Unable to Capture Android Back Button Event in Cocos Creator 3.8.2

Cocos Creator
1

I am trying to capture the Android back button event in my Cocos Creator 3.8.2 project, but it is not working as expected.

I am using the following TypeScript code:

import { input, Input, KeyCode } from 'cc';

input.on(Input.EventType.KEY_DOWN, this.onKeyDown, this);

onKeyDown(event: EventKeyboard) {
    console.log("Key Pressed: ", event.keyCode);
    if (event.keyCode === KeyCode.MOBILE_BACK) {
        console.log("Android Back Button Pressed!");
        this.onBackPressed();
    }
}

But the event does not trigger at all when pressing the back button.

Java Code in AppActivity.java

To ensure the event is sent from native Android, I added:

@Override
public boolean onKeyDown(int keyCode, android.view.KeyEvent event) {
    if (keyCode == android.view.KeyEvent.KEYCODE_BACK) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                CocosJavascriptJavaBridge.evalString("cc.director.emit('back-button-pressed');");
            }
        });
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

And in Cocos Script, I added:

import { director } from 'cc';

director.on('back-button-pressed', this.onBackPressed, this);

onBackPressed() {
    console.log("Android Back Button Pressed - Handled in Cocos!");
}

Issue Observed:

  1. The app closes immediately when pressing the back button instead of executing onBackPressed().
  2. The onKeyDown() method in Java is triggered (confirmed via logs), but Cocos does not seem to intercept the event before the app closes.

How can I properly intercept and handle the back button event inside Cocos 3.8.2 without the app closing immediately?
@Tom_k

2

Your code seems correct.
can you try changing your import statement to this

import { input, Input, KeyCode, EventKeyboard } from 'cc';