读取Assets里的图片

Bitmap bmp = getImageFromAssetsFile("/assets/icon_add_pic.png");

 private Bitmap getImageFromAssetsFile(String fileName)  
	  {  
	      Bitmap image = null;  
	      try  
	      {  
	    	  InputStream is = getClass().getResourceAsStream(fileName);
	          image = BitmapFactory.decodeStream(is);  
	          is.close();  
	      }  
	      catch (IOException e)  
	      {  
	          e.printStackTrace();  
	      }  
	      return image;  
	  }  

读取raw里的文件：（大于1M的视频）

String url= "android.resource://" + getPackageName() + "/"+ R.raw.demodave;