Can I create a DocumentFile with a stored Uri?











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I got a Uri using the following method.



Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
startActivityForResult(intent, MY_REQUEST_CODE);


like:



content://com.android.externalstorage.documents/tree/primary%3A


Can I store this string to create a DocumentFile in application startup?
like:



DocumentFile.fromUri(this,Uri.pasre(str))


It works on Android 6.0,but it seems invalid in higher version.
Or I should get Uri every time I start it?
I have found that some file managers do not need to get Uri via startActivityForResult(). Like RE. Are they using the shell to get a list under /storage and then stitching them into Uri?



Then use grantUriPermission() and takePersistableUriPermission() to get Uri permissions?



Sorry, my English is too bad. TT










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    up vote
    0
    down vote

    favorite












    I got a Uri using the following method.



    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
    startActivityForResult(intent, MY_REQUEST_CODE);


    like:



    content://com.android.externalstorage.documents/tree/primary%3A


    Can I store this string to create a DocumentFile in application startup?
    like:



    DocumentFile.fromUri(this,Uri.pasre(str))


    It works on Android 6.0,but it seems invalid in higher version.
    Or I should get Uri every time I start it?
    I have found that some file managers do not need to get Uri via startActivityForResult(). Like RE. Are they using the shell to get a list under /storage and then stitching them into Uri?



    Then use grantUriPermission() and takePersistableUriPermission() to get Uri permissions?



    Sorry, my English is too bad. TT










    share|improve this question









    New contributor




    nolizemin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I got a Uri using the following method.



      Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
      startActivityForResult(intent, MY_REQUEST_CODE);


      like:



      content://com.android.externalstorage.documents/tree/primary%3A


      Can I store this string to create a DocumentFile in application startup?
      like:



      DocumentFile.fromUri(this,Uri.pasre(str))


      It works on Android 6.0,but it seems invalid in higher version.
      Or I should get Uri every time I start it?
      I have found that some file managers do not need to get Uri via startActivityForResult(). Like RE. Are they using the shell to get a list under /storage and then stitching them into Uri?



      Then use grantUriPermission() and takePersistableUriPermission() to get Uri permissions?



      Sorry, my English is too bad. TT










      share|improve this question









      New contributor




      nolizemin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I got a Uri using the following method.



      Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
      startActivityForResult(intent, MY_REQUEST_CODE);


      like:



      content://com.android.externalstorage.documents/tree/primary%3A


      Can I store this string to create a DocumentFile in application startup?
      like:



      DocumentFile.fromUri(this,Uri.pasre(str))


      It works on Android 6.0,but it seems invalid in higher version.
      Or I should get Uri every time I start it?
      I have found that some file managers do not need to get Uri via startActivityForResult(). Like RE. Are they using the shell to get a list under /storage and then stitching them into Uri?



      Then use grantUriPermission() and takePersistableUriPermission() to get Uri permissions?



      Sorry, my English is too bad. TT







      android documentfile






      share|improve this question









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      nolizemin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share|improve this question









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      edited Nov 7 at 7:07





















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      asked Nov 7 at 6:21









      nolizemin

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