java - android/java getIdentifier 与

Question

我无法让 getIdentifier 处理类变量。这很奇怪，因为这有效:

public Drawable getStationIcon(Context context) {
    int resId = context.getResources().getIdentifier("m1m2_16", "drawable", "com.mypackage.namehere");
    Drawable drawable = context.getResources().getDrawable(resId);
    return drawable;
}

但这不是:

public Drawable getStationIcon(Context context) {
    int resId = context.getResources().getIdentifier(this.stationIcon, "drawable", "com.mypackage.namehere");
    Drawable drawable = context.getResources().getDrawable(resId);
    return drawable;
}

这也不行:

public Drawable getStationIcon(Context context) {
    String stationI = this.stationIcon;
    int resId = context.getResources().getIdentifier(stationI, "drawable", "com.mypackage.namehere");
    Drawable drawable = context.getResources().getDrawable(resId);
    return drawable;
}

this.stationIcon 绝对等于 m1m2_16。我已经尝试过其他替代方法，即使用 ""+this.stationIcon，但是当第一个参数是变量时没有任何效果。有什么我想念的吗？

Answer 1

奇怪的是它可能会起作用:

getIdentifier("com.mypackage.namehere:drawable/" + this.stationIcon, null, null);

来源:https://stackoverflow.com/users/790997/idroid

Resources.getIdentifier() has unexpected behavior when name is numeric