Develop Reference

My app freezes crashes when it's supposed to go to the next activity

I don't know why the app crashes whenever it's supposed to go to the next Activity. I made a practice app that works as it should when using the same format. I uploaded the files to gist.github.
The error is
1216-1216/com.example.chiozokamalu.newfreshstart E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.ArrayIndexOutOfBoundsException
at com.example.chiozokamalu.newfreshstart.MainActivity.onClick(MainActivity.java:164)
at android.view.View.performClick(View.java:2485)
at android.view.View$PerformClick.run(View.java:9080)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
On line 164 of MainActivity.java:
questionView.setText(questions[questionIndex]); // set the text to the next question
EDIT: After Varun helped me, I get a new error which is
1307-1307/com.example.chiozokamalu.newfreshstart E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.chiozokamalu.newfreshstart/com.example.chiozokamalu.newfreshstart.Results1}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.chiozokamalu.newfreshstart.Results1.onCreate(Results1.java:58)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
            at android.app.ActivityThread.access$1500(ActivityThread.java:117)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:130)
            at android.app.ActivityThread.main(ActivityThread.java:3683)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
            at dalvik.system.NativeStart.main(Native Method)

The questions array at line no. 164 is going out of bound that means questionIndex is greater than the total length of the questions array. So you should add a check on the length before extracting value from the array.
You have added the check but after that you incremented the value so either you modify the if condition to if (questionIndex < questions.length -1)
or modify the questionIndex variable before the if condition
You are getting problem because you haven't initiated resultView9 that is why it is null and giving nullpointer, just initiatlise it as you done with other and everything is fine. You have initialised the resultView8 twice just add resultview9 over there

Butterknife library not working with HoloEverywhere/Android bootstrap

I am currently coding on the Android Bootstrap app, I want to have the new DataPickers en make use of new widgets without worrying about porting back to 2.1+
so I use the HoloEveryWhere Library. I also use the Android Bootstrap with Butterknife library
When I debug I get this exception
E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{nl.webridge.whtsnxt.debug/nl.webridge.whtsnxt.authenticator.BootstrapAuthenticatorActivity}: butterknife.ButterKnife$UnableToInjectException: Unable to inject views for nl.webridge.whtsnxt.authenticator.BootstrapAuthenticatorActivity#40619210
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
Caused by: butterknife.ButterKnife$UnableToInjectException: Unable to inject views for nl.webridge.whtsnxt.authenticator.BootstrapAuthenticatorActivity#40619210
at butterknife.ButterKnife.inject(ButterKnife.java:176)
at butterknife.ButterKnife.inject(ButterKnife.java:104)
at nl.webridge.whtsnxt.authenticator.BootstrapAuthenticatorActivity.onCreate(BootstrapAuthenticatorActivity.java:140)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
            at android.app.ActivityThread.access$1500(ActivityThread.java:117)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:130)
            at android.app.ActivityThread.main(ActivityThread.java:3687)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
            at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at butterknife.ButterKnife.inject(ButterKnife.java:171)
            at butterknife.ButterKnife.inject(ButterKnife.java:104)
            at nl.webridge.whtsnxt.authenticator.BootstrapAuthenticatorActivity.onCreate(BootstrapAuthenticatorActivity.java:140)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
            at android.app.ActivityThread.access$1500(ActivityThread.java:117)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:130)
            at android.app.ActivityThread.main(ActivityThread.java:3687)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
            at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassCastException: org.holoeverywhere.widget.AutoCompleteTextView
at nl.webridge.whtsnxt.authenticator.BootstrapAuthenticatorActivity$$ViewInjector.inject(BootstrapAuthenticatorActivity$$ViewInjector.java:14)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
I think there's a problem with the HoloEverywhere activity I use in my app.
For example I use the import org.holoeverywhere.app.Activity; in all my Activity classes.
But the Butterknife use android.app.Activity; The problem is, I can't change code in the Butterknife to use the Activity from HoloEverywhere.
Please tell me your thoughts on this I use the latest version of Butterknife and HoloEveryWhere.

Try to set up in your AndroidManifest.xml the holo theme:
<application
android:theme="#style/Holo.Theme.NoActionBar.Fullscreen"
or maybe only the in activity that is happening your problem (also in the manifest)
<activity
android:theme="#style/Holo.Theme.NoActionBar.Fullscreen"
Of course in your java class, if the component is defined as a holo component in the xml layout, in your java class you have to import that component from the holo library like you are doing:
import org.holoeverywhere.app.Activity
or
import org.holoeverywhere. whatever (like button, switch, whatever)

Check if your #InjectViews has correct type.
I've used ImageView instead of LinearLayout.

Also check if you are not using other ButterKnife's injection annotations incorrectly. I've used #OnItemClick annotation for RecyclerView, which was causing RuntimeException.

Google Maps Android API v2 and Eclipse

I am new in Google Map and so many things aren't clear enough to me for that reason.So i expect some expert's direction on this regard.I read This Guide and did everything what it says.I use google map api v2 and get a map key.Then i make a sample project following that link and select target version android 2.2(while running the project).But a list of error occurs after running then example in eclipse android emulator.My logcat view shows:
01-31 00:51:59.226: W/dalvikvm(329): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
01-31 00:51:59.236: E/AndroidRuntime(329): FATAL EXCEPTION: main
01-31 00:51:59.236: E/AndroidRuntime(329): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.googleMapApp/com.googleMapApp.LocationProfileManagerActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.os.Handler.dispatchMessage(Handler.java:99)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.os.Looper.loop(Looper.java:123)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.ActivityThread.main(ActivityThread.java:4627)
01-31 00:51:59.236: E/AndroidRuntime(329): at java.lang.reflect.Method.invokeNative(Native Method)
01-31 00:51:59.236: E/AndroidRuntime(329): at java.lang.reflect.Method.invoke(Method.java:521)
01-31 00:51:59.236: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-31 00:51:59.236: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-31 00:51:59.236: E/AndroidRuntime(329): at dalvik.system.NativeStart.main(Native Method)
01-31 00:51:59.236: E/AndroidRuntime(329): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
01-31 00:51:59.236: E/AndroidRuntime(329): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.Activity.setContentView(Activity.java:1647)
01-31 00:51:59.236: E/AndroidRuntime(329): at com.googleMapApp.LocationProfileManagerActivity.onCreate(LocationProfileManagerActivity.java:14)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-31 00:51:59.236: E/AndroidRuntime(329): ... 11 more
01-31 00:51:59.236: E/AndroidRuntime(329): Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader[/data/app/com.googleMapApp-1.apk]
01-31 00:51:59.236: E/AndroidRuntime(329): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
01-31 00:51:59.236: E/AndroidRuntime(329): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
01-31 00:51:59.236: E/AndroidRuntime(329): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.createView(LayoutInflater.java:466)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:544)
01-31 00:51:59.236: E/AndroidRuntime(329): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
01-31 00:51:59.236: E/AndroidRuntime(329): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
My Manifest.xml is:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.googleMapApp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<permission
android:name="com.googleMapApp.permission.MAPS_RECEIVE"
android:protectionLevel="signature"/>
<uses-permission android:name="com.googleMapApp.permission.MAPS_RECEIVE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<!-- Require OpenGL ES version 2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".LocationProfileManagerActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="myMapKey"/>
</application>
</manifest>
My main.xml is:
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment"/>
My activity.java is:
package com.googleMapApp;
import android.app.Activity;
import android.os.Bundle;
public class LocationProfileManagerActivity extends Activity {
/** Called when the activity is first created. */
//private GoogleMap map;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
}
}
Sorry for this lengthy description,but i want to show you exactly what i did.I think as a newcomer i did a lot of mistake on this way.so i expect someone will guide me that.

You are using features only available in later APIs, namely Fragment. If you want to compile to support 2.2, you need to include the Support Library in your project. You will also have to make the following changes to use support fragments instead of regular fragments --
In main.xml, change
class="com.google.android.gms.maps.MapFragment"/>
to
class="com.google.android.gms.maps.SupportMapFragment"/>
and in your activity.java, change
public class LocationProfileManagerActivity extends Activity {
to
public class LocationProfileManagerActivity extends FragmentActivity {

you need to make two changes
Since as you are sdk version is below 12, need to make following change
1)
main.xml
Replace
class="com.google.android.gms.maps.MapFragment"/>
with
class="com.google.android.gms.maps.SupportMapFragment"/>
2) activity.java
Need to extend FragmentActivity instead of Activity
If you want to test in emulator , then download the google_play_services_apk and install it in emulator.

Maps API v2 cannot be run in an emulator because of its dependency on Google Play Services, which is bundled in the Google Play Store .apk. It can be hacked together though, you can read about it here on the first Google result for "Google maps v2 emulator". Also you can still use V1 for a limited time, you can get started here.

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).

Unable to implement Facebook Integration in Android

I'm trying to implement the Facebook implementation as mentioned in the following link -
https://developers.facebook.com/docs/mobile/android/build/
However, after I've implemented upto step 6.3 and try to run my application, I'm being shown the following error message in the log -
03-01 14:19:50.124: W/dalvikvm(329): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
03-01 14:19:50.135: E/AndroidRuntime(329): Uncaught handler: thread main exiting due to uncaught exception
03-01 14:19:50.173: E/AndroidRuntime(329): java.lang.NoClassDefFoundError: com.facebook.android.Facebook
03-01 14:19:50.173: E/AndroidRuntime(329): at com.test.fbandroid.MyGreatAppActivity.<init>(MyGreatAppActivity.java:14)
03-01 14:19:50.173: E/AndroidRuntime(329): at java.lang.Class.newInstanceImpl(Native Method)
03-01 14:19:50.173: E/AndroidRuntime(329): at java.lang.Class.newInstance(Class.java:1479)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.os.Handler.dispatchMessage(Handler.java:99)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.os.Looper.loop(Looper.java:123)
03-01 14:19:50.173: E/AndroidRuntime(329): at android.app.ActivityThread.main(ActivityThread.java:4363)
03-01 14:19:50.173: E/AndroidRuntime(329): at java.lang.reflect.Method.invokeNative(Native Method)
03-01 14:19:50.173: E/AndroidRuntime(329): at java.lang.reflect.Method.invoke(Method.java:521)
03-01 14:19:50.173: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
03-01 14:19:50.173: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
03-01 14:19:50.173: E/AndroidRuntime(329): at dalvik.system.NativeStart.main(Native Method)
I'm using Android 2.1 with version 7 as the mini SDK.
Any pointers on this would be of great help.
Thanks in advance,
Amitava

it's quite easy ....
Download the code for facebook SDK and add as a library in your project and then run it.
Add two variables as
String appId="000000000000000"; //your appp ID
Facebook facebook;
and initialise the facebook variable
facebook = new Facebook(appId);