javascript - 找不到 webview javascript 接口(interface)函数

Question

我正在尝试将 json 数据从 java 传递到我的 WebView 这是我的代码:

界面:

public class ChartsJavaScriptInterface {
public ChartsJavaScriptInterface() {

}

    public String getData(){
        String s = "[ {date: 'A', frequency: .00100, date: '1-May-11', close: 1}," +
                    "{date: 'B', frequency: .01492, date: '2-May-14', close: 2}," +
                    "{date: 'C', frequency: .02782, date: '3-May-14', close: 3}," +
                    "{date: 'D', frequency: .04253, date: '4-May-15', close: 5}," +
                    "{date: 'D', frequency: .04253, date: '5-May-15', close: 4}," +
                    "{date: 'D', frequency: .04253, date: '7-May-15', close: 2},]";


        return s;
    }

}

Activity :

    chartsView = (WebView) rootView.findViewById(R.id.charts_chart_view);

    chartsView.addJavascriptInterface(new ChartsJavaScriptInterface(), "chartInterface");
    chartsView.setWebChromeClient(new WebChromeClient());
    chartsView.getSettings().setJavaScriptEnabled(true);
    chartsView.setInitialScale(30);
    chartsView.getSettings().setBuiltInZoomControls(true);
    chartsView.getSettings().setLoadWithOverviewMode(true);
    chartsView.getSettings().setUseWideViewPort(true);
    chartsView.loadUrl("file:///android_asset/line.html");

html文件:

....
draw(JSON.parse(chartInterface.getData()));
....

日志猫:08-25 13:34:57.397:E/Web 控制台(19809):未捕获的类型错误:对象 [object Object] 在 file:///android_asset/line.html:345 没有方法 'getData'

我的错误是什么？请帮忙？

谢谢，宜兰

Answer 1

我相信你忘了添加 JavascriptInterface 注释:

@JavascriptInterface
public String getData(){
    String s = "[ {date: 'A', frequency: .00100, date: '1-May-11', close: 1}," +
                "{date: 'B', frequency: .01492, date: '2-May-14', close: 2}," +
                "{date: 'C', frequency: .02782, date: '3-May-14', close: 3}," +
                "{date: 'D', frequency: .04253, date: '4-May-15', close: 5}," +
                "{date: 'D', frequency: .04253, date: '5-May-15', close: 4}," +
                "{date: 'D', frequency: .04253, date: '7-May-15', close: 2},]";
    return s;
}

请看here引用如何在 JS 和 Android

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