GetKeyDown input only plays first frame of animation

I'm trying to control a set of character animations but I'm having trouble with the jump animations. My horizontal walk animations are working fine but when I hit the jump button I want one of two jump animations to play depending on whether the player is in an idle or walking state. However when I press the jump button currently it only plays the first frame of the respective jump animation and then goes right back to either idle or walk. How do I get the entire jump animation to play when the jump button is pressed?

using UnityEngine;
using System.Collections;

public class AsherBlackMover : MonoBehaviour {

public float moveSpeed = 3;
public float rotateSpeed = 10;
public Transform graphics;
public SkeletonAnimation skeletonAnimation;
public Vector2 jumpVector;
public bool isGrounded;

// isGrounded Variables
public Transform grounderPosition;
public float grounderRadius;
public LayerMask grounderLayerMask;

private Rigidbody2D asherBlackRB;
private Animator asherBlackAnim;

Quaternion goalRotation = Quaternion.identity;
float xDir;
float yDir;
string currentAnimation = "";

void Start ()
{
// Create a reference to Asher Black Rigidbody2D
asherBlackRB = GetComponent<Rigidbody2D>();
}

void Update ()
{
xDir = Input.GetAxis ("Horizontal") * moveSpeed;

if (xDir > 0) // ------ Walk Right
{
goalRotation = Quaternion.Euler (0, 0, 0);
SetAnimation ("Walk", true);
}
else if (xDir < 0) // ------ Walk Left
{
goalRotation = Quaternion.Euler (0, 180, 0);
SetAnimation ("Walk", true);
}
else if (isGrounded == true) // ------ Idle
{
SetAnimation ("Idle", true);
}

// Jump Button
if (Input.GetKeyDown("space") && isGrounded == true)
{
isGrounded = false;

if (xDir > 0)
{
Jump ("Walk-Jump");
}
else if (xDir < 0)
{
Jump ("Walk-Jump");
}
else
{
Jump ("Idle-Jump");
}
}

// Circle on character that determines when grounded or not
isGrounded = Physics2D.OverlapCircle (grounderPosition.transform.position, grounderRadius, grounderLayerMask);

// Flip character smothly to emulate paper mario effect
graphics.localRotation = Quaternion.Lerp (graphics.localRotation, goalRotation, rotateSpeed * Time.deltaTime);
}

void OnDrawGizmos ()
{
Gizmos.color = Color.yellow;
Gizmos.DrawWireSphere (grounderPosition.transform.position, grounderRadius);
}

void SetAnimation (string name, bool loop)
{
if (name == currentAnimation)
{
return;
}
skeletonAnimation.state.SetAnimation (0, name, loop);
currentAnimation = name;
}

void Jump (string animName)
{
asherBlackRB.AddForce (jumpVector, ForceMode2D.Force);
SetAnimation (animName, true);
}

// Physics Updates
void FixedUpdate ()
{
asherBlackRB.velocity = new Vector2 (xDir, asherBlackRB.velocity.y);
}
}

 

I am no expert in C#; pretty new to it actually. But I think it has to do with your setting isGrounded to false.

The animation starts to play because isGrounded is true. Then it gets set to false immediately before it has a chance to get to the next frame.

The animation needs to be allowed play to the end before you set isGrounded back to true.