如何用BitmapFactory来实现图片的简单压缩

话不多少，直接上代码：

public static Bitmap compressImage(InputStream in) {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		int len = 0;
		byte[] buffer = new byte[1024];
		try {
			while((len = in.read(buffer)) != -1){
				baos.write(buffer, 0, len);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		byte[] data = baos.toByteArray();
		
		Options opts = new Options();
		opts.inJustDecodeBounds = true;
		BitmapFactory.decodeByteArray(data, 0, data.length, opts );
		
		int width = opts.outWidth;
		int height = opts.outHeight;
		
		int wCompress = 60;
		int hCompress = 60;
		
		int wScale = width/wCompress;
		int hScale = height/hCompress;
		
		int scale = Math.max(wScale, hScale);
		
		if(scale <= 0){
			scale = 1;
		}
		
		opts.inJustDecodeBounds = false;
		opts.inSampleSize = scale;
		
		return BitmapFactory.decodeByteArray(data, 0, data.length, opts);
	}