Bitmap File path 转换 保存

public void saveBitmapFile(Bitmap bitmap){            File file=new File(ContactService.getImageURI(Environment.getExternalStorageDirectory()+"/pic/01.jpg");//将要保存图片的路径            try {                    BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);                    bos.flush();                    bos.close();            } catch (IOException e) {                    e.printStackTrace();            }}

  /*     * 从网络上获取图片，如果图片在本地存在的话就直接拿，如果不存在再去服务器上下载图片     * 这里的path是图片的地址     */    public static Uri getImageURI(String localPath, String path) throws Exception {        File file = new File(localPath);        // 如果图片存在本地缓存目录，则不去服务器下载        if (file.exists()) {            return Uri.fromFile(file);//Uri.fromFile(path)这个方法能得到文件的URI        } else {            // 从网络上获取图片            URL url = new URL(path);            HttpURLConnection conn = (HttpURLConnection) url.openConnection();            conn.setConnectTimeout(5000);            conn.setRequestMethod("GET");            conn.setDoInput(true);            if (conn.getResponseCode() == 200) {                InputStream is = conn.getInputStream();                FileOutputStream fos = new FileOutputStream(file);                byte[] buffer = new byte[1024];                int len = 0;                while ((len = is.read(buffer)) != -1) {                    fos.write(buffer, 0, len);                }                is.close();                fos.close();                // 返回一个URI对象                return Uri.fromFile(file);            }        }        return null;    }

//BitmapFactory.方法中很多生成bitmap的方法BitmapFactory.decodeFile(filePath, options);