【发布时间】：2019-01-07 21:35:23
【问题描述】：
我是 JSON 解析的新手，我一直无法理解 JSONArrays 和 JSONObjects 以及如何浏览它们。我的应用程序解析 JSON 数据并将其显示在回收站视图中。 JSON 响应包含三个我想从中获取数据的 JSON 数组。办公室、官员和地址数组。这里的问题是地址数组在官方数组中，我不知道如何解析该数据。该应用程序适用于某些数据，但是当我尝试解析地址数组中的数据时，我从 logcat 中收到错误消息。这是整个 JSON 响应
{
"normalizedInput": {
"line1": "2613 Irvington Avenue",
"city": "San Bernardino",
"state": "CA",
"zip": "92407"
},
"offices": [
{
"name": "President of the United States",
"levels": [
"country"
],
"roles": [
"headOfState",
"headOfGovernment"
]
},
{
"name": "Vice-President of the United States",
"levels": [
"country"
],
"roles": [
"deputyHeadOfGovernment"
]
},
{
"name": "United States Senate",
"levels": [
"country"
],
"roles": [
"legislatorUpperBody"
]
},
{
"name": "United States House of Representatives CA-31",
"levels": [
"country"
],
"roles": [
"legislatorLowerBody"
]
},
{
"name": "Governor",
"levels": [
"administrativeArea1"
],
"roles": [
"headOfGovernment"
]
},
{
"name": "Lieutenant Governor",
"levels": [
"administrativeArea1"
],
"roles": [
"deputyHeadOfGovernment"
]
},
{
"name": "City Treasurer"
},
{
"name": "Mayor"
},
{
"name": "City Attorney"
},
{
"name": "City Clerk"
},
{
"name": "Sheriff-Coroner"
},
{
"name": "Auditor-Controller-Treasurer-Tax Collector"
},
{
"name": "District Attorney"
},
{
"name": "Assessor-Clerk-Recorder"
},
{
"name": "San Bernardino County Superior Court Judge"
},
{
"name": "CA State Assembly District 40"
},
{
"name": "CA State Senate District 23"
},
{
"name": "Board of Supervisors, District 5"
},
{
"name": "Secretary of State"
},
{
"name": "State Treasurer"
},
{
"name": "Attorney General"
},
{
"name": "State Superintendent of Public Instruction"
},
{
"name": "State Controller"
},
{
"name": "Insurance Commissioner"
}
],
"officials": [
{
"name": "Donald J. Trump",
"address": [
{
"line1": "The White House",
"line2": "1600 Pennsylvania Avenue NW",
"city": "Washington",
"state": "DC",
"zip": "20500"
}
],
"party": "Republican",
"phones": [
"(202) 456-1111"
],
"photoUrl": "https://www.whitehouse.gov/sites/whitehouse.gov/files/images/45/PE%20Color.jpg",
"channels": [
{
"type": "GooglePlus",
"id": "+whitehouse"
},
{
"type": "Facebook",
"id": "whitehouse"
},
{
"type": "Twitter",
"id": "potus"
},
{
"type": "YouTube",
"id": "whitehouse"
}
]
},
{
"name": "Mike Pence",
"address": [
{
"line1": "The White House",
"line2": "1600 Pennsylvania Avenue NW",
"city": "Washington",
"state": "DC",
"zip": "20500"
}
],
"party": "Republican",
"phones": [
"(202) 456-1111"
],
"photoUrl": "https://www.whitehouse.gov/sites/whitehouse.gov/files/images/45/VPE%20Color.jpg",
"channels": [
{
"type": "GooglePlus",
"id": "+whitehouse"
},
{
"type": "Facebook",
"id": "whitehouse"
},
{
"type": "Twitter",
"id": "VP"
}
]
},
{
"name": "Kamala D. Harris",
"address": [
{
"line1": "112 Hart Senate Office Building",
"city": "Washington",
"state": "DC",
"zip": "20510"
}
],
"party": "Democratic",
"phones": [
"(202) 224-3553"
],
"channels": [
{
"type": "Twitter",
"id": "KamalaHarris"
},
{
"type": "YouTube",
"id": "UC0XBsJpPhOLg0k4x9ZwrWzw"
}
]
},
{
"name": "Dianne Feinstein",
"address": [
{
"line1": "331 Hart Senate Office Building",
"city": "Washington",
"state": "DC",
"zip": "20510"
}
],
"party": "Democratic",
"phones": [
"(202) 224-3841"
],
"photoUrl": "http://bioguide.congress.gov/bioguide/photo/F/F000062.jpg",
"channels": [
{
"type": "Facebook",
"id": "SenatorFeinstein"
},
{
"type": "Twitter",
"id": "SenFeinstein"
},
{
"type": "YouTube",
"id": "SenatorFeinstein"
}
]
},
{
"name": "Pete Aguilar",
"address": [
{
"line1": "1223 Longworth House Office Building",
"city": "Washington",
"state": "DC",
"zip": "20515"
}
],
"party": "Democratic",
"phones": [
"(202) 225-3201"
],
"photoUrl": "https://aguilar.house.gov/sites/aguilar.house.gov/files/styles/congress_image_medium/public/wysiwyg_uploaded/Headshot_0.jpg?itok=LSt7qkOV",
"channels": [
{
"type": "Facebook",
"id": "reppeteaguilar"
},
{
"type": "Twitter",
"id": "RepPeteAguilar"
},
{
"type": "YouTube",
"id": "UCIXCmfuRWrbgdTw257_lxJQ"
},
{
"type": "YouTube",
"id": "UCxwbFLOlKDsXrwizV5jah7g"
}
]
},
{
"name": "Edmund G. Brown Jr.",
"address": [
{
"line1": "c/o State Capitol",
"line2": "Suite 1173",
"city": "Sacramento",
"state": "CA",
"zip": "95814"
}
],
"party": "Democratic",
"phones": [
"(916) 445-2841"
],
"channels": [
{
"type": "GooglePlus",
"id": "+JerryBrown"
},
{
"type": "Facebook",
"id": "jerrybrown"
},
{
"type": "Twitter",
"id": "JerryBrownGov"
}
]
},
{
"name": "Gavin Newsom",
"address": [
{
"line1": "State Capitol",
"line2": "Suite 1114",
"city": "Sacramento",
"state": "CA",
"zip": "95814"
}
],
"party": "Democratic",
"phones": [
"(916) 445-8994"
],
"photoUrl": "http://www.ltg.ca.gov/images/newsimages/i2.png",
"emails": [
"gavin@gavinnewsom.com"
],
"channels": [
{
"type": "GooglePlus",
"id": "+GavinNewsom"
},
{
"type": "Facebook",
"id": "GavinNewsom"
},
{
"type": "Twitter",
"id": "gavinnewsom"
}
]
},
{
"name": "David C. Kennedy",
"address": [
{
"line1": "300 N. \"D\" Street",
"line2": "2nd Floor",
"city": "San Bernardino",
"state": "CA",
"zip": "92418"
}
],
"party": "Nonpartisan",
"phones": [
"(909) 384-5022"
]
},
{
"name": "R. Carey Davis",
"address": [
{
"line1": "300 N. \"D\" Street - 6th Floor",
"city": "San Bernardino",
"state": "CA",
"zip": "92418"
}
],
"party": "Nonpartisan",
"phones": [
"(909) 384-5133"
],
"channels": [
{
"type": "Facebook",
"id": "MayorCareyDavis"
}
]
},
{
"name": "Gary D. Saenz",
"address": [
{
"line1": "300 N. \"D\" Street",
"line2": "6th Floor",
"city": "San Bernardino",
"state": "CA",
"zip": "92418"
}
],
"party": "Nonpartisan",
"phones": [
"(909) 384-5355"
],
"emails": [
"Attorney@sbcity.org"
]
},
{
"name": "Georgeann \"Gigi\" Hanna",
"address": [
{
"line1": "300 N. \"D\" Street",
"line2": "2nd Floor",
"city": "San Bernardino",
"state": "CA",
"zip": "92418"
}
],
"party": "Nonpartisan",
"phones": [
"(909) 384-5002"
]
},
{
"name": "John McMahon",
"address": [
{
"line1": "655 East Third Street",
"city": "San Bernardino",
"state": "CA",
"zip": "92415"
}
],
"party": "Nonpartisan",
"phones": [
"(760) 956-5001"
],
"emails": [
"paffairs@sbcsd.org"
],
"channels": [
{
"type": "Facebook",
"id": "sbcountysheriff"
},
{
"type": "Twitter",
"id": "sbcountysheriff"
}
]
},
{
"name": "Oscar Valdez",
"address": [
{
"line1": "222 W. Hospitality Lane",
"line2": "4th Floor",
"city": "San Bernardino",
"state": "CA",
"zip": "92415"
}
],
"party": "Nonpartisan",
"phones": [
"(909) 382-7014"
]
},
{
"name": "Michael Ramos",
"address": [
{
"line1": "303 West 3rd Street",
"line2": "6th Floor",
"city": "San Bernardino",
"state": "CA",
"zip": "92415"
}
],
"party": "Nonpartisan",
"phones": [
"(909) 382-3669"
],
"channels": [
{
"type": "Facebook",
"id": "SanBernardinoCountyDistrictAttorney"
},
{
"type": "Twitter",
"id": "sbcountyda"
}
]
},
{
"name": "Bob Dutton",
"address": [
{
"line1": "First Floor",
"line2": "222 W. Hospitality Lane",
"city": "San Bernardino",
"state": "CA",
"zip": "92415"
}
],
"party": "Nonpartisan",
"phones": [
"(855) 732-2575"
]
},
{
"name": "Denise Trager Dvorak",
"party": "Nonpartisan"
},
{
"name": "James C. Ramos",
"address": [
{
"line1": "PO BOX 942849",
"city": "Sacramento",
"state": "CA",
"zip": "94249"
}
],
"party": "Democratic Party",
"phones": [
"(916) 319-2040"
]
},
{
"name": "Mike Morrell",
"address": [
{
"line1": "STATE CAPITOL",
"line2": "1303 10TH ST RM 3056",
"city": "Sacramento",
"state": "CA",
"zip": "95814"
}
],
"party": "Republican",
"phones": [
"(909) 919-7731"
],
"photoUrl": "http://senate.ca.gov/sites/senate.ca.gov/files/senator_photos/morrell-mike.jpg",
"emails": [
"senator.morrell@senate.ca.gov"
],
"channels": [
{
"type": "Twitter",
"id": "MikeMorrellGOP"
},
{
"type": "Facebook",
"id": "MikeMorrellGOP"
}
]
},
{
"name": "Josie Gonzales",
"address": [
{
"line1": "385 N. Arrowhead Ave.",
"line2": "5th Fl.",
"city": "San Bernardino",
"state": "CA",
"zip": "92415"
}
],
"party": "Nonpartisan",
"phones": [
"(909) 387-4565"
],
"channels": [
{
"type": "Facebook",
"id": "supervisorgonzales"
},
{
"type": "Twitter",
"id": "SupervisorJosie"
}
]
},
{
"name": "Alex Padilla",
"address": [
{
"line1": "1500 11th Street,",
"city": "Sacramento",
"state": "CA",
"zip": "95814"
}
],
"party": "Democratic",
"phones": [
"(916) 653-7244"
],
"emails": [
"secretary.padilla@sos.ca.gov"
],
"channels": [
{
"type": "Facebook",
"id": "CaliforniaSOS"
},
{
"type": "Twitter",
"id": "CASOSvote"
}
]
},
{
"name": "John Chiang",
"address": [
{
"line1": "P.O. Box 942809",
"city": "Sacramento",
"state": "CA",
"zip": "94209"
}
],
"party": "Democratic",
"phones": [
"(916) 653-2995"
],
"channels": [
{
"type": "Twitter",
"id": "STONewsroom"
}
]
},
{
"name": "Xavier Becerra",
"address": [
{
"line1": "Office of the Attorney General",
"line2": "1300 \"I\" Street",
"city": "Sacramento",
"state": "CA",
"zip": "95814"
}
],
"party": "Democratic",
"phones": [
"(916) 445-9555"
],
"channels": [
{
"type": "Facebook",
"id": "XavierBecerra"
},
{
"type": "Twitter",
"id": "AGBecerra"
}
]
},
{
"name": "Tom Torlakson",
"address": [
{
"line1": "1430 N Street,",
"city": "Sacramento",
"state": "CA",
"zip": "95814"
}
],
"party": "Nonpartisan",
"phones": [
"(916) 319-0800"
],
"emails": [
"superintendent@cde.ca.gov"
],
"channels": [
{
"type": "Facebook",
"id": "CAEducation"
},
{
"type": "Twitter",
"id": "cadepted"
}
]
},
{
"name": "Betty T. Yee",
"address": [
{
"line1": "P.O. Box 942850",
"city": "Sacramento",
"state": "CA",
"zip": "94250"
}
],
"party": "Democratic",
"phones": [
"(916) 445-2636"
],
"channels": [
{
"type": "Facebook",
"id": "137732083043662"
},
{
"type": "Twitter",
"id": "CAController"
}
]
},
{
"name": "Dave Jones",
"address": [
{
"line1": "300 Capitol Mall,",
"city": "Sacramento",
"state": "CA",
"zip": "95814"
}
],
"party": "Democratic",
"phones": [
"(916) 492-3500"
],
"channels": [
{
"type": "GooglePlus",
"id": "108233445289196913395"
},
{
"type": "Facebook",
"id": "insurancecagov"
},
{
"type": "Twitter",
"id": "CDINews"
}
]
}
]
}
解析函数：
//fetch json data from Civic API
private void getData(){
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading...");
progressDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
progressDialog.dismiss();
try{
JSONObject jsonObject = new JSONObject(response);
//first loop through offices array. Retrieve officeName value
JSONArray officesArray = jsonObject.getJSONArray("offices"); //One array for offices
JSONArray officialsArray = jsonObject.getJSONArray("officials"); //one array for officials
for (int i = 0; i < officesArray.length(); i++) {
JSONObject jsonOffices = officesArray.getJSONObject(i);
JSONObject jsonOfficials = officialsArray.getJSONObject(i);
JSONObject jsonAddress = jsonOfficials.getJSONObject("address");
String line1 = jsonAddress.getJSONObject("address").getString("line1");
String city = jsonAddress.getJSONObject("address").getString("city");
String state = jsonAddress.getJSONObject("address").getString("state");
String zip = jsonAddress.getJSONObject("address").getString("zip");
if (jsonOfficials.has("photoUrl")) {
Reps reps1 = new Reps(jsonOffices.getString("name"),
jsonOfficials.getString("name"),
jsonOfficials.getString("party"),
jsonOfficials.getString("photoUrl"),
line1,
city,
state,
zip
);
repList.add(reps1);
} else {
Reps reps2 = new Reps(jsonOffices.getString("name"),
jsonOfficials.getString("name"),
jsonOfficials.getString("party"),
line1,
city,
state,
zip
);
repList.add(reps2);
}
}
adapter = new RepRvAdapter(repList, getApplicationContext());
myrv.setAdapter(adapter);
}catch (JSONException e){
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", error.toString());
progressDialog.dismiss();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
logcat 错误说 JSONArray 无法转换为 JSONObject
我明白为什么会出现此错误。这是因为我在 JSON 数组上调用 .getJSONObject，但我不确定如何修复它。
编辑：添加了一些日志标签以进行故障排除。似乎没有找到 Denise Trager Dvorak 的地址值。这就是错误所在。我如何解决它？
【问题讨论】：