Develop Reference

App crashes on startup on android API 10 but not on API 16 because of Resources$NotFoundException

My app launches and starts fine on my Samsung Galaxy S3 phone running Android 4.1.2, but when I try to test the same app on my Motorola Droid X running Android 2.3.4 the app crashes before anything is even displayed on my Droid X screen.
My LogCat is below. Unfortunately, it does not point me to exactly what part of my code it is failing on, but it seems like something to do with my layout because of these exceptions:
08-09 10:43:39.686: E/AndroidRuntime(3192): FATAL EXCEPTION: main
08-09 10:43:39.686: E/AndroidRuntime(3192): android.view.InflateException: Binary XML file line #11: Error inflating class <unknown>
08-09 10:43:39.686: E/AndroidRuntime(3192): Caused by: java.lang.reflect.InvocationTargetException`
08-09 10:43:39.686: E/AndroidRuntime(3192): Caused by: android.content.res.Resources$NotFoundException:
Resource is not a Drawable (color or path): TypedValue{t=0x2/d=0x10102fd a=-1}
Log Cat:
08-09 10:43:39.686: E/AndroidRuntime(3192): FATAL EXCEPTION: main
08-09 10:43:39.686: E/AndroidRuntime(3192): android.view.InflateException: Binary XML file line #11: Error inflating class <unknown>
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.LayoutInflater.createView(LayoutInflater.java:518)
08-09 10:43:39.686: E/AndroidRuntime(3192): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.LayoutInflater.inflate(LayoutInflater.java:386)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:332)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.AbsListView.obtainView(AbsListView.java:1456)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.ListView.makeAndAddView(ListView.java:1821)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.ListView.fillDown(ListView.java:686)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.ListView.fillFromTop(ListView.java:754)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.ListView.layoutChildren(ListView.java:1670)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.AbsListView.onLayout(AbsListView.java:1286)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.View.layout(View.java:7184)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:702)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.View.layout(View.java:7184)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.View.layout(View.java:7184)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1254)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1130)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.LinearLayout.onLayout(LinearLayout.java:1047)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.View.layout(View.java:7184)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.View.layout(View.java:7184)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.View.layout(View.java:7184)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.ViewRoot.performTraversals(ViewRoot.java:1140)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.os.Handler.dispatchMessage(Handler.java:99)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.os.Looper.loop(Looper.java:130)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.app.ActivityThread.main(ActivityThread.java:3806)
08-09 10:43:39.686: E/AndroidRuntime(3192): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 10:43:39.686: E/AndroidRuntime(3192): at java.lang.reflect.Method.invoke(Method.java:507)
08-09 10:43:39.686: E/AndroidRuntime(3192): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-09 10:43:39.686: E/AndroidRuntime(3192): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-09 10:43:39.686: E/AndroidRuntime(3192): at dalvik.system.NativeStart.main(Native Method)
08-09 10:43:39.686: E/AndroidRuntime(3192): Caused by: java.lang.reflect.InvocationTargetException
08-09 10:43:39.686: E/AndroidRuntime(3192): at java.lang.reflect.Constructor.constructNative(Native Method)
08-09 10:43:39.686: E/AndroidRuntime(3192): at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.LayoutInflater.createView(LayoutInflater.java:505)
08-09 10:43:39.686: E/AndroidRuntime(3192): ... 35 more
08-09 10:43:39.686: E/AndroidRuntime(3192): Caused by: android.content.res.Resources$NotFoundException: Resource is not a Drawable (color or path): TypedValue{t=0x2/d=0x10102fd a=-1}
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.content.res.Resources.loadDrawable(Resources.java:1719)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.view.View.<init>(View.java:1951)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.TextView.<init>(TextView.java:453)
08-09 10:43:39.686: E/AndroidRuntime(3192): at android.widget.TextView.<init>(TextView.java:446)
08-09 10:43:39.686: E/AndroidRuntime(3192): ... 38 more
08-09 10:43:42.201: I/Process(3192): Sending signal. PID: 3192 SIG: 9

Fixed!!
Looking into it more and it looks like it had something to do with the ArrayAdapter as well as my layout. I was using a custom layout (drawer_list_item.xml) for my ArrayAdapter which had some ICS specific code I am guessing, so I just had to remove some lines from that XML file and the app launched fine on Android API 10 (specifically Android 2.3.4). The lines specifically in my layout file that caused problems was:
android:background="?android:attr/activatedBackgroundIndicator"
android:minHeight="?android:attr/listPreferredItemHeightSmall"
Here is the code in my SherlockFragmentActivity that was causing the layout exception/crash:
m_drawerList.setAdapter(new ArrayAdapter<String>(getSupportActionBar().getThemedContext(),R.layout.drawer_list_item, m_drawerNames));
OLD drawer_list_item.xml code:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceListItemSmall"<!-- Deleted line-->
android:gravity="center_vertical"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:textColor="#fff"
android:background="?android:attr/activatedBackgroundIndicator"<!-- Deleted line-->
android:minHeight="?android:attr/listPreferredItemHeightSmall"/> <!-- Deleted line-->
FIXED drawer_list_item.xml code:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:padding="16dp"
android:textColor="#fff" />

Are you using ActionBarSherlock or HoloEverywhere? I've experienced this problem a lot when using those libraries and trying to style/theme things.
Basically, some attributes are specified by default in ICS+, but are not specified in older versions of android. So, you have to mirror resources, as shown here:
http://actionbarsherlock.com/theming.html
Posting your code for the themes/styles might be helpful for us to see whats wrong.

Without more code I cannot tell you exactly why the app is failing. All we know is that you might use some feature available only for higher APIs. Post your xml-layouts and maybe your classes.
However, try to include the Support Library. That often solves the problem.

Runtime error while launching facebook android app

I was following the tutorial given at https://developers.facebook.com/docs/getting-started/facebook-sdk-for-android/3.0/
While trying to create the Android Project with Facebook login as given in section 6, I am stuck with the following error as shown in LogCat:
08-09 15:48:56.556: I/dalvikvm(378): Could not find method com.facebook.Session.getActiveSession, referenced from method com.example.myfirstandroidapplication.MainActivity.onActivityResult
08-09 15:48:56.576: W/dalvikvm(378): VFY: unable to resolve static method 27: Lcom/facebook/Session;.getActiveSession ()Lcom/facebook/Session;
08-09 15:48:56.576: D/dalvikvm(378): VFY: replacing opcode 0x71 at 0x0003
08-09 15:48:56.576: D/dalvikvm(378): VFY: dead code 0x0006-000a in Lcom/example/myfirstandroidapplication/MainActivity;.onActivityResult (IILandroid/content/Intent;)V
08-09 15:48:56.586: I/dalvikvm(378): Failed resolving Lcom/example/myfirstandroidapplication/MainActivity$1; interface 25 'Lcom/facebook/Session$StatusCallback;'
08-09 15:48:56.586: W/dalvikvm(378): Link of class 'Lcom/example/myfirstandroidapplication/MainActivity$1;' failed
08-09 15:48:56.586: E/dalvikvm(378): Could not find class 'com.example.myfirstandroidapplication.MainActivity$1', referenced from method com.example.myfirstandroidapplication.MainActivity.onCreate
08-09 15:48:56.586: W/dalvikvm(378): VFY: unable to resolve new-instance 10 (Lcom/example/myfirstandroidapplication/MainActivity$1;) in Lcom/example/myfirstandroidapplication/MainActivity;
08-09 15:48:56.586: D/dalvikvm(378): VFY: replacing opcode 0x22 at 0x0009
08-09 15:48:56.636: D/dalvikvm(378): VFY: dead code 0x000b-0010 in Lcom/example/myfirstandroidapplication/MainActivity;.onCreate (Landroid/os/Bundle;)V
08-09 15:48:56.717: D/AndroidRuntime(378): Shutting down VM
08-09 15:48:56.717: W/dalvikvm(378): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-09 15:48:56.736: E/AndroidRuntime(378): FATAL EXCEPTION: main
08-09 15:48:56.736: E/AndroidRuntime(378): java.lang.NoClassDefFoundError: com.example.myfirstandroidapplication.MainActivity$1
08-09 15:48:56.736: E/AndroidRuntime(378): at com.example.myfirstandroidapplication.MainActivity.onCreate(MainActivity.java:28)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.os.Handler.dispatchMessage(Handler.java:99)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.os.Looper.loop(Looper.java:123)
08-09 15:48:56.736: E/AndroidRuntime(378): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-09 15:48:56.736: E/AndroidRuntime(378): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 15:48:56.736: E/AndroidRuntime(378): at java.lang.reflect.Method.invoke(Method.java:521)
08-09 15:48:56.736: E/AndroidRuntime(378): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-09 15:48:56.736: E/AndroidRuntime(378): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-09 15:48:56.736: E/AndroidRuntime(378): at dalvik.system.NativeStart.main(Native Method)
08-09 16:22:11.456: I/dalvikvm(402): Could not find method com.facebook.Session.getActiveSession, referenced from method com.example.myfirstandroidapplication.MainActivity.onActivityResult
08-09 16:22:11.456: W/dalvikvm(402): VFY: unable to resolve static method 27: Lcom/facebook/Session;.getActiveSession ()Lcom/facebook/Session;
08-09 16:22:11.466: D/dalvikvm(402): VFY: replacing opcode 0x71 at 0x0003
08-09 16:22:11.466: D/dalvikvm(402): VFY: dead code 0x0006-000a in Lcom/example/myfirstandroidapplication/MainActivity;.onActivityResult (IILandroid/content/Intent;)V
08-09 16:22:11.476: I/dalvikvm(402): Failed resolving Lcom/example/myfirstandroidapplication/MainActivity$1; interface 25 'Lcom/facebook/Session$StatusCallback;'
08-09 16:22:11.476: W/dalvikvm(402): Link of class 'Lcom/example/myfirstandroidapplication/MainActivity$1;' failed
08-09 16:22:11.507: E/dalvikvm(402): Could not find class 'com.example.myfirstandroidapplication.MainActivity$1', referenced from method com.example.myfirstandroidapplication.MainActivity.onCreate
08-09 16:22:11.507: W/dalvikvm(402): VFY: unable to resolve new-instance 10 (Lcom/example/myfirstandroidapplication/MainActivity$1;) in Lcom/example/myfirstandroidapplication/MainActivity;
08-09 16:22:11.507: D/dalvikvm(402): VFY: replacing opcode 0x22 at 0x0009
08-09 16:22:11.507: D/dalvikvm(402): VFY: dead code 0x000b-0010 in Lcom/example/myfirstandroidapplication/MainActivity;.onCreate (Landroid/os/Bundle;)V
08-09 16:22:11.696: D/AndroidRuntime(402): Shutting down VM
08-09 16:22:11.706: W/dalvikvm(402): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-09 16:22:11.716: E/AndroidRuntime(402): FATAL EXCEPTION: main
08-09 16:22:11.716: E/AndroidRuntime(402): java.lang.NoClassDefFoundError: com.example.myfirstandroidapplication.MainActivity$1
08-09 16:22:11.716: E/AndroidRuntime(402): at com.example.myfirstandroidapplication.MainActivity.onCreate(MainActivity.java:28)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.os.Handler.dispatchMessage(Handler.java:99)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.os.Looper.loop(Looper.java:123)
08-09 16:22:11.716: E/AndroidRuntime(402): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-09 16:22:11.716: E/AndroidRuntime(402): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 16:22:11.716: E/AndroidRuntime(402): at java.lang.reflect.Method.invoke(Method.java:521)
08-09 16:22:11.716: E/AndroidRuntime(402): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-09 16:22:11.716: E/AndroidRuntime(402): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-09 16:22:11.716: E/AndroidRuntime(402): at dalvik.system.NativeStart.main(Native Method)
I have also tried every possible search here and tried resolving library dependencies but still can't get out of this error.
I am also attaching a screen shot of facebook sdk reference error, if it can help you in suggesting me a solution.1
If there is solution to this problem in another thread then please direct me towards the link.

Application crashing while video playing on youtube in weview

I developed an application in which i am loading my youtube channel in webview and it is working fine as expected. i am able to play videos in small screen as well as full screen mode.
But the issue is if I am putting the application in background while the video is playing in full screen mode and and bringing it on foreground application crashing. I have seen the crash log but it is not showing anything from my code I am not getting what is the reason behind the crash. It is showing the NullPointerException but where it came is a mystery.
Logcat :
08-09 14:21:33.480: E/AndroidRuntime(10157): FATAL EXCEPTION: main
08-09 14:21:33.480: E/AndroidRuntime(10157): java.lang.NullPointerException
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.webkit.HTML5VideoFullScreen.prepareForFullScreen(HTML5VideoFullScreen.java:187)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.webkit.HTML5VideoFullScreen.access$600(HTML5VideoFullScreen.java:24)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.webkit.HTML5VideoFullScreen$2.surfaceCreated(HTML5VideoFullScreen.java:124)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.SurfaceView.updateWindow(SurfaceView.java:609)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:235)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.View.dispatchWindowVisibilityChanged(View.java:7678)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1335)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1112)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4472)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.Choreographer.doCallbacks(Choreographer.java:555)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.Choreographer.doFrame(Choreographer.java:525)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.os.Handler.handleCallback(Handler.java:615)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.os.Handler.dispatchMessage(Handler.java:92)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.os.Looper.loop(Looper.java:137)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
android.app.ActivityThread.main(ActivityThread.java:4898)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
java.lang.reflect.Method.invokeNative(Native Method)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
java.lang.reflect.Method.invoke(Method.java:511)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
08-09 14:21:33.480: E/AndroidRuntime(10157): at
dalvik.system.NativeStart.main(Native Method)
Application is not crashing if i am putting application in background while video is playing in small screen only.

VFY: unable to find class referenced in signature

I have a simple android application which uses a modbus library ("jamod") on its build path. It crashes immediately as i run it. I have basically the same problem in this question: Getting "Caused by: java.lang.VerifyError:"
But i cannot really fix the problem. My application was working fine before, now no matter what i do it doesn't seem to work.
Below is logcat output. Thanks in advance.
08-09 14:36:47.753: W/dalvikvm(396): VFY: unable to find class referenced in signature (Lnet/wimpi/modbus/net/TCPMasterConnection;)
08-09 14:36:47.823: W/dalvikvm(396): VFY: unable to resolve exception class 510 (Lnet/wimpi/modbus/ModbusIOException;)
08-09 14:36:47.823: W/dalvikvm(396): VFY: unable to find exception handler at addr 0x18
08-09 14:36:47.854: W/dalvikvm(396): VFY: rejected Lcom/example/xmlparsertest/JavaModBusTcpDriver;.<init> (Ljava/lang/String;I)V
08-09 14:36:47.854: W/dalvikvm(396): VFY: rejecting opcode 0x0d at 0x0018
08-09 14:36:47.854: W/dalvikvm(396): VFY: rejected Lcom/example/xmlparsertest/JavaModBusTcpDriver;.<init> (Ljava/lang/String;I)V
08-09 14:36:47.854: W/dalvikvm(396): Verifier rejected class Lcom/example/xmlparsertest/JavaModBusTcpDriver;
08-09 14:36:47.854: D/AndroidRuntime(396): Shutting down VM
08-09 14:36:47.854: W/dalvikvm(396): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-09 14:36:47.873: E/AndroidRuntime(396): FATAL EXCEPTION: main
08-09 14:36:47.873: E/AndroidRuntime(396): java.lang.VerifyError: com.example.xmlparsertest.JavaModBusTcpDriver
08-09 14:36:47.873: E/AndroidRuntime(396): at com.example.xmlparsertest.MainActivity.<init>(MainActivity.java:13)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.Class.newInstanceImpl(Native Method)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.Class.newInstance(Class.java:1429)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.os.Handler.dispatchMessage(Handler.java:99)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.os.Looper.loop(Looper.java:123)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.reflect.Method.invoke(Method.java:521)
08-09 14:36:47.873: E/AndroidRuntime(396): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-09 14:36:47.873: E/AndroidRuntime(396): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-09 14:36:47.873: E/AndroidRuntime(396): at dalvik.system.NativeStart.main(Native Method)

One thing to double check you are doing is that the checkbox is ticked for the jar files in the "Order and Export" tab in the Build path window. That will include the library in the built APK.

Did you put the jamod jar file in the "libs" directory in Eclipse? If not it won't be bundled into your application even if it is on the path during compilation. This is a fairly new change.

I had a similar VFY, link and class def not found errors even though all of my libraries were in "LIB" folder and had added them in build path as well and ECLIPSE could find them easily in compile time, but when they were deployed on a real device, it gave problems.
Solution: Make sure your library files are placed in "libs" folder and not in "lib" or "library" in the ECLIPSE project.

This error (java.lang.VerifyError) comes when there are incompatible resources like interfaces/class/libs files, improper inheritances/encapsulation of static/instance level identifiers as variables/methods/arguments/class/files.
This issue is coming by simply violation of OOP design principles in the code. So the code rejected by verification process of jvm and throws verification error on runtime. If you closely look at the Error stacktrace, Instance of class-A(com.example.xmlparsertest.MainActivity) is being created by jvm stack [java.lang.Class.newInstanceImpl(Native Method)... java.lang.Class.newInstance...]. This class is referring or being reffered by other classes with violation of design principles which is causing the class to fail to get instantiated.
08-09 14:36:47.854: W/dalvikvm(396): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-09 14:36:47.873: E/AndroidRuntime(396): FATAL EXCEPTION: main
08-09 14:36:47.873: E/AndroidRuntime(396): java.lang.VerifyError: com.example.xmlparsertest.JavaModBusTcpDriver
08-09 14:36:47.873: E/AndroidRuntime(396): at com.example.xmlparsertest.MainActivity.<init>(MainActivity.java:13)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.Class.newInstanceImpl(Native Method)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.Class.newInstance(Class.java:1429)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.os.Handler.dispatchMessage(Handler.java:99)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.os.Looper.loop(Looper.java:123)
08-09 14:36:47.873: E/AndroidRuntime(396): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 14:36:47.873: E/AndroidRuntime(396): at java.lang.reflect.Method.invoke(Method.java:521)
08-09 14:36:47.873: E/AndroidRuntime(396): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-09 14:36:47.873: E/AndroidRuntime(396): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-09 14:36:47.873: E/AndroidRuntime(396): at dalvik.system.NativeStart.main(Native Method)
These warnings cannot be ignored because these warnings are causing the FATAL EXCEPTIONS. Dalvikvm Engineers have implemented the OOP principles as Sun Engineers Done. There are various blogs/forum where people says to ignore these warning. So do not ignore these warning and correct them especially for medical/banking/security field applications or that warning is causing to break the Application.
Do recheck your implemented OOP design principles (e.g. inheritances/encapsulation/polymorphism etc.) in the code. I was being asked to check and eliminate such errors on a big multi-module android application and i found many design violations.
First trigger to solve such issues make public/non-final everything related to class which is getting into FATAL ERROR. Once you solved, then implement your design principles one-by-one and you will get an error free appplication.
Thanks,
Vinod Bherwal (Android Architect).

How to get rid of java.lang.OutOfMemoryError: thread creation failed in android?

I have used more than 15 Handlers in a timing being executed one gets over another on completion.I get java.lang.OutOfMemoryError: thread creation failed in the log and the app crashes,the code runs fine for the first time and gets crashes in the second time due to this issue how can I resolve this.Please help with this issue.Thanks.
MY log is
08-09 13:36:12.125: E/AndroidRuntime(1473): FATAL EXCEPTION: main
08-09 13:36:12.125: E/AndroidRuntime(1473): java.lang.OutOfMemoryError: thread creation failed
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.lang.VMThread.create(Native Method)
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.lang.Thread.start(Thread.java:1232)
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.util.Timer$TimerImpl.<init>(Timer.java:192)
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.util.Timer.<init>(Timer.java:369)
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.util.Timer.<init>(Timer.java:389)
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.util.Timer.<init>(Timer.java:396)
08-09 13:36:12.125: E/AndroidRuntime(1473): at com.CarBuyCo.Slotter.rollerstopthree(Slotter.java:655)*
08-09 13:36:12.125: E/AndroidRuntime(1473): at com.CarBuyCo.Slotter$32.run(Slotter.java:593)*
08-09 13:36:12.125: E/AndroidRuntime(1473): at android.os.Handler.handleCallback(Handler.java:587)
08-09 13:36:12.125: E/AndroidRuntime(1473): at android.os.Handler.dispatchMessage(Handler.java:92)
08-09 13:36:12.125: E/AndroidRuntime(1473): at android.os.Looper.loop(Looper.java:130)
08-09 13:36:12.125: E/AndroidRuntime(1473): at android.app.ActivityThread.main(ActivityThread.java:3687)
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 13:36:12.125: E/AndroidRuntime(1473): at java.lang.reflect.Method.invoke(Method.java:507)
08-09 13:36:12.125: E/AndroidRuntime(1473): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
08-09 13:36:12.125: E/AndroidRuntime(1473): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
08-09 13:36:12.125: E/AndroidRuntime(1473): at dalvik.system.NativeStart.main(Native Method)