[Android]反射读取drawable中图片

1、获取指定名字的图片 的Id（不带后缀名）

try{final Class<?> drawableClass = R.drawable.class;final Field field = drawableClass.getField(imgname);int drawableId= field.getInt(field.getName());}catch(Exception e){e.printStackTrace();}

2、读取全部图片，获取某些图片的Id

ArrayList<Integer> idArray=new ArrayList<Integer>();Field[] fields = R.drawable.class.getDeclaredFields();  for (Field field : fields) {if(field.getName.startsWith("icon_"){int index=field.getInt(R.drawable.class);idArray.add(index);}}