Android Bitmap保存到相册

     /**
     * 将图片base64数据转化为bitmap
     * @param imgBase64
     */
    public Bitmap base64ToPicture(String imgBase64) {
        byte[] decode = Base64.decode(imgBase64, Base64.DEFAULT);
        Bitmap bitmap = BitmapFactory.decodeByteArray(decode, 0, decode.length);
        return bitmap;
    }



    /**
     * 将图片保存到相册并通知刷新
     */
    public void savePictureToAlbum(Context mContext, Bitmap bitmap) {
        if (bitmap == null) {
            return;
        }
        // 把文件插入到系统图库
        MediaStore.Images.Media.insertImage(mContext.getContentResolver(),bitmap, null, null);
        // 通知图库更新
        mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,
                Uri.parse("file://" + "/sdcard/namecard/")));
    }


    /**
     * 图片bitmap转成base64数据
     *
     * @param bitmap
     * @return
     */
    public String convertIconToString(Bitmap bitmap) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();// outputstream
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
        byte[] appicon = baos.toByteArray();// 转为byte数组
        String bitString = Base64.encodeToString(appicon, Base64.DEFAULT);
        return bitString;
    }