public class EpubReaderMainActivity extends Activity {
/** Called when the activity is first created. */
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main );
TextView tv = (TextView)findViewById(R.id.text);
AssetManager am = getAssets();
try{
InputStream bookData = am.open("books/bookTest.epub");
Book book = (new EpubReader()).readEpub(bookData);
Log.i("epublib", "author(s): " + book.getMetadata().getAuthors());
Log.i("epublib", "title: " + book.getTitle());
Bitmap coverImage = BitmapFactory.decodeStream(book.getCoverImage()
.getInputStream());
Log.i("epublib", "Coverimage is " + coverImage.getWidth() + " by "
+ coverImage.getHeight() + " pixels");
logTableOfContents(book.getTableOfContents().getTocReferences(), 0);
}
catch (IOException e) {
// TODO: handle exception
e.printStackTrace();
}
try{
// read epub file
EpubReader epubReader = new EpubReader();
Book book = epubReader.readEpub(new FileInputStream("mybook.epub"));
// print the first title
List<String> titles = book.getMetadata().getTitles();
String a = ("book title:" + (titles.isEmpty() ? "book has no title" : titles.get(0)));
tv.setText(a);
}
catch (IOException e) {
// TODO: handle exception
e.printStackTrace();
}
}
private void logTableOfContents(List<TOCReference> tocReferences, int depth) {
// TODO Auto-generated method stub
if (tocReferences == null) {
return;
}
for (TOCReference tocReference : tocReferences) {
StringBuilder tocString = new StringBuilder();
for (int i = 0; i < depth; i++) {
tocString.append("\t");
}
tocString.append(tocReference.getTitle());
Log.i("epublib", tocString.toString());
logTableOfContents(tocReference.getChildren(), depth + 1);
}
}
}
Stacktrace
11-21 10:51:19.570: I/AndroidLoggerFactory(325): Logger name 'nl.siegmann.epublib.epub.EpubReader' exceeds maximum length of 23 characters, using 'n*.s*.e*.e*.EpubReader' instead.
11-21 10:51:19.780: D/dalvikvm(325): GC_CONCURRENT freed 1136K, 56% free 2984K/6727K, external 2002K/2137K, paused 3ms+3ms
11-21 10:51:19.790: I/AndroidLoggerFactory(325): Logger name 'nl.siegmann.epublib.epub.EpubProcessorSupport' exceeds maximum length of 23 characters, using 'n*.s*.e*.e*.EpubProces*' instead.
11-21 10:51:19.830: I/AndroidLoggerFactory(325): Logger name 'nl.siegmann.epublib.epub.PackageDocumentReader' exceeds maximum length of 23 characters, using 'n*.s*.e*.e*.PackageDoc*' instead.
11-21 10:51:19.929: I/AndroidLoggerFactory(325): Logger name 'nl.siegmann.epublib.epub.NCXDocument' exceeds maximum length of 23 characters, using 'n*.s*.e*.e*.NCXDocument' instead.
11-21 10:51:19.980: I/epublib(325): author(s): [Haynes, Carrie James]
11-21 10:51:19.980: I/epublib(325): title: Whispers of a Legend - Part One - Shadows of the Past
11-21 10:51:19.980: D/AndroidRuntime(325): Shutting down VM
11-21 10:51:19.980: W/dalvikvm(325): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-21 10:51:19.990: E/AndroidRuntime(325): FATAL EXCEPTION: main
11-21 10:51:19.990: E/AndroidRuntime(325): java.lang.RuntimeException: Unable to start activity ComponentInfo{epub.reader/epub.reader.EpubReaderMainActivity}: java.lang.NullPointerException
11-21 10:51:19.990: E/AndroidRuntime(325): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.os.Handler.dispatchMessage(Handler.java:99)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.os.Looper.loop(Looper.java:123)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.app.ActivityThread.main(ActivityThread.java:3683)
11-21 10:51:19.990: E/AndroidRuntime(325): at java.lang.reflect.Method.invokeNative(Native Method)
11-21 10:51:19.990: E/AndroidRuntime(325): at java.lang.reflect.Method.invoke(Method.java:507)
11-21 10:51:19.990: E/AndroidRuntime(325): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-21 10:51:19.990: E/AndroidRuntime(325): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-21 10:51:19.990: E/AndroidRuntime(325): at dalvik.system.NativeStart.main(Native Method)
11-21 10:51:19.990: E/AndroidRuntime(325): Caused by: java.lang.NullPointerException
11-21 10:51:19.990: E/AndroidRuntime(325): at epub.reader.EpubReaderMainActivity.onCreate(EpubReaderMainActivity.java:43)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-21 10:51:19.990: E/AndroidRuntime(325): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
11-21 10:51:19.990: E/AndroidRuntime(325): ... 11 more
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="epub.reader"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".EpubReaderMainActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
I have been trying for a while but I am stuck.
Here is what I tried I checked the Epublib packages if there is any requirement of a permission in order to run the activity. What this activity does is log in the .epub file and read just the first title since I am testing out their code.
Study the trace carefully: towards the bottom you have
Check your
onCreatemethod, line 43 in the activity class file, whichever that is 🙂