Information:Gradle tasks [:app:assembleDebug]
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareCnLeancloudAndroidAvoscloudFeedbackV3134Library UP-TO-DATE
:app:prepareCnLeancloudAndroidAvoscloudPushV3134Library UP-TO-DATE
:app:prepareCnLeancloudAndroidAvoscloudSearchV3134Library UP-TO-DATE
:app:prepareCnLeancloudAndroidAvoscloudSnsV3134Library UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72311Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42311Library UP-TO-DATE
:app:prepareDebugDependencies
:app:compileDebugAidl UP-TO-DATE
:app:compileDebugRenderscript UP-TO-DATE
:app:generateDebugBuildConfig UP-TO-DATE
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets UP-TO-DATE
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources UP-TO-DATE
:app:mergeDebugResources UP-TO-DATE
:app:processDebugManifest UP-TO-DATE
:app:processDebugResources UP-TO-DATE
:app:generateDebugSources UP-TO-DATE
:app:compileDebugJavaWithJavac UP-TO-DATE
:app:compileDebugNdk UP-TO-DATE
:app:compileDebugSources UP-TO-DATE
:app:transformClassesWithDexForDebug
UNEXPECTED TOP-LEVEL EXCEPTION:
Error:Execution failed for task ':app:transformClassesWithDexForDebug'.

com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'D:\Java\jdk1.8.0_51\bin\java.exe'' finished with non-zero exit value 2
Information:BUILD FAILED
Information:Total time: 40.674 secs
Information:1 error
Information:0 warnings
Information:See complete output in console

希望各位大神帮帮忙，我也是刚接触Android不太久，有很多不会的地方，大家多多指教