android WebView（四）與html互動，androidwebview
WebView如何與html相互互動
很多時候WebView需要和html進行互動，要麼需要通過Java代碼控制頁面活動，要麼就是通過js觸發Java代碼，WebView提供了這種機制。
首先來看一下我們需要互動的html代碼吧：
<!DOCTYPE html><html> <head> <title>MyHtml.html</title> </head> <body> <br> <br>大家晚上好 <br> <br>大家晚上好 <br> <br>大家晚上好 <br> <input type="button" value="測試" onclick="javascript:window.handler.show(document.body.innerHTML);" /> </body></html>
webView.loadUrl("file:///android_asset/MyHtml.html");webView.getSettings().setJavaScriptEnabled(true);webView.setWebViewClient(new WebViewClient() {@Overridepublic void onPageFinished(WebView view, String url) {Toast.makeText(WebViewActivity.this, "網頁載入完成", 0).show();view.loadUrl("javascript:window.handler.show(document.body.innerHTML);");super.onPageFinished(view, url);}});
class Handler {public void show(String data) {new AlertDialog.Builder(WebViewActivity.this).setMessage(data).create().show();}}
webView.addJavascriptInterface(new Handler(), "handler");
這句話就是用來綁定介面的。
運行結果如下：
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