android - databinding does not exist: How to solve it?

Question

I'm working on an Android application with databinding but I've always next error:

Error: Package my.package.databinding does not exist.

Here is my build.gradle on project level:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.2'
    }
}
allprojects {
    repositories {
        jcenter()
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

I've also enabled binding in the build.gradle file on module level.

Now my question is, why occurs this error and how could I solve it?

Answer 1

This problem occurs usually if your project does not compile. Android databinding should generate code in the named package, but it can't do that if the project doesn't compile in the first place.

To solve this, bring your project to a point where it compiles. If necessary, turn databinding off for this.