bevy/examples/input/gamepad_input.rs

use bevy::{input::gamepad::GamepadButton, prelude::*};

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_system(gamepad_system)
        .run();
}

fn gamepad_system(
    gamepads: Res<Gamepads>,
    button_inputs: Res<Input<GamepadButton>>,
    button_axes: Res<Axis<GamepadButton>>,
    axes: Res<Axis<GamepadAxis>>,
) {
    for gamepad in gamepads.iter().cloned() {
        if button_inputs.just_pressed(GamepadButton::new(gamepad, GamepadButtonType::South)) {
            info!("{:?} just pressed South", gamepad);
        } else if button_inputs.just_released(GamepadButton::new(gamepad, GamepadButtonType::South))
        {
            info!("{:?} just released South", gamepad);
        }

        let right_trigger = button_axes
            .get(GamepadButton::new(
                gamepad,
                GamepadButtonType::RightTrigger2,
            ))
            .unwrap();
        if right_trigger.abs() > 0.01 {
            info!("{:?} RightTrigger2 value is {}", gamepad, right_trigger);
        }

        let left_stick_x = axes
            .get(GamepadAxis::new(gamepad, GamepadAxisType::LeftStickX))
            .unwrap();
        if left_stick_x.abs() > 0.01 {
            info!("{:?} LeftStickX value is {}", gamepad, left_stick_x);
        }
    }
}