這兩天看都在討論Kotlin
,也來試試,感覺不錯,是更精簡方便了。重要是可以用IDE,這兩天看Python頭疼,但它卻自動轉換!!衝這一點就牛B,更別說更方便響應式編寫
給Android Studio安裝Kotlin
file->Setitngs->Plugins->搜索Kotlin
進行安裝->重啓AS
新建Android Studio工程
將MainActivity轉換爲Kontlin語言
ctrl+shift+a->輸入Convert Java F
,選擇Convert Java File to Kontlin File
ctrl+shift+a->輸入configure k
,選擇Configure Kontlin in Project
這兩條更新要一些時間,更新完之後就可以運行了
Code
- MainActivity
package com.xuie.kotlindemo
import android.os.Bundle
import android.support.design.widget.FloatingActionButton
import android.support.design.widget.Snackbar
import android.support.v7.app.AppCompatActivity
import android.support.v7.widget.Toolbar
import android.view.Menu
import android.view.MenuItem
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val toolbar = findViewById(R.id.toolbar) as Toolbar
setSupportActionBar(toolbar)
val fab = findViewById(R.id.fab) as FloatingActionButton
fab.setOnClickListener { view -> Snackbar.make(view, "Replace with your own action, I'm kotlin", Snackbar.LENGTH_LONG).setAction("Action", null).show() }
}
override fun onCreateOptionsMenu(menu: Menu): Boolean {
// Inflate the menu; this adds items to the action bar if it is present.
menuInflater.inflate(R.menu.menu_main, menu)
return true
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
val id = item.itemId
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true
}
return super.onOptionsItemSelected(item)
}
}
- app/build.gradle
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "com.xuie.kotlindemo"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
}
buildscript {
ext.kotlin_version = '1.0.0'
repositories {
mavenCentral()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
repositories {
mavenCentral()
}
參考
https://kotlinlang.org/docs/tutorials/kotlin-android.html
http://blog.jetbrains.com/kotlin/2013/08/working-with-kotlin-in-android-studio/