CODEWITHSUNDEEP
javaandroidwebviewandroid-webview
Pedro Lobito
Pedro Lobito

Reputation: 98881

Android webView shouldInterceptRequest - Stop Loading Resource

I'm trying to intercept and stop loading all mp4 videos on a webView, for that I'm using shouldInterceptRequest. I'm able to intercept the videos and, for ex:, show a dialog but, but I'm not able to stop loading them, any idea why?

webView.setWebViewClient(new WebViewClient() {
    @SuppressWarnings("deprecation")
    @Override
    public WebResourceResponse shouldInterceptRequest(final WebView view, String url) {
        try { 
            if (url.contains(".mp4?")) {
                return getResponseData();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return super.shouldInterceptRequest(view, url);
    }

    private WebResourceResponse getResponseData() {
        try {
            String str = "Access Denied";
            InputStream data = new ByteArrayInputStream(str.getBytes("UTF-8"));
            return new WebResourceResponse("text/css", "UTF-8", data);
        } catch (IOException e) {
            return null;
        }
    }

Upvotes: 4

Views: 10121

Answers (4)

Youssef Af
Youssef Af

Reputation: 1

Try this

public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
                if (yourCondition) {
                    webView.post(new Runnable() {
                        @Override
                        public void run() {
                            webView.stopLoading();
                        }
                    });
                }

                return null;
            }

Upvotes: 0

Ashwin
Ashwin

Reputation: 7647

If your HTML page does not show mp4 contents or handles invalid content, then you can simply pass some dummy InputStream to WebResourceResponse as shown below.

my_webview.webViewClient = object : WebViewClient() {
    override fun shouldInterceptRequest(view: WebView?, request: WebResourceRequest?): WebResourceResponse? {
        if (request?.url?.contains(".mp4") == true) {
            val inputStream = "".byteInputStream(Charset.defaultCharset())
            return WebResourceResponse("image/png", "UTF-8", inputStream)
        } else {
            return super.shouldInterceptRequest(view, request)
        }
    }
}

Upvotes: 3

shyam
shyam

Reputation: 606

This may help you:

@Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
    if (yourCondition) {
        Handler handler = new Handler(getMainLooper());
        handler.post(new Runnable() {
            @Override
            public void run() {
                YourwebView.stopLoading();
                YourwebView.doAnythingYouWant();
            }
        });
    }
    return super.shouldInterceptRequest(view, request);
}

I created the thread because A WebView method ( that is stopLoading() ) can't be called on a currently running thread and that thread is 'Chrome_FileThread'.

Also, get getMainLooper() because In above situation we can't create handler inside thread that has not called Looper.prepare().

Hope this helps.

Upvotes: 4

Mark Gilchrist
Mark Gilchrist

Reputation: 2032

The method you want is this one I think

webView.setWebViewClient(new WebViewClient(){
  @Override
   public boolean shouldOverrideUrlLoading(WebView view, String url) {
               // code goes here
    }
});

Upvotes: 0

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