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POstart activity for result gets null pointer exception
 

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  1. POstart activity for result gets null pointer exception
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    <p>I put speech function into a new class called voiceAssistants, however, when i start it, it always give me an null pointer exception error.</p> <p>voice Assistants:</p> <pre><code>public class VoiceAssistants { private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234; private static VoiceActivityHelper voiceAssistants; public VoiceAssistants(){ voiceAssistants = new VoiceActivityHelper(); } /** * Start voice input */ public void starVoiceAssistants(){ this.voiceAssistants.startVoiceRecognitionActivity(); } private static class VoiceActivityHelper extends Activity { private static ArrayList&lt;String&gt; matches; public ArrayList&lt;String&gt; getResultSet(){ return matches; } private void startVoiceRecognitionActivity() { Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, String.format( "%s_%s", Locale.getDefault().getLanguage(), Locale .getDefault().getCountry())); intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo"); //error happen here!!! startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE); } } } </code></pre> <p>But when I put it into normal activity that generated by new project, it won't tall any error. log infos:</p> <pre><code>E/AndroidRuntime(22769): java.lang.NullPointerException E/AndroidRuntime(22769): at android.app.Activity.startActivityForResult(Activity.java:2827) E/AndroidRuntime(22769): at panda.com.db.VoiceAssistants$VoiceActivityHelper.startVoiceRecognitionActivity(VoiceAssistants.java:56) E/AndroidRuntime(22769): at panda.com.db.VoiceAssistants$VoiceActivityHelper.access$1(VoiceAssistants.java:47) E/AndroidRuntime(22769): at panda.com.db.VoiceAssistants.starVoiceAssistants(VoiceAssistants.java:24) </code></pre> <p>plz help, thank you!!</p>
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    1. PO
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    1. USpanda
    1. USpanda
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      1. VTUpMod
    1. COYou can't work with activity like this: voiceAssistants = new VoiceActivityHelper();
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      1. POstart activity for result gets null pointer exception
      1. USVyacheslav Shylkin
    2. COCan you post the full code of `startVoiceRecognitionActivity`?
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      1. POstart activity for result gets null pointer exception
      1. USMByD
    3. COCan you show us what `RecognizerIntent.ACTION_RECOGNIZE_SPEECH` is? Also make sure that you have that activity class properly defined in your android manifest?
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      1. POstart activity for result gets null pointer exception
      1. USwnafee
 

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