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保存Bitmap 到存储卡(SD卡) 并通知文件管理器 更新

private void saveImage(Bitmap bitmap) {        //此处范围的所谓外部存储是手机的自带内存32G,64G，并不是SD卡，是否有访问权限        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {            File newFileDir = new File(Environment.getExternalStorageDirectory(), "Download");            if (!newFileDir.exists()) {                newFileDir.mkdir();            }            String fileName = System.currentTimeMillis() + ".png";            File file = new File(newFileDir, fileName);            //打开文件输出流            FileOutputStream os = null;            try {                os = new FileOutputStream(file);                bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);                os.flush();                os.close();            } catch (FileNotFoundException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }//            // 保存到图库//            try {//                MediaStore.Images.Media.insertImage(getContentResolver(), file.getAbsolutePath(), fileName, null);//            } catch (FileNotFoundException e) {//                e.printStackTrace();//            }////            //通知更新图库//            Uri uri = Uri.parse("file://" + Environment.getExternalStorageDirectory());//            Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri);//            sendBroadcast(intent);            MediaScannerConnection.scanFile(this,                    new String[] { file.toString() }, null,                    new MediaScannerConnection.OnScanCompletedListener() {                        public void onScanCompleted(String path, Uri uri) {                            Log.i("ExternalStorage", "Scanned " + path + ":");                            Log.i("ExternalStorage", "-> uri=" + uri);                        }                    });        }    }

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