一些常用的代码块。后期会慢慢更新

<span style="font-size:18px;">/* 1.
 * 从流中解析新闻集合
 * 使用pull解析器解析xml数据
*/
	private static List<NewInfo> getNewListFromInputStream(InputStream is) throws Exception {
	
		XmlPullParser parser = Xml.newPullParser();
		parser.setInput(is, "utf-8");
		int eventType = parser.getEventType();
		
		List<NewInfo>  newInfoList = null;
		NewInfo newInfo = null;
		while(eventType != XmlPullParser.END_DOCUMENT ){
		
			String tagNme = parser.getName();//节点名称
			switch (eventType) {
			case XmlPullParser.START_TAG://<news>
				if("news".endsWith(tagNme)){
					newInfoList = new ArrayList<NewInfo>();
				}else if ("new".equals(tagNme)){
					newInfo = new NewInfo();
				}else if ("title".equals(tagNme)) {
					newInfo.setTitle(parser.nextText());
				}else if ("detail".equals(tagNme)) {
					newInfo.setDetail(parser.nextText());
				}else if ("comment".equals(tagNme)) {
					newInfo.setComment(Integer.valueOf(parser.nextText()));
				}else if ("image".equals(tagNme)) {
					newInfo.setImageUrl(parser.nextText());
				}
					break;
			case XmlPullParser.END_TAG:
				if("new".equals(tagNme)){
					newInfoList.add(newInfo);
					
				}
				break;	
				
			default:
				break;
			}
			eventType = parser.next();
		}
		
		return newInfoList;
	
	
  }
  
2.从输入流中读取数据（可转换为字符串）

// 将流转换成字符串
	private static String getStringInputStream(InputStream is)
			throws IOException {

		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		byte[] buffer = new byte[1024];
		int len = -1;
		while ((len = is.read(buffer)) != -1) {
			bos.write(buffer, 0, len);
		}
		/*is.close();
		return 	bos.toByteArray();  //从流中读出数据返回出去
		*/
		
		is.close();
		// String html = bos.toString();//把流中数据转换成字符串 采用的是UTF-8
		String html = new String(bos.toByteArray(), "GBK");// 在客户端更改，接收GBK编码格式，转换成字符串
		bos.close();
		return html;

	}
  （读一串字符串，一串！用字符流比较方便。。字节流向字符流的转换。
FileInputStream fis = new FileInputStream(path)1.先定义一个字符流对象。
BufferedReader reader = new BufferedReader();()里面接收的是一个reader的对象，就是那个转换流
BufferedReader reader = new BufferedReader(new InputStreamReader(fis));
  
3.//根据路径得到image图片(Bitmap) 加载网络图片


 public static Bitmap getImage(String path){
	 
	 HttpURLConnection conn = null;
	 Bitmap bitmap = null;
	 try {
		URL url = new URL(path);
		HttpURLConnection  httpconn  = (HttpURLConnection) url.openConnection();
		httpconn.connect();
		
		InputStream is =	httpconn.getInputStream();
		bitmap  = 	BitmapFactory.decodeStream(is);
		is.close();
		httpconn.disconnect();
	} catch (Exception e) {
		
		e.printStackTrace();
	}
 
	return bitmap;
	 
 }
  
------------------------------------------------------------------------
	protected void saveBitmapToSD(Bitmap bt) {
		String path = Environment.getExternalStorageDirectory();
		File file = new File(path, System.currentTimeMillis()+".jpg");
		System.out.println(Environment.getExternalStorageState()+"/Cool/"+"000000000000000000000000000");
		try {
			out = new FileOutputStream(file);
			bt.compress(Bitmap.CompressFormat.JPEG, 90, out);
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
		try {
			out.flush();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}   
  
  
  </span>