android webview常用代码

fun initWebviewSettgings(mWebView: WebView) {
    val webSetting: WebSettings = mWebView.getSettings()
    webSetting.javaScriptEnabled = true
    webSetting.defaultTextEncodingName = "UTF-8"
    webSetting.javaScriptCanOpenWindowsAutomatically = true
    webSetting.allowFileAccess = true
    //自适应屏幕
    webSetting.layoutAlgorithm = WebSettings.LayoutAlgorithm.NARROW_COLUMNS
    // 设置可以支持缩放
    webSetting.setSupportZoom(true)
    // 设置出现缩放工具
    webSetting.builtInZoomControls = true
    //扩大比例的缩放
    webSetting.useWideViewPort = true
    webSetting.setSupportMultipleWindows(true)
    // webSetting.setLoadWithOverviewMode(true);
    webSetting.setAppCacheEnabled(true)
    // webSetting.setDatabaseEnabled(true);
    // webSetting.setDatabaseEnabled(true);
    webSetting.domStorageEnabled = true // 打开本地缓存提供JS调用,至关重要

    webSetting.setGeolocationEnabled(true)
    //        webSetting.setAppCacheMaxSize(Long.MAX_VALUE)
    // webSetting.setPageCacheCapacity(IX5WebSettings.DEFAULT_CACHE_CAPACITY);
    webSetting.pluginState = WebSettings.PluginState.ON_DEMAND
    // webSetting.setRenderPriority(WebSettings.RenderPriority.HIGH);
    // webSetting.setRenderPriority(WebSettings.RenderPriority.HIGH);
    webSetting.cacheMode = WebSettings.LOAD_NO_CACHE
    mWebView.setBackgroundColor(85621)
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP) {
        webSetting.mixedContentMode = android.webkit.WebSettings.MIXED_CONTENT_ALWAYS_ALLOW
    }
}
//-------------------------------- WebViewClient

// 拦截替换加载 资源  js,image  出错可以在  onReceivedHttpError 的request里看到

// api>14有效
override fun shouldInterceptRequest(p0: WebView, p1: String)

// api>21有效
override fun shouldInterceptRequest(p0: WebView, p1: WebResourceRequest)

private fun handlerJsCache(
    url: String?
): WebResourceResponse? {
    try {
        if (url != null) {
            if (url.contains("api.map.baidu.com")) {
                if (BuildConfig.DEBUG) {
                    LogUtils.w("----------------->>1 url = ${url}")
                }
                return WebResourceResponse()
            } else {
                if (url.endsWith(".js")) {
                    val uri = Uri.parse(url)
                    val fileName = uri.getLastPathSegment()
                    for (assetsJs in jsAssetList) {
                        if (fileName.equals(assetsJs)) {
                            return WebResourceResponse(
                                "application/javascript", "UTF-8", 200, "", paramMapJs, assets.open(assetsJs)
                            )
                        }
                    }
                }
            }
        }
    } catch (e: Exception) {
        e.printStackTrace()
    }
    return null
}