• 综合案例
  • 案例设计到知识点:listview —>baseAdapter tomcat xml(xml解析) url httpurlconnection 开线程 handler 
  • 案例开发的流程 
  • 开发这样一个程序 最少3个人 一个android客户端,一个UI设计师,做服务器开发人员. 产品经理(微信). 
  • 代码实现过程: 
  • 画UI

• • 搭建服务器 去服务器取数据

private void initData() {        new Thread(new Runnable() {            @Override            public void run() {                try {                    String path = "http://47.105.71.243:8080/resource/news.xml";                    URL url = new URL(path);                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();                    int code = conn.getResponseCode();                    if (code == 200) {                        InputStream is = conn.getInputStream();                        mList = NewsXmlUtils.pasreXml(is);                        Log.d(TAG, "run: " + mList.size());                        if (myAdapter!=null){                            myAdapter.notifyDataSetChanged();                        }else{                            myAdapter = new myAdapter();                            mLv.setAdapter(myAdapter);                        }                    }                } catch (Exception e) {                    e.printStackTrace();                }            }        }).start();    }

• • 对数据进行解析 xml解析

public static List
     
       pasreXml(InputStream in) {        List
      
        lists = null;        News news = null;        XmlPullParser parser = Xml.newPullParser();        try {            parser.setInput(in, "utf-8");            int eventType = parser.getEventType();            while (eventType != XmlPullParser.END_DOCUMENT) {                switch (eventType) {                    case XmlPullParser.START_TAG:                        if ("channel".equals(parser.getName())) {                            lists = new ArrayList
       
        ();                        } else if ("item".equals(parser.getName())) {                            news = new News();                        } else if ("title".equals(parser.getName())) {                            news.setTitle(parser.nextText());                        } else if ("description".equals(parser.getName())) {                            news.setDescription(parser.nextText());                        } else if ("image".equals(parser.getName())) {                            news.setImagepath(parser.nextText());                        } else if ("type".equals(parser.getName())) {                            news.setType(parser.nextText());                        } else if ("comment".equals(parser.getName())) {                            news.setComment(parser.nextText());                        }                        break;                    case XmlPullParser.END_TAG:                        if ("item".equals(parser.getName())) {                            lists.add(news);                        }                        break;                }                eventType = parser.next();            }            return lists;        } catch (Exception e) {            e.printStackTrace();            return null;        }    }
       
      
     

 

• • 定义数据适配器

class myAdapter extends BaseAdapter {        @Override        public int getCount() {            if (mList == null) {                return 0;            }            return mList.size();        }        @Override        public Object getItem(int position) {            return null;        }        @Override        public long getItemId(int position) {            return 0;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = View.inflate(MainActivity.this, R.layout.item, null);            }            News news = mList.get(position);            SmartImageView iv = convertView.findViewById(R.id.iv);            TextView tv = convertView.findViewById(R.id.tv);            TextView tvs = convertView.findViewById(R.id.tvs);            String imagepath = news.getImagepath();            Log.d(TAG, "getView: " + imagepath);            iv.setImageUrl(imagepath);            tv.setText(news.getTitle());            tvs.setText(news.getDescription());            return convertView;        }    }

 

• • smartImageview 
    • 要先声明 要求这个类的完整包名和类名

 

• • • 找的控件 展示数据

SmartImageView iv = convertView.findViewById(R.id.iv);            iv.setImageUrl(imagepath);