How to integrate PayU money Gateway in Android? -

i developing ecommerce app in want integrate payumoney payment gateway. can me procedure, link or tutorial, how so? thanks.

i have done :) :) have edit successurl , failureurl:

its working me perfectly.

public class payumoneyactivity extends appcompatactivity {      /**      * adding webview setcontentview      */     webview webview;      /**      * context activity      */     context activity;     /**      * order id      * request updating payment status if payment done      */     int mid; //getting previous activity     /**      * required fields      */     // test variables     /*     private string mmerchantkey = "fcyqqz";     private string msalt = "sfbpga8e";     private string mbaseurl = "https://test.payu.in";     */      // final variables     private string mmerchantkey = "your merchant key";     private string msalt = "salt";     private string mbaseurl = "https://secure.payu.in";       private string maction = ""; // final url     private string mtxnid; // create below randomly     private string mhash; // create below randomly     private string mproductinfo = "food items"; //passing string     private string mfirstname; // previous activity     private string memailid; // previous activity     private double mamount; // previous activity     private string mphone; // previous activity     private string mserviceprovider = "payu_paisa";     private string msuccessurl = "your success url";     private string mfailedurl = "your failure url";       boolean isfromorder;     /**      * handler      */     handler mhandler = new handler();      /**      * @param savedinstancestate      */     @suppresslint({"addjavascriptinterface", "setjavascriptenabled"})     @override     protected void oncreate(bundle savedinstancestate) {         getwindow().requestfeature(window.feature_progress);         super.oncreate(savedinstancestate);          /**         * setting webview screen         */         setcontentview(r.layout.activity_webview_for_payumoney);          /**          * creating webview          */         webview = (webview) findviewbyid(r.id.payumoney_webview);          /**          * context variable          */         activity = getapplicationcontext();          /**          * actionbar settings          */         toolbar toolbar = (toolbar) findviewbyid(r.id.toolbar);         setsupportactionbar(toolbar);          actionbar ab = getsupportactionbar();         ab.setdisplayhomeasupenabled(true);         // enabling action bar app icon , behaving toggle button         ab.sethomebuttonenabled(true);         ab.settitle(getstring(r.string.title_activity_online_payment));          /**          * getting intent variables...          */         bundle bundle = getintent().getextras();         if (bundle != null) {              mfirstname = bundle.getstring("name");             memailid = bundle.getstring("email");             mamount = bundle.getdouble("amount");             mphone = bundle.getstring("phone");             mid = bundle.getint("id");             isfromorder = bundle.getboolean("isfromorder");              log.i(tag, "" + mfirstname + " : " + memailid + " : " + mamount + " : " + mphone);              /**              * creating transaction id              */             random rand = new random();             string randomstring = integer.tostring(rand.nextint()) + (system.currenttimemillis() / 1000l);             mtxnid = hashcal("sha-256", randomstring).substring(0, 20);              mamount = new bigdecimal(mamount).setscale(0, roundingmode.up).intvalue();              /**              * creating hash key              */             mhash = hashcal("sha-512", mmerchantkey + "|" +                     mtxnid + "|" +                     mamount + "|" +                     mproductinfo + "|" +                     mfirstname + "|" +                     memailid + "|||||||||||" +                     msalt);              /**              * final action url...              */             maction = mbaseurl.concat("/_payment");              /**              * webview client              */             webview.setwebviewclient(new webviewclient() {                  @override                 public void onreceivederror(webview view, webresourcerequest request, webresourceerror error) {                     super.onreceivederror(view, request, error);                     toast.maketext(activity, "oh no! " + error, toast.length_short).show();                 }                  @override                 public void onreceivedsslerror(webview view,                                                sslerrorhandler handler, sslerror error) {                     toast.maketext(activity, "ssl error! " + error, toast.length_short).show();                     handler.proceed();                 }                  @override                 public boolean shouldoverrideurlloading(webview view, string url) {                     return super.shouldoverrideurlloading(view, url);                 }                  @override                 public void onpagefinished(webview view, string url) {                      if (url.equals(msuccessurl)) {                         intent intent = new intent(payumoneyactivity.this, paymentstatusactivity.class);                         intent.putextra("status", true);                         intent.putextra("transaction_id", mtxnid);                         intent.putextra("id", mid);                         intent.putextra("isfromorder", isfromorder);                         intent.addflags(intent.flag_activity_clear_top);                         startactivity(intent);                     } else if (url.equals(mfailedurl)) {                         intent intent = new intent(payumoneyactivity.this, paymentstatusactivity.class);                         intent.putextra("status", false);                         intent.putextra("transaction_id", mtxnid);                         intent.putextra("id", mid);                         intent.putextra("isfromorder", isfromorder);                         intent.addflags(intent.flag_activity_clear_top);                         startactivity(intent);                     }                     super.onpagefinished(view, url);                 }             });              webview.setvisibility(view.visible);             webview.getsettings().setbuiltinzoomcontrols(true);             webview.getsettings().setcachemode(2);             webview.getsettings().setdomstorageenabled(true);             webview.clearhistory();             webview.clearcache(true);             webview.getsettings().setjavascriptenabled(true);             webview.getsettings().setsupportzoom(true);             webview.getsettings().setusewideviewport(false);             webview.getsettings().setloadwithoverviewmode(false);             webview.addjavascriptinterface(new payujavascriptinterface(payumoneyactivity.this), "payumoney");              /**              * mapping compulsory key value pairs              */             map<string, string> mapparams = new hashmap<>();              mapparams.put("key", mmerchantkey);             mapparams.put("txnid", mtxnid);             mapparams.put("amount", string.valueof(mamount));             mapparams.put("productinfo", mproductinfo);             mapparams.put("firstname", mfirstname);             mapparams.put("email", memailid);             mapparams.put("phone", mphone);             mapparams.put("surl", msuccessurl);             mapparams.put("furl", mfailedurl);             mapparams.put("hash", mhash);             mapparams.put("service_provider", mserviceprovider);              webviewclientpost(webview, maction, mapparams.entryset());         } else {             toast.maketext(activity, "something went wrong, try again.", toast.length_long).show();         }     }      /**      * posting data on payumoney site form      *      * @param webview      * @param url      * @param postdata      */     public void webviewclientpost(webview webview, string url,                                   collection<map.entry<string, string>> postdata) {         stringbuilder sb = new stringbuilder();          sb.append("<html><head></head>");         sb.append("<body onload='form1.submit()'>");         sb.append(string.format("<form id='form1' action='%s' method='%s'>", url, "post"));          (map.entry<string, string> item : postdata) {             sb.append(string.format("<input name='%s' type='hidden' value='%s' />", item.getkey(), item.getvalue()));         }         sb.append("</form></body></html>");          log.d("tag", "webviewclientpost called: " + sb.tostring());         webview.loaddata(sb.tostring(), "text/html", "utf-8");     }      /**      * hash key calculation      *      * @param type      * @param str      * @return      */     public string hashcal(string type, string str) {         byte[] hashsequence = str.getbytes();         stringbuffer hexstring = new stringbuffer();         try {             messagedigest algorithm = messagedigest.getinstance(type);             algorithm.reset();             algorithm.update(hashsequence);             byte messagedigest[] = algorithm.digest();              (int = 0; < messagedigest.length; i++) {                 string hex = integer.tohexstring(0xff & messagedigest[i]);                 if (hex.length() == 1)                     hexstring.append("0");                 hexstring.append(hex);             }         } catch (nosuchalgorithmexception nsae) {         }         return hexstring.tostring();     }      @override     public boolean onoptionsitemselected(menuitem item) {         if(item.getitemid() == android.r.id.home) {             onpressingback();         }         return super.onoptionsitemselected(item);     }      @override     public void onbackpressed() {         onpressingback();     }      /**      * on pressing      * giving alert...      */     private void onpressingback() {          final intent intent;          if(isfromorder)             intent = new intent(payumoneyactivity.this, productincartlist.class);         else             intent = new intent(payumoneyactivity.this, mainactivity.class);          intent.setflags(intent.flag_activity_clear_top);          alertdialog.builder alertdialog = new alertdialog.builder(payumoneyactivity.this);          // setting dialog title         alertdialog.settitle("warning");          // setting dialog message         alertdialog.setmessage("do cancel transaction?");          // on pressing settings button         alertdialog.setpositivebutton("yes", new dialoginterface.onclicklistener() {             public void onclick(dialoginterface dialog, int which) {                 finish();                 startactivity(intent);             }         });          // on pressing cancel button         alertdialog.setnegativebutton("no", new dialoginterface.onclicklistener() {             public void onclick(dialoginterface dialog, int which) {                 dialog.dismiss();             }         });          // showing alert message         alertdialog.show();     }      public class payujavascriptinterface {         context mcontext;          /**          * instantiate interface , set context          */         payujavascriptinterface(context c) {             mcontext = c;         }          public void success(long id, final string paymentid) {             mhandler.post(new runnable() {                  public void run() {                     mhandler = null;                     toast.maketext(payumoneyactivity.this, "payment successfully.", toast.length_short).show();                 }             });         }     } }