how to pick and select a .pdf file from internal and external storage in android device and show the file in text view

Question

i use below code for select pdf file but it not shows the pdf file.

following is request code.

 if (requestCode == 3) {
     String FilePath = data.getData().getPath();
     String FileName = data.getData().getLastPathSegment();
     int lastPos = FilePath.length() - FileName.length();
     String Folder = FilePath.substring(0, lastPos);

     // textFile.setText("Full Path: \n" + FilePath + "\n");
     //textFolder.setText("Folder: \n" + Folder + "\n");
     //textFileName.setText("File Name: \n" + FileName + "\n");
 }

on button click.

  Intent intent = new Intent();
  intent.setAction(Intent.ACTION_GET_CONTENT);
  intent.setType("application/pdf");
  startActivityForResult(intent,3);