可以在Android Nougat上刷新Media Store吗？

我已经将app-private文件夹中的文件复制到了Pictures或者DCIM我想在我的应用程序中打开库窗口小部件并显示这些图像.但是,我的gallery小部件使用MediaStore id创建了一个缩略图库,并且新添加的图像不会出现在那里.

我尝试了stackoverflow上建议的所有三个解决方案,以刷新媒体存储并告诉android有关新文件的存在

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, - 禁止在较新的API中使用

2.

MediaScannerConnection.scanFile(context, 
new String[]{ pathToFile1, pathToFile2 }, 
null, // tried also with a String[] with the mimetype, no difference 
new MediaScannerConnectionClient()
{
    public void onMediaScannerConnected(){
    }
    public void onScanCompleted(String path, Uri uri){
        // URI is null, and the gallery doesn't display the image
    }
});

3.

public static void scanFile(Context context, String path, String mimeType ) {
    Client client = new Client(path, mimeType);
    MediaScannerConnection connection =
            new MediaScannerConnection(context, client);
    client.connection = connection;
    connection.connect();
}

private static final class Client implements MediaScannerConnectionClient {
    private final String path;
    private final String mimeType;
    MediaScannerConnection connection;

    public Client(String path, String mimeType) {
        this.path = path;
        this.mimeType = mimeType;
    }

    @Override
    public void onMediaScannerConnected() {
        connection.scanFile(path, mimeType);
    }

    @Override
    public void onScanCompleted(String path, Uri uri) {
        connection.disconnect();
    }
}

再次,uri为空

Android为何如此难以执行如此正常的合法行为？如何在牛轧糖中达到这种效果？

编辑:我也试过发送广播 ACTION_MEDIA_SCANNER_SCAN_FILE

我甚至考虑到了这一点:https: //inthecheesefactory.com/blog/how-to-share-access-to-file-with-fileprovider-on-android-nougat/en

所以现在我发送content://而不是file://URI,但仍然没有!

EDIT2:

我试过这个

public static void scheduleJob(Context context) {
  JobScheduler js =
      (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
  JobInfo job = new JobInfo.Builder(
    MY_BACKGROUND_JOB,
    new ComponentName(context, MyJobService.class))
      .setRequiredNetworkType(JobInfo.NETWORK_TYPE_UNMETERED)
      .setRequiresCharging(true)
      .build();
  js.schedule(job);
}

如此处所述

https://developer.android.com/topic/performance/background-optimization.html

但是,当我打开我的画廊时,新的图像不在那里