将对象添加到 ArrayList 将对象值设置为 null

Question

我有一个改造请求，它从我的 API 请求 GroupAccount 对象列表。API 毫无问题地返回所有值，因此我尝试循环访问我的活动中的响应，它可以完美地检索值，但是一旦我调用//groupAccounts is my list, declared and initialised globally, groupAccount is the object I create at the end of each iterationgroupAccounts.add(groupAccount);它将所有 groupAccount 对象值设置为 null。为什么会这样？GroupAccount 模型类中的构造函数：public GroupAccount(long groupAccountId,                  long adminId,                  String accountName,                  String accountDescription,                  int numberOfMembers,                  BigDecimal totalAmountPaid,                  BigDecimal totalAmountOwed,                  int testResourceId) {}带有 onResponse & onFailure 的请求方法：public void getUserAssociatedAccounts(String userId){Call<List<GroupAccount>> call = apiInterface.getUserAssociatedAccounts(userId);call.enqueue(new Callback<List<GroupAccount>>() {  @Override  public void onResponse(Call<List<GroupAccount>> call, Response<List<GroupAccount>> response) {    if(!response.isSuccessful()) {      //Handle    } else {      if(response.body().size() > 0){        for(int i=0; i<response.body().size(); i++) {          //This is just for clarity          long groupAccountId = response.body().get(i).getGroupAccountId();          long adminId = response.body().get(i).getAdminId();          String accountName = response.body().get(i).getAccountName();          String accountDescription = response.body().get(i).getAccountDescription();          int numberOfMembers = response.body().get(i).getNumberOfMembers();          BigDecimal amountPaid = response.body().get(i).getTotalAmountPaid();          BigDecimal amountOwed = response.body().get(i).getTotalAmountOwed();          int testRes = R.drawable.human_photo;

Answer 1

您尚未在构造函数中设置对象

您的代码：

public GroupAccount(long groupAccountId,

                  long adminId,

                  String accountName,

                  String accountDescription,

                  int numberOfMembers,

                  BigDecimal totalAmountPaid,

                  BigDecimal totalAmountOwed,

                  int testResourceId) {

}

正确的构造函数：

public GroupAccount(long groupAccountId,

                  long adminId,

                  String accountName,

                  String accountDescription,

                  int numberOfMembers,

                  BigDecimal totalAmountPaid,

                  BigDecimal totalAmountOwed,

                  int testResourceId) {

this.groupAccountId = groupAccountId;

this.adminId = adminId;

this.accountName = accountName;

this.accountDescription = accountDescription;

this.numberOfMembers = numberOfMembers;

this.totalAmountPaid = totalAmountPaid;

this.totalAmountOwed = totalAmountOwed;

this.testResourceId = testResourceId; 

}