Make A Sprite Jump

I want to make a sprite\bitmap jump using only android (no game engines). I wasn't able to find tutorials on how to do so in android using only canvas and views, but I did find a t

Solution 1:

So I think what is happening in your code is that it's hitting the max height in the game loop and adding back to the y of the sprite. Second game loop run it is no longer above or near the max height distance therefore you stop going down and your start position becomes that position in the air. On a third loop through you hit spacebar again and your sprite starts the whole jumping processes over and the same thing happens on the next to loops through or however many it takes to trigger that if statement to get the sprite to start falling.

Good place to start is have a persistent boolean that determines whether or not the sprite is actually done climbing and jumping state should stay true while climbing and falling. See below.

booleanmaxJumpAchieved=false;
     if (mCurrentState == State.Jumping)
    {
        if (mStartingPosition.y - Position.y> 150)
        {
            maxJumpAchieved = true;
        }
        if (maxJumpAchieved) {
            mDirection.y = MOVE_DOWN;
            Position.y += mDirection.y * mSpeed;
        }
        if (Position.y > mStartingPosition.y)
        {
            maxJumpAchieved = false;
            Position.y = mStartingPosition.y;
            mCurrentState = State.Walking;
        }
    }

I think this should get you in the right direction but if you have issues let me know and I can edit my answer.

Another thing to note is don't set the mCurrentState to State.Walking until you know for sure you're on the ground otherwise you could double jump for days.