Example using JNI.jsm to create a card for Ankidroid in Firefox for Android

boostrap.js

"use strict";
//JNI.jsm introduced requires Firefox for Android 34
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;

Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");

XPCOMUtils.defineLazyGetter(this, "JNI", function() {
  
  let scope = {};
  Cu.import("resource://gre/modules/JNI.jsm", scope);
  return scope.JNI;

});



function launch() {
  let jenv;

  try {
    jenv = JNI.GetForThread();

    let GeckoAppShell = JNI.LoadClass(jenv, "org.mozilla.gecko.GeckoAppShell", {
      static_methods: [{
        name: "getContext",
        sig: "()Landroid/content/Context;"
      }]
    });

    let Intent = JNI.LoadClass(jenv, "android.content.Intent", {
      constructors: [{
        name: "<init>",
        sig: "(Ljava/lang/String;)V"
      }],
      methods: [{
        name: "putExtra",
        sig: "(Ljava/lang/String;Ljava/lang/String;)Landroid/content/Intent;"
      }]
    });

    let Context = JNI.LoadClass(jenv, "android.content.Context", {
      methods: [{
        name: "startActivity",
        sig: "(Landroid/content/Intent;)V"
      }]
    });

    let context = GeckoAppShell.getContext();
    let intent = Intent["new"]("org.openintents.action.CREATE_FLASHCARD");
    intent.putExtra("SOURCE_TEXT", "Some Text");
    intent.putExtra("TARGET_TEXT", "Other Text");
    context.startActivity(intent);
  } finally {
    if (jenv) {
      JNI.UnloadClasses(jenv);
    }
  }
}


var menuID = null;

function loadIntoWindow(window) {
  menuID = window.NativeWindow.menu.add("Launch Intent", null, launch);
}

function unloadFromWindow(window) {
  window.NativeWindow.menu.remove(menuID);
}

/**
 * bootstrap.js API
 */
var windowListener = {
  onOpenWindow: function(aWindow) {
    // Wait for the window to finish loading
    function loadListener() {
      domWindow.removeEventListener("load", loadListener, false);
      loadIntoWindow(domWindow);
    };
    domWindow.addEventListener("load", loadListener, false);
  },
  onCloseWindow: function(aWindow) {},
  onWindowTitleChange: function(aWindow, aTitle) {}
};

function startup(aData, aReason) {
  // Load into any existing windows
  let windows = Services.wm.getEnumerator("navigator:browser");
  while (windows.hasMoreElements()) {
    let domWindow = windows.getNext().QueryInterface(Ci.nsIDOMWindow);
    loadIntoWindow(domWindow);
  }
  // Load into any new windows
  Services.wm.addListener(windowListener);
}

function shutdown(aData, aReason) {
  // When the application is shutting down we normally don't have to clean
  // up any UI changes made
  if (aReason == APP_SHUTDOWN) {
    return;
  }
  // Stop listening for new windows
  Services.wm.removeListener(windowListener);
  // Unload from any existing windows
  let windows = Services.wm.getEnumerator("navigator:browser");
  while (windows.hasMoreElements()) {
    let domWindow = windows.getNext().QueryInterface(Ci.nsIDOMWindow);
    unloadFromWindow(domWindow);
  }
}

function install(aData, aReason) {}

function uninstall(aData, aReason) {}

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