PackageManager pm = getPackageManager();
        List<ResolveInfo> activities = pm.queryIntentActivities(
                new Intent(RecognizerIntent.ACTION_WEB_SEARCH), 0);  //网络识别程序        if (activities.size() != 0) 
        {
            speakButton.setOnClickListener(this);
        }
        else 
        { 
            ////将扭铵置灰
            speakButton.setEnabled(false);
            speakButton.setText("Recognizer not present");
        }
现在检测不到组件(或包)安装在本机上, 根据上以信息,应安装什么包呢?