用Gson来解析数据

1.

数据源

首先是导入Google的Gson包

{
"resultcode":"200",/*返回标识码*/
"reason":"查询成功!",
"result":{
    "company":"顺丰",
    "com":"sf",
    "no":"575677355677",
    "list":[
        {
        "datetime":"2013-06-25 10:44:05",    /*时间*/
        "remark":"已收件",                    /*描述*/
        "zone":"台州市"                        /*区域*/
        },
        {
        "datetime":"2013-06-25 11:05:21",
        "remark":"快件在 台州 ,准备送往下一站 台州集散中心 ",
        "zone":"台州市"
        },
        {
        "datetime":"2013-06-25 20:36:02",
        "remark":"快件在 台州集散中心 ,准备送往下一站 台州集散中心 ",
        "zone":"台州市"
        },
        {
        "datetime":"2013-06-25 21:17:36",
        "remark":"快件在 台州集散中心 ,准备送往下一站 杭州集散中心 ",
        "zone":"台州市"
        },
        {
        "datetime":"2013-06-26 12:20:00",
        "remark":"快件在 杭州集散中心 ,准备送往下一站 西安集散中心 ",
        "zone":"杭州市"
        },
        {
        "datetime":"2013-06-27 05:48:42",
        "remark":"快件在 西安集散中心 ,准备送往下一站 西安 ",
        "zone":"西安市/咸阳市"
        },
        {
        "datetime":"2013-06-27 08:03:03",
        "remark":"正在派件..",
        "zone":"西安市/咸阳市"
        },
        {
        "datetime":"2013-06-27 08:51:33",
        "remark":"派件已签收",
        "zone":"西安市/咸阳市"
        },
        {
        "datetime":"2013-06-27 08:51",
        "remark":"签收人是：已签收 ",
        "zone":"西安市/咸阳市"
        }
        ],
        "status": "1" /*0或1，1表示签收或退回*/
    }
}

 

package com.bwf.gson_0;

import java.util.List;

public class KuaiDi {
    int resultcode;
    String reason;
    Result result;
    
    public static class Result{
        String company;
        String com;
        long no;
        List<Details> list;
        int status;
        
        public static class Details{
            String datetime;
            String remark;
            String zone;
        }
    }
    
    
}

package com.bwf.gson_0;

import java.io.InputStream;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

import com.bwf.gson_0.KuaiDi.Result.Details;
import com.google.gson.Gson;

public class MainActivity extends Activity {
    TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv = (TextView) findViewById(R.id.tv);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.action_settings:
            try {
                InputStream in = getAssets().open("kuaidi.txt");
                byte[] buffer = new byte[1024 * 20];
                int num = in.read(buffer);
                String str = new String(buffer, 0, num);

                // 解析
                Gson gson = new Gson();
                KuaiDi k = gson.fromJson(str, KuaiDi.class);
                // 展示
                showResult(k);
            } catch (Exception e) {
                Log.d("fanhy", "异常:" + e.toString());
            }

            break;

        default:
            break;
        }
        return super.onOptionsItemSelected(item);
    }

    private void showResult(KuaiDi k) {
        tv.append(k.resultcode + "\n" + k.reason + "\n\n");
        KuaiDi.Result result = k.result;
        tv.append(result.com + "\n" + result.company + "\n" + result.no
                + "\n" + result.status+"\n\n");
        List<KuaiDi.Result.Details> details = result.list;
        for (Details details2 : details) {
            tv.append(details2.datetime + "\n" + details2.remark + "\n"
                    + details2.zone+"\n\n");
        }
    }
}