Androidpdfviewer: Blank activity

[agarcialeon]

I've added the widget to my layout as:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.es.creativitic.caf.PdfViewer">

    <com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</android.support.constraint.ConstraintLayout>

And in my activity I load the pdf file from the assets folder like this:

import com.github.barteksc.pdfviewer.PDFView;

public class PdfViewer extends AppCompatActivity
{
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pdf_viewer);

        PDFView viewer = (PDFView) findViewById(R.id.pdfView);

        Log.d("PdfViewer", "It worked!");
        viewer.fromAsset("Android SQLite Essentials.pdf");
    }
}

But when I run the app, it enters the activity but just the action bar appears and the rest of the layout remains white.

There is any problem with the code or I just missed something in the documentation?
Thanks

[agarcialeon]

I've solved the issue. I was missing the load() method.

[Sp4Rx]

Can you please elaborate how you solved it? @agarcialeon