Android-----Resources

　　　　 //Call getDrawable to get the image
        Drawable d = getResources().getDrawable(R.drawable.sample_image);
        //You can use the drawable then to set the background
        this.getTextView().setBackgroundDrawable(d);      
        //or you can set the background directly from the Resource Id
        this.getTextView().setBackgroundResource(R.drawable.sample_image);

Resources res = this.mContext.getResources();
int mainBackGroundColor =  res.getColor(R.color.main_back_ground_color);
reportString("mainBackGroundColor:" + mainBackGroundColor);

　　　　 StringBuffer sb = new StringBuffer();
        Resources res = activity.getResources();
        XmlResourceParser xpp = res.getXml(R.xml.test);

        xpp.next();
        int eventType = xpp.getEventType();
        while (eventType != XmlPullParser.END_DOCUMENT) {
            if(eventType == XmlPullParser.START_DOCUMENT) {
                sb.append("******Start document");
            } 
            else if(eventType == XmlPullParser.START_TAG) {
                sb.append("\nStart tag "+xpp.getName());
            } 
            else if(eventType == XmlPullParser.END_TAG) {
                sb.append("\nEnd tag "+xpp.getName());
            } 
            else if(eventType == XmlPullParser.TEXT) {
                sb.append("\nText "+xpp.getText());
            }
            eventType = xpp.next();
        }//eof-while
        sb.append("\n******End document");
        return sb.toString();

　　　　 Resources r = activity.getResources();
        InputStream is = r.openRawResource(R.raw.test);
        String myText = convertStreamToString(is);
        is.close();
        return myText;

　　　　 ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int i = is.read();
        while (i != -1){
            baos.write(i);
            i = is.read();
        }
        return baos.toString();

　　    AssetManager am = activity.getAssets();
        InputStream is = am.open("test.txt");
        String s = convertStreamToString(is);
        is.close();
        return s;