Android开发-数组运用-List点击通过数组传递Key-AndroidStudio

来源：互联网发布：万磁王和x教授知乎编辑：程序博客网时间：2024/06/01 07:33

解析Json，并添加到List，如何在onClick的时候，把Json的某个key传递出去呢，我利用了数组。如果有更好的办法，请告诉我，谢谢！

/** * 数组 用于存放taskId * 数组赋值 taskIdArray[i] 在解析Json并list.add时赋值 * 数组取值 taskIdArray[position] 在onItemClick并data.setTaskId时取值 */String[] taskIdArray = new String[100];

/** * JSONArray * 解析Json中的标题 并设置到 list * 以下对应 http://125.208.12.227/appceshi/Api */try {   JSONArray jsonArray = new JSONArray(result.toString());   System.out.println("jsonArray.toString() = " + jsonArray.toString());   System.out.println("jsonArray.length() = " + jsonArray.length());   for(int i=0;i<jsonArray.length();i++)   {      JSONObject jsonObject = jsonArray.getJSONObject(i);      Log.e("TAG", jsonObject.getString("id"));      String taskId = jsonObject.getString("id");      Log.e("TAG", jsonObject.getString("renwu"));      String renwu = jsonObject.getString("renwu");      list.add("taskId =  " + taskId + " , renwu = " + renwu);      taskIdArray[i]=taskId;   }   taskAdapter = new TaskAdapter();   listViewTask.setAdapter(taskAdapter);} catch (JSONException e) {   e.printStackTrace();}

@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {   MyData data = new MyData();   data.setPosition(position);   data.setTaskId(taskIdArray[position]);   Intent intent = new Intent();   intent.putExtra(key, data);   //用于发送消息给Fragment two   getTargetFragment().onActivityResult(requestCode, Activity.RESULT_OK, intent);   mainActivity.showTwoFragment();}

这里是完整的OneFragment.java:

package com.iwanghang.fragmenttransactiondemo;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.support.v4.app.Fragment;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.util.ArrayList;import java.util.List;/** * 实现OnItemClickListener(Item点击事件监听),OnClickListener(按钮点击事件监听) */public class OneFragment extends Fragment implements OnItemClickListener {   /**    * item    */   private ListView listViewTask;   private List<String> list;   private LayoutInflater inflater;   private TaskAdapter taskAdapter;   /**    * MainActivity    */   private MainActivity mainActivity;   /**    * Json    */   private String title;   private Volley4Json volley4Json;   /**    * 传值    */   public static int requestCode = 0;   public static String key = "OneFragment.key";   /**    * 数组 用于存放taskId    * 数组赋值 taskIdArray[i] 在解析Json并list.add时赋值    * 数组取值 taskIdArray[position] 在onItemClick并data.setTaskId时取值    */   String[] taskIdArray = new String[100];   //onAttach(),当fragment被绑定到activity时被调用(Activity会被传入.).   @Override   public void onAttach(Context context) {      super.onAttach(context);      mainActivity = (MainActivity) context;   }   //onCreateView(),创建和fragment关联的view hierarchy时调用.   @Override   public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {      /**       * 实例化volley4Json       */      volley4Json = new Volley4Json(mainActivity);      /**       * UI组件初始化       */      View view = inflater.inflate(R.layout.fragment_one,null);      /**       * item初始化       */      listViewTask = (ListView) view.findViewById(R.id.listViewTask);      /**       * 解析Json       */      list = new ArrayList<String>();      volley4Json.getJsonResultTaskList(new Volley4Json.VolleyCallBack() {         @Override         /**          * JSONObject          */         //public void onSuccess(JSONObject result) {         /**          * JSONArray          */         public void onSuccess(JSONArray result) {            System.out.println(result.toString());            /**             * JSONObject             * 解析Json中的标题 并设置到 list             * 以下对应 http://api.zsreader.com/v2/pub/channel/list?&page=1&tp=1&size=20             *///          try {//             JSONArray jsonArray = result.getJSONArray("data");//             for (int i = 0; i < jsonArray.length(); i++) {//                JSONObject obj2 = jsonArray.getJSONObject(i);//                Log.e("TAG", obj2.getString("title"));//                title = obj2.getString("title");//                list.add(i + " . " + title);//             }//             taskAdapter = new TaskAdapter();//             listViewTask.setAdapter(taskAdapter);//          } catch (JSONException e) {//             e.printStackTrace();//          }            /**             * JSONArray             * 解析Json中的标题 并设置到 list             * 以下对应 http://125.208.12.227/appceshi/Api             */            try {               JSONArray jsonArray = new JSONArray(result.toString());               System.out.println("jsonArray.toString() = " + jsonArray.toString());               System.out.println("jsonArray.length() = " + jsonArray.length());               for(int i=0;i<jsonArray.length();i++)               {                  JSONObject jsonObject = jsonArray.getJSONObject(i);                  Log.e("TAG", jsonObject.getString("id"));                  String taskId = jsonObject.getString("id");                  Log.e("TAG", jsonObject.getString("renwu"));                  String renwu = jsonObject.getString("renwu");                  list.add("taskId =  " + taskId + " , renwu = " + renwu);                  taskIdArray[i]=taskId;               }               taskAdapter = new TaskAdapter();               listViewTask.setAdapter(taskAdapter);            } catch (JSONException e) {               e.printStackTrace();            }         }      });      /**       * Item点击事件监听       */      listViewTask.setOnItemClickListener(this);      return view;   }   @Override   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {      MyData data = new MyData();      data.setPosition(position);      data.setTaskId(taskIdArray[position]);      Intent intent = new Intent();      intent.putExtra(key, data);      //用于发送消息给Fragment two      getTargetFragment().onActivityResult(requestCode, Activity.RESULT_OK, intent);      mainActivity.showTwoFragment();   }   public class TaskAdapter extends BaseAdapter {      public TaskAdapter() {         super();         inflater = LayoutInflater.from(mainActivity);      }      @Override      public int getCount() {         return list.size();      }      @Override      public Object getItem(int position) {         return list.get(position);      }      @Override      public long getItemId(int position) {         return position;      }      @Override      public View getView(int position, View convertView, ViewGroup parent) {         View view = convertView;         if (view == null) {            view = inflater.inflate(R.layout.item_task_list, parent, false);            ViewHolder viewHolder = new ViewHolder();            viewHolder.content = (TextView) view.findViewById(R.id.textView_task);            view.setTag(viewHolder);         }         ViewHolder viewHolder = (ViewHolder) view.getTag();         viewHolder.content.setText(list.get(position));         return view;      }   }   private class ViewHolder {      private TextView content;   }}

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