Tear clothes for Android multimedia development and learning

Tear clothes for Android multimedia development and learning

Today we are learning to tear clothes. Let me first talk about the principle of tearing clothes: There are two pictures of tearing clothes, one is a picture of a beautiful woman wearing a coat, and the other is a picture of a beautiful woman wearing a lingerie. When our fingers slide, we set the pictures of beautiful women in the coat to transparent color, so that the following picture is displayed.

 

Directly run the Code:

 

Public class MainActivity extends Activity {private Bitmap BMP copy; private Paint paint; private Canvas canvas; private ImageView imageView; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); // 1: Because I modify the coat image, set the copy Bitmap BMP = BitmapFactory for the coat. decodeResource (getResources (), R. drawable. awaiyi); BMP copy = Bitmap. createBitmap (bmp src. getWidth (), bmp src. getHeight (), bmp src. getConfig (); paint = new Paint (); canvas = new Canvas (BMP copy); canvas. drawBitmap (bmp src, new Matrix (), paint); imageView = (ImageView) findViewById (R. id. lv2); imageView. setImageBitmap (BMP copy); // 2: listens to the imageView of the touch event. setOnTouchListener (new OnTouchListener () {@ Overridepublic boolean onTouch (View v, MotionEvent event) {// We only care about the sliding event switch (event. getAction () {case MotionEvent. ACTION_MOVE: // the trajectory of finger sliding is set to transparent int x = (int) event. getX (); int y = (int) event. getY (); cleanImage (x, y); break; default: break;} return true ;}}) ;}// because only one pixel is set at a time, public void cleanImage (int x, int y) {for (int I =-10; I <10; I ++) {for (int j =-10; j <10; j ++) {// draw if (Math. sqrt (I * I + j * j) <= 10) {// determines whether the finger has crossed the border. if the cross border is not processed, if (x + I <BMP copy. getWidth () & y + j <BMP copy. getHeight () & x + I> = 0 & y + j> = 0) {// you can specify a transparent BMP copy. setPixel (x + I, y + j, Color. TRANSPARENT); // sets the image imageView. setImageBitmap (BMP copy );}}}}}}

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