Set offset for BitmapDrawable while repeating in the x and y direction?

Question

I'm making a 2D platformer game. I have created a texture for the platform, that is meant to be repeated over and over to fill the entire platform, without going over. My first attempt was to draw all the pixels from the bitmap manually, but this caused the background to flicker through while moving the platform (the movement and drawing threads are seperate, so the movement can run at a specific speed, while the FPS doesn't need to suffer). I found this technique worked better:

// Init
bitmap = new BitmapDrawable(res, Texture.PLATFORM.getBitmap());
bitmap.setTileModeXY(Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);

// Drawing loop
int x = getX() + (isStill() ? 0 : (int)MainActivity.offsetX);
int y = getY() + (isStill() ? 0 : (int)MainActivity.offsetY);

bitmap.setBounds(x, y, x + getWidth(), y + getHeight());
bitmap.draw(canvas);

However, the bitmap appears to be staying static while the platform is acting as a "view hole" to see through to the bitmap. The only work around I can think of is to somehow "offset" the static bitmap:

bitmap.offset(x, y);

Obviously, that isn't a function. I couldn't find one that would do what I want when looking through the docs.

To summon things up, the BitmapDrawable is causing the background to not move with the platform, making it look super weird.

Thanks in advance!

Answer 1

Try these tips in your code:(I assumed the game moves forward in the horizontal direction)

1. The GUY should only move up and down(with the appropriate touch input) and not forward and backward as you want the focus(or camera alternatively) solely on the GUY.I noticed that the WALL was moving up in your video when the GUY moved from initial higher position of the wall to little bit lower position later, rectify this because the GUY should move down(try to implement Gravity effect).
2. The WALL should only move forward(mostly) and backward(less often I guess).The WALL shouldn't move up and down normally. Do not apply Gravity effect to it. You can create at least 2 BitmapDrawable instance of WALL for a screen. They are going to be reused sequencially(for eg: If the 1st one goes totally outside of the screen, reshow it in the desired position using setBounds() method) and continue same for others the whole game.
3. The currently BLUE BACKGROUND, if it is a part of a larger map, then it needs to be appropriately offsetted.
4. One of the obstacles that I can think of at the time of writing this is to move the WALL down until it goes out of the screen which results in the death of the GUY.
5. At those places, where I have used the word move, you need to use the setBounds(a, b, c, d) method to make necessary position based changes as I didn't find other way to update the position of a BitmapDrawable instance. I think, you need to use game framework like libGdx to get method of luxury like setOffset(x, y) or of similar sort.

Sorry that I could only present you the ideas without specific code as I do not have past experience working in a project like this. Hope, it helps you in anyway possible.