当我用新的gradle2.0.0-alpha编译项目时, java.lang.RuntimeException: Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication: java.lang.ClassNotFoundException: Didn't find class "com.android.tools.fd.runtime.BootstrapApplication" on path: DexPathList[[zip file "/data/app/com.inoutdelivery.enfesta-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]] 有任何想法吗?