Customize the Document Viewer UI in Xamarin.Android

The theme of PdfViewCtrlTabHostFragment2 can be set by calling the following method when creating the fragment using ViewerBuilder2:

// Add a viewer fragment to the layout container in the specified 
// activity, and returns the added fragment
public PdfViewCtrlTabHostFragment2 addViewerFragment(
        int fragmentContainer,
        AppCompatActivity activity,
        Android.Net.Uri fileUri,
        String password,
        int customTheme)
{

    // Create the viewer fragment
    PdfViewCtrlTabHostFragment2 fragment =
            ViewerBuilder2.WithUri(fileUri, password)
                    // Add custom theme here
                    .UsingTheme(customTheme)
                    .Build(activity) as PdfViewCtrlTabHostFragment2;

    // Add the fragment to the layout fragment container
    activity.SupportFragmentManager.BeginTransaction()
            .Replace(fragmentContainer, fragment)
            .Commit();

    return fragment;
}

Theme supplied to ViewerBuilder2.usingTheme(int) is recommended to extend PDFTronAppThemeBase. If you cannot extend PDFTronAppThemeBase and is extending an AppCompat theme, then you will need to define custom theme attributes for the theme to work properly. Custom attributes are listed in the table below. PDFTronAppThemeBase contains a number of attributes which can be used to define the style for certain UI components. A full list of theme attributes can be found below:

A full list of attributes can be found in the styles.xml file in the Apryse Android SDK Tools package.

The built-in default toolbars can be customized using the ViewerConfig and ToolManagerBuilder classes. To hide a specific toolbar, call ViewerConfig.Builder.hideToolbars(String[]) with the toolbar's tag. For example to hide the annotate toolbar:

ViewerConfig.Builder builder = new ViewerConfig.Builder()
        .HideToolbars(
                new String[]{
                        DefaultToolbars.TagAnnotateToolbar
                }
        );

To hide certain tool buttons, you can disable tool modes using ToolManagerBuilder as described in this guide.

The options toolbar can be customized using a similar method as described in this guide, however the ViewerBuilder2 class will be used instead of ViewerBuilder.