Ui review-component: imageview (image scaling)

Package COM. brady. est; import android. annotation. suppresslint; import android. graphics. bitmap; import android. graphics. drawable. bitmapdrawable; import android. OS. bundle; import android. support. v7.app. actionbaractivity; import android. view. menu; import android. view. menuitem; import android. view. motionevent; import android. view. view; import android. view. view. onclicklistener; import android. view. view. ontouchlistener; import android. widget. button; import android. widget. imageview; import android. widget. textview; @ suppresslint ({"handlerleak", "clickableviewaccessibility"}) public class mainactivity extends actionbaractivity {private int [] images = new int [] {R. drawable. a, R. drawable. b, R. drawable. c, R. drawable. d}; int currentimage = 0; @ override protected void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. activity_main); Final button = (button) findviewbyid (R. id. button); Final imageview imageview1 = (imageview) findviewbyid (R. id. image1); Final imageview imageview2 = (imageview) findviewbyid (R. id. image2); Final textview detail = (textview) findviewbyid (R. id. detail); button. setonclicklistener (New onclicklistener () {@ override public void onclick (view v) {imageview1.setimageresource (images [currentimage % images. length]); currentimage ++ ;}}); imageview1.setontouchlistener (New ontouchlistener () {@ override public Boolean ontouch (view V, motionevent event) {bitmapdrawable = (bitmapdrawable) imageview1.getdrawable (); Bitmap bitmap = bitmapdrawable. getbitmap (); // scaling ratio double scale = bitmap. getwidth ()/imageview1.getwidth (); int x = (INT) (event. getx () * scale); int y = (INT) (event. gety () * scale); If (x + 150> bitmap. getwidth () {x = bitmap. getwidth ()-150;} If (Y + 100> bitmap. getheight () {Y = bitmap. getheight ()-150;} detail. settext (scale + "\ n" + "X:" + x + "\ n" + bitmap. getwidth () + "\ n" + "Y:" + Y + "\ n" + bitmap. getheight (); imageview2.setimagebitmap (bitmap. createbitmap (bitmap, X, Y, 100,100); Return false ;}}) ;}@ override public Boolean oncreateoptionsmenu (menu) {// inflate the menu; this adds items to the action bar if it is present. getmenuinflater (). inflate (R. menu. main, menu); Return true ;}@ override public Boolean onoptionsitemselected (menuitem item) {// handle action bar item clicks here. the action bar will // automatically handle clicks on the home/Up button, so long // As you specify a parent activity in androidmanifest. XML. int id = item. getitemid (); If (ID = R. id. action_settings) {return true;} return Super. onoptionsitemselected (item );}}

Layout XML files

<Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" xmlns: Tools = "http://schemas.android.com/tools" Android: layout_width = "match_parent" Android: layout_height = "match_parent" Android: Orientation = "vertical" Android: id = "@ + ID/root" Android: padding = "5dip" tools: context = "com. brady. EST. mainactivity "> <imageview Android: Id =" @ + ID/image1 "Android: layout_width =" 200px "Android: layout_height =" wrap_content "Android: src = "@ drawable/a"/> <button Android: Id = "@ + ID/button" Android: text = "Next" Android: layout_width = "match_parent" Android: layout_height = "wrap_content"/> <imageview Android: Id = "@ + ID/image2" Android: layout_width = "120px" Android: layout_height = "wrap_content"/> <textview Android: id = "@ + ID/detail" Android: layout_width = "match_parent" Android: layout_height = "wrap_content"/> </linearlayout>

Interface:

Ui review-component: imageview (image scaling)