Updated Gradle and Gradle plugin versions. Enabled artifact minification and resource shrinking (reduces APK size by more than 50%).

app/build.gradle.kts

@@ -1,5 +1,3 @@
-import org.gradle.kotlin.dsl.*
-import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions
 import org.jetbrains.kotlin.konan.properties.hasProperty
 import java.io.FileInputStream
 import java.util.*
@@ -15,7 +13,10 @@ plugins {
 }
 
 val props = Properties().apply {
-  try { load(FileInputStream(rootProject.file("local.properties"))) } catch (e: Exception) {}
+  try {
+    load(FileInputStream(rootProject.file("local.properties")))
+  } catch (e: Exception) {
+  }
 }
 
 androidGitVersion {
@@ -30,9 +31,7 @@ android {
   }
 
   kotlinOptions {
-    (this as KotlinJvmOptions).apply {
+    jvmTarget = JavaVersion.VERSION_1_8.toString()
-      jvmTarget = JavaVersion.VERSION_1_8.toString()
-    }
   }
 
   buildToolsVersion = "29.0.3"
@@ -64,6 +63,10 @@ android {
   buildTypes {
     getByName("debug") {
       isDebuggable = true
+
+      resValue("string", "debug.hostname", props.getProperty("debug.hostname", ""))
+      resValue("string", "debug.username", props.getProperty("debug.username", ""))
+      resValue("string", "debug.password", props.getProperty("debug.password", ""))
     }
 
     getByName("release") {
@@ -71,10 +74,13 @@ android {
         signingConfig = signingConfigs.getByName("release")
       }
 
-      isMinifyEnabled = false
+      isMinifyEnabled = true
+      isShrinkResources = true
 
-      proguardFile(getDefaultProguardFile("proguard-android-optimize.txt"))
+      proguardFiles(
-      proguardFile("proguard-rules.pro")
+        getDefaultProguardFile("proguard-android-optimize.txt"),
+        "proguard-rules.pro"
+      )
     }
   }
 }
@@ -97,9 +103,9 @@ play {
 dependencies {
   implementation(fileTree(mapOf("dir" to "libs", "include" to listOf("*.jar", "*.aar"))))
 
-  implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.71")
+  implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.72")
-  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.6")
+  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.7")
-  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.6")
+  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.7")
 
   implementation("androidx.appcompat:appcompat:1.1.0")
   implementation("androidx.core:core-ktx:1.5.0-alpha01")
@@ -107,7 +113,7 @@ dependencies {
   implementation("androidx.coordinatorlayout:coordinatorlayout:1.1.0")
   implementation("androidx.preference:preference:1.1.1")
   implementation("androidx.recyclerview:recyclerview:1.1.0")
-  implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.0.0")
+  implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.1.0")
   implementation("com.google.android.material:material:1.3.0-alpha01")
   implementation("com.android.support.constraint:constraint-layout:1.1.3")
 

app/proguard-rules.pro

@@ -0,0 +1 @@
+-keep class com.github.apognu.otter.** { *; }

build.gradle.kts

@@ -5,8 +5,8 @@ buildscript {
   }
 
   dependencies {
-    classpath("com.android.tools.build:gradle:3.6.3")
+    classpath("com.android.tools.build:gradle:4.0.0")
-    classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.50")
+    classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.72")
   }
 }
 

gradle.properties

@@ -1,5 +1,6 @@
 org.gradle.jvmargs=-Xmx1536m
 
+kotlin.code.style=official
+
 android.useAndroidX=true
 android.enableJetifier=true
-kotlin.code.style=official

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-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip