通过名字获得图片的id

最新推荐文章于 2025-05-07 15:23:10 发布

转载最新推荐文章于 2025-05-07 15:23:10 发布 · 619 阅读

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本文介绍了一种在Java中通过指定包名和资源名称来获取对应资源ID的方法。此方法利用反射机制实现了跨包访问资源的功能，适用于Android等应用程序开发场景。

    public static void main() throws SecurityException, NoSuchFieldException,
                IllegalArgumentException, IllegalAccessException,
                ClassNotFoundException
        {
            String resourceName = "R.drawable.icon";
            String packageName = "com.bbcode";
            int resourceId = getResourceId(packageName, resourceName);
            if(R.drawable.icon == resourceId){
                //success
                ;
            }
        }
        public static int getResourceId(String packageName, String resourceName)
                throws SecurityException, NoSuchFieldException,
                IllegalArgumentException, IllegalAccessException,
                ClassNotFoundException
        {
            String[] splitStr = resourceName.split("\\.");
            String classStr = splitStr[0] + "$" + splitStr[1];
            Class c = Class.forName(packageName + "." + classStr);
            Field f = c.getDeclaredField(splitStr[2]);
            return f.getInt(f.getName());
        }