我解析的JSON数据不能显示到listView上!!

qq_35176140 2016-05-31 02:21:05 






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package com.example.peterliqi.moneyc;



import android.app.Activity;

import android.app.DatePickerDialog;

import android.app.Dialog;

import android.app.TimePickerDialog;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.view.View;

import android.widget.AdapterView;

import android.widget.Button;

import android.widget.DatePicker;

import android.widget.EditText;

import android.widget.ListView;

import android.widget.Spinner;

import android.widget.TextView;

import android.widget.TimePicker;

import android.widget.Toast;



import com.example.peterliqi.moneyc.LEI.SearchService;



import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;



import java.util.ArrayList;

import java.util.Calendar;

import java.util.HashMap;



/**

 * Created by Peterliqi on 5/16/2016.

 */

public class SearchActivity extends Activity {





    StringBuilder str = new StringBuilder("");

    StringBuilder sts = new StringBuilder("");



    private Button submit;

    private Button backcheck;

    private EditText sn1;

    private EditText owner1;

    private TextView tld;



    private EditText dayFrom1;

    private TextView tk1;

    private ListView lv;

    private EditText show;

    private EditText show1;

    private ArrayList<HashMap<String, Object>> listData;













    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_sarch);



        sn1 = (EditText) findViewById(R.id.csn);

        owner1 = (EditText) findViewById(R.id.cowner);

         lv = (ListView) findViewById(R.id.listview);







        //ListView 的数据来源于数据适配器







        Button dateBn = (Button) findViewById(R.id.dateBn);

        Button dateBn1 = (Button) findViewById(R.id.dateBn1);

        backcheck = (Button) findViewById(R.id.backcheck);

        tk1=(TextView) findViewById(R.id.tk);



        Spinner spinner = (Spinner) findViewById(R.id.spinner2);



        spinner.getSelectedItem();

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

            @Override

            public void onItemSelected(AdapterView<?> parent, View view,

                                       int pos, long id) {



                // String[] languages = getResources().getStringArray(R.array.ctype);

                String TP = parent.getItemAtPosition(pos).toString();

                tk1.setText(TP);



            }

            @Override

            public void onNothingSelected(AdapterView<?> parent) {

                // Another interface callback

            }

        });

}













    public void backccc(View view) {



        final String sn = sn1.getText().toString().trim();

        final String owner = owner1.getText().toString().trim();

        final String SNStatus = tk1.getText().toString().trim();

        final String dayFrom = show.getText().toString().trim();

        final String dayTo = show1.getText().toString().trim();

        new Thread(){

            public void run(){



                final String fanhui= SearchService.Searchservice(sn,owner,SNStatus,dayFrom,dayTo);

                if (fanhui!=null){

                    runOnUiThread(new Runnable() {

                        @Override

                        public void run() {





                            try {

                                JSONObject jsonObjs = new JSONObject(fanhui);



                                JSONArray jsonObja=jsonObjs.getJSONArray("data");

                                listData = new ArrayList<HashMap<String, Object>>();

                                for (int i = 0;i<jsonObja.length();i++) {



                                    JSONObject jsonObj=jsonObja.getJSONObject(i);

                                    HashMap<String, Object> map = new HashMap<String, Object>();

                                    map.put("id",jsonObj.getInt("id"));

                                    map.put("userName",jsonObj.getString("userName"));

                                    map.put("SN",jsonObj.getString("SN"));

                                    map.put("checkin_reason",jsonObj.getString("checkin_reason"));

                                    map.put("station",jsonObj.getString("station"));

                                    map.put("BU",jsonObj.getString("BU"));

                                    map.put("agingDay",jsonObj.getString("agingDay"));

                                    map.put("checkinDate",jsonObj.getString("checkinDate"));

                                    map.put("checkoutDate",jsonObj.getString("checkoutDate"));;

                                    map.put("SNStatus",jsonObj.getString("SNStatus"));

                                    map.put("owner",jsonObj.getString("owner"));

                                    map.put("createDate",jsonObj.getString("createDate"));

                                    map.put("checkinTimes",jsonObj.getString("checkinTimes"));

                                    listData.add(map);



                                }

                                



                            } catch (JSONException e1) {

                                throw  new RuntimeException(e1);

                            }

                            Message msg = new Message();

                            msg.what = 0;

                            handler.sendMessage(msg);





                        }



                    });

                }

                else {

                    Message msg = new Message();

                    msg.what = 1;

                    handler.sendMessage(msg);





                }





            }





        }.start();





    }





    public Handler handler= new Handler(){

        @Override

        public void handleMessage(Message msg) {

            // TODO Auto-generated method stub

            try {

                switch(msg.what)

                {

                    case 0:

                        MylvAdapter lvAdapter = new MylvAdapter(SearchActivity.this, listData);

                        lv.setAdapter(lvAdapter);

                        break;

                    case 1:

                        Toast.makeText(SearchActivity.this, "<JSON>", Toast.LENGTH_SHORT).show();

                        System.out.println("<JSON>");

                        break;

                    default:

                        break;

                }

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

            super.handleMessage(msg);

        }

    };

}




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jklwan 2016-05-31
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在getview方法中，修改代码如下。 

ViewHolder viewHolder = null;
        if (convertView == null){
            convertView = inflater.inflate(R.layout.list_item,null);
           viewHolder = new ViewHolder();
            viewHolder.tv1=(TextView)convertView.findViewById(R.id.userming);
             viewHolder.tv2=(TextView)convertView.findViewById(R.id.xvliehao);
             viewHolder.tv3=(TextView)convertView.findViewById(R.id.cheliyou);
            viewHolder.tv4=(TextView)convertView.findViewById(R.id.gongzhan);
            viewHolder.tv5=(TextView)convertView.findViewById(R.id.bumen);
            viewHolder.tv6=(TextView)convertView.findViewById(R.id.xianggerizi);
            viewHolder.tv7=(TextView)convertView.findViewById(R.id.chekinshij);
            viewHolder.tv8=(TextView)convertView.findViewById(R.id.outtime);
            viewHolder.tv9=(TextView)convertView.findViewById(R.id.zhuangtai);
            viewHolder.tv10=(TextView)convertView.findViewById(R.id.owneraa);
            viewHolder.tv11=(TextView)convertView.findViewById(R.id.creashijian);
            viewHolder.tv12=(TextView)convertView.findViewById(R.id.cishu);
            convertView.setTag(viewHolder);
        }
        else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
你定义了viewholder，却没有初始化，也没有使用
qq_35176140 2016-05-31
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{"data":[{"id":75,"userName":"f1321801","SN":"ggg","checkin_reason":"Failure analysis","station":"SMT","BU":"SRGBU","agingDay":12,"checkinDate":"2016-05-19 02:02:58","checkoutDate":"","SNStatus":"check in","owner":"gggg","createDate":"2016-05-19 02:02:58","checkinTimes":1},{"id":80,"userName":"f1321801","SN":"dfsgh","checkin_reason":"Failure analysis","station":"SMT","BU":"SRGBU","agingDay":"","checkinDate":"2016-05-31 06:29:22","checkoutDate":"2016-05-31 06:29:24","SNStatus":"check out","owner":"gggg","createDate":"2016-05-31 06:29:22","checkinTimes":1}]} 有时候查询的时候是几十笔数据。 大概就是这种格式的。。。 我是自学的。。搞了很多天没弄明白。。也没人教。。求帮忙。。 谢谢
qq_35176140 2016-05-31
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这是ListView的样式。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/userming"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/xvliehao"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/cheliyou"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/gongzhan"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bumen"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/xianggerizi"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/chekinshij"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/outtime"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/zhuangtai"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/owneraa"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/creashijian"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/cishu"
        android:singleLine="true"
        android:ellipsize="end"
        android:text="."
        android:textColor="#000000"
        />
    
    

</LinearLayout>
qq_35176140 2016-05-31
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这是MylvAdapter

package com.example.peterliqi.moneyc;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;

/**
 * Created by Peterliqi on 5/31/2016.
 */
public class MylvAdapter extends BaseAdapter {
    private LayoutInflater inflater;
    static ArrayList<HashMap<String, Object>> listData;

    public MylvAdapter(SearchActivity context, ArrayList<HashMap<String, Object>> listData) {
        super();
        this.inflater= LayoutInflater.from(context);
        this.listData = listData;

    }


    @Override
    public int getCount() {
        return listData.size();
    }

    @Override
    public Object getItem(int position) {
        return listData.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }
    class ViewHolder{

        TextView tv1,tv2,tv3,tv4,tv5,tv6,tv7,tv8,tv9,tv10,tv11,tv12;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder = null;

        if (convertView == null){


            convertView = inflater.inflate(R.layout.list_item,null);
            TextView tv1=(TextView)convertView.findViewById(R.id.userming);
            TextView tv2=(TextView)convertView.findViewById(R.id.xvliehao);
            TextView tv3=(TextView)convertView.findViewById(R.id.cheliyou);
            TextView tv4=(TextView)convertView.findViewById(R.id.gongzhan);
            TextView tv5=(TextView)convertView.findViewById(R.id.bumen);
            TextView tv6=(TextView)convertView.findViewById(R.id.xianggerizi);
            TextView tv7=(TextView)convertView.findViewById(R.id.chekinshij);
            TextView tv8=(TextView)convertView.findViewById(R.id.outtime);
            TextView tv9=(TextView)convertView.findViewById(R.id.zhuangtai);
            TextView tv10=(TextView)convertView.findViewById(R.id.owneraa);
            TextView tv11=(TextView)convertView.findViewById(R.id.creashijian);
            TextView tv12=(TextView)convertView.findViewById(R.id.cishu);
            convertView.setTag(viewHolder);
        }
        else {
            viewHolder = (ViewHolder) convertView.getTag();
        }


    try {
        String userST=listData.get(position).get("userName").toString();
        String snST=listData.get(position).get("SN").toString();
        String checkin_reasonST=listData.get(position).get("checkin_reason").toString();
        String stationST=listData.get(position).get("station").toString();
        String buST=listData.get(position).get("BU").toString();
        String agingDayST=listData.get(position).get("agingDay").toString();
        String checkinDateST=listData.get(position).get("checkinDate").toString();
        String checkoutDateST=listData.get(position).get("checkoutDate").toString();
        String SNSST=listData.get(position).get("SNStatus").toString();
        String ownST=listData.get(position).get("owner").toString();
        String creatST=listData.get(position).get("createDate").toString();
        String checkinST=listData.get(position).get("checkinTimes").toString();


        viewHolder.tv1.setText(userST);
        viewHolder.tv2.setText(snST);
        viewHolder.tv3.setText(checkin_reasonST);
        viewHolder.tv4.setText(stationST);
        viewHolder.tv5.setText(buST);
        viewHolder.tv6.setText(agingDayST);
        viewHolder.tv7.setText(checkinDateST);
        viewHolder.tv8.setText(checkoutDateST);
        viewHolder.tv9.setText(SNSST);
        viewHolder.tv10.setText(ownST);
        viewHolder.tv11.setText(creatST);
        viewHolder.tv12.setText(checkinST);

    }catch (Exception e){
        e.printStackTrace();
    }





        return convertView;
    }
}
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