在Android library中不能使用switch-case语句访问资源ID的原因分析及解决方案

Posted 2020-10-17 zimengfang的博客

报错是因为case分支后面跟的参数必须是常数,也就是说library中的R.java的资源ID不是常数，

public static final class animator {
    public static int design_appbar_state_list_animator = 0x7f020001;
}
public static final class array {
    public static int card_tabList = 0x7f030001;
}
public static final class attr {
    public static int actionBarDivider = 0x7f040001;
    public static int actionBarItemBackground = 0x7f040002;
    public static int actionBarPopupTheme = 0x7f040003;

...}

如上面所示每一个资源ID都没有被声明为final
项目下的R.java的资源ID如下

public static final class animator {
  public static final int design_appbar_state_list_animator=0x7f020000;
}
public static final class array {
  public static final int card_tabList=0x7f030000;
  public static final int tab_list=0x7f030001;
}

查了很多资料,除了用if-else替换没有其他解决方案[Facepalm]