初次是使用AndroidStudio用Kotlin语言新建Android项目

梦里梦外; 2022-06-13 13:43 494阅读 0赞

1.首先我们得有AndroidStudio编译工具如果没有,可以在官网下载:[https://developer.android.google.cn/studio/index.html][https_developer.android.google.cn_studio_index.html]

2.AndroidStudio中要有Kotlin插件如图:![这里写图片描述][SouthEast]  
如果还有不会下在插件的同学们请查看我前面的博客:Android Studio安装插件– [http://blog.csdn.net/male09/article/details/68952350][http_blog.csdn.net_male09_article_details_68952350]  
或者还想了解更多的插件请查看我的:Android Studio插件整理–  
[http://blog.csdn.net/male09/article/details/68952466][http_blog.csdn.net_male09_article_details_68952466]

3.有了插件我们就得把我的的Activity转换成Kotlin  
如图:![这里写图片描述][SouthEast 1]

4.配置Kotlin:  
自动配置有这几个方法:  
a.如果是第一次工具会提示你是否需要配置 如图:  
![这里写图片描述][SouthEast 2]  
你可以点击配置:  
b.双击Shift配置Kotlin:  
![这里写图片描述][SouthEast 3]  
手动配置Kkotlin:  
a.在工程的build.gradle中配置  
1.ext.kotlin\_version = ‘你的kotlin配置版本’  
2.classpath “org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin\_version”

//你通过kotlin直接赋值到xml文件中要配置一下  
3. classpath “org.jetbrains.kotlin:kotlin-android-extensions:$kotlin\_version”  
下面是我的所有配置仅供参考:

// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { 
        ext.kotlin_version = '1.1.3-2'
        repositories {
            jcenter()
        }
        dependencies {
            classpath 'com.android.tools.build:gradle:2.3.3'
            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
            classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
            // NOTE: Do not place your application dependencies here; they belong
            // in the individual module build.gradle files
        }
    }
    
    allprojects {
        repositories {
            jcenter()
        }
    }
    
    task clean(type: Delete) {
        delete rootProject.buildDir
    }

b.在工程的build.gradle中配置  
1.apply plugin: ‘kotlin-android’  
2.apply plugin: ‘kotlin-android-extensions’  
3.compile “org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin\_version”  
下面的代码仅供参考:

apply plugin: 'com.android.application'
    apply plugin: 'kotlin-android'
    apply plugin: 'kotlin-android-extensions'
    
    android {
        compileSdkVersion 26
        buildToolsVersion "26.0.0"
        defaultConfig {
            applicationId "com.hongye.linggu.myapplication"
            minSdkVersion 15
            targetSdkVersion 26
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    }
    
    dependencies {
        compile fileTree(dir: 'libs', include: ['*.jar'])
        androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
            exclude group: 'com.android.support', module: 'support-annotations'
        })
        compile 'com.android.support:appcompat-v7:26.+'
        compile 'com.android.support.constraint:constraint-layout:1.0.2'
        testCompile 'junit:junit:4.12'
        compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    }
    repositories {
        mavenCentral()
    }

注意:  
![这里写图片描述][SouthEast 4]  
应该是一个意思,不是一致呵呵

5.点击同步,或是使用快捷键:**Control + Alt + Y** 了解AndroidStudio快捷键请查看我的博客:官方定义AndroidStudio默认快捷键大全–  
[http://blog.csdn.net/male09/article/details/52004065][http_blog.csdn.net_male09_article_details_52004065]

![这里写图片描述][SouthEast 5]

OK已经配置完成,可以放心编写代码:  
实例:

import android.support.v7.app.AppCompatActivity
    import android.os.Bundle
    import android.widget.Toast
    import kotlinx.android.synthetic.main.activity_main.*
    
    class MainActivity : AppCompatActivity() {
    
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            setContentView(R.layout.activity_main)
    
            //直接给TextVIEW赋值
            tv_main_kotlin.text = "Kotlin赋值成功"
    
            btn_main_kotlin.setOnClickListener {
                showText("测试成功");
    
            }
        }
    
        fun showText(text:String,timeLen:Int = Toast.LENGTH_SHORT){
            Toast.makeText(this,text,timeLen).show();
        }
    }

运行试试:

是还是看不懂可以免费下载查看我上传的资源文件:[http://download.csdn.net/detail/male09/9892383][http_download.csdn.net_detail_male09_9892383]

[https_developer.android.google.cn_studio_index.html]: https://developer.android.google.cn/studio/index.html
[SouthEast]: /images/20220613/66c9ed949ae544608a624f7f281ed211.png
[http_blog.csdn.net_male09_article_details_68952350]: http://blog.csdn.net/male09/article/details/68952350
[http_blog.csdn.net_male09_article_details_68952466]: http://blog.csdn.net/male09/article/details/68952466
[SouthEast 1]: /images/20220613/3935ef64d0054762a454d1cd2bc0c0de.png
[SouthEast 2]: /images/20220613/46e8d6e7c49f4363bc5237dd1c781f5f.png
[SouthEast 3]: /images/20220613/427c33dcd0704c349f98f6812c9dfba6.png
[SouthEast 4]: /images/20220613/40f6569bfd584f8a9138f07feb6e8143.png
[http_blog.csdn.net_male09_article_details_52004065]: http://blog.csdn.net/male09/article/details/52004065
[SouthEast 5]: /images/20220613/37c20e4d54a544758996d6a2a2d1a546.png
[http_download.csdn.net_detail_male09_9892383]: http://download.csdn.net/detail/male09/9892383