Button Touch for Android

Questions & Answers
1

Hi.

I can’t seem to figure out how to create a button for an android device. What I mostly want right now is if the button is pressed and held, the variable will be true. (example: if the shoot button is held, the spaceship continues to shoot.) I can make the spaceship shoot, but input.touch seems to elude my understanding!

I’d prefer the answer in C#, but I can work with java, and would appreciate any feedback!

Thanks!

2

Hey there!
So I would highly recommend you follow this video tutorial. It is very good and will help a lot.
Unity Touchscreen Input Tutorial - YouTube (It works on both Android and iOS)

On my Android game I then made a few panels (they were invisible) in the scene that could be viewed by the camera (it was 2D). Then I added scripts to these panels that looked kind of like this;

public PlayerController playerController;

void OnTouchDown() {
	playerController.setLeftDown(true); // Obviosuly this can be extended to more than left and right booleans
}

I hope that this helps and if you have any questions feel free to ask!! :slight_smile:

3

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Character : MonoBehaviour {

[HideInInspector] public bool facingRight = true;
[HideInInspector] public float moveForce = 50f;
[HideInInspector] public float maxSpeed = 10f;
[HideInInspector] public float currentSpeed = 0.0f;
[HideInInspector] public float touchRun = 0.0f;
[HideInInspector] public float jumpSpeed = 0.0f;

private Rigidbody2D rb2d;
private float ScreenWidth;
private Animator animator;

public Transform groundCheck;
public bool grounded = false;
public float jumpForce = 800f;

private bool jump = false;

// Use this for initialization
void Awake () {
	rb2d = GetComponent();
	ScreenWidth = Screen.width;
	animator = GetComponent ();
}

// Update is called once per frame
void Update () {
	grounded = Physics2D.Linecast (transform.position, groundCheck.position, 1 << LayerMask.NameToLayer ("Ground"));
	animator.SetBool ("isGrounded", grounded);
	if (Input.GetButtonDown ("Jump")) {
		jump = true;
	}
	
	touchRun = 0.0f;
	//-----TOUCH CONTROLS------
	int i = 0;
	//loop over every touch found
	while (i < Input.touchCount) {
		if (Input.GetTouch (i).position.x < ScreenWidth / 4) {
			//move left
			touchRun = -1.0f;

		} else if (Input.GetTouch (i).position.x < ScreenWidth / 2) {
			//move right
			touchRun = 1.0f;
		}
		if (Input.GetTouch (i).phase == TouchPhase.Began && Input.GetTouch (i).position.x > ScreenWidth * 0.5) {
			jump = true;
		}
		++i;
	}

	//-----CONTROLLER------
	#if UNITY_EDITOR
	touchRun = Input.GetAxis("Horizontal");
	#endif

}

void FixedUpdate(){
	moveCharacter(touchRun);

	if (jump)
		JumpCharacter ();

	float characterSpeed = Mathf.Abs (rb2d.velocity.x);
	animator.SetFloat ("Speed", characterSpeed);
}

void JumpCharacter(){
	if (grounded) {
		rb2d.AddForce (new Vector2 (0f, jumpForce));
		grounded = false;
	}
	jump = false;
}

void moveCharacter(float h){
	//float modMoveForce = grounded ? moveForce : moveForce * 1; //slow down if in air
	if (h * rb2d.velocity.x < maxSpeed)
		rb2d.AddForce (Vector2.right * h * moveForce);

	if (Mathf.Abs (rb2d.velocity.x) > maxSpeed)
		rb2d.velocity = new Vector2 (Mathf.Sign (rb2d.velocity.x) * maxSpeed, rb2d.velocity.y);

	if (h > 0 && !facingRight)
		Flip ();
	else if (h < 0 && facingRight)
		Flip ();
}
void Flip()	{
	facingRight = !facingRight;
	Vector3 theScale = transform.localScale;
	theScale.x *= -1;
	transform.localScale = theScale;
	rb2d.velocity = new Vector2 (rb2d.velocity.x * 0.75f, rb2d.velocity.y);

}

}