扒美女衣服原版来自日本妄撮游戏，如今介绍一下它的实现原理。

1、两张美女图片，一张穿着衣服，一张没穿衣服。

2、採用FrameLayout将穿衣服的图片放在上面，没穿衣服的放在以下

3、当触摸图片时，将触摸位置处的图片设为透明。

这样就能够看到以下没穿衣服的图片，哈哈，是不是非常easy。

以下来看详细代码：

Layout布局两张图片叠加在一起

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent" ><ImageViewandroid:id="@+id/iv_after"android:layout_width="wrap_content"android:layout_height="wrap_content" /><ImageViewandroid:id="@+id/iv_before"android:layout_width="wrap_content"android:layout_height="wrap_content" /></FrameLayout>

主程序代码：

public class bayifu extends Activity {private ImageView iv_after;private ImageView iv_before;private Bitmap alterBitmap;private Canvas canvas;private Paint paint;private Bitmap after;private Bitmap before;@Overrideprotected void onCreate(Bundle savedInstanceState) {int[] imageIds1 = new int[] { R.drawable.pre1, R.drawable.pre2,R.drawable.pre3, R.drawable.pre4, R.drawable.pre5,R.drawable.pre6, R.drawable.pre7, R.drawable.pre8,R.drawable.pre9, R.drawable.pre10, R.drawable.pre11,R.drawable.pre12, R.drawable.pre13, R.drawable.pre14,R.drawable.pre15, R.drawable.pre16, R.drawable.pre17,R.drawable.pre18, R.drawable.pre19, R.drawable.pre20,R.drawable.pre21 };int[] imageIds2 = new int[] { R.drawable.after1, R.drawable.after2,R.drawable.after3, R.drawable.after4, R.drawable.after5,R.drawable.after6, R.drawable.after7, R.drawable.after8,R.drawable.after9, R.drawable.after10, R.drawable.after11,R.drawable.after12, R.drawable.after13, R.drawable.after14,R.drawable.after15, R.drawable.after16, R.drawable.after17,R.drawable.after18, R.drawable.after19, R.drawable.after20,R.drawable.after21 };// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.tuoyifulayout);Intent ic = getIntent();Bundle bd = ic.getExtras();String is = bd.getString("num");int position = Integer.parseInt(is);BitmapFactory.Options opts = new Options();opts.inSampleSize = 1;iv_after = (ImageView) findViewById(R.id.iv_after);iv_before = (ImageView) findViewById(R.id.iv_before);after = BitmapFactory.decodeResource(getResources(),imageIds2[position], opts);before = BitmapFactory.decodeResource(getResources(),imageIds1[position], opts);// 能够改动的空白的bitmapalterBitmap = Bitmap.createBitmap(before.getWidth(),before.getHeight(), before.getConfig());canvas = new Canvas(alterBitmap);paint = new Paint();paint.setStrokeCap(Cap.ROUND);paint.setStrokeJoin(Join.ROUND);paint.setStrokeWidth(5);paint.setColor(Color.BLACK);paint.setAntiAlias(true);canvas.drawBitmap(before, new Matrix(), paint);//在ImageView中设置了重叠的两张图片iv_after.setImageBitmap(after);iv_before.setImageBitmap(before);iv_before.setOnTouchListener(new OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stubswitch (event.getAction()) {case MotionEvent.ACTION_DOWN:break;case MotionEvent.ACTION_MOVE:int newX = (int) event.getX();int newY = (int) event.getY();//将触摸区域。图片的像素设为透明for (int i = -10; i < 10; i++) {for (int j = -10; j < 10; j++) {if (i + newX >= 0 && j + newY >= 0&& i + newX <= before.getWidth()&& j + newY <= before.getHeight())alterBitmap.setPixel(i + newX, j + newY,Color.TRANSPARENT);}}iv_before.setImageBitmap(alterBitmap);break;}return true;}});}}

3、效果图