Android Socket服务端与客户端用字符串的方式互相传递图片的方法

<span style="font-family: comic sans ms,sans-serif; font-size: 16px;">private Bitmap getimage(String srcPath) {BitmapFactory.Options newOpts = new BitmapFactory.Options();// 开始读入图片，此时把options.inJustDecodeBounds 设回true了newOpts.inJustDecodeBounds = true;Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);// 此时返回bm为空newOpts.inJustDecodeBounds = false;int w = newOpts.outWidth;int h = newOpts.outHeight;// 现在主流手机比较多是800*480分辨率，所以高和宽我们设置为float hh = 100f;// 这里设置高度为800ffloat ww = 100f;// 这里设置宽度为480f// 缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可int be = 1;// be=1表示不缩放if (w > h && w > ww) {// 如果宽度大的话根据宽度固定大小缩放be = (int) (newOpts.outWidth / ww);} else if (w < h && h > hh) {// 如果高度高的话根据宽度固定大小缩放be = (int) (newOpts.outHeight / hh);}if (be <= 0)be = 1;newOpts.inSampleSize = be;// 设置缩放比例// 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了bitmap = BitmapFactory.decodeFile(srcPath, newOpts);return compressImage(bitmap);// 压缩好比例大小后再进行质量压缩}</span> 

<span style="font-family: comic sans ms,sans-serif; font-size: px;">private Bitmap compressImage(Bitmap image) {ByteArrayOutputStream baos = new ByteArrayOutputStream();image.compress(Bitmap.CompressFormat.JPEG, , baos);// 质量压缩方法，这里表示不压缩，把压缩后的数据存放到baos中int options = ;while (baos.toByteArray().length / > ) { // 循环判断如果压缩后图片是否大于kb,大于继续压缩baos.reset();// 重置baos即清空baosimage.compress(Bitmap.CompressFormat.JPEG, options, baos);// 这里压缩options%，把压缩后的数据存放到baos中options -= ;// 每次都减少}ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());// 把压缩后的数据baos存放到ByteArrayInputStream中Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);// 把ByteArrayInputStream数据生成图片return bitmap;}</span> 

<span style="font-family: comic sans ms,sans-serif; font-size: 16px;">public byte[] Bitmap2Bytes(Bitmap bm) {ByteArrayOutputStream baos = new ByteArrayOutputStream();bm.compress(Bitmap.CompressFormat.PNG, 100, baos);return baos.toByteArray();}</span> 

<span style="font-family: comic sans ms,sans-serif; font-size: px;">/*** 格式化byte* * @param b* @return*/public static String bytehex(byte[] b) {char[] Digit = { '', '', '', '', '', '', '', '', '', '', 'A','B', 'C', 'D', 'E', 'F' };char[] out = new char[b.length * ];for (int i = ; i < b.length; i++) {byte c = b[i];out[i * ] = Digit[(c >>> ) & XF];out[i * + ] = Digit[c & XF];}return new String(out);}</span>

<span style="font-family: comic sans ms,sans-serif; font-size: px;">/*** 反格式化byte* * @param s* @return*/public static byte[] hexbyte(String s) {byte[] src = s.toLowerCase().getBytes();byte[] ret = new byte[src.length / ];for (int i = ; i < src.length; i += ) {byte hi = src[i];byte low = src[i + ];hi = (byte) ((hi >= 'a' && hi <= 'f') ? xa + (hi - 'a'): hi - '');low = (byte) ((low >= 'a' && low <= 'f') ? xa + (low - 'a'): low - '');ret[i / ] = (byte) (hi << | low);}return ret;}</span> 

<span style="font-family: comic sans ms,sans-serif; font-size: px;">public Bitmap BytesBimap(byte[] b) {if (b.length != ) {return BitmapFactory.decodeByteArray(b, , b.length);} else {return null;}}</span>