How to render a epub file in a native android app?

Question

I am trying to make a android app that would render a .epub file and display its content in an android layout.

I did a similar app for displaying pdf\'s using pdfRendere

Answer 1

You can learn from PageTurner Reader and epub3reader

For a simple way you can use WebView with Navigator and NavigatorEventListener from nl.siegmann.epublib.browsersupport package. Though WebView is not a 'native' one.

Here the steps:

1. Implement the NavigatorEventListener in your class.

2. Initialize Navigator like the following snippet:

   private void init() {
     mNavigator = new Navigator();
     mNavigator.addNavigationEventListener(this);
     mNavigator.gotoBook(book, this); // book is from your loaded InputStream book
     mNavigator.gotoFirstSpineSection(this);
   }
   

3. In your implemented NavigationPerformed add like this:

   @Override public void navigationPerformed(NavigationEvent navigationEvent) {
     if (navigationEvent.isResourceChanged()) {
       int currentSpinePos = navigationEvent.getCurrentSpinePos();
       displayPage(navigationEvent.getCurrentResource(), currentSpinePos);navigationEvent.getCurrentResource().toString());
     }
   }
   

4. Add displayPage method to show epub:

   private void displayPage(Resource resource, int sectionPos) {
     if (resource == null) {
       return;
     }
     try {
        mWebView.loadDataWithBaseURL("file:///android_asset/data/", data, "text/html", "UTF-8", null);
     } catch (Exception e) {
        Log.d(TAG, "When reading resource "
        + resource.getId()
        + "("
        + resource.getHref()
        + ") :"
        + e.getMessage(), e);
     }
   }
   

5. Finish.