Data Binding Android - Type parameter T has incompatible upper bounds : ViewDataBinding and MainActivity

Question

I am using Android Studio 2.0 Preview 4. I\'m using Android SDK tools 25 rc1. This error persists no matter how many times I clean / rebuild project. File->Invalidate Caches

Answer 1

in top level Build.Gradle file use gradle 1.5.0 or above

 dependencies {
    classpath 'com.android.tools.build:gradle:1.5.0'
}

if it is lower than 1.5.0 then use this one also in top level gradle file

        classpath "com.android.databinding:dataBinder:1.0-rc4"

Answer 2

This solution worked for me "File -> Invalidate Caches / Restart" https://stackoverflow.com/a/32191257/2205809

Answer 3

You should use:

ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);

In onCreate

MainActivity isn't the generated Binding class.

Answer 4

Check the name of the binding class, here ActivityMainInitBinding is generated based on the xml file activity_mail_init.xml. If you use wrong class the error pops up.

  val binding : ActivityMainInitBinding=
        DataBindingUtil.setContentView(this, R.layout.activity_main_init)