android - Invalid URI after closing calling Activity -

i have activity multiple imageviews showing images retrieved calling camera intent. on onactivityresult store image uri returned later background processing.

the thing is: once finish calling activity, of stored uris (passed asynctask) invalid , when try load them (i.e. glide), raise nullpointerexception.

i can't keep activity running during background processing, takes time , gives users bad experience.

i've tried other methods when acquiring images thinking read permission availability , life cycle have calling method (created myself file in file system , passed camera intent, example), none of worked.

i've tried different devices , different android version , issue persists, , implicit pattern of android?

has of experienced problem?

tha camera , gallery intent calls:

    public static void getcameraimage(activity activity) {     intent takepictureintent = new intent(mediastore.action_image_capture);     if (takepictureintent.resolveactivity(activity.getpackagemanager()) != null) {         activity.startactivityforresult(takepictureintent, codes.camera_image);     } }  public static void getgalleryimage(activity activity){     intent intent = new intent(intent.action_get_content);     intent.settype("image/*");     intent.addcategory(intent.category_openable);     activity.startactivityforresult(intent, codes.gallery_image); } 

onactivityresult:

@override public void onactivityresult(int requestcode, int resultcode, intent intent) {     if (resultcode == result_ok &&             (requestcode == codes.camera_image || requestcode == codes.gallery_image)) {          uri uri = intent.getdata();          glide.with(this)                 .load(uri)                 .fitcenter()                 .centercrop()                 .into((imageview) findviewbyid(myimageviewid));          saveduri = uri;                 } } 

asynctask call:

//postimages extends asynctask postimages post = new postvehicleimages(saveduri); post.execute(); finish() 

async task execution:

@override protected void doinbackground(void... params) {      callservice(saveduri);      return null; }  private void callservice(uri saveduri) {      bitmap image = null;     try{         image = glide.with(app.getappcontext())                 .load(saveduri) //<----- crashes here                 .asbitmap()                 .into(640, 640)                 .get();     }catch(exception e){         e.printstacktrace();     }      retrofit retrofit = servicebuilder.getbuilder();      bytearrayoutputstream stream = new bytearrayoutputstream();     image.compress(bitmap.compressformat.jpeg, 100, stream);     byte[] bytearray = stream.tobytearray();      requestbody file = requestbody.create(mediatype.parse("image/jpeg"), bytearray);     vehicleservice service = retrofit.create(vehicleservice.class);      call<void> call = service.sendimage(credentials, vehicleid, index, file);      try {         call.execute();     } catch (ioexception e) {         e.printstacktrace();     }  } 

i call postimages after validate uri , user press button (send). asynctask receives uri, loads , sends webserver, asynctask.

i simplified little (when call asynctask pass 4 uris it), 1 or 2 sent correctly, never of them successful, raises nullpointerexception when loading bitmap uri @ statement .load(saveduri).

i've tried using pointed file path, apparently depends heavily on sdk version / device, , wields problems.