Android WebView使用javascript更改字体大小

Question

I have some annoying problem while trying to set the font size inside the webview using javascript.

tvWebView.loadData(jsonObject.optString("body_1"), "text/html", "UTF-8");
    tvWebView.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            tvWebView.loadUrl("javascript:(document.body.style.fontSize ='20pt');");
        }
    });

Instead of changing the font size I see the "20pt" string and nothing else inside the webview

Answer 1

get web setting and change font size.

WebSettings webSettings = webView.getSettings();

webSettings.setDefaultFontSize(20);