e: [kapt] An exception occurred: android.databinding.tool.util.LoggedErrorException: Found data binding errors

Question

I have enabled databinding, but while I execute the code I get this error.

error

e: [kapt] An exception occurred: android.databinding.tool.util.LoggedErrorException: Found data binding errors.

I created a fragment class and XML for that class. Im able to import datbindingutil class.

I have done rebuilt/ sync with gradle files/ invalidate cache and restart, nothing worked.

xml

<layout>

<!--suppress AndroidUnknownAttribute -->
<data class=".databinding.ProfileFragmentBinding">

    <variable
        name="user"
        type="com.sample.sample.user.User" />

    <variable
        name="vm"
        type="com.sample.sample.user.UserViewModel" />

    <variable
        name="handler"
        type="com.sample.sample.user.profile.ProfileFragment" />
</data>


<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/profileIV"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/medium"
        android:layout_marginTop="@dimen/medium"
        android:contentDescription="@null"
        android:src="@mipmap/ic_launcher_round"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:url="@{user.avatarUrl}" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="@+id/profileIV"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="@+id/profileIV">

        <TextView
            android:id="@+id/profileNameLabel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:fontFamily="@font/myriad_pro_semibold"
            android:text="@{user.name}"
            android:textColor="@color/black_transparent_de"
            android:textSize="@dimen/text_regular"
            tools:text="NAME" />

        <TextView
            android:id="@+id/badgeLabel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:fontFamily="@font/myriad_pro_semibold"
            android:text="@{user.badge}"
            android:textColor="@color/grey_000000"
            android:textSize="@dimen/text_regular"
            tools:text="Superman" />

        <TextView
            android:id="@+id/profile_Label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:fontFamily="@font/roboto_bold"
            android:text="@{user.badge}"
            android:textColor="@color/green_39b54a"
            android:textSize="@dimen/text_small"
            tools:text="farmer_v1" />

    </LinearLayout>

    <ImageView
        android:id="@+id/badgeIV"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="@dimen/medium"
        android:layout_marginTop="@dimen/medium"
        android:contentDescription="@null"
        android:src="@mipmap/ic_launcher"
        app:error="@{@drawable/ic_profile_default_grey_24dp}"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:placeholder="@{@drawable/ic_profile_default_grey_24dp}"
        app:url="@{user.badgeUrl}" />

    <ImageView
        android:id="@+id/locationPinIV"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/medium"
        android:contentDescription="@null"
        android:src="@drawable/ic_location_pin"
        app:layout_constraintStart_toStartOf="@+id/profileIV"
        app:layout_constraintTop_toBottomOf="@+id/profileIV" />

    <TextView
        android:id="@+id/profileAddressTV"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/narrow"
        android:fontFamily="@font/roboto"
        android:textColor="@color/grey_000000"
        app:layout_constraintBottom_toBottomOf="@+id/locationPinIV"
        app:layout_constraintLeft_toRightOf="@+id/locationPinIV"
        app:layout_constraintTop_toTopOf="@+id/locationPinIV"
        tools:text="bangalore, Karnataka" />

    <ImageView
        android:id="@+id/dobIV"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/standard"
        android:layout_marginTop="@dimen/medium"
        android:contentDescription="@null"
        android:src="@drawable/ic_dob"
        app:layout_constraintLeft_toRightOf="@+id/profileAddressTV"
        app:layout_constraintTop_toBottomOf="@+id/profileIV" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/narrow"
        android:fontFamily="@font/roboto"
        android:textColor="@color/grey_000000"
        app:layout_constraintBottom_toBottomOf="@+id/locationPinIV"
        app:layout_constraintLeft_toRightOf="@+id/dobIV"
        app:layout_constraintTop_toTopOf="@+id/locationPinIV"
        tools:text="born on 01/01/2000" />

    <TextView
        android:id="@+id/activityLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/big"
        android:fontFamily="@font/myriad_pro_semibold"
        android:text="@string/activities"
        android:textColor="@color/black_transparent_de"
        android:textSize="@dimen/text_regular"
        app:layout_constraintStart_toStartOf="@+id/profileIV"
        app:layout_constraintTop_toBottomOf="@+id/locationPinIV" />

    <View
        android:id="@+id/dividerV"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginEnd="@dimen/small"
        android:layout_marginStart="@dimen/small"
        android:layout_marginTop="@dimen/regular"
        android:background="@color/grey_000000"
        app:layout_constraintTop_toBottomOf="@+id/activityLabel" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="@+id/dividerV">

        <!--<com.google.android.material.tabs.TabLayout
            android:id="@+id/tablayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:pager="@{(pager)}"
            app:tabGravity="fill"
            app:tabIndicatorColor="@color/black"
            app:tabMode="fixed"
            app:tabSelectedTextColor="@color/black"
            app:tabTextAppearance="@style/CustomTextTab"
            app:tabTextColor="#b4ffffff" />

        <androidx.viewpager.widget.ViewPager
            android:id="@+id/viewpager"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/tablayout"
            app:handler="@{handler}"
            app:layout_behavior="@string/appbar_scrolling_view_behavior" />-->

    </RelativeLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

class

    class ProfileFragment : Fragment() {
    @Inject
    lateinit var mFactory: ViewModelProvider.Factory
    private lateinit var mBinding: ProfileFragmentBinding

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        mBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_profile, container, false);
        return mBinding.root
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)
        val vm: UserViewModel = getViewModel(mFactory)
        mBinding.vm = vm
        //mBinding.handler = this
        //mBinding.setLifecycleOwner(this)
    }

    /*@BindingAdapter("bind:handler")
    fun bindViewPagerAdapter(view: ViewPager, activity: MainActivity) {
        val adapter = ProfilePagerAdapter(view.context, activity.supportFragmentManager)
        view.adapter = adapter
    }

    @BindingAdapter("bind:pager")
    fun bindViewPagerTabs(view: TabLayout, pagerView: ViewPager) {
        view.setupWithViewPager(pagerView, true)
    }*/
}

Answer 1

in my case I was able to find it when the mouse was hovering that line in the build output, as shown here:

without hover:

with hover:

it's really a shame how they show the error, for the simplest error ever, I was trying 10 different solutions as well invalidating the cache and ...

UPDATE:

you can also click here :

and you'll get something like this:

which is very detailed information about the error, I was missing this button in 7 years of Android Development :D

Answer 2

Run ./gradlew build --stacktrace to check the details, which will tell you where the issue happens, something like:

e: [kapt] An exception occurred: android.databinding.tool.util.LoggedErrorException: Found data binding errors. Could not find accessor xx file:xxx/app/src/main/res/layout/fragment_xxxx.xml Line:108

Sometimes if you changed the property name, especially when changed by refactor => rename, the property name won't be changed in xml automatically.