一手遮天 Android - kotlin: hello world
示例如下:
/kotlin/HelloWorld.kt
package com.webabcd.androiddemo.kotlin
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.webabcd.androiddemo.R
import kotlinx.android.synthetic.main.activity_kotlin_helloworld.*
class HelloWorld : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_kotlin_helloworld)
button1.setOnClickListener {
textView1.text = "hello world";
}
}
}
/layout/activity_kotlin_helloworld.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAllCaps="false"
android:text="click me"/>
</LinearLayout>