整数不能转换为java.util.HashMap [英] Integer cannot be cast to java.util.HashMap

问题描述

  @Override在Android上使用listview时，下面的代码在给列表项目单击时出错
 public void onItemClick（AdapterView<？> parent，View view，
 int position，long id）{
 
 //获取列表视图大小
 int size = parent.getCount（）; 
 
 //根据列表视图大小初始化数组
 String [] all_pid = new String [size]; 
 String [] all_name = new String [size]; 
 String [] all_address = new String [size]; 
 String [] all_latitude = new String [size]; 
 String [] all_longitude = new String [size]; 
 
 //根据getItemAtPosition将数据循环到数组
 for（int i = 0; i< size; i ++）{
 HashMap< String，String> extractor =（HashMap< String，String>）parent.getItemAtPosition（i）; 
 //将数据填入数组
 all_pid [i] = extractor.get（pid）; 
 all_name [i] = extractor.get（name）; 
 all_address [i] = extractor.get（address）; 
 all_latitude [i] = extractor.get（latitude）; 
 all_longitude [i] = extractor.get（longitude）; 
} 
 
 Intent in = new Intent（getApplicationContext（），SingleContactActivityMainFragment.class）; 
 
 in.putExtra（APid，all_pid）; 
 in.putExtra（AName，all_name）; 
 in.putExtra（AAddress，all_address）; 
 in.putExtra（ALatitude，all_latitude）; 
 in.putExtra（ALongitude，all_longitude）; 
 //为初始视图分页器初始化添加大小
 in.putExtra（size，size）; 
 in.putExtra（QUOTES，position）; 
 Log.v（DEBUG，position Passed：+ position）; 
 startActivity（in）; 
 
 $ / code> 

显示的错误是：



  05-27 15：30：12.985：E / AndroidRuntime（23905）：java.lang.ClassCastException：java.lang.Integer不能转换为java.util.HashMap 
 05-27 15：30：12.985：E / AndroidRuntime（23905）：at com.example.fightvaw.jsontest.MainActivity $ 4.onItemClick（MainActivity.java:226）
  

如何解决这类错误？

这是以前的代码在我的自定义适配器上：

  @Override 
 public Object getItem（int position）{
 // TODO自动生成的方法存根
 return（position）; 
} 
  

这就解决了我的自定义适配器中的代码：

  @Override 
 public Object getItem（int position）{
 // TODO自动生成的方法存根
返回数据获得（位置）; 
} 
  

其中数据被定义为 ArrayList< HashMap< String，String>>数据;

Im using listview on android, below code is giving error after clicking on a list item for another new activity

@Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {

                // getting list view size
                int size = parent.getCount();

                // initializing array according to list view size
                String[] all_pid = new String[size];
                String[] all_name = new String[size];
                String[] all_address = new String[size];
                String[] all_latitude = new String[size];
                String[] all_longitude = new String[size];

                // looping data into array according to getItemAtPosition
                for (int i = 0; i < size; i++) {
                    HashMap<String, String> extractor = (HashMap<String, String>) parent.getItemAtPosition(i);
                    // fill data into array
                    all_pid[i] = extractor.get("pid");
                    all_name[i] = extractor.get("name");
                    all_address[i] = extractor.get("address");
                    all_latitude[i] = extractor.get("latitude");
                    all_longitude[i]=extractor.get("longitude");
                }

                Intent in = new Intent(getApplicationContext(),SingleContactActivityMainFragment.class);

                in.putExtra("APid", all_pid);
                in.putExtra("AName", all_name);
                in.putExtra("AAddress", all_address);
                in.putExtra("ALatitude", all_latitude);
                in.putExtra("ALongitude", all_longitude);
                // added size for initial view pager initialization
                in.putExtra("size", size);
                in.putExtra("QUOTES", position);
                Log.v(DEBUG, "position Passed: " + position);
                startActivity(in);
            }

Error shown is:

05-27 15:30:12.985: E/AndroidRuntime(23905): java.lang.ClassCastException: java.lang.Integer cannot be cast to java.util.HashMap
05-27 15:30:12.985: E/AndroidRuntime(23905):    at com.example.fightvaw.jsontest.MainActivity$4.onItemClick(MainActivity.java:226)

how to solve these type of error ?

解决方案

this is previous code on my custom adapter:

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return (position);
}

and this is solved code in my custom adapter:

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return data.get(position);
}

in which datais defined as ArrayList<HashMap<String, String>> data;

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