Android End Micro-letter payment V3 version of the signature unified under the single detailed _android

Full is the pit, because the server lazy let customer service to write unified order, the server only gave the URL of the notification. Micro-letter Payment demo does not unify the order of the Code.

Read this article before reading: Https://pay.weixin.qq.com/wiki/doc/api/app/app.PHP?chapter=9_1

Step-by-Step to the first according to the unified parameters of the Introduction tool:

1. Get to current IP:

<span style= "FONT-SIZE:14PX;" >public String getlocalipaddress () {try {for (enumeration<networkinterface> en = networkinterface.g Etnetworkinterfaces (); En.hasmoreelements (); 
        ) {NetworkInterface intf = en.nextelement (); for (enumeration<inetaddress> enumipaddr = intf.getinetaddresses (); enumipaddr.hasmoreelements ();) 
          {InetAddress inetaddress = enumipaddr.nextelement (); 
          if (!inetaddress.isloopbackaddress ()) {return inetaddress.gethostaddress (). toString (); 
  The catch (SocketException ex) {} return null; Private String Getwifiip () {//Get WiFi service Wifimanager Wifimanager = (Wifimanager) getsystemservice (context. 
    Wifi_service); 
    Determine if WiFi opens if (!wifimanager.iswifienabled ()) {wifimanager.setwifienabled (true); 
    } wifiinfo Wifiinfo = Wifimanager.getconnectioninfo (); 
    int ipaddress = wifiinfo.getipaddress (); String IP = inttoip (ipaddress); 
  return IP; 
        Private String Inttoip (int i) {return (I & 0xFF) + "." + ((I >> 8) & 0xFF) + "." + ((i >>) & 0xFF) + "." 
  + (I >> & 0xFF);  } </span>

2. Random order number generation test you can generate random numbers on your own:

<span style= "FONT-SIZE:14PX;" >private String Genouttradno () { 
    Random Random = new Random (); 
    Return Md5.getmessagedigest (string.valueof (Random.nextint (10000)). GetBytes ()); 
  

3. Signature tool:

<span style= "FONT-SIZE:14PX;" >private String genappsign (list<namevaluepair> params) { 
    StringBuilder sb = new StringBuilder (); 
 
    for (int i = 0; i < params.size (); i++) { 
      sb.append (params.get (i) getName ()); 
      Sb.append (' = '); 
      Sb.append (Params.get (i). GetValue ()); 
      Sb.append (' & '); 
    } 
    Sb.append ("key="); 
    Sb.append (Constants.api_key); 
 
    This.sb.append ("Sign str\n" +sb.tostring () + "\ n"); 
    String appsign = Md5.getmessagedigest (Sb.tostring (). GetBytes ()); 
    LOG.E ("Orion", appsign); 
    return appsign; 
  

Pretty much.   Now we need to generate parameters    parameter requirements that are passed in XML format:

<span style= "FONT-SIZE:14PX;" 
    >private String Genproductargs () {stringbuffer xml = new StringBuffer (); 
    String IP = GETWIFIIP (); 
    if (IP = = "" && IP = = "") {IP = getlocalipaddress (); 
      try {String noncestr = Gennoncestr (); 
      Xml.append ("</xml>"); 
      list<namevaluepair> packageparams = new linkedlist<namevaluepair> (); 
      Packageparams.add (New Basicnamevaluepair ("AppID", constants.app_id)); 
      Packageparams.add (New Basicnamevaluepair ("Body", "APP pay Test")); 
      Packageparams.add (New Basicnamevaluepair ("mch_id", constants.mch_id)); 
      Packageparams.add (New Basicnamevaluepair ("Nonce_str", Noncestr)); 
      Packageparams.add (New Basicnamevaluepair ("Notify_url", Configutil.notify_url)); 
      Packageparams.add (New Basicnamevaluepair ("Out_trade_no", Genouttradno ()); 
      Packageparams.add (New Basicnamevaluepair ("Spbill_create_ip", IP)); Packageparams.add (New Basicnamevaluepair ("Total_fee"," 1 ")); 
      Packageparams.add (New Basicnamevaluepair ("Trade_type", "APP")); 
      String sign = genpackagesign (packageparams); 
      Packageparams.add (New Basicnamevaluepair ("sign", sign)); 
      String xmlstring =toxml (packageparams); 
 
    return xmlstring; 
      catch (Exception e) {log.e ("TAG", "fail, ex =" + E.getmessage ()); 
    return null; 
 }}</span>

Among them ToXml:

<span style= "FONT-SIZE:14PX;" >private String toXml (list<namevaluepair> params) { 
    StringBuilder sb = new StringBuilder (); 
    Sb.append ("<xml>"); 
    for (int i = 0; i < params.size (); i++) { 
      sb.append ("<" +params.get (i). GetName () + ">"); 
 
 
      Sb.append (Params.get (i). GetValue ()); 
      Sb.append ("</" +params.get (i) getName () + ">"); 
    Sb.append ("</xml>"); 
 
    LOG.E ("Orion", Sb.tostring ()); 
    return sb.tostring (); 
  

The parameters are passed, according to the document instructions, we need to use post to hang connection URL address: https://api.mch.weixin.qq.com/pay/unifiedorder:

<span style= "FONT-SIZE:14PX;" > Private Class Getprepayidtask extends Asynctask<void, Void, map<string,string>> {private Progres 
 
 
    Sdialog Dialog; @Override protected void OnPreExecute () {dialog = Progressdialog.show (Payactivity.this, getString (R.string.ap 
    P_tip), getString (R.string.getting_prepayid)); 
        } @Override protected void OnPostExecute (map<string,string> result) {if (dialog!= null) { 
      Dialog.dismiss (); 
 
      } sb.append ("prepay_id\n" +result.get ("prepay_id") + "\ n"); 
 
    Resultunifiedorder=result; 
    } @Override protected void oncancelled () {super.oncancelled (); } @Override protected map<string,string> doinbackground (Void ... params) {String URL = string.f 
      Ormat ("Https://api.mch.weixin.qq.com/pay/unifiedorder"); 
 
      String entity = Genproductargs (); 
 
      LOG.E ("Orion", entity); byte[] buf = util.httppost (URL, entity); 
      String content = new string (BUF); 
      LOG.E ("Orion", content); 
 
      Map<string,string> xml=decodexml (content); 
    return XML; 
 }}</span>

  where Decodexml is:

 <span style= "FONT-SIZE:14PX;" >public map<string,string> decodexml (String content) {try {map<string, string> xml = new Ha 
      Shmap<string, string> (); 
      Xmlpullparser parser = Xml.newpullparser (); 
      Parser.setinput (content) (new StringReader); 
      int event = Parser.geteventtype (); 
        while (event!= xmlpullparser.end_document) {String nodename=parser.getname (); 
          Switch (event) {case XmlPullParser.START_DOCUMENT:break; 
              Case XmlPullParser.START_TAG:if ("xml". Equals (nodename) ==false) {//Instantiate student Object 
            Xml.put (Nodename,parser.nexttext ()); 
          } break; 
        Case XmlPullParser.END_TAG:break; 
      event = Parser.next (); 
    } return XML; 
    catch (Exception e) {log.e ("Orion", E.tostring ()); 
 
  return null; 
 }</span>

  is completed, the second part is to the micro-credit payment transmission to adjust the micro-letter payment parameters (see the specific parameters of the document):

 <span style= "FONT-SIZE:14PX;" 
    >private void Genpayreq () {req.appid = constants.app_id; 
    Req.partnerid = constants.mch_id; 
    Req.prepayid = Resultunifiedorder.get ("prepay_id"); 
    Req.packagevalue = "prepay_id=" +resultunifiedorder.get ("prepay_id"); 
    Req.noncestr = Gennoncestr (); 
    Req.timestamp = string.valueof (Gentimestamp ()); 
    list<namevaluepair> signparams = new linkedlist<namevaluepair> (); 
    Signparams.add (New Basicnamevaluepair ("AppID", Req.appid)); 
    Signparams.add (New Basicnamevaluepair ("Noncestr", Req.noncestr)); 
    Signparams.add (New Basicnamevaluepair ("package", Req.packagevalue)); 
    Signparams.add (New Basicnamevaluepair ("Partnerid", Req.partnerid)); 
    Signparams.add (New Basicnamevaluepair ("Prepayid", Req.prepayid)); 
    Signparams.add (New Basicnamevaluepair ("timestamp", Req.timestamp)); 
    Req.sign = Genappsign (signparams); 
 
    Sb.append ("sign\n" +req.sign+ "n ')"; 
 LOG.E ("Orion", Signparams.tostring ());
  }</span> 
 

The third part, the micro-letter payment:

 <span style= "FONT-SIZE:14PX;" >private void Sendpayreq () { 
    msgapi.registerapp (constants.app_id); 
    Msgapi.sendreq (req); 
  } </span> 

which

 <span style= "FONT-SIZE:14PX;" >Constants.APP_ID</span> 

is AppID on the developer platform to get

<span style= "FONT-SIZE:14PX;" >    

Merchant ID

The callback notification address after payment.

Signed two times, then use the Api--key is the Merchant Platform API security inside customization.

Yes, and there's a time tool to get

<span style= "FONT-SIZE:14PX;" >private long Gentimestamp () {return 
    System.currenttimemillis ()/1000; 
  } </span> 

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.