javascript接口在5.0以下版本中不起作用 我使用了下面的代码来避免webview扩展时出现空白 它在5.0中运行良好

为了避免错误，我添加了suppresslint@suppresslint（{“SetJavaScriptEnabled”，“JavascriptInterface”}）

但安卓4.2、4.3设备仍存在空白

有人能建议我解决这个问题吗

web_content_url.setWebViewClient(new WebViewClient() {
                public boolean shouldOverrideUrlLoading(WebView view, String url) {
                    Log.i(TAG, "Processing webview url click...");
                    pbar2.setVisibility(view.VISIBLE);
                    view.loadUrl(s[1]);
                    return true;
                }

                public void onPageFinished(WebView view, String url) {
                    Log.i(TAG, "Finished loading URL: " + url);
                    pbar2.setVisibility(view.GONE);
                    view.loadUrl("javascript:MyApp.resize(document.body.getBoundingClientRect().height)");
                    super.onPageFinished(view, url);

                }

                public void onReceivedError(WebView view, int errorCode,
                        String description, String failingUrl) {
                    Log.e(TAG, "Error: " + description);
                    pbar2.setVisibility(view.VISIBLE);
                }

            });
            web_content_url.addJavascriptInterface(this, "MyApp");