Update AGP, Gradle, build repositories

build.gradle

@@ -1,23 +1,29 @@
 buildscript {
   repositories {
-    jcenter()
+    mavenCentral()
     google()
   }
   dependencies {
-    classpath 'com.android.tools.build:gradle:3.1.1'
+    classpath 'com.android.tools.build:gradle:3.3.2'
   }
 }
 
 allprojects {
   repositories {
-    jcenter()
+    mavenCentral()
     google()
+    jcenter {
+      // Required for a dependency of Android lint.
+      content {
+        includeGroup 'org.jetbrains.trove4j'
+      }
+    }
   }
 }
 
 ext {
   minSdkVersion = 15
-  compileSdkVersion = 27
+  compileSdkVersion = 28
 
   junit = 'junit:junit:4.12'
   truth = 'com.google.truth:truth:0.40'

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -28,7 +28,7 @@ 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"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"

sample/build.gradle

@@ -17,7 +17,7 @@ android {
   defaultConfig {
     applicationId 'com.jakewharton.threetenabp.sample'
     minSdkVersion rootProject.ext.minSdkVersion
-    targetSdkVersion 27
+    targetSdkVersion 28
     versionCode 1
     versionName '1.0'
 

threetenabp/src/main/java/com/jakewharton/threetenabp/AndroidThreeTen.java

@@ -20,6 +20,6 @@ public static void init(Context context) {
   }
 
   private AndroidThreeTen() {
-    throw new AssertionError("No instances.");
+    throw new AssertionError();
   }
 }