title: Loading images from internal storage kivy python
body: <p>I am looking for a solution regarding loading images from internal storage file manager via my kivy application.</p>
  
  <p>for testing,i need to select the image from internal storage and then convert it into gray scale image by using opencv.</p>
  
  <p>I have tried filechooserlistview,but however i could not access my internal storage.</p>
  
  <p>I have also added below mentioned line in my buildozer.spec file.
               android.permissions = READ_EXTERNAL_STORAGE,WRITE_EXTERNAL_STORAGE</p>
  
  <p>i'm searching for this solution for the last two days but i didn't get any proper result yet.</p>
  
  <p>Please share the code if anything you have.
  Thanks in advance</p>