java - Unable to instantiate activity- ClassNotFoundException -

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my android application throws classnotfoundexception exception.

this code in mainactivity.java:

    package pl.advancedsoftware.manga;     public class mainactivity extends fragmentactivity {     viewpager viewpager;      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         requestwindowfeature(window.feature_indeterminate_progress);         setcontentview(r.layout.activity_main);         favourites.context= getapplicationcontext();         sectionspageradapter sectionspageradapter = new sectionspageradapter(getsupportfragmentmanager());         viewpager= (viewpager)findviewbyid(r.id.pager);         viewpager.setadapter(sectionspageradapter);      }      @override        public boolean oncreateoptionsmenu(menu menu) {       //  getmenuinflater().inflate(r.menu.activity_main, menu);         return true;     } }

in androidmanifest.xml:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="pl.advancedsoftware.manga"     android:versioncode="1"     android:versionname="1.0" >      <uses-sdk         android:minsdkversion="8"         android:targetsdkversion="15" />       <uses-permission android:name="android.permission.internet" />      <application         android:icon="@drawable/ic_launcher"         android:label="@string/app_name"         android:theme="@style/apptheme" >         <activity             android:name="pl.advancedsoftware.manga.mainactivity"             android:label="@string/title_activity_main" >             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity>         <activity             android:name="pl.advancedsoftware.manga.bookactivity"              android:label="books" />         <activity             android:name="pl.advancedsoftware.manga.episodeactivity"             android:label="epsiode" />     </application>  </manifest>

my exception is:

> 04-25 12:28:08.868: e/androidruntime(898): fatal exception: main 04-25 > 12:28:08.868: e/androidruntime(898): java.lang.runtimeexception: > unable instantiate activity > componentinfo{pl.advancedsoftware.manga/pl.advancedsoftware.manga.mainactivity}: > java.lang.classnotfoundexception: didn't find class > "pl.advancedsoftware.manga.mainactivity" on path: > /data/app/pl.advancedsoftware.manga-1.apk 04-25 12:28:08.868: > e/androidruntime(898):    @ > android.app.activitythread.performlaunchactivity(activitythread.java:2106) > 04-25 12:28:08.868: e/androidruntime(898):    @ > android.app.activitythread.handlelaunchactivity(activitythread.java:2230) > 04-25 12:28:08.868: e/androidruntime(898):    @ > android.app.activitythread.access$600(activitythread.java:141) 04-25 > 12:28:08.868: e/androidruntime(898):  @ > android.app.activitythread$h.handlemessage(activitythread.java:1234) > 04-25 12:28:08.868: e/androidruntime(898):    @ > android.os.handler.dispatchmessage(handler.java:99) 04-25 > 12:28:08.868: e/androidruntime(898):  @ > android.os.looper.loop(looper.java:137) 04-25 12:28:08.868: > e/androidruntime(898):    @ > android.app.activitythread.main(activitythread.java:5041) 04-25 > 12:28:08.868: e/androidruntime(898):  @ > java.lang.reflect.method.invokenative(native method) 04-25 > 12:28:08.868: e/androidruntime(898):  @ > java.lang.reflect.method.invoke(method.java:511) 04-25 12:28:08.868: > e/androidruntime(898):    @ > com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:793) > 04-25 12:28:08.868: e/androidruntime(898):    @ > com.android.internal.os.zygoteinit.main(zygoteinit.java:560) 04-25 > 12:28:08.868: e/androidruntime(898):  @ > dalvik.system.nativestart.main(native method) 04-25 12:28:08.868: > e/androidruntime(898): caused by: java.lang.classnotfoundexception: > didn't find class "pl.advancedsoftware.manga.mainactivity" on path: > /data/app/pl.advancedsoftware.manga-1.apk 04-25 12:28:08.868: > e/androidruntime(898):    @ > dalvik.system.basedexclassloader.findclass(basedexclassloader.java:65) > 04-25 12:28:08.868: e/androidruntime(898):    @ > java.lang.classloader.loadclass(classloader.java:501) 04-25 > 12:28:08.868: e/androidruntime(898):  @ > java.lang.classloader.loadclass(classloader.java:461) 04-25 > 12:28:08.868: e/androidruntime(898):  @ > android.app.instrumentation.newactivity(instrumentation.java:1054) > 04-25 12:28:08.868: e/androidruntime(898):    @ > android.app.activitythread.performlaunchactivity(activitythread.java:2097) > 04-25 12:28:08.868: e/androidruntime(898):    ... 11 more

i see can wrong path, /data/app/pl.advancedsoftware.manga-1.apk dont know. want project stop working after clone them repository.

check inheriting android.support.v4.app.fragment instead of android.app.fragment.


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