how to crop face from image in android -


i want crop face image in android . after searching lot in internet , i have come know tutorial . have imageview . 

    iv1 = (imageview) mainactivity.this.findviewbyid(r.id.img1);

when tap imageview pick image gallery . code follows : 

iv1.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view arg0) {                 // todo auto-generated method stub                 intent photopickerintent = new intent(intent.action_pick);                 photopickerintent.settype("image/*");                 startactivityforresult(photopickerintent, select_photo);                 imgno = 1;              }         });

in onactivityresult method , trying crop face image according following code : 

if (resultcode == result_ok && imgno == 1 )                  {                     selectedimage = imagereturnedintent.getdata();                     try {                         imagestream = getcontentresolver().openinputstream(                                 selectedimage);                     } catch (filenotfoundexception e) {                         // todo auto-generated catch block                         e.printstacktrace();                     }                     yourselectedimage = bitmapfactory.decodestream(imagestream);                      //  iv1.setimagebitmap(yourselectedimage);                         path1 = selectedimage.getpath();                          viewheight = part2.getmeasuredheight();                         viewwidth = part2.getmeasuredwidth();                         try {                              paint paint = new paint();                             paint.setfilterbitmap(true);                             bitmap bitmaporg = yourselectedimage;                              int targetwidth = bitmaporg.getwidth();                             int targetheight = bitmaporg.getheight();                              bitmap targetbitmap = bitmap.createbitmap(targetwidth,                                     targetheight, bitmap.config.argb_8888);                              rectf rectf = new rectf(0, 0, viewwidth, viewheight);                              canvas canvas = new canvas(targetbitmap);                             path path = new path();                              path.addrect(rectf, path.direction.cw);                             canvas.clippath(path);                              canvas.drawbitmap(                                     bitmaporg,                                     new rect(0, 0, bitmaporg.getwidth(), bitmaporg                                             .getheight()), new rect(0, 0, targetwidth,                                             targetheight), paint);                              matrix matrix = new matrix();                             matrix.postscale(1f, 1f);                              bitmapfactory.options bitmapfatoryoptions = new bitmapfactory.options();                             bitmapfatoryoptions.inpreferredconfig = bitmap.config.rgb_565;                              bitmaporg = yourselectedimage;                              myface = new facedetector.face[5];                             myfacedetect = new facedetector(targetwidth, targetheight,                                     5);                             int numberoffacedetected = myfacedetect.findfaces(                                     bitmaporg, myface);                             bitmap resizedbitmap = null;                             if (numberoffacedetected > 0) {                                 pointf mymidpoint = null;                                 face face = myface[0];                                 mymidpoint = new pointf();                                 face.getmidpoint(mymidpoint);                                 myeyesdistance = face.eyesdistance() + 20;                                  if (mymidpoint.x + viewwidth > targetwidth) {                                     while (mymidpoint.x + viewwidth > targetwidth) {                                         mymidpoint.x--;                                     }                                 }                                 if (mymidpoint.y + viewheight > targetheight) {                                     while (mymidpoint.y + viewheight > targetheight) {                                         mymidpoint.y--;                                     }                                 }                                 resizedbitmap = bitmap.createbitmap(bitmaporg,                                         (int) (mymidpoint.x - myeyesdistance),                                         (int) (mymidpoint.y - myeyesdistance),                                         viewwidth, viewheight, matrix, true);                             } else {                                 resizedbitmap = bitmap.createbitmap(bitmaporg, 0, 0,                                         viewwidth, viewheight, matrix, true);                             }                             /* convert bitmap resource */                             // bitmap resizedbitmap = bitmap.createbitmap(targetbitmap,                             // 0,                             // 0, viewwidth, viewheight, matrix, true);                             bitmapdrawable bd = new  bitmapdrawable(resizedbitmap);                              iv1.setimagebitmap(getcroppedbitmap(bd.getbitmap()));                           } catch (exception e) {                             system.out.println("error1 : " + e.getmessage()                                     + e.tostring());                         }                         iv1.invalidate();                     }

but code not able crop face image picked gallery . how can crop face image ? advice of great .

you can try facedetector built in class

    facedetector.face[] face=new facedetector.face[20];       facedetector fd=new facedetector(200,200,2);     imageview v=(imageview)findviewbyid(r.id.imageview);     bitmapdrawable draw=(bitmapdrawable)v.getdrawable();      fd.findfaces(draw.getbitmap(), face);     //now face hold array face image

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