android.webkit.WebView#enableSlowWholeDocumentDraw ( )源码实例Demo

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        WebView.enableSlowWholeDocumentDraw();
    }
    setContentView(R.layout.activity_web_view);
    setActionBarTitle("WebView Capture");
    webView=findViewById(R.id.webView);
    webView.loadUrl("https://github.com/HelloHuDi");
    webView.setWebViewClient(new WebViewClient(){
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    });
}
 

@SuppressLint({"AddJavascriptInterface", "SetJavaScriptEnabled"})
    private void init(Context context) {
        if (!isInEditMode()) {
            this.mContext = context;
//            setOrientation(VERTICAL);
            if (VERSION.SDK_INT >= 21) {
                WebView.enableSlowWholeDocumentDraw();
            }
            this.mWebView = new WebView(this.mContext);
            this.mWebView.getSettings().setJavaScriptEnabled(true);
            this.mWebView.setVerticalScrollBarEnabled(false);
            this.mWebView.setHorizontalScrollBarEnabled(false);
            this.mWebView.addJavascriptInterface(new JavaScriptInterface(this), "handler");
            this.mWebView.setWebViewClient(new MdWebViewClient(this));
            this.mWebView.loadUrl("file:///android_asset/markdown.html");
            addView(this.mWebView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        }
    }
 

@SuppressLint({"AddJavascriptInterface", "SetJavaScriptEnabled"})
    private void init(Context context) {
        if (!isInEditMode()) {
            this.mContext = context;
//            setOrientation(VERTICAL);
            if (VERSION.SDK_INT >= 21) {
                WebView.enableSlowWholeDocumentDraw();
            }
            this.mWebView = new WebView(this.mContext);
            this.mWebView.getSettings().setJavaScriptEnabled(true);
            this.mWebView.setVerticalScrollBarEnabled(false);
            this.mWebView.setHorizontalScrollBarEnabled(false);
            this.mWebView.addJavascriptInterface(new JavaScriptInterface(this), "handler");
            this.mWebView.setWebViewClient(new MdWebViewClient(this));
            this.mWebView.loadUrl("file:///android_asset/markdown.html");
            addView(this.mWebView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        }
    }
 

public WebScraper(final Context context) {
    this.context = context;
    web = new WebView(context);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        WebView.enableSlowWholeDocumentDraw();
    }
    handler = new Handler();
    web.getSettings().setJavaScriptEnabled(true);
    web.getSettings().setDomStorageEnabled(true);//added
    web.getSettings().setBlockNetworkImage(true);
    web.getSettings().setLoadsImagesAutomatically(false);
    //
    // web.getSettings().setLoadWithOverviewMode(true);
    // web.getSettings().setUseWideViewPort(true);
    //
    // web.getSettings().setSupportZoom(true);
    // web.getSettings().setBuiltInZoomControls(true);
    // web.getSettings().setDisplayZoomControls(false);
    //
    // web.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
    // web.setScrollbarFadingEnabled(false);
    JSInterface jInterface = new JSInterface(context);
    web.addJavascriptInterface(jInterface, "HtmlViewer");
    userAgent = web.getSettings().getUserAgentString();
    web.setWebViewClient(new WebViewClient() {
        public void onPageFinished(WebView view, String url) {
            // forward the page loaded event-
            if (onpageloadedlistener != null) {
                onpageloadedlistener.loaded(url);
            }

            web.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
            web.layout(0, 0, web.getMeasuredWidth(), web.getMeasuredHeight());
            web.setDrawingCacheEnabled(true);
        }
    });
}
 

@SuppressLint({"AddJavascriptInterface", "SetJavaScriptEnabled"})
private void init() {
    if (Build.VERSION.SDK_INT >= 21) WebView.enableSlowWholeDocumentDraw();
    this.getSettings().setJavaScriptEnabled(true);
    this.setVerticalScrollBarEnabled(true);
    this.setHorizontalScrollBarEnabled(false);
    this.addJavascriptInterface(this, "jsCallback");
    this.webViewClient = new MdWebViewClient(onLoadingFinishListener, onAttachmentClickedListener);
    this.setWebViewClient(webViewClient);
}
 

private void initView() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        WebView.enableSlowWholeDocumentDraw();
    }

    mWebView.getSettings().setJavaScriptEnabled(true);
    mWebView.setVerticalScrollBarEnabled(true);
    mWebView.setHorizontalScrollBarEnabled(false);
    mWebView.setWebViewClient(new MyWebViewClient());
    mWebView.setWebChromeClient(new MyWebChromeClient());
    mWebView.loadUrl(DEFAULT_PATH);
}
 

protected void initView() {
    //http://stackoverflow.com/questions/30078157/webview-draw-not-properly-working-on-latest-android-system-webview-update
    if (Build.VERSION.SDK_INT >= 21)
        WebView.enableSlowWholeDocumentDraw();
    setContentView(R.layout.activity_test_webview);
    $(R.id.btn_webview).setOnClickListener(this);
    $(R.id.btn_screenshot).setOnClickListener(this);
}