Cordova (Android) build failed: transformClassesWithDexForDebug
<p>I'm new to Cordova.  I have installed Android Studio 2.2.1 and Cordova 6.3.1.  My Java version is 1.7.0_111.  I created a new Cordova project and added the platforms: android, cordova-plugin-dialogs and cordova-plugin-network-information.  I then tried building the project but I got an error:</p>

<pre><code>xxxxxx@yyyyyyy ~/cordova/myapp $ cordova build
ANDROID_HOME=/home/xxxxxx/Android/Sdk
JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
Incremental java compilation is an incubating feature.
:preBuild UP-TO-DATE
:preDebugBuild UP-TO-DATE
:checkDebugManifest
:CordovaLib:preBuild UP-TO-DATE
:CordovaLib:preDebugBuild UP-TO-DATE
:CordovaLib:compileDebugNdk UP-TO-DATE
:CordovaLib:compileLint
:CordovaLib:copyDebugLint UP-TO-DATE
:CordovaLib:mergeDebugProguardFiles UP-TO-DATE
:CordovaLib:packageDebugRenderscript UP-TO-DATE
:CordovaLib:checkDebugManifest
:CordovaLib:prepareDebugDependencies
:CordovaLib:compileDebugRenderscript
:CordovaLib:generateDebugResValues UP-TO-DATE
:CordovaLib:generateDebugResources
:CordovaLib:packageDebugResources
:CordovaLib:compileDebugAidl
:CordovaLib:generateDebugBuildConfig
:CordovaLib:mergeDebugShaders
:CordovaLib:compileDebugShaders
:CordovaLib:generateDebugAssets
:CordovaLib:mergeDebugAssets
:CordovaLib:processDebugManifest
:CordovaLib:processDebugResources
:CordovaLib:generateDebugSources
:CordovaLib:incrementalDebugJavaCompilationSafeguard
:CordovaLib:compileDebugJavaWithJavac
:CordovaLib:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
:CordovaLib:processDebugJavaRes UP-TO-DATE
:CordovaLib:transformResourcesWithMergeJavaResForDebug
:CordovaLib:transformClassesAndResourcesWithSyncLibJarsForDebug
:CordovaLib:mergeDebugJniLibFolders
:CordovaLib:transformNative_libsWithMergeJniLibsForDebug
:CordovaLib:transformNative_libsWithSyncJniLibsForDebug
:CordovaLib:bundleDebug
:prepareAndroidCordovaLibUnspecifiedDebugLibrary
:prepareDebugDependencies
:compileDebugAidl
:compileDebugRenderscript
:generateDebugBuildConfig
:mergeDebugShaders
:compileDebugShaders
:generateDebugAssets
:mergeDebugAssets
:generateDebugResValues UP-TO-DATE
:generateDebugResources
:mergeDebugResources
:processDebugManifest
:processDebugResources
:generateDebugSources
:incrementalDebugJavaCompilationSafeguard
:compileDebugJavaWithJavac
:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
Note: /home/xxxxxx/cordova/myapp/platforms/android/src/org/apache/cordova/dialogs/Notification.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
:compileDebugNdk UP-TO-DATE
:compileDebugSources
:prePackageMarkerForDebug
:transformClassesWithDexForDebug
To run dex in process, the Gradle daemon needs a larger heap.
It currently has approximately 910 MB.
For faster builds, increase the maximum heap size for the Gradle daemon to more than 2048 MB.
To do this set org.gradle.jvmargs=-Xmx2048M in the project gradle.properties.
For more information see https://docs.gradle.org/current/userguide/build_environment.html
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
:transformClassesWithDexForDebug FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':transformClassesWithDexForDebug'.
&gt; 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 '/usr/lib/jvm/java-7-openjdk-amd64/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 4.822 secs
Error: /home/xxxxxx/cordova/myapp/platforms/android/gradlew: Command failed with exit code 1 Error output:
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /home/xxxxxx/cordova/myapp/platforms/android/src/org/apache/cordova/dialogs/Notification.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':transformClassesWithDexForDebug'.
&gt; 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 '/usr/lib/jvm/java-7-openjdk-amd64/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
</code></pre>

<p>I tried adding "multiDexEnabled true" to my build.gradle file, but I just got another error: "transformClassesWithMultidexlistForDebug FAILED".  I also tried to clean the Cordova project, but it made no difference to the error.</p>