Scale and expand the image when you click andengine.

1. The cream object to be used for image scaling is of the smoothcamera type. That is, camera = new
Smoothcamera (0, 0, camera_width, camera_height, 0, 0, 0.1f)

2. Place the image in a folder (raw). The image type can be PVR or bin extension. In OpenGL, fragments consume less memory resources.

There are three demos in andengine. The following code is used directly,

I:

Package org. andengine. examples;
Import java. Io. ioexception; import java. Io. inputstream;
Import Org. andengine. engine. camera. camera; import Org. andengine. engine. camera. smoothcamera; import Org. andengine. engine. options. engineoptions; import Org. andengine. engine. options. screenorientation; import Org. andengine. engine. options. resolutionpolicy. ratioresolutionpolicy; import Org. andengine. entity. scene. ionscenetouchlistener; import Org. andengine. entity. scene. scene; import Org. andengine. entity. scene. background. background; import Org. andengine. entity. sprite. sprite; import Org. andengine. entity. util. fpslogger; import Org. andengine. examples. ADT. zoomstate; import Org. andengine. input. touch. touchevent; import Org. andengine. openGL. texture. itexture; import Org. andengine. openGL. texture. textureoptions; import Org. andengine. openGL. texture. compressed. PVR. pvrgztexture; import Org. andengine. openGL. texture. compressed. PVR. pvrtexture. pvrtextureformat; import Org. andengine. openGL. texture. region. itextureregion; import Org. andengine. openGL. texture. region. textureregionfactory; import Org. andengine. UI. activity. simplebasegameactivity; import Org. andengine. util. debug. debug;
Import Android. widget. Toast;
/*** (C) 2010 Nicolas gramlich * (c) 2011 Zynga ** @ author Nicolas gramlich * @ since 13:54:51-13.07.2011 */public class pvrgztextureexample extends simplebasegameactivity {// ======== ========================================================== ====/constants // ========================================== ======================================
Private Static final int camera_width = 720; Private Static final int camera_height = 480;
// ================================================ ====================================/// Fields // ====================== ========================================================== =====
Private itexture mtexture; private itextureregion mhousetextureregion;
Private zoomstate mzoomstate = zoomstate. None;
// ================================================ ====================================/// Constructors // ======================== ========================================================== =====
// ================================================ ==================================/// Getter & setter // ================== ========================================================== ========
// ================================================ ====================================/// Methods for/from superclass/interfaces // ========== ========================================================== ==============
@ Override public engineoptions oncreateengineoptions () {toast. maketext (this, "click the top half of the screen to zoom in or the bottom half to zoom out! ", Toast. length_long );
Final camera = new smoothcamera (0, 0, camera_width, camera_height, 0, 0, 0.1f) {@ override
// Depending on the status value of mzoomstate, determine whether to zoom in or out. The value of this mzoomstate is assigned a public void onupdate (final float implements condselapsed) {Switch (pvrgztextureexample. this. mzoomstate) {case in: This. setzoomfactor (this. getzoomfactor () + 0.1f * parse condselapsed); break; case out: This. setzoomfactor (this. getzoomfactor ()-0.1f * parse condselapsed); break;} super. onupdate (synchronized condselapsed );}};
Return new engineoptions (true, screenorientation. landscape_fixed, new ratioresolutionpolicy (camera_width, camera_height), camera );}
@ Override public void oncreateresources () {try {This. mtexture = new pvrgztexture (this. gettexturemanager (), pvrtextureformat. rgba_8888, textureoptions. bilinear) {@ override protected inputstream ongetinputstream () throws ioexception {
// Read the image file data return pvrgztextureexample. This. getresources (). openrawresource (R. Raw. house_pvrgz_argb_8888) ;}; this. mtexture. Load ();
// Extract the image from the existing texture
This. mhousetextureregion = textureregionfactory. extractfromtexture (this. mtexture, 0, 0,512,512);} catch (final throwable e) {Debug. E (E );}}
@ Override public scene oncreatescene () {This. mengine. registerupdatehandler (New fpslogger ());
Final scene = new scene (); scene. setbackground (new background (0.09804f, 0.6274f, 0.8784f ));
Final float centerx = (camera_width-This. mhousetextureregion. getwidth ()/2; Final float centery = (camera_height-This. mhousetextureregion. getheight ()/2;
Scene. attachchild (New sprite (centerx, centery, this. mhousetextureregion, this. getvertexbufferobjectmanager ()));
// When you touch the screen, the value of mzoomstate is determined based on the touch position.
Scene. setonscenetouchlistener (New ionscenetouchlistener () {@ override public Boolean onscenetouchevent (final scene pscene, final touchevent pscenetouchevent) {If (pscenetouchevent. isactiondown () | pscenetouchevent. isactionmove () {If (pscenetouchevent. gety () <camera_height/2) {pvrgztextureexample. this. mzoomstate = zoomstate. in;} else {pvrgztextureexample. this. mzoomstate = zoomstate. out ;}} else {pvrgztextureexample. this. mzoomstate = zoomstate. none;} return true ;}});
Return scene ;}
// ================================================ ======================================/// Methods // ========================================================== =====
// ================================================ ======================================/Inner and anonymous classes // ================ ========================================================== =======}