A simple example _javascript technique that JS calls Java methods and passes arguments to each other

JS invokes Java methods through PhoneGap and passes the reference to each other.

One, Java code

Writes a class that inherits from plugin and overrides the Execute method.

Import Org.json.JSONArray;
Import android.app.Activity;
Import Android.app.AlertDialog;
Import android.content.ActivityNotFoundException;
Import Android.content.DialogInterface;
Import android.content.Intent;
Import Android.net.Uri;
Import Android.os.Bundle;
Import com.phonegap.api.PhonegapActivity;
Import Com.phonegap.api.Plugin;

Import Com.phonegap.api.PluginResult;

  public class Plugintest extends Plugin {public static String ACTION = "Hello";
   Public plugintest () {}/** * Executes the request and returns Pluginresult.
   * @param action the action to execute.
   * @param args Jsonarray of arguments for the plugin.
   * @param callbackid The callback ID used when calling back into JavaScript.
   * @return a Pluginresult object with a status and message. */@Override Public Pluginresult Execute (string action, Jsonarray args, string callbackid) {try {Jsonobjec T jsonobj = new Jsonobject ()//JSON data that can be returned to JS if (Action.equaLS ("Hello")) {string str1= args.getstring (0);//Get first argument String str2= args.getstring (1);//Get second argument Jsonobj.put ("str1", str1+ "1");　 Put the parameters in the Jsonobject object Jsonobj.put ("str2", str2+ "2");
      Put the parameter in the Jsonobject object} pluginresult r = new Pluginresult (pluginresult.status.ok,jsonobj);
    return R;
    catch (Exception e) {e.printstacktrace (); }
  }
}

Register plugins in JavaScript files

Create a new. js file and place the file in the same directory as the PhoneGap file. (Create a new simpleplugin.js file)

var simpleplugin = function () {};

STR1 and str2 are parameters that are uploaded to Java
SimplePlugin.prototype.hello = function (Successcallback, Failurecallback, str1, str2) {
  //Exec's parameters are: Success Callback, Failure Callback, registered Plugin name: The name that corresponds to the XML file configuration,
  // Hello ' is the parameter string action//name (from HTML legend) in the Execute method of the incoming Java file return
  phonegap.exec (Successcallback, Failurecallback, ' plugintest ', ' hello ', [str1,str2]);

This is PhoneGap Plugin's registration, Plugin's name and Native Class name are not wrong, that's the phonegap.addconstructor we just entered
(function () {
  //Register the JavaScript plugin with PhoneGap
  Phonegap.addplugin (' Simpleplugin ', New Simpleplugin ());  Simpleplugin is the plug-in name, and the new Simpleplugin () instantiates the class name of this JavaScript 

);

Iv. calling methods in HTML files

Introduction of PhoneGap and plug-in JS files in HTML file, calling method

<! DOCTYPE html>
 
 

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