Callback for using game points outside the game

How do I...?
1

Hi, I’m Sebastian from Uruguay.
I’m working on an Android app with games and I’m planning to add a simple 2d game.

I need to get the points generated in the 2d games to use them in the app.
Is there any callback to get this points once the player finish the game?

2

What do you mean with points? I guess you can create an object, get its x and y value and store it in a globlal Js namespace, if your app is in Js. How do you plan to create your app exactly? Wich technologies will be involved?

3

When I say points I mean the game score, if I can get that score so I can use it to give trophies for example in the app.
The app is already up and working, it’s an Android app.
In the app we have a quiz, and you win points by completing this quiz. Then you can use those points to get discounts in our store.

I would like to do the same with a 2d game

4

This doesn’t tells me much about technologies used. Did you use plain Java, a webview with Js, a framework like Cordova or xamarin, something else?

5

The app is made in kotlin

6

How do you plan to embedd the GDevelop game? Through a webview?

7

If I export it in html5 I guess a webview should be fine.
I noticed that there is an action that let you save a json with the value of a variable, I haven’t figured it out yet

8

It’s for PC only, that won’t do the job. The way to go is in my opinion are Javascript Interfaces. Create a class like this:

public class JavaScriptInterface {
    Context mContext;

    /** Instantiate the interface and set the context */
    JavaScriptInterface(Context c) {
        mContext = c;
    }

    /** Show a toast from the web page */
    @JavascriptInterface
    public void showToast(String toast) {
        Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
    }
}

To create an interface. Then, use something like this in your webview:

webView.addJavascriptInterface(new JavaScriptInterface(this), "Android");

Where the second argument is the namespace you attribute in the Js environment. Then you can in GDevelop use a Js event to call the Java function from the interface, in that case like this:

Android.showToast("hello");

Use it to modify variables in your app instead to values of GDevelop variables.

2 Likes
9

Nice, I’m going to try this.
Thanks!