Could not find table of contents resource. in android while reading epub content

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http://stackoverflow.com – I am trying to read and display the content of epub in android using public class MainActivity extends Activity { WebView webview; String line, line1 = "", finalstr = ""; int i = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); webview = (WebView) findViewById(R.id.tv); AssetManager assetManager = getAssets(); try { InputStream epubInputStream = assetManager .open("life.epub"); Book book = (new EpubReader()).readEpub(epubInputStream); // Log t (HowTos)