在我的datastorage类中,我使用Gson保存名为setTeam
的String数据并检索名为getTeam
的数据
public class DataStorage {
private static final String TEAM = "Teams";
private static final String TEAM_INFO = "teaminfo";
private static Gson gson = new Gson();
public static void setTeam(MainActivity context, Collection<User> teams) {
String usersJson = gson.toJson(teams);
SharedPreferences.Editor editor = context.getSharedPreferences(TEAM_INFO, Context.MODE_PRIVATE).edit();
editor.putString(TEAM, usersJson);
editor.apply();
}
public static ArrayList<User> getTeam(Context context){
SharedPreferences prefs = context.getSharedPreferences(TEAM_INFO, Context.MODE_PRIVATE);
String usersJson = prefs.getString(TEAM, "[]");
return gson.fromJson(usersJson, new TypeToken<ArrayList<User>>(){}.getType());
}
}
然后我为每个保存在json数据库中的团队创建了一个名为User
的类。因此,对于每个setTeam
,都有一个teamName
gameWon
和gameLost
public class User implements Serializable {
private String teamName;
private int gameWon;
private int gameLost;
public void setName(String name) {this.teamName = name;}
public String getName() {return teamName;}
public void setGameWon(int wonHome){this.gameWon = wonHome;}
public int getGameWon(){return gameWon;}
public void setGameLost (int gameLoss){this.gameLost = gameLoss;}
public int getGameLost(){return gameLost;}
}
在主要活动中,我创建了一个包含一些数字的双字符串ArrayList
。
private final String[][] dataTeams = new String[30][3];
所以在dataTeams double Array中有30个团队使用他们的gameWon和gameLost。 gameWon和gameLost是数字字符串。
所以现在我试图将dataTeams中的任何内容保存到Json数据库中。
User c = new User();
c.setName(dataTeams[i][0]);
c.setGameWon(Integer.parseInt(dataTeams[i][2]));
c.setGameLost(Integer.parseInt(dataTeams[i][3]));
teams.add(c);
DataStorage.setTeam(this, teams);
我成功完成了,但是当我检索数据时;
ArrayList<User> users = DataStorage.getTeam(this);
String [] teams = new String[30];
for(int i = 0; i < 30; i++) {
teams[i] = users.get(i).getName() + " W:" + users.get(i).getGameWon() + " L:" + users.get(i).getGameLost();
}
getName对所有团队都是正确的,但是他们的getGameWon和getGameLost都是0,而不是double数组中的dataTeams
所以现在我陷入困境,当我解析为int时,我所做的Json类DataStorage
是否没有保存字符串
c.setGameWon(Integer.parseInt(dataTeams[i][2]));
c.setGameLost(Integer.parseInt(dataTeams[i][3]));
或者我正在解析整数错误。
dataTeam中的数据是
Team W L
Atlanta 60 22
Boston 40 42
Brooklyn 38 44
Charlotte 33 49
Chicago 50 32
Cleveland 53 29
Dallas 50 32
Denver 30 52
Detroit 32 50
Golden State 67 15
Houston 56 26
Indiana 38 44
L.A. Clippers 56 26
L.A. Lakers 21 61
Memphis 55 27
Miami 37 45
Milwaukee 41 41
Minnesota 16 66
New Orleans 45 37
New York 17 65
Oklahoma City 45 37
Orlando 25 57
Philadelphia 18 64
Phoenix 39 43
Portland 51 31
Sacramento 29 53
San Antonio 55 27
Toronto 49 33
Utah 38 44
Washington 46 36
答案 0 :(得分:0)
您的声明:
private final String[][] dataTeams = new String[30][3];
您的设置数据逻辑:
c.setGameWon(Integer.parseInt(dataTeams[i][2])); // << [i][1]
c.setGameLost(Integer.parseInt(dataTeams[i][3])); // << [i][2]
可能是索引不正确导致错误发生。