Question

我试图从我的javascript代码调用java android代码中的函数。我收到以下错误：

"Uncaught TypeError: Object [object Object] has no method 'calculateSum'", source: http://www.abelski.com/courses/android/simple.html"

Javascript代码：

<script>
function calc()
{
var a = parseInt(document.myform.num_a.value,10);
var b = parseInt(document.myform.num_b.value,10);
var sum = window.ob.calculateSum(a,b);
document.myform.result.value = sum;
}
</script>

<body>
<form name="myform">
<br/>number 1: <input type="text" name="num_a"/>
<br/>number 2: <input type="text" name="num_b"/>
<br/><input type="button" onclick="calc()" value="+"/>
<br/>result: <input type="text" name="result"/>
</form>
</body>

java android code：

public void onCreate(Bundle savedInstanceState)
    {
        CalculateObject calcObject = new CalculateObject();
        super.onCreate(savedInstanceState);
        WebView webView = new WebView(this);
        webView.loadUrl("http://www.abelski.com/courses/android/simple.html");
        webView.getSettings().setJavaScriptEnabled(true);
        webView.addJavascriptInterface(calcObject, "ob");
        setContentView(webView);
    }
    class CalculateObject
    {
        public int calculateSum(int numA, int numB)
        {
            return numA + numB;
        }
    }

如何从javascript代码调用java方法？

0 个答案: