通过inputStream读取图片方法

public static byte[] readStream(InputStream inStream) throws Exception {  	ByteArrayOutputStream outSteam = new ByteArrayOutputStream();  	byte[] buffer = new byte[1024];  	int len = -1;  	while ((len = inStream.read(buffer)) != -1) {               //write(byte[] b, int off, int len)             //将指定 byte 数组中从偏移量 off 开始的 len 个字节写入此 byte 数组输出流。             outSteam.write(buffer, 0, len);	}  	outSteam.close();  	inStream.close();  	return outSteam.toByteArray();  }

URL url = new URL(image_url);  InputStream is = url.openStream();