Android, java class not found exception

Question

I developed an android application which includes some classes, when I tried to run application I see this in log Could not find class 'com.voice.NevisaWebService', referenced from method com.voice.Main.upload but application starts, when I do something in app that needs NevisaWebService class this error appears and application stops working java.lang.NoClassDefFoundError: com.voice.NevisaWebService, what does it mean? I have this class in my wokspace and everything is write why does this error appears?

here is full logcat:

enter image description here

• Siddharth_Vyas: Please post your error from logcat.
• MDroid: Have you Add that Activity in Menifest file?
• ehsan mozafari: I have just one main activity
• MDroid: Ok have you Package named Voice? and Where is the class named NavisaWebserice?
• MDroid: Go to Project--> right click--> Properties--> Java BuildPath--> Order Export--> Tick all check boxes.. Clean Project and Run it again

Answer 1

Try this:

Go to Project/Properties/Java Build Path/Order and Export -- Make sure there's a check in front of Android Dependencies and the support library, if you use it.Mark all checkboxes.Click on Apply and clean the project.

This worked for me.Hope this helps.

• ehsan mozafari: now I get this error Conversion to Dalvik format failed with error 1
• Siddharth_Vyas: Did you add any external library?
• ehsan mozafari: yeah, I attached some external library
• Siddharth_Vyas: Then check all that from checkbox and apply and then clean project.
• ehsan mozafari: I did, and still having same problem

Answer 2

Check for imports and visibility of class.class access modifier must be public.and then try to clean and rebuilt.

Answer 3

1. Please check whether all your Activities included in the AndroidManifest.xml file otherwise add to it.

2. add environment variable for JAVA path from e.g, C:\Program Files\Java\jre6\bin

• ehsan mozafari: I have just one activity (main), what do you mean by your second way?
• Saj: that means setting JAVA_PATH in your system
• Saj: right click on 'Computer' from windows start then go to properties, and then advance settings, u'll find environment variable