WebViewAdblock

Android webview Adblocker is a simple library to block ads in webview. this code is basicaly stop the ads and remove the html from it and render it again.

How do I use it?

Step 1

#1 Add it in your MainActivity.java

    AdBlocker.init(this);

    webview=(WebView)findViewById(R.id.webView);
    webview.setWebViewClient(new MyBrowser());

    WebSettings webSettings = webview.getSettings();
    webSettings.setJavaScriptEnabled(true);

    webview.loadUrl("https://www.meersworld.net/");

Step 2

Add these codes in MainActivity.java

private class MyBrowser extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }

    private Map<String, Boolean> loadedUrls = new HashMap<>();
    @Nullable
    @Override
    public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
        boolean ad;
        if (!loadedUrls.containsKey(url)) {
            ad = AdBlocker.isAd(url);
            loadedUrls.put(url, ad);
        } else {
            ad = loadedUrls.get(url);
        }
        return ad ? AdBlocker.createEmptyResource() :
                super.shouldInterceptRequest(view, url);
    }
}

Step 3

Make a AdBlocker.java class and paste the below codes

public class AdBlocker {

private static final String AD_HOSTS_FILE = "host.txt";
private static final Set<String> AD_HOSTS = new HashSet<>();

public static void init(final Context context) {
    new AsyncTask<Void, Void, Void>() {
        @Override
        protected Void doInBackground(Void... params) {
            try {
                loadFromAssets(context);
            } catch (IOException e) {
                // noop
            }
            return null;
        }
    }.execute();
}

@WorkerThread
private static void loadFromAssets(Context context) throws IOException {
    InputStream stream = context.getAssets().open(AD_HOSTS_FILE);
    InputStreamReader inputStreamReader = new InputStreamReader(stream);
    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
    String line;
    while ((line = bufferedReader.readLine()) != null) AD_HOSTS.add(line);
    bufferedReader.close();
    inputStreamReader.close();
    stream.close();
}

public static boolean isAd(String url) {
    try {
        return isAdHost(getHost(url))||AD_HOSTS.contains(Uri.parse(url).getLastPathSegment());
    } catch (MalformedURLException e) {
        Log.d("Ind", e.toString());
        return false;
    }

}

private static boolean isAdHost(String host) {
    if (TextUtils.isEmpty(host)) {
        return false;
    }
    int index = host.indexOf(".");
    return index >= 0 && (AD_HOSTS.contains(host) ||
            index + 1 < host.length() && isAdHost(host.substring(index + 1)));
}

public static String getHost(String url) throws MalformedURLException {
    return new URL(url).getHost();
}

public static WebResourceResponse createEmptyResource() {
    return new WebResourceResponse("text/plain", "utf-8", new ByteArrayInputStream("".getBytes()));
}
}

Step 4

Create a assests directory in main and add host.txt file into that assests directory.

https://github.com/CodeBit25/WebViewAdblocker/blob/master/app/src/main/assets/host.txt

Now you can run your app to see if the ads are blocked. You can always use other webview features and add fetures to the webview.