android - problems after installing java 8

Android Studio had a popup telling updates was available
after i run the SDK manager and started the Android Studio again I got another popoup
that toke me to Androids website where it told me that I should upgrade to Java JDK 8
and JRE 8 after I did i got over 235 errors when try to run the debug. I uninstalled
version 8 and reinstalled 7u80 JDK and JRE now I'm down to 34 errors. When I type java
-version I get 1.8.073

here are all 35
errors.

            Error:java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported
            major.minor version 52.0
Error:java.lang.UnsupportedClassVersionError:
            com/android/dx/command/Main : Unsupported major.minor version 52.0
Error: at
            java.lang.ClassLoader.defineClass1(Native Method)
Error: at
            java.lang.ClassLoader.defineClass1(Native Method)
Error: at
            java.lang.ClassLoader.defineClass(ClassLoader.java:800)
Error: at
            java.lang.ClassLoader.defineClass(ClassLoader.java:800)
Error: at
            java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
Error:
            at
            java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

Error:
            at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
Error: at
            java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
Error: at
            java.net.URLClassLoader.access$100(URLClassLoader.java:71)
Error: at
            java.net.URLClassLoader.access$100(URLClassLoader.java:71)
Error: at
            java.net.URLClassLoader$1.run(URLClassLoader.java:361)
Error: at
            java.net.URLClassLoader$1.run(URLClassLoader.java:361)
Error: at
            java.net.URLClassLoader$1.run(URLClassLoader.java:355)
Error: at
            java.net.URLClassLoader$1.run(URLClassLoader.java:355)
Error: at
            java.security.AccessController.doPrivileged(Native Method)
Error: at
            java.security.AccessController.doPrivileged(Native Method)

Error:
            at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
Error: at
            java.net.URLClassLoader.findClass(URLClassLoader.java:354)
Error: at
            java.lang.ClassLoader.loadClass(ClassLoader.java:425)
Error: at
            java.lang.ClassLoader.loadClass(ClassLoader.java:425)
Error: at
            sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
Error: at
            sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
Error: at
            java.lang.ClassLoader.loadClass(ClassLoader.java:358)
Error: at
            java.lang.ClassLoader.loadClass(ClassLoader.java:358)
Error: at
            sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Error:
            at
            sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

Error:Exception
            in thread "main" 
Error:Exception in thread "main" 
Error:Execution
            failed for task ':app:transformClassesWithDexForDebug'.
>
            com.android.build.api.transform.TransformException: java.lang.RuntimeException:
            com.android.ide.common.process.ProcessException:
            java.util.concurrent.ExecutionException:
            com.android.ide.common.process.ProcessException:
            org.gradle.process.internal.ExecException: Process 'command 'C:\Program
            Files\Java\jdk1.7.0_80\bin\java.exe'' finished with non-zero exit value
            1

Here is the
Gradel.build

android {

            compileSdkVersion 23

 buildToolsVersion '24.0.0 rc1'

            defaultConfig {
 applicationId "com.kim.printer"
 minSdkVersion
            21
 targetSdkVersion 23
 }
 buildTypes {

            release {
 minifyEnabled false
 proguardFiles
            getDefaultProguardFile('proguard-android.txt'),
            'proguard-rules.txt'

 }
 }
 compileOptions
            {
 sourceCompatibility JavaVersion.VERSION_1_7
 targetCompatibility
            JavaVersion.VERSION_1_7
 }
 productFlavors {

            }
}


dependencies {
 compile
            'com.google.android.gms:play-services-gcm:8.4.0'
 compile
            'com.google.code.gson:gson:2.4'
 compile
            "com.android.support:support-v4:23.1.0"
 compile
            "com.android.support:support-v13:23.1.0"
 compile
            "com.android.support:cardview-v7:23.1.0"
 compile
            'com.android.support:appcompat-v7:23.0.0'
 compile
            files('libs/StarIOPort3.1.jar')
 compile
            files('libs/StarIO_Extension.jar')
}

Thanks
for any help I have been working on this for 6 hours and I can get it to
compile.