我已经完成了编码，因为我现在成功地获得了矩形绘图，我想要裁剪那个矩形区域。如果有很多矩形（意味着很多面），用户可以选择其中一个面或矩形，那个矩形面应该被裁剪，任何身体都可以帮助我......
以下是我的代码
class AndroidFaceDetector extends Activity {
public String path;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle bundle = this.getIntent().getExtras();
path = bundle.getString("mypath");
setContentView(new myView(this));
}
class myView extends View {
private int imageWidth, imageHeight;
private int numberOfFace = 5;
private FaceDetector myFaceDetect;
private FaceDetector.Face[] myFace;
float myEyesDistance;
int numberOfFaceDetected;
Bitmap myBitmap;
public myView(Context context) {
super(context);
System.out.println("CONSTRUCTOR");
System.out.println("path = "+path);
if (path != null) {
BitmapFactory.Options BitmapFactoryOptionsbfo = new BitmapFactory.Options();
BitmapFactoryOptionsbfo.inPreferredConfig = Bitmap.Config.RGB_565;
myBitmap = BitmapFactory.decodeFile(path, BitmapFactoryOptionsbfo);
imageWidth = myBitmap.getWidth();
imageHeight = myBitmap.getHeight();
myFace = new FaceDetector.Face[numberOfFace];
myFaceDetect = new FaceDetector(imageWidth, imageHeight, numberOfFace);
numberOfFaceDetected = myFaceDetect.findFaces(myBitmap, myFace);
} else {
Toast.makeText(AndroidFaceDetector.this, "Please Try again", Toast.LENGTH_SHORT).show();
}
}
@Override
protected void onDraw(Canvas canvas) {
System.out.println("ON DRAW IS CALLED");
if (myBitmap != null) {
canvas.drawBitmap(myBitmap, 0, 0, null);
Paint myPaint = new Paint();
myPaint.setColor(Color.GREEN);
myPaint.setStyle(Paint.Style.STROKE);
myPaint.setStrokeWidth(3);
for (int i = 0; i < numberOfFaceDetected; i++) {
Face face = myFace[i];
PointF myMidPoint = new PointF();
face.getMidPoint(myMidPoint);
myEyesDistance = face.eyesDistance();
canvas.drawRect((int) (myMidPoint.x - myEyesDistance), (int) (myMidPoint.y - myEyesDistance),
(int) (myMidPoint.x + myEyesDistance), (int) (myMidPoint.y + myEyesDistance), myPaint);
}
}
}
}
}