安卓7.0媒体库不刷新，有没有大牛指点一下

Question

最近在做下载，下载后立即刷新媒体库，通过广播刷新，在6.0之前广播刷新都是可行的，
换了7.0测试时发现不能即时刷新
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
//扫描单个文件夹
Intent mediaScanIntent = new Intent(
Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "HIFI music" + File.separator + "download")); //out is your output file
mediaScanIntent.setData(contentUri);
getActivity().sendBroadcast(mediaScanIntent);
} else {
//扫描SD卡
getActivity().sendBroadcast(new Intent(
Intent.ACTION_MEDIA_MOUNTED,
Uri.parse(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "HIFI music" + File.separator + "download")));
}
求大神解答一下

Answer 1

应该是没有权限了，6.0后需要动态申请权限，包括读写权限，不能只配置到manifest中，可以使用以下代码判断下是否有读写权限

    if (ContextCompat.checkSelfPermission(PersonInforActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
                            != PackageManager.PERMISSION_GRANTED||ContextCompat.checkSelfPermission(PersonInforActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE)
                            != PackageManager.PERMISSION_GRANTED) { 请求权限｝