Major update of build tools and libraries

app/build.gradle

@@ -1,13 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
-
+    compileSdkVersion 26
     defaultConfig {
         applicationId "xdsopl.robot36"
         minSdkVersion 15
-        targetSdkVersion 23
+        targetSdkVersion 26
         versionCode 36
         versionName "1.35"
         renderscriptTargetApi 18
@@ -22,6 +20,6 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile "com.android.support:support-v4:23.4.0"
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation "com.android.support:support-v4:26.1.0"
 }

build.gradle

@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:3.1.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -15,5 +16,6 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        google()
     }
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sun Feb 05 18:04:23 CET 2017
+#Thu Apr 05 09:21:28 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip