Question

I am using AndEngines onSceneTouchEvent method to create a jump affect for a sprite.

The issue i am having is that if the user touches the screen for instance they triple tap the screen the sprite will keep jumping, what i want is for it to receive only 1 click and do one jump for the one touch.

Here is what i am using which is causing this issue.
As you see i try to use a mIsJumping boolean and when the player collides with a invisible rectangle, it is set to false again to allow for jumping again.

@Override
public boolean onSceneTouchEvent(Scene pScene, TouchEvent pSceneTouchEvent) {

    if(pSceneTouchEvent.isActionUp()){

             if(mIsJumping == false){
                    SequenceEntityModifier jumpModifier = new SequenceEntityModifier(
                                new MoveYModifier(.6f, player.getY(), player.getY() - 250, EaseQuadOut.getInstance()),
                                new MoveYModifier(.6f, player.getY() - 250, player.getY(), EaseBounceOut.getInstance()));
                        player.registerEntityModifier(jumpModifier);

            }


    }



    return false;
}

From my description above how can i only register one touch even and jump once until the sprite collides with the rectangle?

Answer 1

There’s even an easier solution – use an IEntityModifierListener.

Create the listener this way:

final IEntityModifier.IEntityModifierListener listener = new IEntityModifier.IEntityModifierListener() {

        @Override
        public void onModifierStarted(IModifier<IEntity> pModifier,
                IEntity pItem) {

        }

        @Override
        public void onModifierFinished(IModifier<IEntity> pModifier,
                    IEntity pItem) {
            mIsJumping = false;

        }

};

Register it to the MoveYModifier that moves the player down. So, when the modifying ends (The jump modification ends), mIsJumping will be false. Also, remember to set mIsJumping to true when the jump starts.