我使用以下json作为我的Android应用程序。
[
{
"id" : "001",
"firstName" : "Mark",
"lastName" : "Mason",
"role" : "CEO",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"teamName" : "iOS",
"members" : [
{
"id" : "002",
"firstName" : "Olly",
"lastName" : "Berry",
"role" : "iOS Team Lead",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png",
"teamLead" : true
},
{
"id" : "003",
"firstName" : "James",
"lastName" : "Frost",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "004",
"firstName" : "Liam",
"lastName" : "Nichols",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "005",
"firstName" : "Chris",
"lastName" : "Watson",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "006",
"firstName" : "Richard",
"lastName" : "Turton",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "007",
"firstName" : "Matt",
"lastName" : "Colliss",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "008",
"firstName" : "David",
"lastName" : "Gibson",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "009",
"firstName" : "Tom",
"lastName" : "Guy",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "010",
"firstName" : "Rich",
"lastName" : "Hodgkins",
"role" : "iOS Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
}
]
},
{
"teamName" : "Android",
"members" : [{
"id" : "011",
"firstName" : "David",
"lastName" : "Branton",
"role" : "Android Team Lead",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png",
"teamLead" : true
},
{
"id" : "012",
"firstName" : "Dre",
"lastName" : "Pilipczuk",
"role" : "Android Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "013",
"firstName" : "Ray",
"lastName" : "Britton",
"role" : "Android Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "014",
"firstName" : "Charly",
"lastName" : "Murillo",
"role" : "Android Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
}
]
},
{
"teamName" : "Web",
"members" : [{
"id" : "015",
"firstName" : "Ryan",
"lastName" : "French",
"role" : "Web Team Lead",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png",
"teamLead" : true
},
{
"id" : "016",
"firstName" : "James",
"lastName" : "Ward",
"role" : "Web Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "018",
"firstName" : "Adam",
"lastName" : "Smith",
"role" : "Web Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "019",
"firstName" : "Leonard",
"lastName" : "Da Costa",
"role" : "Web Developer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
}
]
},
{
"teamName" : "Design",
"members" : [{
"id" : "020",
"firstName" : "Hannah",
"lastName" : "Tempest",
"role" : "Design Team Lead",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png",
"teamLead" : true
},
{
"id" : "021",
"firstName" : "Ellis",
"lastName" : "Reed",
"role" : "Designer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "022",
"firstName" : "Pete",
"lastName" : "Horsham",
"role" : "Designer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "023",
"firstName" : "Hemel",
"lastName" : "Dave",
"role" : "Designer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
},
{
"id" : "024",
"firstName" : "Hannah",
"lastName" : "Corke",
"role" : "Designer",
"profileImageURL" : "http://developers.mub.lu/resources/profilePlaceholder.png"
}
]
}
我在recyclerview中成功显示这些数据。但是，我想强调主要摄影师的排。主要摄影师对象有一个＆＃34; teamLead＆＃34;对象，其他人不要。
所以如果我把它设置为真。
for(int j=0;j<teamMembersArray.length();j++){
//The model class which contains the setters/getters
//in order to "deserialize" the JSON objects into string,int,boolean
//objects.
Model m = new Model();
JSONObject teamObject = teamMembersArray.getJSONObject(j);
m.setId(teamObject.getInt("id"));
//This line refers to ALL JSON OBJECTS!!! I want
//to read only those who had teamLead separately from
//the other objects.
if(teamObject.has("teamLead")){
m.setTeamLead(teamObject.getBoolean("teamLead"));
}else {
m.setId(teamObject.getInt("id"));
m.setProfileImageURL(teamObject.getString("profileImageURL"));
m.setFirstName(teamObject.getString("firstName"));
m.setLastName(teamObject.getString("lastName"));
m.setRole(teamObject.getString("role"));
//Finally I am adding the string objects into an ArrayList.
modelArrayList.add(m);
}
我得到一个例外，说teamLeader JSONObject不存在。这是令人困惑和混乱的情况。
我该如何解决？
谢谢，
西奥。
答案 0 :(得分：1)
例外说teamLead JSONObject，不存在
由于teamLead JSONObject's中的teamMembersArray密钥在JSONArray teamLead中的所有JSONObject都不可用。
因此，要使其工作，请在从if (teamObject.has("teamLead") && !teamObject.isNull("teamLead")) {
m.setTeamLead(teamObject.getBoolean("teamLead"));
}else{
m.setTeamLead(false); // set default value here
}
访问{{1}}密钥的值之前添加check for null：
{{1}}