Error:Execution failed for task ':app:dexDebug'. > comcommand finished with non-zero exit value 2

Question

In android studio I implement push notification. I downloaded a demo and import in android studio. There is no problem in source code but when I run this program it will sh

Answer 1

You need to know the root cause of the problem. Sometime it may be JDK error. When I analysed I found

Unable to execute dex: method ID not in [0, 0xffff]: 65536

Just above the following error

org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.8.0_40\bin\java.exe'' finished with non-zero exit value 2

So I enabled multidex and it worked

android {
   defaultConfig {
      ...
      multiDexEnabled = true
   }
}

So in order to figure out your problem, just track what is going wrong.