Draw Line on touch (android)

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Java

Mobile

Android

game

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This is part of my code...In this code is 1 animatedSPrite that user controls. I want that user can draw line on this background and that this animatedsprite can move on this line...
PLease help :/

public Scene onCreateScene() {
		
		
		this.mEngine.registerUpdateHandler(new FPSLogger());

		final Scene scene = new Scene();
		float centerx = (CAMERA_WIDTH - this.trpozadina.getWidth()) / 2;
		float centery = (CAMERA_HEIGHT - this.trpozadina.getHeight()) / 2;
		final Sprite sprite = new Sprite(centerx, centery, this.trpozadina,
				this.getVertexBufferObjectManager());
		final SpriteBackground pozadina = new SpriteBackground(sprite);
		scene.setBackground(pozadina);<big><big><big></big></big></big>
		
		final Sprite sprvrata = new Sprite (this.CAMERA_WIDTH - 75, (CAMERA_HEIGHT / 2) + 15, this.trvrata,
				this.getVertexBufferObjectManager());

		this.animsprigracBezMaca = new AnimatedSprite(CAMERA_WIDTH / 2 - 32,
				(CAMERA_HEIGHT / 2) + 30, 65, 120, this.trigracBezMaca,
				this.getVertexBufferObjectManager()) {

			@Override
			public boolean onAreaTouched(final TouchEvent pSceneTouchEvent,
					final float pTouchAreaLocalX, final float pTouchAreaLocalY) {

				switch (pSceneTouchEvent.getAction()) {
				case TouchEvent.ACTION_DOWN:
					bool_sa_ili_bez_maca = !bool_sa_ili_bez_maca;
					animsprigracBezMaca.setVisible(bool_sa_ili_bez_maca);
					animsprigracSaMacem.setVisible(!bool_sa_ili_bez_maca);
					break;

				case TouchEvent.ACTION_MOVE:

					break;

				case TouchEvent.ACTION_UP:

					break;

				}
				return true;
			}
		};

		this.animsprigracSaMacem = new AnimatedSprite(CAMERA_WIDTH / 2 - 32,
				(CAMERA_HEIGHT / 2) + 30, 65, 120, this.trigracSaMacem,
				this.getVertexBufferObjectManager()) {

			@Override
			public boolean onAreaTouched(final TouchEvent pSceneTouchEvent,
					final float pTouchAreaLocalX, final float pTouchAreaLocalY) {

				switch (pSceneTouchEvent.getAction()) {
				case TouchEvent.ACTION_DOWN:
					bool_sa_ili_bez_maca = !bool_sa_ili_bez_maca;
					animsprigracBezMaca.setVisible(bool_sa_ili_bez_maca);
					animsprigracSaMacem.setVisible(!bool_sa_ili_bez_maca);
					break;

				case TouchEvent.ACTION_MOVE:

					break;

				case TouchEvent.ACTION_UP:

					break;

				}
				return true;
			}
		};