Cropping images in Android apps

Image cropping is often used in Android applications. Next we will set the photo in the album as the user's avatar to explain how to achieve cropping in Android.

<? XML version = "1.0" encoding = "UTF-8"?> <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: Orientation = "vertical" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent"> <imageview Android: id = "@ + ID/imageid" Android: adjustviewbounds = "true" Android: src = "@ drawable/Shan" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <button Android: Id = "@ + ID/imageclipping" Android: layout_height = "50dip" Android: text = "cropping images" Android: layout_width = "150dip"/> </linearlayout>
Package COM. test; import Java. io. bytearrayoutputstream; import Java. io. file; import Java. io. fileoutputstream; import Java. io. ioexception; import android. app. activity; import android. content. intent; import android. graphics. bitmap; import android. graphics. drawable. bitmapdrawable; import android. graphics. drawable. drawable; import android.net. uri; import android. OS. bundle; import android. OS. environment; import android Oid. provider. mediastore; import android. util. log; import android. view. view; import android. view. view. onclicklistener; import android. widget. button; import android. widget. imageview; import android. widget. toast; public class mainactivity extends activity {public static final int photozoom = 2; // scale public static final int photoresoult = 3; // result private string filename = environment. getexternalstoragedirecto Ry (). getabsolutepath () + "/temp.jpeg"; public static final string image_unspecified = "image/*"; imageview = NULL; button imageclippingbtn = NULL; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); imageview = (imageview) findviewbyid (R. id. imageid); imageclippingbtn = (button) findviewbyid (R. id. imageconping); imagecl Ippingbtn. setonclicklistener (New onclicklistener () {@ override public void onclick (view v) {drawable d = imageview. getdrawable (); Bitmap bitmap = (bitmapdrawable) d ). getbitmap (); savemybitmap (filename, bitmap); Uri uri = Uri. fromfile (new file (filename); startphotozoom (URI) ;}}) ;}@ override protected void onactivityresult (INT requestcode, int resultcode, intent data) {// processing result if (requestcode = phot Oresoult) {bundle extras = data. getextras (); If (extras! = NULL) {bitmap photo = extras. getparcelable ("data"); bytearrayoutputstream stream = new bytearrayoutputstream (); photo. compress (bitmap. compressformat. JPEG, 75, stream); // (0-100) compresses the imageview file. setimagebitmap (photo);} super. onactivityresult (requestcode, resultcode, data);} // image cropping method public void startphotozoom (URI) {intent = new intent ("com. android. camera. action. crop "); intent. setdataandtype (Uri, image_unspecified); intent. putextra ("crop", "true"); // aspectx aspecty is a width-high ratio intent. putextra ("aspectx", 1); intent. putextra ("aspecty", 1); // outputx outputy is the width and height intent of the cropped image. putextra ("outputx", 64); intent. putextra ("outputy", 64); intent. putextra ("Return-Data", true); startactivityforresult (intent, photoresoult);} // save bitmap as the public void savemybitmap (string filename, bitmap mbitmap) {file F = NULL; fileoutputstream fout = NULL; try {log. E ("mainactivity", "filename:" + filename); F = new file (filename); F. createnewfile (); fout = new fileoutputstream (f); mbitmap. compress (bitmap. compressformat. JPEG, 100, fout);} catch (exception e) {e. printstacktrace ();} Try {fout. flush ();} catch (exception e) {e. printstacktrace ();} Try {fout. close ();} catch (ioexception e) {e. printstacktrace ();}}