XUtils之HttpUtils

来源：互联网发布：windows api编程编辑：程序博客网时间：2024/06/05 02:31
HttpUtils请求网络数据

import java.util.List;import com.example.week1_httputils.Car.Carmsg;import com.google.gson.Gson;import com.lidroid.xutils.HttpUtils;import com.lidroid.xutils.exception.HttpException;import com.lidroid.xutils.http.ResponseInfo;import com.lidroid.xutils.http.callback.RequestCallBack;import com.lidroid.xutils.http.client.HttpRequest.HttpMethod;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.widget.ArrayAdapter;import android.widget.ListView;public class MainActivity extends Activity {    private ListView lv;    private String url = "http://172.17.29.120/localuser/lujunfang/hello/xiangmuyi_20161008_test1.json";    Handler handler = new Handler() {        public void handleMessage(android.os.Message msg) {            if (msg.what == 1) {                String json = (String) msg.obj;                Car car = new Gson().fromJson(json, Car.class);                List<Carmsg> list = car.list;                lv.setAdapter(new ArrayAdapter<Carmsg>(MainActivity.this,                        android.R.layout.simple_list_item_1, list));            }        };    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv = (ListView) findViewById(R.id.lv);        // 获得HttpUtils        HttpUtils httpUtils = new HttpUtils();        //设置响应结果的编码集格式        httpUtils.configResponseTextCharset("utf-8");        // 调用send方法 参数一:请求的方式;        // 参数二:网址url;参数三:抽象类RequestCallBack<T>,泛型是需要的返回值类型(json--String,图片--Bitmap)        // HttpUtils.send(HttpMethod method, String url, RequestCallBack<T> callBack)        httpUtils.send(HttpMethod.GET, url, new RequestCallBack<String>() {      //如果一致不走onsuccess,那就在onfailure中找原因;还要看看error;-----------------------            @Override//请求开始        public void onStart() {            super.onStart();        }            @Override//请求中            public void onLoading(long total, long current, boolean isUploading) {                super.onLoading(total, current, isUploading);            }            @Override            // 请求失败---查询数据库            public void onFailure(HttpException arg0, String arg1) {                 System.out.println(arg0.toString()+"\n"+arg1);            }            @Override            // 请求成功---获取数据            public void onSuccess(ResponseInfo<String> arg0) {                String json = arg0.result;// .result 的返回值类型与RequestCallBack<T>的泛型一致                // --------------高大上----------------                handler.obtainMessage(1, json).sendToTarget();            }        });    }}
0 0