title: pdfVIew doesn't work on my kotlin development environment
body: <p>I put some pdf files to test pdf loading from external storage and made a code following :</p>
  <p><a href="https://i.stack.imgur.com/8sT06.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8sT06.png" alt="enter image description here" /></a></p>
  <p>The code is :</p>
  <pre><code>val main_path = &quot;/storage/emulated/0/&quot;
  val dl_path = Environment.DIRECTORY_DOWNLOADS
  val filename = &quot;GLCIC.pdf&quot;
  val filename2 = &quot;edge.pdf&quot;
  private val img_path = Environment.DIRECTORY_DCIM
  private val mv_path = Environment.DIRECTORY_MOVIES
  
  override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
  
      if(checkPermission(Storage_Permission,Flag_Permission_storage)){
          Log.d(&quot;check&quot;,&quot;Permission Granted&quot;)
      }
  
  
      val intent = Intent(this,ViewActivity::class.java)
      val intent_store = Intent(this,ViewActivity::class.java)
      btn1.setOnClickListener {
          intent.putExtra(&quot;pressed&quot;,&quot;asset&quot;)
          startActivity(intent) }
  
      btn2.setOnClickListener {
          intent_store.putExtra(&quot;pdf&quot;,main_path+dl_path+&quot;/&quot;+filename2)
          startActivity(intent_store)
  </code></pre>
  <p>This is a code in mainActivity and pressing btn2 will pass an Intent to viewActivity.</p>
  <pre><code>val pressed2 = intent.getStringExtra(&quot;pdf&quot;)
      Log.d(&quot;1&quot;,&quot;112:&quot;+pressed2.toString())
      if(!TextUtils.isEmpty(pressed2))
      {
          Log.d(&quot;1&quot;,&quot;11:&quot;+pressed2.toString())
          val pdf_file = File(pressed2)
          pdfview.fromFile(pdf_file)
      }
  </code></pre>
  <p>This is code in viewActivity.</p>
  <p>This code made a log :</p>
  <pre><code>D/1: 112:/storage/emulated/0/Download/edge.pdf
  11:/storage/emulated/0/Download/edge.pdf
  </code></pre>
  <p>Judging from the log I don't think that I made any mistake, but the pdfview did not work, showing the white screen .</p>
  <p>Please somebody tell me where I made mistake. I really want to load a file, or make a list of files in a directory. But I am mazed for few weeks.</p>