title: Unable to open pdf client on button click
body: <p>Here is my button click code:</p>
  
  <pre><code>    private View.OnClickListener onButton1=new View.OnClickListener() {
         public void onClick(View v){
          copyAssets();
  
          File rootDir = Environment.getExternalStorageDirectory();
          File file = new File(rootDir + "/sdcard/" +"save.pdf");
           if(file.exists())
             {
              // do action here
  
              Intent intent = new Intent(Intent.ACTION_VIEW, Uri.fromFile(file));
              intent.setType("application/pdf");
  
              startActivity(intent);
             }
           else {
              Toast.makeText(getApplicationContext(), "File does not exist",         Toast.LENGTH_LONG).show();
           }
  
         }
       };
  </code></pre>
  
  <p>copyAssets() is a function by which I copy the file from my assets folder to my SD-Card and it is working as I checked on my device, but I am unable to open it when I click the button. My file is named as save.pdf on the SD-Card</p>