This changes make it runnable in latest android studio and new gradle versions.

app/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 26
+    buildToolsVersion '27.0.3'
 
     defaultConfig {
         applicationId "com.yalantis.beamazingtoday"
         minSdkVersion 16
-        targetSdkVersion 23
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
     }
@@ -20,7 +20,9 @@ android {
 }
 
 dependencies {
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile 'com.android.support:appcompat-v7:23.4.0'
-    compile project(':library')
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    implementation 'com.android.support:appcompat-v7:26.0.2'
+    implementation project(':library')
+//    compile 'com.github.yalantis:todolist:v1.0.1'
+
 }

app/src/main/AndroidManifest.xml

@@ -3,7 +3,7 @@
 
     <application
         android:allowBackup="true"
-        android:icon="@mipmap/ic_launcher_xxxhdpi"
+        android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme">
 

build.gradle

@@ -1,20 +1,26 @@
 buildscript {
     repositories {
         jcenter()
+        maven {
+            url "https://maven.google.com"
+        }
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
-        classpath 'com.jakewharton:butterknife-gradle-plugin:8.2.1'
+        classpath 'com.android.tools.build:gradle:3.1.1'
         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
+        classpath 'com.jakewharton:butterknife-gradle-plugin:8.4.0'
     }
 }
 
 allprojects {
     repositories {
         jcenter()
+        google()
+        maven { url "https://jitpack.io" }
     }
 }
 
 task clean(type: Delete) {
     delete rootProject.buildDir
-}
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Mon Aug 22 08:24:47 EEST 2016
+#Tue Apr 17 14:05:29 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-4.7-all.zip

library/build.gradle

@@ -1,14 +1,13 @@
 apply plugin: 'com.android.library'
-apply plugin: 'android-apt'
 apply plugin: 'com.jakewharton.butterknife'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 26
+    buildToolsVersion '27.0.3'
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 23
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
     }
@@ -21,17 +20,17 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:23.4.0'
-    compile 'com.android.support:recyclerview-v7:23.4.0'
-    compile 'com.android.support:design:23.4.0'
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:26.0.2'
+    api 'com.android.support:recyclerview-v7:26.0.2'
+    api 'com.android.support:design:26.0.2'
 
     //RX
-    compile('io.reactivex:rxandroid:1.1.0') {
+    implementation('io.reactivex:rxandroid:1.1.0') {
         exclude module: 'rxjava'
     }
-    compile 'io.reactivex:rxjava:1.1.0'
-    compile 'com.jakewharton.rxbinding:rxbinding:0.4.0'
-    compile 'com.jakewharton:butterknife:8.2.1'
-    apt 'com.jakewharton:butterknife-compiler:8.2.1'
+    implementation 'io.reactivex:rxjava:1.1.0'
+    implementation 'com.jakewharton.rxbinding:rxbinding:0.4.0'
+    implementation 'com.jakewharton:butterknife:8.4.0'
+    annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'
 }