Android NDK: How to override onBackPressed in NativeActivity without java?

Question

My app is written entirely in C/C++ using NativeActivity, it has no Java code (based on "native-activity" NDK example). Pressing "back" button closes it (destroys activity), but I need other behaivor of this button because I have my own UI and menus which are displayed via OpenGL.

As I read, In order to change behaivor of "back" button, I need to override onBackPressed() method of Java activity class. But I don't use Java, can I reach this method from C/C++ to override it?

If no, is there another way to handle with "back" button using NDK, without java code?

Backing

NativeActivity is an Java class!! and you said you are using it!!, so you can override onBackPressed within it? – Dowable

No, I mean I'm using it like in "native-activity" NDK example: android_native_app_glue.h, struct android_app etc. – Backing

Answer 1

Solved: to prevent default "Back" button behaivor it is enough to return 1 while handling key event:

int32_t app_handle_event(struct android_app* app, AInputEvent* event) {
    if (AKeyEvent_getKeyCode(event) == AKEYCODE_BACK) {
        // actions on back key
        return 1; // <-- prevent default handler
    };
    // ...
    return 0;
}

Backing