Implementation: textview free copy Function

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Package COM. example. copyfree; import android. app. actionbar; import android. app. activity; import android. app. alertdialog; import android. app. alertdialog. builder; import android. content. dialoginterface; import android. content. dialoginterface. onclicklistener; import android. OS. bundle; import android. OS. handler; import android. OS. message; import android. text. textutils; import android. text. method. hidereturnstransf Ormationmethod; import android. util. typedvalue; import android. view. gesturedetector; import android. view. menu; import android. view. menuitem; import android. view. motionevent; import android. view. scalegesturedetector; import android. view. view; import android. widget. edittext; import android. widget. textview; import android. widget. toast; public class copyfreeactivity extends activity {Private Static final string Tag = "selecttexttocopyactivity"; private float mscalefactor = 1; private comment mscaledetector; private gesturedetector mgesturedetector; private textview text; private edittext edit; Private Static final int zoom_in = 4; private Static final int zoom_out = 5; private final int max_zoom_in_size = 60; private final int max_zoom_out_size = 20; private final int the_size_of_per_zoom = 9; private Float mtextsize = 27; private int mzoommsg =-1; @ overrideprotected void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. activity_copy_free); initui () ;}@ overridepublic Boolean oncreateoptionsmenu (menu) {return true;} public void button (view) {If (textutils. isempty (edit. gettext () {toast. maketext (this, "Enter the test content! ", 0 ). show ();} elsetext. settext (edit. gettext () ;}@ overridepublic Boolean onsearchrequested () {return false ;}@ overridepublic Boolean onoptionsitemselected (menuitem item) {Switch (item. getitemid () {Case android. r. id. home: alertdialog. builder dialog = new alertdialog. builder (this); dialog. settitle ("exit "). seticon (Android. r. drawable. btn_star ). setmessage ("quit the program now? "). Setpositivebutton ("OK", new onclicklistener () {@ overridepublic void onclick (dialoginterface dialog, int which) {copyfreeactivity. this. finish ();}}). setnegativebutton ("cancel", new onclicklistener () {@ overridepublic void onclick (dialoginterface dialog, int which) {dialog. cancel ();}}). show (); break;} return Super. onoptionsitemselected (item);} private void initui () {text = (textview) findviewbyid (R. id. text ); Edit = (edittext) findviewbyid (R. id. edit); text. settransformationmethod (hidereturnstransformationmethod. getinstance (); text. settextisselectable (true); mscaledetector = new scalegesturedetector (this, new myscalelistener (); mgesturedetector = new gesturedetector (this, new gesturedetector. simpleongesturelistener () {}); mgesturedetector. setondoubletaplistener (null); actionbar = getactionbar (); Ctionbar. setdisplayhomeasupenabled (true);} private handler muihandler = new handler () {@ overridepublic void handlemessage (Message MSG) {Switch (MSG. what) {Case zoom_in: zoomin (); text. invalidate (); break; Case zoom_out: zoomout (); text. invalidate (); // After modifying the textview, call this method to refresh the textview. Break; default: Break ;}}; private void zoomin () {mtextsize = mtextsize + the_size_of_per_zoom <= max_zoom_in_size? Mtextsize + the_size_of_per_zoom: max_zoom_in_size; If (mtextsize> = max_zoom_in_size) {mtextsize = max_zoom_in_size;} text. settextsize (typedvalue. complex_unit_px, mtextsize);} private void zoomout () {mtextsize = mtextsize-the_size_of_per_zoom <max_zoom_out_size? Max_zoom_out_size: mtextsize-the_size_of_per_zoom; If (mtextsize <= max_zoom_out_size) {mtextsize = max_zoom_out_size;} text. settextsize (typedvalue. complex_unit_px, mtextsize);} private class myscalelistener extendsscalegesturedetector. simpleonscalegesturelistener {@ overridepublic Boolean onscale (scalegesturedetector detector) {float scale = detector. getscalefactor (); If (scale <0.999999 | scale> 1.00001) {mscalefactor = scale;} return true ;}@ overridepublic Boolean onscalebegin (scalegesturedetector detector) {return true ;} @ overridepublic void onscaleend (scalegesturedetector detector) {float scale = detector. getscalefactor (); If (mscalefactor> 1.0) {mzoommsg = zoom_in;} else if (mscalefactor <1.0) {mzoommsg = zoom_out ;}} public Boolean onintercepttouchevent (motionevent eV) {mscaledetector. ontouchevent (EV); Final int action = eV. getaction (); Switch (Action) {Case motionevent. action_down: mgesturedetector. ontouchevent (EV); Return false; Case motionevent. action_move: mgesturedetector. ontouchevent (EV); Return false; Case motionevent. action_up: mgesturedetector. ontouchevent (EV); message MSG = message. obtain (); MSG. what = mzoommsg; muihandler. sendmessage (MSG); mzoommsg =-1; return false;} return true;} public Boolean ontouchevent (motionevent eV) {mscaledetector. ontouchevent (EV); Final int action = eV. getaction (); Switch (Action) {Case motionevent. action_down: mgesturedetector. ontouchevent (EV); Return true; Case motionevent. action_move: mgesturedetector. ontouchevent (EV); Return true; Case motionevent. action_up: mgesturedetector. ontouchevent (EV); message MSG = message. obtain (); MSG. what = mzoommsg; muihandler. sendmessage (MSG); mzoommsg =-1; return true; Case motionevent. action_cancel: mgesturedetector. ontouchevent (EV); Return true; default: If (mgesturedetector. ontouchevent (EV) {return true;} return true ;}@overrideprotected void ondestroy () {super. ondestroy (); muihandler. removecallbacksandmessages (null );}}