android - 在 TextView 中显示一个整数

Question

在我的 Player.java 对象类中，我有以下代码

private static int playerAge;

与 playerAge = 18; 在我的构造方法中

    public static int getplayerAge() {
    return playerAge;
}

但是，当我试图在扩展 Activity 的 java 类中获取玩家年龄时，它总是显示“0”，而不是像预期的那样显示“18”。这是我的代码。

TextView playerAge = (TextView) findViewById(R.id.tvPlayerAge);
        playerAge.setText("Age: " + Integer.toString(Player.getplayerAge()));

我做错了什么？谢谢!

顺便说一下，如果我将 private static int playerAge; 从最顶部更改为 private static int playerAge = 18; 它可以工作，只是不明白为什么它不能从构造方法中工作。

Player.java类

public class Player extends Object {

    //Instance Data
    private static String playerName;
    private static int playerAge = 1;
    private static boolean sterile; 

    //Default Constructor
    public Player() {
        playerName = "";
        playerAge = 5; //For some reason you have to inetiate the playerAge in the instance data for
                            //it to be able to read it...
        sterile = true; //Default Value
    }

    //Constructor
    public Player(String pName, int pAge, boolean isSterile)    {
        playerName = pName;
        playerAge = pAge;
        sterile = isSterile;
    }


    //Accessor Methods (Getters)
    public static String getplayerName() {
        return playerName;
    }

    public static int getplayerAge() {
        return playerAge;
    }

    public static boolean getplayerDiseasedState() { //Sterile or not?
        return sterile;
    }


    //Mutator Methods (Setters)
    public static void setPlayerName(String name) {
        playerName = name;
    }

    public static void setplayerAge(int age) {
        playerAge = age;
    }

    public static boolean setSterileState(boolean diseased) {
        return sterile = diseased;
    }


    //toString (Accessor)
    public String toString() {
        String toString =   "Player Name: "+ playerName + "\n" +
                "Player Age: " + playerAge + "\n" +
                "Player Diseased: "  + sterile + "\n";
    return toString;
        }



     } 

Answer 1

您不需要 Integer.toString() 位。只需使用:

player.setText("Age: " + Player.getPlayerAge());