Question

基本上我试图遍历JSONArray并基于其中一个对象中的一个键的值，我试图获取同一对象中另一个键的值。

更具体地说，我有一个值，我想传递给一个方法，并在该方法中我想循环通过一个JSONArray，当循环找到具有我传入的值的JSONObject时，我想要使用该对象设置新值。

我尝试循环遍历JSONArray并在模型类中设置值，然后在循环找到我要查找的值时从同一模型类获取。

我是初学程序员，所以我不确定自己是否走在正确的轨道上。

以下是我一直尝试的方法：

private String getTeamAbbrev(String jsonData, Integer opponentTeamId) {
    Team[] teams = null;
    String opponentAbbrev = null;
    try {
        JSONArray root = new JSONArray(jsonData);
        teams = new Team[root.length()];

    for (int i = 0; i < root.length(); i++){

        JSONObject jsonTeam = root.getJSONObject(i);
        Team team = new Team();

        team.setTeamId(jsonTeam.getInt("team_id"));
        team.setCity(jsonTeam.getString("city"));
        team.setAbbrev(jsonTeam.getString("abbreviation"));
        team.setFullName(jsonTeam.getString("team_name"));

        teams[i] = team;

        if(team.getTeamId() == opponentTeamId)) {
    opponentAbbrev = team.getAbbrev();
}

    }

} catch (JSONException e) {
    e.printStackTrace();
}
    return opponentAbbrev;
}

这是我制作的模型类：

public class Team {

private String mAbbrev;
private String mCity;
private Integer mTeamId;
private String mFullName;

public String getAbbrev() {
    return mAbbrev;
}

public void setAbbrev(String abbrev) {
    mAbbrev = abbrev;
}

public String getCity() {
    return mCity;
}

public void setCity(String city) {
    mCity = city;
}

public Integer getTeamId() {
    return mTeamId;
}

public void setTeamId(Integer teamId) {
    mTeamId = teamId;
}

public String getFullName() {
    return mFullName;
}

public void setFullName(String fullName) {
    mFullName = fullName;
}
}

JSON看起来像这样：

[ { "abbreviation" : "ATL",
"city" : "Atlanta",
"team_id" : 1610612737,
"team_name" : "Hawks"
},
{ "abbreviation" : "BOS",
"city" : "Boston",
"team_id" : 1610612738,
"team_name" : "Celtics"
},
{ "abbreviation" : "CLE",
"city" : "Cleveland",
"team_id" : 1610612739,
"team_name" : "Cavaliers"
},
{ "abbreviation" : "NOP",
"city" : "New Orleans",
"team_id" : 1610612740,
"team_name" : "Pelicans"
}]

基于＆＃34; team_id＆＃34;我从一个单独的api请求得到了，我想得到＆＃34;缩写＆＃34;的价值。键。

这是调试行

if(team.getTeamId() == (opponentTeamId)) {opponentAbbrev = team.getAbbrev(); }

this = {oneonanyone.com.fantasybasketball_1onany1.MatchupActivity@831701908048}
jsonData = {java.lang.String@831708371144}"[ { "abbreviation" : "ATL",\n    "city" : "Atlanta",\n    "team_id" : 1610612737,\n    "team_name" : "Hawks"\n  },\n  { "abbreviation" : "BOS",\n    "city" : "Boston",\n    "team_id" : 1610612738,\n    "team_name" : "Celtics"\...
opponentTeamId = {java.lang.Integer@831708367536}"1610612740"
value = 1610612740
teams = {oneonanyone.com.fantasybasketball_1onany1.DataModel.Team[30]@831708408096}
[0] = {oneonanyone.com.fantasybasketball_1onany1.DataModel.Team@831708408232}
mAbbrev = {java.lang.String@831708378296}"ATL"
mCity = {java.lang.String@831708378536}"Atlanta"
mFullName = {java.lang.String@831708378944}"Hawks"
value = {char[5]@831708379008}
hashCode = 0
offset = 0
count = 5
mTeamId = {java.lang.Integer@831708408328}"1610612737"
opponentAbbrev = null
root = {org.json.JSONArray@831708378040}"[{"abbreviation":"ATL","team_id":1610612737,"team_name":"Hawks","city":"Atlanta"},{"abbreviation":"BOS","team_id":1610612738,"team_name":"Celtics","city":"Boston"},{"abbreviation":"CLE","team_id":1610612739,"team_name"...
values = {java.util.ArrayList@831708378096} size = 30
i = 0
jsonTeam = {org.json.JSONObject@831708378120}"{"abbreviation":"ATL","team_id":1610612737,"team_name":"Hawks","city":"Atlanta"}"
nameValuePairs = {java.util.HashMap@831708378136} size = 4
team = {oneonanyone.com.fantasybasketball_1onany1.DataModel.Team@831708408232}
mAbbrev = {java.lang.String@831708378296}"ATL"
mCity = {java.lang.String@831708378536}"Atlanta"
mFullName = {java.lang.String@831708378944}"Hawks"
mTeamId = {java.lang.Integer@831708408328}"1610612737"
teams[i] = {oneonanyone.com.fantasybasketball_1onany1.DataModel.Team@831708408232}
mAbbrev = {java.lang.String@831708378296}"ATL"
mCity = {java.lang.String@831708378536}"Atlanta"
mFullName = {java.lang.String@831708378944}"Hawks"
mTeamId = {java.lang.Integer@831708408328}"1610612737"

感谢您的帮助！

Answer 1

您不应该使用if(team.getTeamId().equals(opponentTeamId)) { opponentAbbrev = team.getAbbrev().toString(); }进行字符串比较。

试试这个：

{{1}}

祝你好运。

设置一个对象类，然后以相同的方法从中获取，循环遍历JSON并按值而不是键

1 个答案: