关于 Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_

关于 Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED from 错误原因
当在Android4.4上进行图片的扫描功能开发时一般会使用：sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ Environment.getExternalStorageDirectory()+ picPath)));的广播
但因为Android4.4中限制了系统应用才有权限使用广播通知系统扫描SD卡，所以会报上面的错误。


this.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + Environment.getExternalStorageDirectory())));