? ? ? ? ? ? break;
? ? ? ? case APP_CMD_LOST_FOCUS:

? ? ? ? ? ? break;
? ? }
}

/**
?* This is the main entry point of a native application that is using
?* android_native_app_glue.? It runs in its own thread, with its own
?* event loop for receiving input events and doing other things.
?*/
void android_main(struct android_app* state) {
? ? struct engine engine;

? ? // Make sure glue isn't stripped.
? ? app_dummy();

? ? memset(&engine, 0, sizeof(engine));
? ? state->userData = &engine;
? ? state->onAppCmd = engine_handle_cmd;
? ? state->onInputEvent = engine_handle_input;
? ? engine.app = state;

? ? // Prepare to monitor accelerometer
? ? engine.sensorManager = ASensorManager_getInstance();
? ? engine.accelerometerSensor = ASensorManager_getDefaultSensor(engine.sensorManager,
? ? ? ? ? ? ASENSOR_TYPE_ACCELEROMETER);

? ? if (state->savedState != NULL) {
? ? ? ? // We are starting with a previous saved state; restore from it.
? ? ? ? engine.state = *(struct saved_state*)state->savedState;
? ? }

? ? int ident, events;
? ? struct android_poll_source* source;

? ? while (true)
? ? {
? ? ? ? while ((ident = ALooper_pollAll(0, NULL, &events, (void**)&source)) >= 0)
? ? ? ? {
? ? ? ? ? ? if (source != NULL)
? ? ? ? ? ? ? ? source->process(state, source);

? ? ? ? ? ? if (state->destroyRequested != 0)
? ? ? ? ? ? ? ? return;
? ? ? ? }

? ? ? ? engine_draw_frame(&engine);
? ? }

}

效果如图所示。