some gradle changes

app/build.gradle

@@ -1,8 +1,9 @@
 apply plugin: 'com.android.application'
 
 android {
+
     compileSdkVersion project.ext.compileSdkVersion
-    buildToolsVersion project.ext.buildToolsVersion
+    // buildToolsVersion is optional because the plugin uses a recommended version by default
 
     defaultConfig {
         applicationId project.ext.applicationId
@@ -14,21 +15,20 @@ android {
         vectorDrawables.useSupportLibrary = true
         resConfigs "en", "de", "id", "it", "ja", "nb-rNO", "nl"
     }
+
     buildTypes {
+
         release {
             minifyEnabled true
             shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
-        debug {
-//            minifyEnabled true
-//            shrinkResources true
-//            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
+
     }
 }
 
 dependencies {
+
     implementation fileTree(include: ['*.jar'], dir: 'libs')
 
     implementation "androidx.appcompat:appcompat:$appcompatVersion"
@@ -39,4 +39,5 @@ dependencies {
 
     implementation "org.osmdroid:osmdroid-android:$osmdroidVersion"
     implementation "com.google.code.gson:gson:$gsonVersion"
+
 }

build.gradle

@@ -1,31 +1,35 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+
     repositories {
         jcenter()
         google()
     }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.0-alpha13'
 
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.2.0'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
+
 }
 
 allprojects {
+
     repositories {
         google()
         jcenter()
     }
+
     project.ext {
         applicationId = 'org.y20k.trackbook'
         versionCode = 27
         versionName = '1.1.11'
-        minSdkVersion = 22
+
         compileSdkVersion = 28
         targetSdkVersion = 27
-        buildToolsVersion = '28.0.3'
+        minSdkVersion = 22
 
         constraintlayoutVersion = '1.1.3'
         materialVersion = "1.0.0"