How to implement recognizer on Android

Question

My software architecture as below:
TabActivity is a TabHost Activity.
It contain 2 ActivityGroup: AGroup and BGroup.
AGroup contain 2 Activities: A1Activity and A2Activity.

I want to implement recognizer in A1Activity.
My code as below:

    private static final int VOICE_RECOGNIZER_REQUEST_CODE = 0x1008;
public void Recognizera() {
        PackageManager pm = getPackageManager();
        List<ResolveInfo> activities = pm.queryIntentActivities(new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);

        if(activities.size() != 0) {
            try {   
                Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
                intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "語音辨識");
                startActivityForResult(intent, VOICE_RECOGNIZER_REQUEST_CODE);
            }
            catch(Exception e) {
                e.printStackTrace();
            }
        }
}
@Override
protected void onActivityResult(int RequestCode, int ResultCode, Intent data) {
    switch(RequestCode) {
    case VOICE_RECOGNIZER_REQUEST_CODE:
        if(RequestCode == VOICE_RECOGNIZER_REQUEST_CODE && ResultCode == RESULT_OK) {
            ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);

            for(int i = 0; i < results.size(); i++) {
                System.out.println("results " + results.get(i));
            }
        }
        break;
    }
    super.onActivityResult(RequestCode, ResultCode, data);
}

But it show "Unknown problem" as the picture below URL.

But without any error message in logcat.
How to modify it?

Answer 1

This happens because an error was encountered during the voice recognition. The ResultCode parameter will be the error code, one of the errors here. First find what is that error, so you can investigate it further.