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任何人都可以告诉我这个运行时错误背后的原因是什么?Android Logcat错误
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo Caused by: java.lang.InstantiationException
我试图让下面的GitHub的乔Blough的Android PDF浏览器库中的PDF阅读器应用程序:https://github.com/jblough/Android-Pdf-Viewer-Library。我遵循了一切,最终导致了这个错误。
12-20 03:43:14.037: E/AndroidRuntime(29822): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.traininghandouts.app/com.traininghandouts.app.PdfViewer}: java.lang.InstantiationException: com.traininghandouts.app.PdfViewer
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.os.Handler.dispatchMessage(Handler.java:99)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.os.Looper.loop(Looper.java:123)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-20 03:43:14.037: E/AndroidRuntime(29822): at java.lang.reflect.Method.invokeNative(Native Method)
12-20 03:43:14.037: E/AndroidRuntime(29822): at java.lang.reflect.Method.invoke(Method.java:521)
12-20 03:43:14.037: E/AndroidRuntime(29822): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-20 03:43:14.037: E/AndroidRuntime(29822): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-20 03:43:14.037: E/AndroidRuntime(29822): at dalvik.system.NativeStart.main(Native Method)
12-20 03:43:14.037: E/AndroidRuntime(29822): Caused by: java.lang.InstantiationException: com.traininghandouts.app.PdfViewer
12-20 03:43:14.037: E/AndroidRuntime(29822): at java.lang.Class.newInstanceImpl(Native Method)
12-20 03:43:14.037: E/AndroidRuntime(29822): at java.lang.Class.newInstance(Class.java:1429)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
12-20 03:43:14.037: E/AndroidRuntime(29822): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
12-20 03:43:14.037: E/AndroidRuntime(29822): ... 11 more
这里是我的代码:
try{
String path = "mnt/sdcard/android-android-ui-design-patterns.pdf";
Intent intent = new Intent(this, PdfViewer.class);
intent.putExtra(PdfViewerActivity.EXTRA_PDFFILENAME, path);
startActivity(intent);
}catch(Exception e){
e.printStackTrace();
}
我编辑了问题 – agony 2011-12-20 03:53:25
@nhqdualcagony我老实说不知道是什么原因导致问题。你知道哪一行代码导致了这个问题吗?不幸的是,你的Logcat似乎并没有显示问题出在哪里。 – Jakar 2011-12-20 04:59:52
嗯,无法想出它 – agony 2011-12-20 05:07:35