webview-activity

WebviewActivity.kt

typealias WebViewClientUrlCallback = (url: String?) -> Unit
typealias WebChromeClientLoading = (progress: Int) -> Unit

class WebViewActivity : AppCompatActivity() {

    private val mWebViewClient: WebViewClient by lazy { WebViewClient() }
    private val mWebViewChromeClient: WebChromeClient by lazy { WebChromeClient() }

    @SuppressLint("SetJavaScriptEnabled")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_webview)
        val title = intent.getStringExtra(KEY_TITLE)
        initToolbar(toolbar, title)
        webView.apply {
            isVerticalScrollBarEnabled = false
            settings.domStorageEnabled = true
            webViewClient = mWebViewClient.apply {
                urlCallback = { url -> url?.let { webView.loadUrl(it) } }
            }
            webChromeClient = mWebViewChromeClient.apply {
                progressCallback = { if (it == 100) viewLoading.hide() }
            }
            settings.javaScriptEnabled = true
            intent.getStringExtra(KEY_URL_WEBVIEW)?.let { loadUrl(it) }
        }
    }

    override fun onSupportNavigateUp(): Boolean {
        onBackPressed()
        return true
    }

    override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
            webView.goBack()
            return true
        }
        return super.onKeyDown(keyCode, event)
    }
}

class WebViewClient : WebViewClient() {
    var urlCallback: WebViewClientUrlCallback? = null

    @Suppress("OverridingDeprecatedMember")
    override fun shouldOverrideUrlLoading(view: WebView?, url: String?): Boolean {
        urlCallback?.invoke(url)
        return true
    }

    @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
    override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
        urlCallback?.invoke(request?.url?.toString())
        return true
    }
}

class WebChromeClient : WebChromeClient() {
    var progressCallback: WebChromeClientLoading? = null
    override fun onProgressChanged(view: WebView?, newProgress: Int) {
        progressCallback?.invoke(newProgress)
    }
}