Javascript 检测android webview中的html按钮单击

因此，在我的Android应用程序中，我打开了一个由表单和按钮（提交）组成的webview。按钮元素如下所示：

{
...

myWebview.getSettings().setJavaScriptEnabled(true);
myWebview.getSettings().setDomStorageEnabled(true);
myWebview.addJavascriptInterface(new MyJavaScriptInterface(this), "ButtonCheck");

myWebview.setWebViewClient(new WebViewClient() {
    @Override
    public void onPageFinished(WebView view, String url) {
        loadMyEvent(clickListener());
    }

    private void loadMyEvent(String javascript){
        myWebview.loadUrl("javascript:"+javascript);
    }

    private String clickListener(){
        return getMyButtons()+ "for(var i = 0; i < buttons.length; i++){\n" +
                "\tbuttons[i].onclick = function(){ console.log('click worked.'); ButtonCheck.boundMethod('button clicked'); };\n" +
                "}";
    }

    private String getMyButtons(){
        return "var buttons = document.getElementsByClassName('your-button-class'); console.log(buttons.length + ' buttons');\n";
    }
});

myWebview.loadUrl("http://....");

...
}


class MyJavaScriptInterface {

    private Context context;

    MyJavaScriptInterface(Context ctx) {
        context = ctx;
    }

    @JavascriptInterface
    public void boundMethod(String html) {
        //Check internet connection
    }

}

---

保存

您必须使用如下javascript界面：

{
...

myWebview.getSettings().setJavaScriptEnabled(true);
myWebview.getSettings().setDomStorageEnabled(true);
myWebview.addJavascriptInterface(new MyJavaScriptInterface(this), "ButtonCheck");

myWebview.setWebViewClient(new WebViewClient() {
    @Override
    public void onPageFinished(WebView view, String url) {
        loadMyEvent(clickListener());
    }

    private void loadMyEvent(String javascript){
        myWebview.loadUrl("javascript:"+javascript);
    }

    private String clickListener(){
        return getMyButtons()+ "for(var i = 0; i < buttons.length; i++){\n" +
                "\tbuttons[i].onclick = function(){ console.log('click worked.'); ButtonCheck.boundMethod('button clicked'); };\n" +
                "}";
    }

    private String getMyButtons(){
        return "var buttons = document.getElementsByClassName('your-button-class'); console.log(buttons.length + ' buttons');\n";
    }
});

myWebview.loadUrl("http://....");

...
}


class MyJavaScriptInterface {

    private Context context;

    MyJavaScriptInterface(Context ctx) {
        context = ctx;
    }

    @JavascriptInterface
    public void boundMethod(String html) {
        //Check internet connection
    }

}

{
...
myWebview.getSettings（）.setJavaScriptEnabled（true）；
myWebview.getSettings（）.setDomStorageEnabled（true）；
addJavascriptInterface（新的MyJavaScriptInterface（this），“ButtonCheck”）；
myWebview.setWebViewClient（新的WebViewClient（）{
@凌驾
公共void onPageFinished（WebView视图，字符串url）{
loadMyEvent（clickListener（））；
}
私有void loadMyEvent（字符串javascript）{
loadUrl（“javascript:+javascript”）；
}
私有字符串clickListener（）{
返回（var i=0；i