Android 从JSONObject获取索引处的JSONArray

我有一个JSONObject，其中包含多个JSONArray。我已经编写了一个for循环来循环对象，但是我需要在索引位置获取JSONArray。有人知道怎么做吗

这是我的JSONObject

{"Contacts": //JSONObject
  {
    "B"://JSONArray..
    [
        {"ContactName":sdfsdf,"ID":900,"Number":1368349}, 
        {"ContactName":adsdfd,"ID":1900,"Number":136856},  
         {"ContactName":adglkhdofg,"ID":600,"Number":136845}
   ],
  "C":[
         {"ContactName":alkghoi,"ID":900,"Number":1368349},
         {"ContactName":wetete,"ID":1900,"Number":136856}, 
         {"ContactName":dfhtfh,"ID":600,"Number":136845}
     ]
      .....//and so on.. 
      }
} 

JSONArray headerStrings = contacts.names();
                    Log.v("Main", "headerStrings = " + headerStrings);

                    SeparatedListAdapter adapter = new SeparatedListAdapter(this);  

                    for (int t=0; t<contacts.length(); t++){

                    adapter.addSection(headerStrings.getString(t), new DocumentArrayAdapter (getActivity(),R.layout.document_cell,contacts.getJSONArray(t););   

                    }

这里是我的循环，我遇到的问题是，要从JSONObject检索JSONArray，它需要一个字符串，但我试图在JSONObject的对象索引处获取数组

{"Contacts": //JSONObject
  {
    "B"://JSONArray..
    [
        {"ContactName":sdfsdf,"ID":900,"Number":1368349}, 
        {"ContactName":adsdfd,"ID":1900,"Number":136856},  
         {"ContactName":adglkhdofg,"ID":600,"Number":136845}
   ],
  "C":[
         {"ContactName":alkghoi,"ID":900,"Number":1368349},
         {"ContactName":wetete,"ID":1900,"Number":136856}, 
         {"ContactName":dfhtfh,"ID":600,"Number":136845}
     ]
      .....//and so on.. 
      }
} 

JSONArray headerStrings = contacts.names();
                    Log.v("Main", "headerStrings = " + headerStrings);

                    SeparatedListAdapter adapter = new SeparatedListAdapter(this);  

                    for (int t=0; t<contacts.length(); t++){

                    adapter.addSection(headerStrings.getString(t), new DocumentArrayAdapter (getActivity(),R.layout.document_cell,contacts.getJSONArray(t););   

                    }

JSONArray headerStrings=contacts.names（）；
Log.v（“Main”、“headerStrings=“+headerStrings”）；
SeparatedListAdapter=新的SeparatedListAdapter（此）；
对于（int t=0；t试试这个：

for (Iterator it = contacts.keys(); it.hasNext(); ) {
    String name = (String)it.next();
    JSONArray arr = contacts.optJSONArray(name);
    // now add this to your adapter
}

请注意，JSONObject元素的顺序没有定义。
请尝试以下操作：

for (Iterator it = contacts.keys(); it.hasNext(); ) {
    String name = (String)it.next();
    JSONArray arr = contacts.optJSONArray(name);
    // now add this to your adapter
}

注意，JSONObject元素的顺序没有定义。
这里，您将得到匹配的索引

 int matchedIndex =0;
 for(int i=0;i<jsonArray.length();i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);
                if( 123 == jsonObject.getInt("Id")){
                    matchedIndex = i;
                    //jsonArraySelectedBikes.remove(matchedIndex);
                    break;
                }
            } 

int matchedIndex=0；
对于（inti=0；i这里，您将得到匹配的索引

 int matchedIndex =0;
 for(int i=0;i<jsonArray.length();i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);
                if( 123 == jsonObject.getInt("Id")){
                    matchedIndex = i;
                    //jsonArraySelectedBikes.remove(matchedIndex);
                    break;
                }
            } 

int matchedIndex=0；
对于（int i=0；i