BitMap、Drawable、inputStream及byte[]互转, 将图片进行base64编码后上传到服务器

　　//BitMap  to   inputStream：
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
        InputStream isBm = new ByteArrayInputStream(baos .toByteArray());
     
  // BitMap  to   byte[]：
      Bitmap defaultIcon = BitmapFactory.decodeStream(in);
      ByteArrayOutputStream stream = new ByteArrayOutputStream();
      defaultIcon.compress(Bitmap.CompressFormat.JPEG, 100, stream);
      byte[] bitmapdata = stream.toByteArray();
 // Drawable  to   byte[]：
      Drawable d; // the drawable (Captain Obvious, to the rescue!!!)
      Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
      ByteArrayOutputStream stream = new ByteArrayOutputStream();
      defaultIcon.compress(Bitmap.CompressFormat.JPEG, 100, bitmap);
      byte[] bitmapdata = stream.toByteArray();
     
  //byte[]  to  Bitmap ：
      Bitmap bitmap =BitmapFactory.decodeByteArray(byte[], 0,byte[].length);

 将图片base64编码,提交图片到服务器

/**
     * 通过Base32将Bitmap转换成Base64字符串,上传图片到服务器
     */
    public static String Bitmap2StrByBase64(Bitmap bit) {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bit.compress(CompressFormat.JPEG, 40, bos);// 参数100表示不压缩
        try {
            bos.flush();
            bos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        byte[] bytes = bos.toByteArray();
        return Base64.encodeToString(bytes, Base64.DEFAULT);
    }

 图片的压缩:   http://blog.csdn.net/harryweasley/article/details/51955467