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PORuntime error: ClassNotFound exception
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  1. PORuntime error: ClassNotFound exception
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    copied!<p>I've been having this runtime error for almost a week and can't find the solution (I'm a new android programmer). Please help me!</p> <p>The log is at the end of this message. I know there are some similar questions to mine but I couldn't find a solution to my problem.</p> <p>I'm trying to call a class from activity using <code>Intent</code> but the runtime error says that this class couldn't be found.</p> <p>This is the log file:</p> <pre><code>07-01 13:22:57.098: E/dalvikvm(1488): Could not find class 'com.XXX.ui.ViewPager', referenced from method com.XXX.ui.MainIWrapper.onCreate 07-01 13:22:57.338: E/AndroidRuntime(1488): FATAL EXCEPTION: main 07-01 13:22:57.338: E/AndroidRuntime(1488): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.XXX/com.XXX.ui.MainIWrapper}: android.view.InflateException: Binary XML file line #43: Error inflating class com.XXX.ui.NavigationBar 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.os.Handler.dispatchMessage(Handler.java:99) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.os.Looper.loop(Looper.java:130) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.ActivityThread.main(ActivityThread.java:3683) 07-01 13:22:57.338: E/AndroidRuntime(1488): at java.lang.reflect.Method.invokeNative(Native Method) 07-01 13:22:57.338: E/AndroidRuntime(1488): at java.lang.reflect.Method.invoke(Method.java:507) 07-01 13:22:57.338: E/AndroidRuntime(1488): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 07-01 13:22:57.338: E/AndroidRuntime(1488): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 07-01 13:22:57.338: E/AndroidRuntime(1488): at dalvik.system.NativeStart.main(Native Method) 07-01 13:22:57.338: E/AndroidRuntime(1488): Caused by: android.view.InflateException: Binary XML file line #43: Error inflating class com.XXX.ui.NavigationBar 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.inflate(LayoutInflater.java:408) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 07-01 13:22:57.338: E/AndroidRuntime(1488): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.Activity.setContentView(Activity.java:1657) 07-01 13:22:57.338: E/AndroidRuntime(1488): at com.XXX.ui.MainIWrapper.onCreate(MainIWrapper.java:69) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 07-01 13:22:57.338: E/AndroidRuntime(1488): ... 11 more 07-01 13:22:57.338: E/AndroidRuntime(1488): Caused by: java.lang.ClassNotFoundException: com.XXX.ui.NavigationBar in loader dalvik.system.PathClassLoader[/data/app/com.XXX- 2.apk] 07-01 13:22:57.338: E/AndroidRuntime(1488): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 07-01 13:22:57.338: E/AndroidRuntime(1488): at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 07-01 13:22:57.338: E/AndroidRuntime(1488): at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.createView(LayoutInflater.java:471) 07-01 13:22:57.338: E/AndroidRuntime(1488): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570) 07-01 13:22:57.338: E/AndroidRuntime(1488): ... 23 more </code></pre> <p>This is the function that deals with the intent:</p> <pre><code>private Activity from; private Class to; public void open() { Intent intent; intent = new Intent(from, to); if (extras != null) { intent.putExtras(extras); } if (to.equals(MainWrapper.class)) { intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); } if (activityForResultRequestCode == -1) { from.startActivity(intent); } else { from.startActivityForResult(intent, activityForResultRequestCode); } if (pendingAnimation != null &amp;&amp; pendingAnimation.length == 2) { from.overridePendingTransition(pendingAnimation[0], pendingAnimation[1]); } else { from.overridePendingTransition(R.anim.slide_in_right, R.anim.hold); } if (toClosePreviousActivity) { from.finish(); } } </code></pre> <p>This is the call <strong>from</strong> the activity (that needs to be changed), with the class I want to load (it uses the <code>open()</code> function that is doing the intent):</p> <p><code>UiUtils.getOpenActivityBuilder(SplashScreen.this,MainIWrapper.class).toClosePrev(true).open;</code></p> <p>This is a part of my manifest -- it's the main activity that needs to be changed to the class <code>MainIWrapper</code>:</p> <pre><code>&lt;activity android:name=".ui.SplashScreen" android:configChanges="orientation" android:screenOrientation="portrait" android:theme="@android:style/Theme.NoTitleBar" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; </code></pre> <p>This is the mainWrapper declaration in the manifest file:</p> <pre><code>&lt;activity android:name=".ui.MainIWrapper" android:configChanges="orientation" android:launchMode="singleTask" android:screenOrientation="portrait" android:theme="@android:style/Theme.NoTitleBar" /&gt; </code></pre> <p>This is the <code>mainWrapper</code> declaration:</p> <pre><code>public class MainIWrapper extends BaseWebSiteScreen implements HasBox {...} </code></pre> <p>And this is the main activity declaration:</p> <pre><code>public class SplashScreen extends Activity {...} </code></pre> <hr> <p>Thank you for the help But i still can't find the problem(I'm really a beginner in android)</p> <p>Those are the lines from my XML(from line 43):</p> <pre><code>&lt;com.XXX.ui.NavigationBar xmlns:vwpgind="http://schemas.android.com/apk/res/com.XXX" android:id="@+id/navigation_bar" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="top" vwpgind:arrowImageSrc="@drawable/common_slider_arrow" vwpgind:hideFirstItem="true" /&gt; </code></pre> <p>the code from MainIWrapper.OnCreate() is:</p> <pre><code>protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_iwrapper); isUserLoggedIn = UserDetails.getInstance(getApplicationContext()).isUserLoggedIn(); //we want to refresh user thumb each time user opens Main iWrapper if (UserDetails.getInstance(getApplicationContext()).isUserLoggedIn()) UserDetails.deleteCachedUserThumb(getApplicationContext()); textBox = (TextBox) findViewById(R.id.text_box); viewPager = (ViewPager) findViewById(R.id.view_pager); pageViewAdapter = new PageViewAdapter(); viewPager.setAdapter(pageViewAdapter); viewPager.setOffscreenPageLimit(NUMBER_OF_PAGES_TO_PRELOAD); navigationBar = (NavigationBar) findViewById(R.id.navigation_bar); topBar = (TopBar) findViewById(R.id.top_bar); progressAnimation = (ImageView) findViewById(R.id.progress_animation); bottomBar = (BottomBar) findViewById(R.id.bottom_bar); } </code></pre> <p>I still can't find the error here. I looked at the build path and the src folder with the com.XXX.ui package in it(this package contains the NavigationBar and the ViewPager classes)</p> <hr> <p>Those are the lines from my XML(from line 43):</p> <pre><code> &lt;com.XXX.ui.NavigationBar xmlns:vwpgind="http://schemas.android.com/apk/res/com.XXX" android:id="@+id/navigation_bar" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="top" vwpgind:arrowImageSrc="@drawable/common_slider_arrow" vwpgind:hideFirstItem="true" /&gt; </code></pre> <p>the code from MainIWrapper.OnCreate() is:</p> <pre><code>protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_iwrapper); isUserLoggedIn = UserDetails.getInstance(getApplicationContext()).isUserLoggedIn(); //we want to refresh user thumb each time user opens Main iWrapper if (UserDetails.getInstance(getApplicationContext()).isUserLoggedIn()) UserDetails.deleteCachedUserThumb(getApplicationContext()); textBox = (TextBox) findViewById(R.id.text_box); viewPager = (ViewPager) findViewById(R.id.view_pager); pageViewAdapter = new PageViewAdapter(); viewPager.setAdapter(pageViewAdapter); viewPager.setOffscreenPageLimit(NUMBER_OF_PAGES_TO_PRELOAD); navigationBar = (NavigationBar) findViewById(R.id.navigation_bar); topBar = (TopBar) findViewById(R.id.top_bar); progressAnimation = (ImageView) findViewById(R.id.progress_animation); bottomBar = (BottomBar) findViewById(R.id.bottom_bar); } </code></pre> <p>I still can't see what is the problem here</p> <pre><code>public class ViewPager extends android.support.v4.view.ViewPager { public ViewPager(Context context) { super(context); } public ViewPager(Context context, AttributeSet attrs) { super(context, attrs); } @Override public Parcelable onSaveInstanceState() { try { return super.onSaveInstanceState(); } catch (Exception e) { return null; } } </code></pre>
 

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