Merge branch 'master_signhere' of git.kdan.cc:wayne.huang/KdanLoginRegisterUI

build.gradle

@@ -44,6 +44,7 @@ android {
 
 dependencies {
     // kotlin
+    api 'androidx.core:core-ktx:1.1.0'
     api "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 
     api 'androidx.appcompat:appcompat:1.1.0'