kotlin anko 第一个项目

官方提供 demo 提示一下错误

org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':classpath

按照提示修改 project build.gradle

ext.kotlin_version = '1.1.2' --> 1.2.31 // 我本地的kotlin 下载的插件版本

classpath 'com.android.tools.build:gradle:2.4.0-alpha7' --> com.android.tools.build:gradle:3.0.1

继续出错：

Unable to find method 'com.android.build.gradle.internal.variant.BaseVariantData.getOutputs()Ljava/util/List;'.
Possible causes for this unexpected error include:<ul><li>Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
Re-download dependencies and sync project (requires network)</li><li>The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
Stop Gradle build processes (requires restart)</li><li>Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.</li></ul>In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.
下载不成功对应的 .jar 包。重复下载一直提示错误，修改了 ext.kotlin_version = '1.1.2' --》 ext.kotlin_version = '1.2.31' 工程终于不报错。最终 project bugild.gradle 配置。

buildscript {
    ext.kotlin_version = '1.2.31'
    ext.anko_version = '0.10.0-beta-2'

    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url "http://dl.bintray.com/kotlin/kotlin-dev" }
    }
}

以为已经可以直接运行然而并没有。run 以后又出一下错误：

gravity = CENTER 报错，布局中直接使用错误，应该替换为 setGravity(Gravity.CENTER)

后续错误又来：

E:\android_kotlin\anko-example\app\src\main\java\org\example\ankodemo\RichView.kt: (59, 79): None of the following functions can be called with the arguments supplied:
public constructor LinearLayout(p0: Context!) defined in android.widget.LinearLayout
public constructor LinearLayout(p0: Context!, p1: AttributeSet!) defined in android.widget.LinearLayout

注释三个参数的 constructor 方法。代码终于可以运行。修改后自定义 View 代码。刚学习，不清楚具体原因后续有时间好好找找原因。

class RichView : LinearLayout {
    private lateinit var image: ImageView
    private lateinit var text: TextView

    private fun init() = AnkoContext.createDelegate(this).apply {
        padding = dip(24)
        setGravity(Gravity.CENTER)
        image = imageView(imageResource = R.drawable.kotlin) {
            onClick { startAnimation() }
//            gravity = CENTER_VERTICAL
            padding = dip(8)
            layoutParams = LinearLayout.LayoutParams(dip(48), dip(48))
        }

        text = textView("Anko Rich view") {
            textSize = 19f
        }

        startAnimation()
    }

    private fun startAnimation() {
        if (image.animation != null) return

        image.startAnimation(ScaleAnimation(1f, 1.3f, 1f, 1.3f,
                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f
        ).apply {
            repeatCount = 1
            repeatMode = Animation.REVERSE
            duration = 1000
        })
    }

    constructor(context: Context?) : super(context) {
        init()
    }

    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs) {
        init()
    }

    /*constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
        init()
    }*/
}

@Suppress("NOTHING_TO_INLINE")
inline fun ViewManager.myRichView(theme: Int = 0) = myRichView({}, theme)
inline fun ViewManager.myRichView(init: RichView.() -> Unit, theme: Int = 0) = ankoView(::RichView, theme, init)

自己写了一个 demo 页面

class HelloAnkoActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        HelloAnkoActivityUI().setContentView(this)
    }
}

class HelloAnkoActivityUI : AnkoComponent<HelloAnkoActivity> {
    override fun createView(ui: AnkoContext<HelloAnkoActivity>) = with(ui) {
       // TODO("not implemented") //To change body of created functions use File | Settings | File Templates.

        verticalLayout {
            padding = dip(15)
            backgroundColor = Color.rgb(88, 88, 88)

            val tv = textView {
                text = "hello Anko"
                textSize = resources.getDimension(R.dimen.abc_text_size_medium_material)
                textColor = ContextCompat.getColor(context, R.color.abc_background_cache_hint_selector_material_dark)
            }
            tv.setOnClickListener {
                val srt = "ssss${tv.text}"
                print(srt)
            }
            button {
                text = "Click Toast text"
                onClick {
                    toast(tv.text)
                }
            }
            button{
                text = "radioButton"
                textColor = Color.YELLOW
                onClick {
                    Snackbar.make(view, "snackbar${text}", Snackbar.LENGTH_LONG).setAction("返回") {
                        ui.owner.finish()
                    }.show()
                }
            }
        }      
    }
}

kotlin anko 第一个项目

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