只需加兩處設定：
1

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
        }

2

webView.setWebViewClient(new WebViewClient(){
            @Override
            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
                handler.proceed();
            }
        });