Conversion to Dalvik format failed with error 1 Solution? [duplicate]

Answer 1

i had the same problem and spent a lot of time trying everything i could, so the only way that worked for me was upgrading ADT to the latest version. So if nothing from the top helps to you just go Help->"Check for Updates".

Answer 2

I was getting this because I had manually added android.jar to the build libraries because it was saying it wasn't finding the android libraries. The fix was to...

1. Remove android.jar from the build libraries

2. Right click on the project, go to "Android Tools", and select "Fix Project Properties"

Hope this helps.

Answer 3

Removed all the projects from workspace
Import projects back
Clean 

worked !

Answer 4

delete <classpathentry kind="lib" path="libs"/> from .classpath file.

this works for me.

Answer 5

Windows 7 Solution if you are obfuscating with ProGuard:

Confirmed the problem is caused by ProGuard command line in the file
[Android SDK Installation Directory]\tools\proguard\bin\proguard.bat

Edit the following line will solve the problem:

call %java_exe% -jar "%PROGUARD_HOME%"\lib\proguard.jar %*

to

call %java_exe% -jar "%PROGUARD_HOME%"\lib\proguard.jar %1 %2 %3 %4 %5 %6 %7 %8 %9

Answer 6

This issue comes due to some conflicts in the jar which you might have added in the class path. Try removing the specific jar (hit and trail) and see if the error goes off.