Android WebView 踩坑之路

       // 定位(location)
        settings.setGeolocationEnabled(true);
        String dir = this.getApplicationContext().getDir("database", Context.MODE_PRIVATE).getPath();
        //设置定位的数据库路径
        settings.setGeolocationDatabasePath(dir);
        webView.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onReceivedIcon(WebView view, Bitmap icon) {
                super.onReceivedIcon(view, icon);
            }

            // 处理javascript中的alert
            public boolean onJsAlert(WebView view, String url, String message,
                                     final JsResult result) {
                return true;
            }


            // 处理javascript中的confirm
            public boolean onJsConfirm(WebView view, String url,
                                       String message, final JsResult result) {
                return true;
            }

           
            @Override
            public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
                callback.invoke(origin, true, false);
                super.onGeolocationPermissionsShowPrompt(origin, callback);
            }
        });

WebSettings settings = webView.getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setLoadWithOverviewMode(true);
        settings.setBlockNetworkImage(false);
        settings.setAppCacheEnabled(true);      // 默认值 false
        settings.setLoadsImagesAutomatically(true); // 是否自动加载图片
        // 存储(storage)
        settings.setDomStorageEnabled(true);    // 默认值 false
        settings.setDatabaseEnabled(true);
        settings.setCacheMode(WebSettings.LOAD_DEFAULT);

            @Override
            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
                //super.onReceivedSslError(view, handler, error);
                // handler.proceed();// 接受所有网站证书
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                            view.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
                }
            }

          @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                if (url == null) return false;
                if (url.startsWith("tel:")) {
                    Intent intent = new Intent(Intent.ACTION_VIEW,
                            Uri.parse(url));
                    startActivity(intent);
                    return true;
                }
                try {
                    if (url.startsWith("weixin://") || url.startsWith("alipays://") ||
                            url.startsWith("mailto://") || url.startsWith("tel://")
                        //其他自定义的scheme
                            ) {
                        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
                        startActivity(intent);
                        return true;
                    }
                } catch (Exception e) { //防止crash (如果手机上没有安装处理某个scheme开头的url的APP, 会导致crash)
                    return false;
                }
                view.loadUrl(url);
                return true;
            }