配合DataBinding使用会崩溃

[wangzhengyi]

我简单的把module1的Activity改成了DataBinding，直接crash。
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.databinding.DataBinderMapperImpl" on path: DexPathList[[zip file "/data/app/com.xsm.easyrouter-P-3YCBtlxzJCEVXQJF52_w==/base.apk"],nativeLibraryDirectories=[/data/app/com.xsm.easyrouter-P-3YCBtlxzJCEVXQJF52_w==/lib/arm64, /system/lib64, /system/vendor/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.databinding.DataBindingUtil.(DataBindingUtil.java:32) 
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:284) 
at com.xsm.module1.Module1MainActivity.onCreate(Module1MainActivity.java:24) 
at android.app.Activity.performCreate(Activity.java:7050) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2809) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2931) 
at android.app.ActivityThread.-wrap11(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1620) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:176) 
at android.app.ActivityThread.main(ActivityThread.java:6701) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:246) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)