1、WebServices的返回结果
2、ListView内容布局代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorWhite"
>
<ImageView
android:id="@+id/app_icon"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_centerVertical="true"
android:layout_marginLeft="5dp"
android:layout_marginTop="5dp"
android:src="@mipmap/ic_launcher_round1" />
<TextView
android:id="@+id/customitem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/app_icon"
android:gravity="center"
android:paddingLeft="20dp"
android:text="app name"
android:textSize="20sp"
android:textColor="@color/colorPrimaryDark"
android:layout_marginTop="5dp"/>
<TextView
android:id="@+id/customdesc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/customitem"
android:layout_toRightOf="@id/app_icon"
android:gravity="center"
android:paddingLeft="20dp"
android:singleLine="true"
android:text="app describe"
android:textSize="14sp"
android:textColor="@color/colorPrimaryDark"
android:layout_marginBottom="5dp"/>
</RelativeLayout>
3、Adapter的代码
1 import android.content.Context;
2 import android.view.LayoutInflater;
3 import android.view.View;
4 import android.view.ViewGroup;
5 import android.widget.BaseAdapter;
6 import android.widget.ImageView;
7 import android.widget.TextView;
8
9 import java.util.List;
10 import java.util.Map;
11
12 public class MyCustomAdapter extends BaseAdapter {
13 private Context context;
14 private List<Map<String,Object>> list;
15 private LayoutInflater inflater;
16 public MyCustomAdapter(List<Map<String,Object>> list, Context context)
17 {
18 this.context=context;
19 this.list=list;
20 inflater=LayoutInflater.from(context);
21 }
22 @Override
23 public int getCount() {
24 return list==null?0:list.size();
25 }
26
27 @Override
28 public Object getItem(int position) {
29 return position;
30 }
31
32 @Override
33 public long getItemId(int position) {
34 return position;
35 }
36 class ViewHolder{
37 public ImageView imageView;
38 public TextView appText;
39 public TextView descText;
40 }
41
42 @Override
43 public View getView(int position, View convertView, ViewGroup parent) {
44 ViewHolder holder =null;
45 if (holder == null){
46 holder=new ViewHolder();
47 if(convertView ==null){
48 convertView=inflater.inflate(R.layout.drawelist,null);
49 holder.imageView = (ImageView) convertView.findViewById(R.id.app_icon);
50 holder.appText = (TextView) convertView.findViewById(R.id.customitem);
51 holder.descText = (TextView) convertView.findViewById(R.id.customdesc);
52 convertView.setTag(holder);
53 }else {
54 //根据Tag获取已经存在的ViewHolder
55 holder = (ViewHolder) convertView.getTag();
56 }
57 //设置显示内容
58 holder.appText.setText(list.get(position).get("name").toString());
59 holder.descText.setText(list.get(position).get("desc").toString());
60 holder.imageView.setBackgroundResource((Integer)list.get(position).get("image"));
61 }
62
63 return convertView;
64 }
65
66
67 }
4、访问WEB代码
1 public static List<EmpInfo> GetEmpInfo(String PageNum, String PageSize, String strwhere) {
2
3
4 List<EmpInfo> listEmpinfo = new ArrayList<>();
5 InputStreamReader in = null;
6 try {
7 final String SERVER_URL = GlobalAppliaction.WebUrl + "GetEmpList";
8 HttpPost request = new HttpPost(SERVER_URL); // 根据内容来源地址创建一个Http请求
9 List params = new ArrayList();
10 params.add(new BasicNameValuePair("PageNum", PageNum)); // 添加必须的参数
11 params.add(new BasicNameValuePair("PageSize", PageSize)); // 添加必须的参数
12 params.add(new BasicNameValuePair("strwhere", strwhere)); // 添加必须的参数
13 request.setEntity(new UrlEncodedFormEntity(params, org.apache.http.protocol.HTTP.UTF_8)); // 设置参数的编码
14 HttpResponse httpResponse = new DefaultHttpClient().execute(request); // 发送请求并获取反馈
15
16 // 解析返回的内容
17 if (httpResponse.getStatusLine().getStatusCode() != 404) {
18 InputStream inputStream = httpResponse.getEntity().getContent();
19 in = new InputStreamReader(inputStream);
20 BufferedReader bufferedReader = new BufferedReader(in);
21
22 StringBuffer strBuffer = new StringBuffer();
23 String line = null;
24 while ((line = bufferedReader.readLine()) != null) {
25 strBuffer.append(line);
26 }
27 inputStream.close();
28 bufferedReader.close();
29 String result = strBuffer.toString();
30
31
32 String errCode = "";
33
34 String strresult = "";
35 JSONObject root = new JSONObject(result);
36
37 errCode = root.getString("Code");
38 if (errCode.equals("1")) {
39 strresult = root.getString("Result");
40
41
42 JSONArray array = root.getJSONArray("Result");//解析result
43 Gson gson = new Gson();
44 listEmpinfo = gson.fromJson(strresult, new TypeToken<List<EmpInfo>>() {
45 }.getType());
46
47
48
49 }
50
51 return listEmpinfo;
52
53
54 }
55
56
57 } catch (IOException e) {
58 e.printStackTrace();
59 Log.d("debug", e.toString());
60 return null;
61 } catch (JSONException e) {
62 e.printStackTrace();
63 return null;
64 } finally {
65
66 if (in != null) {
67 try {
68 in.close();
69 } catch (IOException e) {
70 e.printStackTrace();
71 }
72 }
73 }
74 return listEmpinfo;
75 }
5、UI展示获取结果
//启动后台任务
GetWebResultTask queryAddressTask = new GetWebResultTask();
//分页显示
queryAddressTask.execute("1", "10", "");
ArrayList<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Map<String, Object> map;
public class GetWebResultTask extends AsyncTask<String, Integer, List<EmpInfo>> {
@Override
protected List<EmpInfo> doInBackground(String... params) {
List<EmpInfo> GetResult = null;
try {
GetResult = WebByHttp.GetEmpInfo(params[0], params[1], params[2]);
} catch (Exception e) {
e.printStackTrace();
}
//将结果返回给onPostExecute方法
return GetResult;
}
//此方法可以在主线程改变UI
protected void onPostExecute(List<EmpInfo> result) {
try {
for (int ii = 0; ii < result.size(); ii++) {
map = new HashMap<String, Object>();
map.put("image", R.drawable.ic_launcher_background);
map.put("name", result.get(ii).EmpName);
map.put("desc", result.get(ii).CreateTime);
list.add(map);
}
myCustomAdapter = new MyCustomAdapter(list, getActivity());
listviewemp.setAdapter(myCustomAdapter);
listviewemp.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getActivity(), list.get(position).get("name").toString(), Toast.LENGTH_LONG).show();
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
6、界面效果
原文地址：https://www.cnblogs.com/lzsin/p/10632994.html
时间： 2024-10-07 23:06:21