Javascript calls from Android using PhoneGap -


i have , application built phonegap, , i'm trying communicate javascript native code.

in droidgap extending class:

@override public void oncreate(bundle savedinstancestate) {     logger.log("oncreate");     super.oncreate(savedinstancestate);     super.init();     super.appview.getsettings().setjavascriptenabled(true);     super.appview.getsettings().setsupportzoom(true);     super.appview.getsettings().setbuiltinzoomcontrols(true);     super.appview.getsettings().setdisplayzoomcontrols(false);     jsinterface = new communicationinterface(this, appview);     super.appview.addjavascriptinterface(jsinterface, "communicationinterface");  }

the javascriptinterface:

public class communicationinterface {     private webview mappview;     private droidgap mgap;      public communicationinterface(droidgap gap, webview view)  {         mappview = view;         mgap = gap;     }      public string getteststring() {         return "teststring";     }      public void parse(object o) {         logger.log(o);     } }

the javacript located in external file (i create html file has line in header: <script type="text/javascript" src="scripts.js"></script>)

scripts.js: 

function sendtointerface() {     alert("alert");     var map = new object();     (...)     window.communicationinterface.parse(map); //communication js -> android seems work. }

i read in other posts it's possible communicate between phonegap , android, thusfar i've not had success. did manage create alert, loadurl("javascript:alert('alert');"), i've read shouldn't because that's sendjavascript() (and causes leaks, reloads page, etc). i've tried shoot couple of strings through sendjavascript() method, no avail:

  • sendjavascript("javascript:alert('alert');")
  • sendjavascript("javascript:sendtointerface();")
  • sendjavascript("sendtointerface();")
  • sendjavascript("window.sendtointerface();")

how communicate native -> phonegap (or what's wrong have)? thusfar other posts , questions haven't helped me particular problem.

read:

edit

i wrote working project:

java part

import org.apache.cordova.droidgap; import org.json.jsonexception; import org.json.jsonobject;  import android.os.bundle; import android.util.log;  public class app extends droidgap {   @override   public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     super.loadurl("file:///sdcard/ds/index.html");     system.out.println("loading sdcard");     thread t = new thread() {       public void run() {         try {           (int = 0; < 3; i++) {             sleep(2000);             sendvalue("value " + i, "another vlaue " + i);           }         } catch (exception e) {           e.printstacktrace();         }       };     };     t.start();   }    public void sendvalue(string value1, string value2) {      system.out.println("sendvalue in app");     jsonobject data = new jsonobject();     try {       data.put("value1", value1);       data.put("value2", value2);     } catch (jsonexception e) {       log.e("commtest", e.getmessage());     }     string js = string.format("window.plugins.appcomm.updatevalues('%s');",         data.tostring());     this.sendjavascript(js);   } }  import org.apache.cordova.api.plugin; import org.apache.cordova.api.pluginresult; import org.json.jsonarray; import org.json.jsonexception; import org.json.jsonobject;  import android.util.log;  public class appcomm extends plugin{    private static appcomm instance;    public appcomm () {     instance = this;   }    public static appcomm getinstance() {     return instance;   }    @override   public pluginresult execute(string action, jsonarray args, string callbackid) {     system.out.println("in execute appcomm");       return null;   }    public void sendvalue(string value1, string value2) {     system.out.println("sendvalue in appcomm");     jsonobject data = new jsonobject();     try {       data.put("value1", value1);       data.put("value2", value2);     } catch (jsonexception e) {       log.e("commtest", e.getmessage());     }     string js = string.format(         "window.plugins.commtest.updatevalues('%s');",         data.tostring());     this.sendjavascript(js);   } }

res/xml/plugins.xml

<plugins>     <plugin name="app" value="org.apache.cordova.app"/>     <plugin name="geolocation" value="org.apache.cordova.geobroker"/>     <plugin name="device" value="org.apache.cordova.device"/>     <plugin name="accelerometer" value="org.apache.cordova.accellistener"/>     <plugin name="compass" value="org.apache.cordova.compasslistener"/>     <plugin name="media" value="org.apache.cordova.audiohandler"/>     <plugin name="camera" value="org.apache.cordova.cameralauncher"/>     <plugin name="contacts" value="org.apache.cordova.contactmanager"/>     <plugin name="file" value="org.apache.cordova.fileutils"/>     <plugin name="networkstatus" value="org.apache.cordova.networkmanager"/>     <plugin name="notification" value="org.apache.cordova.notification"/>     <plugin name="storage" value="org.apache.cordova.storage"/>     <plugin name="temperature" value="org.apache.cordova.templistener"/>     <plugin name="filetransfer" value="org.apache.cordova.filetransfer"/>     <plugin name="capture" value="org.apache.cordova.capture"/>     <plugin name="battery" value="org.apache.cordova.batterylistener"/>     <plugin name="splashscreen" value="org.apache.cordova.splashscreen"/>      <plugin name="appcomm" value="com.example.plugin.appcomm"/> </plugins>

cordova.xml

<?xml version="1.0" encoding="utf-8"?> <cordova>     <access origin=".*"/> <!-- allow local pages -->     <log level="debug"/>     <preference name="classicrender" value="true" /> </cordova>

index.html header

<head>     <meta charset="utf-8" />     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1.0" />     <title>     </title>     <link rel="stylesheet" href="http://code.jquery.com/mobile/1.1.0/jquery.mobile-1.1.0.css" />     <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js">     </script>     <script src="http://code.jquery.com/mobile/1.1.0/jquery.mobile-1.1.0.min.js">     </script>     <script type="text/javascript" charset="utf-8" src="cordova.js"></script>        <script type="text/javascript" charset="utf-8">     var appcomm=function(){};      appcomm.prototype.updatevalues=function(a){     var map = new object();     map["x1"] = "hallo";     map["x2"] = "hi";     cordova.exec(null, null, null);     };      cordova.addconstructor(function(){cordova.addplugin("appcomm",new appcomm)});     </script> </head>

one of problems javascript in separate file (i think 1 of problems). if isn't ask, how can call java back, , values? how implement execute method , how call (i'm bad @ jquery)?

firstly, using plugin subclass. plugin has been deprecated , has been replaced cordovaplugin. if you're using old version of phonegap, recommend upgrade.

secondly, exec call wrong. docs plugin development state have pass 5 parameters, while you're passing 3 nulls. how expect handled?

cordova.exec(function(winparam) {}, function(error) {}, "service",              "action", ["firstargument", "secondargument", 42,              false]);

here, service, action , array of parameters determine happen in java code. first 2 determine happen in javascript under conditions. so, while can use null first two, have specify last three.

i have working example plugin works phonegap 2.3.0. see code below:

public class examplejscommunicator extends cordovaplugin {      public boolean execute (final string action, final jsonarray args, callbackcontext callbackcontext) throws jsonexception {         pluginresult.status status = pluginresult.status.ok;         string result = "";          cordova.getactivity ().runonuithread (new runnable () {             @override             public void run() {                 try {                     string displaytext = "";                     if (action.equals ("buttonclicked")) {                         displaytext = args.getstring(0) + " clicked";                     }                      else if (action.equals ("animationrunning")) {                         displaytext = args.getboolean(0) ? "animation started running" : "animation stopped running";                     }                      textview label = (textview) cordova.getactivity().findviewbyid (r.id.textview);                     label.settext (displaytext + " , activity knows it!");                 } catch (jsonexception e) {                     e.printstacktrace();                 }             }         });          return true;     } }

with code above, have java-side plugin capable of handling 2 custom "actions" - buttonclicked , animationrunning. these actions serve purposes, name them otherwise.

now, still need register plugin, cordova know it. done in xml/config.xml file. under plugins, have add following:

<plugin name="examplejscommunicator" value="com.example.phonegap.examplejscommunicator"/>

then can pass data (or "actions") javascript follows. note parameters (which.id , animationrunning passed in array):

cordova.exec (null, null, "examplejscommunicator", "buttonclicked", [which.id]);  // first action cordova.exec (null, null, "examplejscommunicator", "animationrunning", [animationrunning]);  // second action

these 2 exec calls trigger execute method in examplejscommunicator class , handled in respective if blocks. doesn't matter call exec, long declare javascript code after include cordova.js file. javascript contained within separate main.js file , works fine:

<script type="text/javascript" charset="utf-8" src="cordova.js"></script> <script type="text/javascript" charset="utf-8" src="main.js"></script>

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