Android studio

[moheny]

This looks like a great project, thank you for doing it.
however I can't seem to open it Android Studio i'm getting this error

Error:(20, 0) Could not find property 'RELEASE_STORE_FILE' on SigningConfigDsl_Decorated{name=release, storeFile=null, storePassword=null, keyAlias=null, keyPassword=null, storeType=null}.

I've tried to go to the build.gradle and change the
classpath 'com.android.tools.build:gradle:0.12.2'
which causing the error, first I thought updating it to 1.2.3 will fix the issue, but then i'm getting

Error:Unable to load class 'org.codehaus.groovy.runtime.typehandling.ShortTypeHandling'.
Possible causes for this unexpected error include:

• You are using JDK version 'java version "1.7.0_75"'. Some versions of JDK 1.7 (e.g. 1.7.0_10) may cause class loading errors in Gradle.
  Please update to a newer version (e.g. 1.7.0_67).
  Open JDK Settings
• Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
  Re-download dependencies and sync project (requires network)
• The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
  Stop Gradle build processes (requires restart)

In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

is there anyway to fix this issue ?