Android phone plugin ActionBar wrapper

Question

Android phone plugin ActionBar wrapper

I'm trying to add iOS TabBar style navigation using my own Android controls, so ActionBar is in my PhoneGap app. I want my JavaScript to receive callbacks when changing tabs, and ideally I would like the ActionBar to be fully dynamically populated with JavaScript (like iOS Native TabBar in PhoneGap). I know that I can do this at the JS / CSS / HTML level, but I would like to seriously consider using my own controls before I do this.

I have successfully added an ActionBar to my Android phonegap application by modifying onCreate to contain:

public void onCreate(Bundle savedInstanceState) {
    this.setBooleanProperty("showTitle", true);

    super.onCreate(savedInstanceState);

    getWindow().requestFeature(Window.FEATURE_ACTION_BAR);

    ActionBar bar = getActionBar();

    bar.setDisplayShowTitleEnabled(false); 
    bar.setDisplayShowHomeEnabled(false);
    bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    Tab tab = bar.newTab()
        .setText("Test")
        .setTabListener(new TestListener());

    bar.addTab(tab);
    bar.show();

    super.loadUrl("file:///android_asset/www/index.html");
}

I try to make it more beautiful by creating a plugin around it using very similar iOS NativeControls mechanisms:

public PluginResult execute(String action, JSONArray data, String callbackId) {
    PluginResult.Status status = PluginResult.Status.OK;
    String result = "";

    if(INIT.equals(action)) {
        ActionBar bar = cordova.getActivity().getActionBar();
        Tab tab = bar.newTab()
            .setText("Test")
            .setTabListener(new TestListener());

        // CRASHES HERE
        bar.addTab(tab);
        bar.show();
    }

    return new PluginResult(status, result);
}

, , ActionBar onCreate. , onCreate javascript , , java JavaScript - . "success", keepCallback. , , java, :

MyActionBar.prototype.setCallback = function(tabIndex, callback) {
    cordova.exec(function () {
            console.log("Set callback succeeded");
    },              
    function() {
            console.log("SetCallback failed");
    },              
    "MyActionBar",
    "setCallback", [tabIndex, callback // <--- Calls THIS callback on click
    ]);
};