Android 和 Java的java.lang.reflect.Field的API不一致，该方法适用于Java，通过反射方法更改final static 变量,http://stackoverflow.com/网站找到的，自己修改了一下，储存起来

FinalVariateChangeByReflection.java

public class FinalVariateChangeByReflection {

    public static final String HOST_NAME;

    public static final String HOST_NAME_CHANGE = "http://www.apple.com";

    private static final String MODIFY_PERMISSION_FIELD = "modifiers";

    static {
        HOST_NAME = "http://www.google.com";
    }

    public static void main(String[] args) {

        System.out.println(FinalVariateChangeByReflection.HOST_NAME);
        changeFinalStatic();

    }

    public static void changeFinalStatic()  {
        Field staticFinalField = null;
        try {
            staticFinalField = FinalVariateChangeByReflection.class.getDeclaredField("HOST_NAME");
            staticFinalField.setAccessible(true);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }

//      Modify the final using reflection
        Field modifiersField = null;
        try {
            modifiersField = Field.class.getDeclaredField(MODIFY_PERMISSION_FIELD);
            modifiersField.setAccessible(true);
            try {
                modifiersField.setInt(staticFinalField, staticFinalField.getModifiers() & ~Modifier.FINAL);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }


        try {
            staticFinalField.set(FinalVariateChangeByReflection.class, HOST_NAME_CHANGE);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        System.out.println(FinalVariateChangeByReflection.HOST_NAME);
    }
}