android - I am getting ClassNotFoundException, in log cat? why? -


for project java classes in 1 package - com.example.android.bitmapfun - , manifest is: 

  <manifest xmlns:android="http://schemas.android.com/apk/res/android"   package="com.example.android.bitmapfun"   android:versioncode="1"   android:versionname="1.0" >  <uses-sdk     android:minsdkversion="15"     android:targetsdkversion="15" />  <uses-permission android:name="android.permission.internet" /> <uses-permission android:name="android.permission.write_external_storage" /> <uses-permission android:name="android.permission.access_network_state" />  <application     android:description="@string/app_description"     android:hardwareaccelerated="true"     android:icon="@drawable/ic_launcher"     android:label="@string/app_name" >      <activity         android:name="com.example.android.bitmapfun.imagegridactivity"         android:label="@string/app_name"         android:theme="@style/apptheme" >         <intent-filter>             <action android:name="android.intent.action.main" />             <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity>     <activity         android:name="com.example.android.bitmapfun.imagedetailactivity"         android:label="@string/app_name"         android:theme="@style/apptheme.fullscreen" >     </activity> </application> </manifest>

and activities are:

   package com.example.android.bitmapfun;   import android.os.bundle;  import android.support.v4.app.fragmentactivity;  import android.support.v4.app.fragmenttransaction;     public class imagegridactivity extends fragmentactivity {   private static final string tag = "imagegridfragment";   @override   protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      if (getsupportfragmentmanager().findfragmentbytag(tag) == null) {         final fragmenttransaction ft = getsupportfragmentmanager().begintransaction();         ft.add(android.r.id.content, new imagegridfragment(), tag);         ft.commit();     }   }   }

imagedeatilactivity.java:

  package com.example.android.bitmapfun;   import android.annotation.suppresslint;  import android.app.actionbar;  import android.content.intent;  import android.os.bundle;  import android.support.v4.app.fragment;  import android.support.v4.app.fragmentactivity;  import android.support.v4.app.fragmentmanager;  import android.support.v4.app.fragmentstatepageradapter;  import android.support.v4.view.viewpager;  import android.util.displaymetrics;  import android.view.menu;  import android.view.menuinflater;  import android.view.menuitem;  import android.view.view;  import android.view.view.onclicklistener;  import android.view.viewgroup;  import android.view.windowmanager.layoutparams;  import android.widget.toast;   import com.example.android.bitmapfun.r;  import com.example.android.bitmapfun.images;  import com.example.android.bitmapfun.disklrucache;  import com.example.android.bitmapfun.imagecache;  import com.example.android.bitmapfun.imagefetcher;  import com.example.android.bitmapfun.imageresizer;  import com.example.android.bitmapfun.imageworker;  import com.example.android.bitmapfun.utils;   public class imagedetailactivity extends fragmentactivity implements onclicklistener { private static final string image_cache_dir = "images"; public static final string extra_image = "extra_image";  private imagepageradapter madapter; private imageresizer mimageworker; private viewpager mpager;  @suppresslint("newapi") @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.image_detail_pager);  ..... }

logcat: here

why logcat showing classnotfoundexception here? tried can't clear error. please ideas overcome problem.

to use fragmentactivity class, application must specify api level "11" or higher in manifest , compiled against version of android library supports equal or higher api level.


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