Use kotlin to extend plugins/dependencies to simplify code (after the latest version 4.0, this plugin has been deprecated, so please choose to learn, mainly to understand.)

1. Add a plugin to replace findViewById(XXX);

id 'kotlin-android-extensions'

Replaces findViewById(XXX)

You can use the control id on the View directly in the kotlin code.

2. Extension plug-in anko

A lot of extension functions are added inside

For example, toast can be simplified.

build.gradle(Module):

anko_version is defined in build.gradle(project)ext.anko_version='0.10.8'implementation "org.jetbrains.anko:anko-common:$anko_version"

activity_main2.xml

MainActivity2.kt

Effect:

After the latest version 4.0, this plug-in has been deprecated, so please learn selectively and focus on understanding.

The use of the ViewBinding method has appeared since then, and the use of this method will be updated in the later stage.