## not allowed to send broadcast android.intent.action.MEDIA_MOUNTED 當我們保存圖片后就會發個通知告訴系統讓sdcard重新掛載，這樣其他程序就會立即找到這張圖片。 ~~~ Intent intent = new Intent(); intent.setAction(Intent.ACTION_MEDIA_MOUNTED); intent.setData(Uri.fromFile(Environment .getExternalStorageDirectory())); sendBroadcast(intent); ~~~ 但是到了Android4.4就不靈了，Google將MEDIA_MOUNTED的權限提高了，于是就報了一個下面的錯誤。 ~~~ W/System.err﹕java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED from pid=18338, uid=10087 ~~~ 在stackoverfollow中找到了一個辦法，在高版本中使用ACTION_MEDIA_SCANNER_SCAN_FILE去通知系統重新掃描文件。代碼如下： ~~~ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { Intent mediaScanIntent = new Intent( Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); Uri contentUri = Uri.fromFile(mPhotoFile); //out is your output file mediaScanIntent.setData(contentUri); CameraActivity.this.sendBroadcast(mediaScanIntent); } else { sendBroadcast(new Intent( Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory()))); } } catch (FileNotFoundException e) { Log.d(TAG, "File not found: " + e.getMessage()); } catch (IOException e) { Log.d(TAG, "Error accessing file: " + e.getMessage()); } ~~~