntime(418): Caused by: java.lang.NullPointerException
    12-17 12:35:31.285: E/AndroidRuntime(418): at com.example.helloworld.HelloAndroid.speakWords(HelloAndroid.java:43)
    12-17 12:35:31.285: E/AndroidRuntime(418): at com.example.helloworld.HelloAndroid.onStart(HelloAndroid.java:37)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1129)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.Activity.performStart(Activity.java:3723)
    12-17 12:35:31.285: E/AndroidRuntime(418): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2468)
    12-17 12:35:31.285: E/AndroidRuntime(418): ... 11 more
    12-17 12:35:31.325: I/dalvikvm(418): threadid=7: reacting to signal 3
    12-17 12:35:31.447: I/dalvikvm(418): Wrote stack trace to '/data/anr/traces.txt'
    12-17 12:35:35.284: I/Process(418): Sending signal. PID: 418 SIG: 9
     

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