Android Data Binding: missing DataBinderMapper class - 


java.lang.noclassdeffounderror: android.databinding.databindermapper         @ android.databinding.databindingutil.<clinit>(databindingutil.java:31)         @ com.example.mainactivity.oncreate(mainactivity.java:13)         @ android.app.activity.performcreate(activity.java:5231)         @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1087)         @ android.app.activitythread.performlaunchactivity(activitythread.java:2148)         @ android.app.activitythread.handlelaunchactivity(activitythread.java:2233)         @ android.app.activitythread.access$800(activitythread.java:135)         @ android.app.activitythread$h.handlemessage(activitythread.java:1196)         @ android.os.handler.dispatchmessage(handler.java:102)         @ android.os.looper.loop(looper.java:136)         @ android.app.activitythread.main(activitythread.java:5001)         @ java.lang.reflect.method.invokenative(native method)         @ java.lang.reflect.method.invoke(method.java:515)         @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:785)         @ com.android.internal.os.zygoteinit.main(zygoteinit.java:601)         @ dalvik.system.nativestart.main(native method)

i hope bug, face similar problem? unzipped classes.jar under exploded-arr folder, couldn't find databindermapper class.

any workarounds / fixes appreciated.

you should include android-apt plugin in build.gradle in order generate android.databinding.databindermapper class.

in project build.gradle:

dependencies {         classpath 'com.android.tools.build:gradle:1.3.1'         classpath 'com.android.databinding:databinder:1.0-rc2'         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' //.... more }

in each module build.gradle:

apply plugin: 'com.android.application' apply plugin: 'com.android.databinding' apply plugin: 'com.neenbedankt.android-apt'

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