Android 电子书阅读错误
我试图读取我正在使用的epub文件。我正在尝试链接中给出的相同示例,但是我得到了java.lang.NoClassDefFoundError。我尽力了。即使通过adt、eclipse进行更改,我也无法解决这个问题。请调查一下,给我一些建议Android 电子书阅读错误,android,noclassdeffounderror,epub,Android,Noclassdeffounderror,Epub,我试图读取我正在使用的epub文件。我正在尝试链接中给出的相同示例,但是我得到了java.lang.NoClassDefFoundError。我尽力了。即使通过adt、eclipse进行更改,我也无法解决这个问题。请调查一下,给我一些建议 04-20 15:08:47.735: E/AndroidRuntime(4329): FATAL EXCEPTION: main 04-20 15:08:47.735: E/AndroidRuntime(4329): java.lang.ExceptionI
04-20 15:08:47.735: E/AndroidRuntime(4329): FATAL EXCEPTION: main
04-20 15:08:47.735: E/AndroidRuntime(4329): java.lang.ExceptionInInitializerError
04-20 15:08:47.735: E/AndroidRuntime(4329): at com.sample.pubreader.EPubReaderActivity.onCreate(EPubReaderActivity.java:30)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1780)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1837)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.app.ActivityThread.access$1500(ActivityThread.java:132)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1033)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.os.Handler.dispatchMessage(Handler.java:99)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.os.Looper.loop(Looper.java:143)
04-20 15:08:47.735: E/AndroidRuntime(4329): at android.app.ActivityThread.main(ActivityThread.java:4196)
04-20 15:08:47.735: E/AndroidRuntime(4329): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 15:08:47.735: E/AndroidRuntime(4329): at java.lang.reflect.Method.invoke(Method.java:507)
04-20 15:08:47.735: E/AndroidRuntime(4329): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
04-20 15:08:47.735: E/AndroidRuntime(4329): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
04-20 15:08:47.735: E/AndroidRuntime(4329): at dalvik.system.NativeStart.main(Native Method)
04-20 15:08:47.735: E/AndroidRuntime(4329): Caused by: java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory
04-20 15:08:47.735: E/AndroidRuntime(4329): at nl.siegmann.epublib.epub.EpubReader.<clinit>(EpubReader.java:33)
04-20 15:08:47.735: E/AndroidRuntime(4329): ... 14 more
04-20 15:08:47.735:E/AndroidRuntime(4329):致命异常:main
04-20 15:08:47.735:E/AndroidRuntime(4329):java.lang.ExceptionInInitializeError
04-20 15:08:47.735:E/AndroidRuntime(4329):在com.sample.publeader.EPubReaderActivity.onCreate(EPubReaderActivity.java:30)上
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1780)
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1837)
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.app.ActivityThread.access$1500(ActivityThread.java:132)
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1033)
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.os.Handler.dispatchMessage(Handler.java:99)上
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.os.Looper.loop(Looper.java:143)
04-20 15:08:47.735:E/AndroidRuntime(4329):在android.app.ActivityThread.main(ActivityThread.java:4196)上
04-20 15:08:47.735:E/AndroidRuntime(4329):位于java.lang.reflect.Method.Invokenactive(本机方法)
04-20 15:08:47.735:E/AndroidRuntime(4329):位于java.lang.reflect.Method.invoke(Method.java:507)
04-20 15:08:47.735:E/AndroidRuntime(4329):在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
04-20 15:08:47.735:E/AndroidRuntime(4329):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
04-20 15:08:47.735:E/AndroidRuntime(4329):在dalvik.system.NativeStart.main(本机方法)
04-20 15:08:47.735:E/AndroidRuntime(4329):原因:java.lang.NoClassDefFoundError:org.slf4j.LoggerFactory
04-20 15:08:47.735:E/AndroidRuntime(4329):位于nl.siegmann.epublib.epub.EpubReader.(EpubReader.java:33)
04-20 15:08:47.735:E/AndroidRuntime(4329):。。。14多
尽管我的代码与上面的链接类似,但我也提供了代码
public class EPubReaderActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
AssetManager assetManager = getAssets();
try {
// find InputStream for book
InputStream epubInputStream = assetManager
.open("sample.epub");
// Load Book from inputStream
Book book = (new EpubReader()).readEpub(epubInputStream);
// Log the book's authors
Log.i("epublib", "author(s): " + book.getMetadata().getAuthors());
// Log the book's title
Log.i("epublib", "title: " + book.getTitle());
// Log the book's coverimage property
Bitmap coverImage = BitmapFactory.decodeStream(book.getCoverImage()
.getInputStream());
Log.i("epublib", "Coverimage is " + coverImage.getWidth() + " by "
+ coverImage.getHeight() + " pixels");
// Log the tale of contents
logTableOfContents(book.getTableOfContents().getTocReferences(), 0);
} catch (IOException e) {
Log.e("epublib", e.getMessage());
}
}
private void logTableOfContents(List<TOCReference> tocReferences, int depth) {
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);
}
}
}
公共类EPubReaderActivity扩展活动{
/**在首次创建活动时调用*/
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
AssetManager AssetManager=getAssets();
试一试{
//查找书籍的输入流
InputStream epubInputStream=assetManager
.open(“sample.epub”);
//从inputStream加载图书
BookBook=(新的EpubReader()).readEpub(epubInputStream);
//记录这本书的作者
Log.i(“epublib”,“作者:”+book.getMetadata().getAuthors());
//记录书名
Log.i(“epublib”,“title:+book.getTitle());
//记录书籍的封面图像属性
位图coverImage=BitmapFactory.decodeStream(book.getCoverImage()
.getInputStream());
Log.i(“epublib”,“Coverimage是”+Coverimage.getWidth()+“by”
+coverImage.getHeight()+“像素”);
//记录内容的故事
内容日志表(book.getTableOfContents().gettoReferences(),0);
}捕获(IOE异常){
Log.e(“epublib”,e.getMessage());
}
}
内容的私有void日志表(列表引用,int深度){
if(tocpreferences==null){
返回;
}
for(TOCReference TOCReference:tocReferences){
StringBuilder tocString=新的StringBuilder();
for(int i=0;i
我想你忘了将slf4j android库添加到你的项目中。
如果您查看您提供的链接,它会显示:
入门
确保两个库都在构建路径上。我通过添加另外两个jar文件解决了这个问题 slf4j api和slf4j很简单。slf4j android依赖于我提到的库
谢谢您的帮助。只需将上述两个罐子添加到Libs文件夹中即可。如果Libs文件夹不在项目结构中,请创建一个并添加那些jar。
错误将消失。我已经添加了两个jar文件,但仍然收到相同的错误。请将您的答案更具体一些。请尝试包含详细信息,因为这个答案没有提供足够的细节使其变得有用。我遇到了以下错误:Dex加载程序]无法执行Dex:多个Dex文件定义Lorg/slf4j/impl/StaticLoggerBinder;