用json获取服务器端的数据
输出示例：{}表示是object对象，[]表示是一个数组，{}里面的是一个个的属性
{"pagination":{ "countPage":4, "from":15," nowPage":4, "rows": [ {"id":33,"image":"Koala.jpg","name":"ppp"}, {"id":34,"image":"Lighthouse.jpg","name":"1123"}, {"id":35,"image":"Tulips.jpg","name":"3234"},],"size":5,"total":19}
}
test方法获得pagination中的数据：
package com.example.jd.test;
import org.apache.http.Header;
import org.json.JSONArray;
import org.json.JSONObject;
import android.os.Handler;
import android.os.Message;
import android.test.AndroidTestCase;
import com.example.jd.util.HttpUrl;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.JsonHttpResponseHandler;
public class CategoryTest extends AndroidTestCase {
private static final int QUERY = 0;
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case QUERY:
// 创建异步请求的客户端对象
AsyncHttpClient client = new AsyncHttpClient();
// 发送请求 //classifyQuery是封装好的路径名称 /**
* 商品分类查询
*/
//public static final String classifyQuery = "http://172.16.237.168:8080/jds/csdn/classifyAction_query.action"; //则null是params
client.post(HttpUrl.classifyQuery, null,
new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode,
Header[] headers, JSONObject response) {
super.onSuccess(statusCode, headers, response);
try { //获得pagination JSONObject pagination = response
.getJSONObject("pagination");
//
pagination.getInt("size")是其中一个属性
System.out.println(pagination
.getInt("size"));
//rows后面是[],说明是一个json数组
JSONArray rows = pagination
.getJSONArray("rows");
//遍历数组，各属性的类型看说明书
for (int i = 0; i < rows.length(); i++) {
JSONObject obj = rows.getJSONObject(i);
System.out.println(obj.getInt("id")+","+obj.getString("name")+","+obj.getString("image"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Throwable e,
JSONObject errorResponse) {
System.out
.println("------------------onFailure----------------------");
super.onFailure(statusCode, e, errorResponse);
}
});
break;
default:
break;
}
}
};
//实现
public void queryCategory() {
Message msg = new Message();
msg.what = QUERY;
handler.sendMessage(msg);
}
}