Android小游戏应用---撕破美女衣服游戏

ImageView after;
	ImageView before;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		after = (ImageView) findViewById(R.id.after);
		before= (ImageView) findViewById(R.id.before);
		Options options = new Options();
//		options.inSampleSize = 2;
		Bitmap afterMap = BitmapFactory.decodeResource(getResources(), R.drawable.g7_back,options );
		Bitmap beforeMap = BitmapFactory.decodeResource(getResources(), R.drawable.g7_up,options);
		//能够改动的bitmap
		final Bitmap alterMap = Bitmap.createBitmap(600, 600, beforeMap.getConfig());
		//创建画布
		final Canvas canvas = new Canvas(alterMap);
		//创建画笔
		final Paint paint = new Paint();
		paint.setColor(Color.BLACK);
		paint.setStrokeWidth(5);
		
		canvas.drawBitmap(beforeMap, new Matrix(), paint);
		
		after.setImageBitmap(afterMap);
		before.setImageBitmap(beforeMap);
		
		before.setOnTouchListener(new OnTouchListener() {
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				switch (event.getAction()) {
				case MotionEvent.ACTION_DOWN:
					break;
				case MotionEvent.ACTION_MOVE:
					int newX = (int) event.getX();
					int newY = (int) event.getY();
					for(int i=-8;i<8;i++){
						for(int j=-8;j<8;j++)
							alterMap.setPixel(i+newX, j+newY, Color.TRANSPARENT);
					}
					before.setImageBitmap(alterMap);
					break;
				case MotionEvent.ACTION_UP:
					break;
				default:
					break;
			}
			return true;
			}
		});
	}