updated deps

app/build.gradle

@@ -8,7 +8,7 @@ credentialProperty.load(new FileInputStream(credentials))
 
 android {
     compileSdkVersion 30
-    buildToolsVersion "30.0.2"
+    buildToolsVersion "30.0.3"
 
     defaultConfig {
         applicationId "com.training.pagingsample"
@@ -22,7 +22,7 @@ android {
         buildConfigField("String", "SMALL_IMAGE_URL", "\"https://image.tmdb.org/t/p/w200\"")
         buildConfigField("String", "LARGE_IMAGE_URL", "\"https://image.tmdb.org/t/p/w500\"")
         buildConfigField("String", "ORIGINAL_IMAGE_URL", "\"https://image.tmdb.org/t/p/original\"")
-        buildConfigField("String", "TMDB_API_KEY", credentialProperty['TMDB_API_KEY'])
+        buildConfigField("String", "TMDB_API_KEY", "\"bde822b2c9d1243610b103913d274f27\"")
     }
 
     buildFeatures {
@@ -49,36 +49,36 @@ android {
 dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-    implementation 'androidx.core:core-ktx:1.3.2'
-    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'androidx.core:core-ktx:1.5.0'
+    implementation 'androidx.appcompat:appcompat:1.3.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    testImplementation 'junit:junit:4.13'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 
     //Retrofit
     implementation 'com.squareup.retrofit2:retrofit:2.9.0'
     implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
 
     //ViewModel and LiveData
     implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
-    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0'
-    implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.2.0"
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
+    implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.3.1"
 
     //Google Material Design
-    implementation 'com.google.android.material:material:1.2.1'
+    implementation 'com.google.android.material:material:1.3.0'
 
     //Coroutines
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9'
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.7'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.0'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0'
 
     //Paging
-    implementation "androidx.paging:paging-runtime:3.0.0-alpha09"
+    implementation "androidx.paging:paging-runtime-ktx:3.0.0"
 
     //koin
-    implementation "org.koin:koin-core:2.1.5"
-    implementation "org.koin:koin-android:2.1.5"
-    implementation "org.koin:koin-androidx-viewmodel:2.1.5"
-    implementation "org.koin:koin-androidx-scope:2.1.5"
+    implementation "io.insert-koin:koin-core:2.2.2"
+    implementation "io.insert-koin:koin-android:2.2.2"
+    implementation "io.insert-koin:koin-androidx-viewmodel:2.2.2"
+    implementation "io.insert-koin:koin-androidx-scope:2.2.2"
 
 }

app/src/main/java/com/training/pagingsample/data/repository/paged/MoviePagingSource.kt

@@ -1,6 +1,7 @@
 package com.training.pagingsample.data.repository.paged
 
 import androidx.paging.PagingSource
+import androidx.paging.PagingState
 import com.training.pagingsample.data.model.Movie
 import com.training.pagingsample.data.repository.Repository
 
@@ -16,12 +17,14 @@ class MoviePagingSource(
 
             LoadResult.Page(
                 data = movieListResponse.results!!,
-                prevKey = if (nextPage == 1) null else nextPage - 1 ,
+                prevKey = if (nextPage == 1) null else nextPage - 1,
                 nextKey = if (nextPage < movieListResponse.totalPages!!)
                     movieListResponse.page?.plus(1) else null
             )
-        }catch (e: Exception){
+        } catch (e: Exception) {
             LoadResult.Error(e)
         }
     }
+
+    override fun getRefreshKey(state: PagingState<Int, Movie>): Int? = state.firstItemOrNull()?.id
 }

build.gradle

@@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "1.4.20"
+    ext.kotlin_version = "1.5.10"
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:4.1.0"
+        classpath "com.android.tools.build:gradle:4.2.1"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong
@@ -17,7 +17,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Wed Aug 05 16:36:47 IST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

gradlew

@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -66,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -109,10 +126,11 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
@@ -138,19 +156,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +177,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"