webView基本使用

1. 启用JavaScript

WebSettings settings = mWebView.getSettings();
settings.setJavaScriptEnabled(true);
//settings.setAllowFileAccess(true);
//settings.setAllowFileAccessFromFileURLs(true);
//settings.setAllowContentAccess(true);
settings.setDatabaseEnabled(true);
settings.setDomStorageEnabled(true);

2. 拦截加载过程中指定的url或者广告，重写​​WebViewClient::shouldInterceptRequest​​

mWebView.setWebViewClient(new WebViewClient(){
           @Override
           public void onPageFinished(WebView view, String url) {
               super.onPageFinished(view, url);
               if(mRefreshLayout != null){
                   mRefreshLayout.finishRefresh();
               }
           }

            @Nullable
            @Override
            public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
                Uri uri = request.getUrl();
                //过滤基本的广告url和替换图片
                if(uri.toString().equals("https://xxx.png")){
                    try {
                        InputStream localCopy = getAssets().open("empty.png");
                        return new WebResourceResponse("image/png", "UTF-8", localCopy);
                    }
                    catch (Exception e){
                        return new WebResourceResponse(null,null,null);
                    }


                }
                if (isAds(uri)){
                    return new WebResourceResponse(null,null,null);
                }
                return super.shouldInterceptRequest(view, request);
            }

            @Override
            public void onLoadResource(WebView view, String url) {
                super.onLoadResource(view, url);
                Log.i("tUrl", url);
            }
        });

其中Assert的目录和java，res同级

3. 监控url加载进度,重写​​WebChromeClient::onProgressChanged​​

mWebView.setWebChromeClient(new WebChromeClient(){
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                super.onProgressChanged(view, newProgress);
            }
        });

4. 拦截href跳转,重写​​WebViewClient::shouldOverrideUrlLoading​​

public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
               if (request.getUrl().toString().equals("https://xxx")){
                   //取消当前链接
                   return true;
                }
                return super.shouldOverrideUrlLoading(view, request);
            }