Notification wordpress => Android Studio ( ça marche, Mais !! )

Bonjour
j arriver a configurer mon projet webview avec onesignale et mes notification wordpress s'ouvrent avec Succès sur mon appli , mais le problème quand je publie une article sur mon site, la notification reçu s'ouvre sur la page accueil de mon application, pas sur l'article elle meme.

voila mon code MainActivity

public class MainActivity extends AppCompatActivity {
    WebView webView;
    ProgressBar progressBar;

    RelativeLayout relativeLayout;
    Button btnNoInternetConnection;

    @SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // remove title
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.activity_main);

        OneSignal.startInit(this)
                .inFocusDisplaying(OneSignal.OSInFocusDisplayOption.Notification)
                .unsubscribeWhenNotificationsAreDisabled(true)
                .setNotificationReceivedHandler(new ExampleNotificationReceivedHandler())
                .init();



        webView = (WebView) findViewById(R.id.webView);
        progressBar = (ProgressBar) findViewById(R.id.progressBar );
        // loadUrl

        webView.setWebChromeClient( new MyChrome() );

        progressBar.setVisibility(View.VISIBLE);

         //apel telephone hort app
        webView.setWebViewClient(new WebViewClient() {
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                if (url.startsWith("tel:")) {
                    Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
                    startActivity(intent);
                    return true;
                }
                return false;
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                progressBar.setVisibility(View.GONE);
            }
        });



        //no conection

        btnNoInternetConnection = (Button) findViewById(R.id.btnNoConnection);
        relativeLayout = (RelativeLayout) findViewById(R.id.relativeLayout);

        checkConnection();

//  websettings
        WebSettings webSettings = webView.getSettings();

        webSettings.setJavaScriptEnabled(true);
        //
        webSettings.setDomStorageEnabled(true);
        //
        webSettings.setUseWideViewPort(true);

        webSettings.setAllowContentAccess(true);
        webSettings.setAllowFileAccess(true);
        webSettings.setAppCacheEnabled(true);


// pivote ecran phone et video
        if (savedInstanceState!=null){
            webView.post( new Runnable() {
                @Override
                public void run() {
                    checkConnection();

                }
            });
        }


//button no internet
        btnNoInternetConnection.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                checkConnection();

            }
        });

    }




    // plein écran video
    private class MyChrome extends WebChromeClient {

        private View mCustomView;
        private CustomViewCallback mCustomViewCallback;
        protected FrameLayout mFullscreenContainer;
        private int mOriginalOrientation;
        private int mOriginalSystemUiVisibility;

        MyChrome() {}

        public Bitmap getDefaultVideoPoster()
        {
            if (mCustomView == null) {
                return null;
            }
            return BitmapFactory.decodeResource(getApplicationContext().getResources(), 2130837573);
        }

        public void onHideCustomView()
        {
            ((FrameLayout)getWindow().getDecorView()).removeView(this.mCustomView);
            this.mCustomView = null;
            getWindow().getDecorView().setSystemUiVisibility(this.mOriginalSystemUiVisibility);
            setRequestedOrientation(this.mOriginalOrientation);
            this.mCustomViewCallback.onCustomViewHidden();
            this.mCustomViewCallback = null;
        }

        public void onShowCustomView(View paramView, WebChromeClient.CustomViewCallback paramCustomViewCallback)
        {
            if (this.mCustomView != null)
            {
                onHideCustomView();
                return;
            }
            this.mCustomView = paramView;
            this.mOriginalSystemUiVisibility = getWindow().getDecorView().getSystemUiVisibility();
            this.mOriginalOrientation = getRequestedOrientation();
            this.mCustomViewCallback = paramCustomViewCallback;
            ((FrameLayout)getWindow().getDecorView()).addView(this.mCustomView, new FrameLayout.LayoutParams(-1, -1));
            getWindow().getDecorView().setSystemUiVisibility(3846);
        }
    }



    class ExampleNotificationOpenedHandler implements OneSignal.NotificationOpenedHandler {
        // This fires when a notification is opened by tapping on it.
        @Override
        public void notificationOpened(OSNotificationOpenResult result) {
            OSNotificationAction.ActionType actionType = result.action.type;
            JSONObject data = result.notification.payload.additionalData;
            String customKey;

            Log.i("OSNotificationPayload", "result.notification.payload.toJSONObject().toString(): " + result.notification.payload.toJSONObject().toString());


            if (data != null) {
                customKey = data.optString("customkey", null);
                if (customKey != null)
                    Log.i("OneSignalExample", "customkey set with value: " + customKey);
            }

            if (actionType == OSNotificationAction.ActionType.ActionTaken)
                Log.i("OneSignalExample", "Button pressed with id: " + result.action.actionID);

            // The following can be used to open an Activity of your choice.
            // Replace - getApplicationContext() - with any Android Context.
            // Intent intent = new Intent(getApplicationContext(), YourActivity.class);
            // intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK);
            // startActivity(intent);

            // Add the following to your AndroidManifest.xml to prevent the launching of your main Activity
            //   if you are calling startActivity above.
        }
    }






    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()){
        webView.goBack();
        return true;
        }
        return super.onKeyDown(keyCode, event);
    }


// pivote ecran phone et video

    @Override
    public void onConfigurationChanged(Configuration newConfig){
        super.onConfigurationChanged( newConfig );
    }

    @Override
    protected void onSaveInstanceState(Bundle outState ){
        super.onSaveInstanceState( outState );
        webView.saveState( outState );
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState){
        super.onRestoreInstanceState( savedInstanceState );
        webView.restoreState( savedInstanceState );
    }




// no conection message
    public void checkConnection(){


        ConnectivityManager connectivityManager = (ConnectivityManager)
                this.getSystemService(Context.CONNECTIVITY_SERVICE);
        assert connectivityManager != null;
        NetworkInfo wifi = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        NetworkInfo mobileNetwork = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);


        assert wifi != null;
        if (wifi.isConnected()){
            webView.loadUrl("https://www.groupe-alakssa.ma/");
            webView.setVisibility(View.VISIBLE);
            relativeLayout.setVisibility(View.GONE);



        }
        else {
            assert mobileNetwork != null;
            if (mobileNetwork.isConnected()){
                webView.loadUrl("https://www.groupe-alakssa.ma/");
                webView.setVisibility(View.VISIBLE);
                relativeLayout.setVisibility(View.GONE);

            }
            else {


                webView.setVisibility(View.GONE);
                relativeLayout.setVisibility(View.VISIBLE);



            }
        }



    }
}

le "onesignal-mobile-support.php" dans mon " wp-content/mu-plugins"

<?php
    add_filter('onesignal_send_notification', 'onesignal_send_notification_filter', 10, 4);
    function onesignal_send_notification_filter($fields, $new_status, $old_status, $post) {
        /* Goal: We don't want to modify the original $fields array, because we want the original web push notification to go out unmodified. However, we want to send an additional notification to Android and iOS devices with an additionalData property.


*     */        $fields_dup = $fields;        $fields_dup['isAndroid'] = true;        $fields_dup['isIos'] = true;        $fields_dup['isAnyWeb'] = true;        $fields_dup['isWP'] = false;        $fields_dup['isAdm'] = false;        $fields_dup['isChrome'] = false;        // $fields_dup['android_channel_id'] = "<CHANNEL ID UUID HERE>";        $fields_dup['data'] = array("myappurl" => $fields['url']);        /* Important to set web_url to support opening through both mobile and browser*/        $fields_dup['web_url'] = $fields_dup['url'];        /* Important to unset the URL to prevent opening the browser when the notification is clicked for mobile app users */        unset($fields_dup['url']);        $onesignal_post_url = "https://onesignal.com/api/v1/notifications";        /* Hopefully OneSignal::get_onesignal_settings(); can be called outside of the plugin */        $onesignal_wp_settings = OneSignal::get_onesignal_settings();        $onesignal_auth_key = $onesignal_wp_settings['app_rest_api_key'];        $request = array("headers" => array("content-type" => "application/json;charset=utf-8", "Authorization" => "Basic " . $onesignal_auth_key), "body" => json_encode($fields_dup), "timeout" => 60);        $response = wp_remote_post($onesignal_post_url, $request);        if (is_wp_error($response) || !is_array($response) || !isset($response['body'])) {            $status = $response->get_error_code();            $error_message = $response->get_error_message();            error_log("There was a " . $status . " error returned from OneSignal when sending to mobile users: " . $error_message);            return;                                                    }        return $fields;                    }