Fix starter code

app/src/main/AndroidManifest.xml

@@ -27,7 +27,7 @@
         <activity
             android:name=".DetailActivity"
             android:parentActivityName=".MainActivity" />
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity" android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

build.gradle

@@ -19,16 +19,16 @@ buildscript {
         appcompat_version = "1.2.0"
         constraintlayout_version = "2.0.2"
         core_ktx_version = "1.3.2"
-        kotlin_version = "1.3.72"
+        kotlin_version = "1.6.0"
         material_version = "1.2.1"
         nav_version = "2.3.1"
     }
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:7.0.4'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version"
 
@@ -40,7 +40,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip