java - Android 上的 ProGuard + 反射 = NoSuchFieldException

Question

我叫 Matthew，在使用 ProGuard 后，我在 Android 上遇到了一些问题。

我在 libgdx 中编写游戏，我需要动态获取字符串，我有这样的东西:

package com.PACKAGE;

    public class CLASS extends ANOTHER_CLASS{

        (...)

    private static void load(String fieldName) {
        Field field;
        String fileName;
        try {
            field = SOME_CLASS.class.getField(fieldName);
            fileName = (String) field.get(null);
        } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
            throw new RuntimeException(e);
        }

         SOME_CLASS.SOME_METHOD.load(fileName);

    }

(...)

    private STH get(String fieldName) {
        Field field;
        String fileName;
        try {
            field = SOME_CLASS.class.getField(fieldName);
            fileName = (String) field.get(null);
        } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
            throw new RuntimeException(e);
        }

         return SOME_CLASS.SOME_METHOD.get(fileName);

    }

(...)

}

在我导出发布 apk(编译正常)并运行游戏后，我得到 NoSuchFieldException:

java.lang.RuntimeException: java.lang.NoSuchFieldException: FIELD_NAME

我需要在 proguard-project.txt 中添加什么来处理这个问题？这不起作用，我不知道该怎么做。

-keepclassmembers class com.PACKAGE.CLASS { 
    String fileName;
}

类看起来像:

package com.ANOTHER_PACKAGE;
public class SOME_CLASS {
    public static final String fieldName1 = "string I want";
    public static final String fieldName2 = "string I want";
    public static final String fieldName3 = "string I want";
}

更新:

感谢@Selvin，答案是

-keepclassmembers class ANOTHER_PACKAGE.SOME_CLASS { 
    public static final <fields>; 
}

在 project-proguard.txt 中。现在它完美地工作了:)

Answer 1

在你的 proguard.cnf 文件中试试这个

-keep public class * extends com.yoursite.android.yourappname.YourClassName

-keepclassmembers class * extends com.yoursite.android.yourappname.YourClassName{
 public <init>(android.content.Context);
}

引用:Proguard and reflection in Android