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List<ResolveInfo> availableRecognitionServices =    mFragment.getPackageManager().queryIntentServices(
                        new Intent(RecognitionService.SERVICE_INTERFACE),    PackageManager.GET_META_DATA );
        int numAvailable = availableRecognitionServices.size();
        if (numAvailable == 0) {
            mVoiceCategory.removePreference(mRecognizerPref);
            mVoiceCategory.removePreference(mRecognizerSettingsPref);
            return false;
        }

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