update

Author: louisgeek

app/build.gradle

@@ -28,7 +28,7 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.1'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
+    implementation project(':library')
     implementation 'com.sun.mail:android-mail:1.6.0'
     implementation 'com.sun.mail:android-activation:1.6.0'
-    implementation project(':library')
 }

library/build.gradle

@@ -25,9 +25,9 @@ android {
 }
 
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
-
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.1'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'