android - Black screen on running the code -


i'm trying understand sprites in andengine. wrote below code load simple image "img" 

package com.example.pxc;  import org.andengine.engine.camera.camera; import org.andengine.engine.options.engineoptions; import org.andengine.engine.options.screenorientation; import org.andengine.engine.options.resolutionpolicy.ratioresolutionpolicy; import org.andengine.entity.scene.scene; import org.andengine.entity.sprite.sprite; import org.andengine.opengl.texture.atlas.bitmap.bitmaptextureatlas; import org.andengine.opengl.texture.atlas.bitmap.bitmaptextureatlastextureregionfactory; import org.andengine.opengl.texture.atlas.bitmap.buildablebitmaptextureatlas; import org.andengine.opengl.texture.atlas.bitmap.source.ibitmaptextureatlassource; import org.andengine.opengl.texture.atlas.buildable.builder.blackpawntextureatlasbuilder; import org.andengine.opengl.texture.atlas.buildable.builder.itextureatlasbuilder.textureatlasbuilderexception; import org.andengine.opengl.texture.region.itextureregion; import org.andengine.ui.activity.simplebasegameactivity;  public class testactivity extends simplebasegameactivity {      static final int camera_width = 800;     static final int camera_height = 480;     buildablebitmaptextureatlas bbta;     itextureregion msr;     @override     public engineoptions oncreateengineoptions() {         camera mcamera = new camera(0, 0, camera_width, camera_height);         return new engineoptions(true, screenorientation.landscape_fixed,             new ratioresolutionpolicy(camera_width, camera_height), mcamera);     }      @override     protected void oncreateresources() {         // todo auto-generated method stub         bitmaptextureatlastextureregionfactory.setassetbasepath("gfx/");          bbta = new buildablebitmaptextureatlas(mengine.gettexturemanager(), 256, 256);           msr=bitmaptextureatlastextureregionfactory.createfromasset(bbta, this, "img.png");         try{         bbta.build(new blackpawntextureatlasbuilder<ibitmaptextureatlassource, bitmaptextureatlas>(0, 1, 1));         bbta.load();                  } catch (textureatlasbuilderexception e) {                 e.printstacktrace();                 }            }      @override     protected scene oncreatescene() {         scene scene = new scene();         sprite msprite = new sprite(0, 0,                 msr, mengine.getvertexbufferobjectmanager());         scene.attachchild(msprite);         return scene;     } }

the above code compiles without errors. when run code, see black screen on emulator instead of image. why happens? , how can resolve problem?

if want run on emulator first have provide settings shown in this link if want effective 1 fps following link may you


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