CODEWITHSUNDEEP
androidcordovanativephonegap-plugins
gozzilli
gozzilli

Reputation: 8337

Using cordova plugin with a native Android interface

I wrote a Cordova plugin for Android to build a phonegap app with an HTML5 GUI.

I now want to have a native interface too and was wondering what is the neatest option to reuse my plugin for the native UI. Basically I would like to have two apps, one with a phonegap (HTML5) interface and one with a native Android interface, both of them using the Cordova plugin.

The plugin extends the CordovaPlugin class, so for this reason I don't know how to use it without calling the following method from the javascript in the WebView, as described here http://docs.phonegap.com/en/2.3.0/guide_plugin-development_android_index.md.html

exec(<successFunction>, <failFunction>, <service>, <action>, [<args>]);

I just want to call the native side of the plugin without going through a WebView:

@Override
public boolean execute(String action, JSONArray args,
        CallbackContext callbackContext) throws JSONException { ... }

Provided that I could just adapt the code from the plugin fairly easily, I would like to find a method by which the plugin remains exactly the same for better decoupling of frontend/backend (I could change the code in one app without the need to replicate it in the other app).

Is this possible at all? I understand this is not the point of having a Cordova plugin, but I would like to find a way around it.

Thanks.

Upvotes: 0

Views: 3979

Answers (1)

gingo
gingo

Reputation: 3169

In my opinion you need to apply Facade pattern:

http://en.wikipedia.org/wiki/Facade_pattern

Simply extract your business logic from Cordova plugin to dedicated class called MyFacade and hide all your business logic behind.

The other way is to do something like this:

MyCordovaPlugin myPlugin = new MyCordovaPlugin();
myPlugin.execute("foo", new JSONArray(), new MyCallbackContext() {
    @override
    public void handlePluginResult(PluginResult pluginResult) {
        //your code for handling plugin result for Android UI
    }
}

Where MyCallbackContext implementation is:

public abstract class MyCallbackContext extends CallbackContext {

    public MyCallbackContext() {
        super(null, null);
    }

    public void sendPluginResult(PluginResult pluginResult) {
        synchronized (this) {
            if (finished) {
                Log.w(LOG_TAG, "Attempted to send a second callback for ID: " + callbackId + "\nResult was: " + pluginResult.getMessage());
                return;
            } else {
                finished = !pluginResult.getKeepCallback();
            }
        }

        handlePluginResult(pluginResult);
    }

    public abstract void handlePluginResult(PluginResult pluginResult);

}

This second way works only with current version of Cordova and is based on this source codes:

https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/api/CordovaPlugin.java

https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/api/CallbackContext.java

Upvotes: 1

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