How to do custom image cropping in android -

in application, need take images gallery/camera, crop images, save cropped images else. below code of that, cannot crop images liking. using below code, can crop images using 4 coordinates, top, bottom, left , right side of image middle coordinates; need crop using 8 coordinates. this image shows mean.

public class mainactivity extends activity {   private static final int pick_from_camera = 1;   private static final int pick_from_gallery = 2;   private static final int press_ok = 3;   imageview imgview;   string m_path;   bitmap m_thepic;    @override   public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      imgview = (imageview) findviewbyid(r.id.imageview1);     button buttoncamera = (button) findviewbyid(r.id.btn_take_camera);     button buttongallery = (button) findviewbyid(r.id.btn_select_gallery);     button buttonok = (button) findviewbyid(r.id.btn_ok);      file folder = new file(environment.getexternalstoragedirectory().tostring() + "/images/");     folder.mkdirs();     buttoncamera.setonclicklistener(new view.onclicklistener() {       public void onclick(view v) {         // call android default camera         intent intent = new intent(mediastore.action_image_capture);         intent.putextra(mediastore.extra_output,                         mediastore.images.media.external_content_uri.tostring());         // ******** code crop image         intent.putextra("crop", "true");         intent.putextra("aspectx", 0);         intent.putextra("aspecty", 0);         intent.putextra("outputx", 100);         intent.putextra("outputy", 150);          try {           intent.putextra("return-data", true);           startactivityforresult(intent, pick_from_camera);         } catch (activitynotfoundexception e) {           // nothing         }       }     });     buttongallery.setonclicklistener(new view.onclicklistener() {       public void onclick(view v) {         // todo auto-generated method stub         intent intent = new intent();         // call android default gallery         intent.settype("image/*");         intent.setaction(intent.action_get_content);         // ******** code crop image         intent.putextra("crop", "true");         intent.putextra("aspectx", 0);         intent.putextra("aspecty", 0);         intent.putextra("outputx", 200);         intent.putextra("outputy", 150);          try {           intent.putextra("return-data", true);           startactivityforresult(intent.createchooser(intent, "complete action using"), 1);         } catch (activitynotfoundexception e) {           // nothing         }       }     });     buttonok.setonclicklistener(new view.onclicklistener() {       public void onclick(view v) {         string m_path = environment.getexternalstoragedirectory().tostring();         file m_imgdirectory = new file(m_path + "/images/");         file m_file = new file(m_path);         string m_fileid = "nm_tech" + system.currenttimemillis() + "";         m_file = new file(m_path, "/images/" + m_fileid + ".jpg");         uri outputfileuri = uri.fromfile(m_file);          intent intent = new intent(mainactivity.this,                                    imagegallerydemoactivity.class);         intent.putextra("image", m_fileid);         startactivity(intent);         // startactivityforresult(intent,press_ok);         // call android default camera         // toast.maketext(getapplicationcontext(), ,1234).show();       }     });   }    protected void onactivityresult(int requestcode, int resultcode, intent data) {     bundle extras = data.getextras();     bitmap m_thepic = extras.getparcelable("data");     string m_path = environment.getexternalstoragedirectory().tostring();     file m_imgdirectory = new file(m_path + "/images/");     if (!m_imgdirectory.exists()) {       m_imgdirectory.mkdir();     }     outputstream m_fout = null;     file m_file = new file(m_path);     m_file.delete();     string m_fileid = "nm_tech" + system.currenttimemillis() + "";     m_file = new file(m_path, "/images/" + m_fileid + ".jpg");     try {       if (!m_file.exists()) {         m_file.createnewfile();       }       m_fout = new fileoutputstream(m_file);       bitmap m_bitmap = m_thepic.copy(bitmap.config.argb_8888, true);       m_bitmap.compress(bitmap.compressformat.png, 100, m_fout);       m_fout.flush();       m_fout.close();       mediastore.images.media.insertimage(getcontentresolver(),                       m_file.getabsolutepath(),                                           m_file.getname(),                                           m_file.getname());     } catch (exception p_e) {     }      if (requestcode == pick_from_camera) {       if (extras != null) {         // bitmap photo = extras.getparcelable("data");         imgview.setimagebitmap(m_thepic);       }     }      if (requestcode == pick_from_gallery) {       // bundle extras2 = data.getextras();       if (extras != null) {         imgview.setimagebitmap(m_thepic);       }     }      if (requestcode == press_ok) {       bundle extras11 = data.getextras();       bitmap bmp = (bitmap) extras.get("data");        /*        * bitmap photo = extras.getparcelable("data");        * imgview.setimagebitmap(photo); intent n=new        * intent(getapplicationcontext(),imagegallerydemoactivity.class);        * n.putextra("data",photo); startactivity(n);        */     }   } } 

here simple way create minimum needed rect array of coordinates

public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);                  setcontentview(r.layout.activity_main);     rect r = getrect(new int[]{10, 10, 20, 20, 30, 30}, new int[]{20, 100, 10, 110, 20, 100});     system.out.println(r.left + " " + r.top + " " + r.bottom + " " + r.right); }  public rect getrect(int[] x, int y[]){     rect r = new rect();         // set first coordinate, in order not include 0, 0     r.set(x[0], y[0], x[0], y[0]);     for(int = 1; < x.length; i++){         r.union(x[i], y[i]);     }     return r; } 

edit: have 8 points, call getrect this

rect recttodraw = getrect(new int{yourx1, yourx2, yourx3, yourx4, yourx5, yourx6, yourx7, yourx8,}, new int{youry1, youry2, youry3, youry4, youry5, youry6, youry7, youry8}); 

you can pass function ass many points want, not 8

hope helps , enjoy work