I tried Buiding the app but keep getting /Users/gouravkarwasara/Desktop/News2/app/build/generated/source/kapt/debug/com/gourav/news/DataBinderMapperImpl.java:9: error: cannot find symbol import com.gourav.news.databinding.ActivityDetailBindingImpl; ^ symbol: class ActivityDetailBindingImpl location: package com.gourav.news.databinding

this error.

I have tried clean and build also Invalidate and restart

apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' apply plugin: 'kotlin-kapt' android { compileSdkVersion 28 defaultConfig { applicationId "com.gourav.news" minSdkVersion 21 targetSdkVersion 28 versionCode 1 versionName "1.0" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } dataBinding { enabled = true } } dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" implementation 'androidx.appcompat:appcompat:1.1.0-alpha02' implementation 'androidx.core:core-ktx:1.1.0-alpha04' implementation 'androidx.constraintlayout:constraintlayout:1.1.3' testImplementation 'junit:junit:4.12' androidTestImplementation 'androidx.test:runner:1.1.2-alpha01' androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.2-alpha01' implementation "androidx.lifecycle:lifecycle-extensions:2.0.0" kapt "androidx.lifecycle:lifecycle-compiler:2.0.0" implementation "androidx.room:room-runtime:2.0.0" kapt "androidx.room:room-compiler:2.0.0" implementation 'com.google.android.material:material:1.1.0-alpha03' implementation "com.squareup.retrofit2:retrofit:2.4.0" implementation "com.squareup.retrofit2:converter-gson:2.4.0" implementation "com.squareup.okhttp3:logging-interceptor:3.11.0" // Retrofit for networking implementation "com.squareup.retrofit2:retrofit:2.4.0" implementation "com.squareup.retrofit2:converter-gson:2.4.0" implementation "com.squareup.okhttp3:logging-interceptor:3.11.0" //Timber for logging implementation "com.jakewharton.timber:timber:4.7.1" // Image Loading and Caching implementation "com.github.bumptech.glide:glide:4.8.0" annotationProcessor "com.github.bumptech.glide:compiler:4.8.0" implementation "com.google.firebase:firebase-core:16.0.7" }

activity_detail.xml

<?xml version="1.0" encoding="utf-8"?> <layout> <data> <import type="com.gourav.news.utils.BindingUtils" /> <variable name="article" type="com.gourav.news.model.Article" /> </data> <ScrollView 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" xmlns:bind="http://schemas.android.com/apk/res-auto"> <androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="16dp" tools:context=".DetailActivity"> <View android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintBottom_toBottomOf="@id/tv_news_source" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@id/iv_news_image" /> <ImageView android:id="@+id/iv_news_image" android:layout_width="match_parent" android:layout_height="0dp" android:contentDescription="@string/image_desc" android:foreground="@drawable/news_image_gradient" app:layout_constraintDimensionRatio="h,16:9" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" bind:articleUrl="@{article.url}" bind:urlToImage="@{article.urlToImage}" /> <ImageButton android:id="@+id/iv_save" android:layout_width="48dp" android:layout_height="48dp" android:layout_marginEnd="4dp" android:background="?selectableItemBackgroundBorderless" android:contentDescription="@string/image_desc_save_button" app:layout_constraintEnd_toStartOf="@id/iv_share" app:layout_constraintTop_toTopOf="@id/tv_time" app:srcCompat="@drawable/ic_save" /> <ImageButton android:id="@+id/iv_share" android:layout_width="48dp" android:layout_height="48dp" android:background="?selectableItemBackgroundBorderless" android:contentDescription="@string/image_desc_share_button" app:layout_constraintEnd_toStartOf="@id/guideline_right" app:layout_constraintTop_toTopOf="@id/tv_time" app:srcCompat="@drawable/ic_share" /> <TextView android:id="@+id/tv_time" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:text="@{BindingUtils.formatDateForDetails(article.publishedAt)}" android:textSize="16sp" android:textStyle="bold" app:layout_constraintStart_toStartOf="@id/guideline_left" app:layout_constraintTop_toBottomOf="@+id/tv_news_title" tools:text="@tools:sample/date/ddmmyy" /> <TextView android:id="@+id/tv_news_source" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:paddingBottom="18dp" android:text="@{article.source.name}" android:textSize="16sp" android:textStyle="bold" app:layout_constraintStart_toStartOf="@id/guideline_left" app:layout_constraintTop_toBottomOf="@id/tv_time" tools:text="The Washington Post" /> <TextView android:id="@+id/tv_news_title" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:lineSpacingMultiplier="1.1" android:text="@{article.title}" android:textColor="@color/colorAccent" android:textSize="24sp" android:textStyle="bold" app:layout_constraintEnd_toEndOf="@id/guideline_right" app:layout_constraintStart_toStartOf="@id/guideline_left" app:layout_constraintTop_toBottomOf="@id/iv_news_image"/> <TextView android:id="@+id/tv_news_desc" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginTop="32dp" android:alpha="0.6" android:lineSpacingMultiplier="1.3" android:text="@{article.description}" android:textColor="@color/colorAccent" android:textSize="18sp" app:layout_constraintEnd_toEndOf="@id/guideline_right" app:layout_constraintStart_toStartOf="@id/guideline_left" app:layout_constraintTop_toBottomOf="@id/tv_news_source" tools:layout_editor_absoluteY="365dp"/> <TextView android:id="@+id/tv_news_content" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginTop="32dp" android:alpha="0.6" android:lineSpacingMultiplier="1.3" android:text="@{BindingUtils.truncateExtra(article.content)}" android:textColor="@color/colorAccent" android:textSize="18sp" app:layout_constraintEnd_toEndOf="@id/guideline_right" app:layout_constraintStart_toStartOf="@id/guideline_left" app:layout_constraintTop_toBottomOf="@id/tv_news_desc"/> <Button android:id="@+id/btn_read_full" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="32dp" android:background="@drawable/button_selector" android:paddingStart="16dp" android:paddingEnd="16dp" android:text="@string/button_read_full_story" android:textSize="16sp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@id/tv_news_content" /> <androidx.appcompat.widget.Toolbar android:id="@+id/toolbar" android:layout_width="0dp" android:layout_height="wrap_content" android:background="?actionBarItemBackground" android:fitsSystemWindows="true" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:navigationIcon="@drawable/ic_close" /> <androidx.constraintlayout.widget.Guideline android:id="@+id/guideline_left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" app:layout_constraintGuide_begin="12dp" /> <androidx.constraintlayout.widget.Guideline android:id="@+id/guideline_right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" app:layout_constraintGuide_end="12dp" /> <androidx.constraintlayout.widget.Barrier android:id="@+id/bottom_barrier" android:layout_width="wrap_content" android:layout_height="wrap_content" app:barrierDirection="bottom" app:constraint_referenced_ids="tv_news_desc,tv_news_content,tv_news_title" /> </androidx.constraintlayout.widget.ConstraintLayout> </ScrollView> </layout>

DetailActivity.kt