Android webview get current url and check if it contains a string

Question

The previous post is from here android studio webview get data and onfinish . I actually cannot get what I want from those answers. Maybe I should ask it more clearly. I actually used webview to load a content page. Then inside the content page, there are some links which are also local html created by myself. So the flow is like

android activity -> webview -> content page -> game page.

I actually want to retrieve a local variable marks in the game page. So I created a exit button, which is used to close the page and back to the android activity as well as carry the marks back to the android activity.

So I searched some information myself, and found that window.close() doesn't work. So I change the current URL to indicate that the exit button is clicked. And then extract the marks from the URL and store it in the android activity. But it doesn't work with my codes below, I think it is probably because of the method is used, when I am in the content page. I hope someone could help to do this, as I really cannot find the problem. I have edited the codes as below:

My activity in android:

private WebView webview;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    //setContentView(R.layout.activity_main);

    webview = new WebView(this);
    webview.getSettings().setJavaScriptEnabled(true);

    try {            
        webview.loadUrl("file:///android_asset/index.html");
        webview.setWebViewClient(new WebViewClient()

        @Override 
        public boolean shouldOverrideUrlLoading(WebView view, String url)
        {
           if (url.contains("?marks=")){
             finish();}  // close activity
           else{
             view.loadUrl(url);}

           return true; 
        });
    }
    catch(Exception ex)
    {
        ex.printStackTrace();
    }
    setContentView(webview);
}

My exit button is a div:

<div class="exit" onclick="finish()">Exit</div>

I am going to use the finish() function to return the variable and close the webpage back to the activity in android.

function finish() {
  document.location.href= window.location.href +"?marks=" + marks;
}

score 0 · Accepted Answer · answered Feb 22 '17 at 17:37

Okay I think question is solved, as webview.loadUrl should be placed at the end. webview.setWebViewClient(new WebViewClient()

    webview.setWebViewClient(new WebViewClient()

    @Override 
    public boolean shouldOverrideUrlLoading(WebView view, String url)
    {
       if (url.contains("?marks=")){
         finish();}  // close activity
       else{
         view.loadUrl(url);}

       return true; 
    });

    webview.loadUrl("file:///android_asset/index.html");

Android webview get current url and check if it contains a string

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