[kotlin] MVP패턴

1. 기본구조

2. Contract Interface

interface MainContract{

    interface View{
        fun initWebView(startURL: String)

        fun initWebViewClient()

        fun showArticleActivity(aid: String, oid: String)
    }


    interface Presenter{
        fun start()

        fun isHaveOidAid(url: String): Boolean
    }
}

view와 presenter를 설계한다.

3. Presenter Class

class MainPresenter: MainContract.Presenter {

    private var view: MainContract.View

    constructor(view: MainContract.View){
        this.view = view
    }

    override fun start() {
        val START_URL = "https://m.naver.com/?menu=ENT&contentOnly=YES&newMain=YES/"
        view.initWebView(START_URL)
        view.initWebViewClient()
    }

    override fun isHaveOidAid(url: String): Boolean {

        //주소에 oid와 aid값이 있는지 확인하고 Redirect유무 반환
        val uri = Uri.parse(url)
        val aid=uri.getQueryParameter("aid")
        val oid = uri.getQueryParameter(("oid"))

        if( !aid.isNullOrEmpty() && !oid.isNullOrEmpty() ){
            view.showArticleActivity(aid, oid)
            return true
        }
        return false
    }
}

참고로 생성자 부분은 아래와 같이 바꿀 수 있다.

class MainPresenter(var view: MainContract.View): MainContract.Presenter {

4. View (MainActivity.kt)

class MainActivity : AppCompatActivity(), MainContract.View {

    //Presenter
    private lateinit var presenter: MainContract.Presenter

    private var isPageLoaded: Boolean = false

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        //Presenter초기화
        presenter = MainPresenter(this)
        presenter.start()

    }

    override fun initWebView(startURL: String){

        // 웹뷰의 인스턴스를 가져온다
        val settings = main_webview.settings

        settings?.run{
            // 자바스크립트 사용가능 유무
            javaScriptEnabled = true

            // cache유무
            setAppCacheEnabled(true)
            cacheMode = WebSettings.LOAD_DEFAULT
            setAppCachePath(cacheDir.path)

            // zoom
            setSupportZoom(true)
            builtInZoomControls = true
            displayZoomControls = true

            // 텍스트만 zoom
            textZoom = 125

            // 웹뷰에서 이미지 보지 않기설정
            blockNetworkImage = false
            // 웹뷰가 이미지의 리소스를 로드할 것인지 유무
            loadsImagesAutomatically = true

            // More web view settings
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                safeBrowsingEnabled = true  // api 26
            }

            //settings.pluginState = WebSettings.PluginState.ON
            useWideViewPort = true
            loadWithOverviewMode = true
            javaScriptCanOpenWindowsAutomatically = true
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
                settings.mediaPlaybackRequiresUserGesture = false
            }

            // More optional settings, you can enable it by yourself
            domStorageEnabled = true
            setSupportMultipleWindows(true)
            loadWithOverviewMode = true
            allowContentAccess = true
            setGeolocationEnabled(true)

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                allowUniversalAccessFromFileURLs = true
            }

            allowFileAccess = true
        }


        main_webview.run{
            // webView settings
            fitsSystemWindows = true

            // SDK version 19이상이면 하드웨어가속, 그렇지 않으면 소프트웨어 가속
            setLayerType(View.LAYER_TYPE_HARDWARE, null)

            //웹뷰 로드
            loadUrl(startURL)
        }
    }

    override fun initWebViewClient(){

        //터치한 url이 Article인 경우 ArticleActivity를 띄운다
        main_webview.webViewClient = object : WebViewClient() {

            //API 24이상
            override fun shouldOverrideUrlLoading(view: WebView?, url: String): Boolean {
                return presenter.isHaveOidAid(url)
            }

            //API 23이하
            override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
                return presenter.isHaveOidAid(request?.url.toString())
            }
        }
    }

    override fun showArticleActivity(aid: String, oid: String){

        //targetURL이 article인 경우 이곳을 통해 ArticleActivity를 띄운다
        var iT = Intent(this, ArticleActivity::class.java)
        iT.putExtra("OID", oid)
        iT.putExtra("AID", aid)
        startActivity(iT)
    }

}