我是使用 andengine 的 android 游戏开发的新手。我正在尝试创建一个由静态树和可以在某些控件的帮助下移动和控制的玩家组成的场景。我创建了一个正在移动的播放器，也可以用一些控制器控制，但是现在当我添加一个静态树时，它会出错。
这是代码和 logcat 错误：
package se.treplex.sketchytruck;
import javax.microedition.khronos.opengles.GL10;
import org.anddev.andengine.engine.Engine;
import org.anddev.andengine.engine.camera.Camera;
import org.anddev.andengine.engine.camera.hud.controls.AnalogOnScreenControl;
import org.anddev.andengine.engine.camera.hud.controls.BaseOnScreenControl;
import org.anddev.andengine.engine.camera.hud.controls.AnalogOnScreenControl.IAnalogOnScreenControlListener;
import org.anddev.andengine.engine.handler.physics.PhysicsHandler;
import org.anddev.andengine.engine.options.EngineOptions;
import org.anddev.andengine.engine.options.EngineOptions.ScreenOrientation;
import org.anddev.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.anddev.andengine.entity.modifier.ScaleModifier;
import org.anddev.andengine.entity.modifier.SequenceEntityModifier;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.entity.scene.background.ColorBackground;
import org.anddev.andengine.entity.sprite.Sprite;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory;
import org.anddev.andengine.opengl.texture.region.TextureRegion;
import android.widget.Toast;
public class demo1 extends BaseExample{
private static final int CAMERA_WIDTH = 600;
private static final int CAMERA_HEIGHT = 800;
// ===========================================================
// Fields
// ===========================================================
private Camera mCamera;
private BitmapTextureAtlas mBitmapTextureAtlas;
private TextureRegion mFaceTextureRegion;
private BitmapTextureAtlas mOnScreenControlTexture,treeatlas;
private TextureRegion mOnScreenControlBaseTextureRegion,treergn;
private TextureRegion mOnScreenControlKnobTextureRegion;
// ===========================================================
// Constructors
// ===========================================================
// ===========================================================
// Getter & Setter
// ===========================================================
// ===========================================================
// Methods for/from SuperClass/Interfaces
// ===========================================================
@Override
public Engine onLoadEngine() {
Toast.makeText(this, "Also try tapping this AnalogOnScreenControl!",
Toast.LENGTH_LONG).show();
this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
return new Engine(new EngineOptions(true, ScreenOrientation.PORTRAIT,
new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT),
this.mCamera));
}
@Override
public void onLoadResources() {
BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");
this.mBitmapTextureAtlas = new BitmapTextureAtlas(32, 32,
TextureOptions.BILINEAR_PREMULTIPLYALPHA);
this.mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory
.createFromAsset(this.mBitmapTextureAtlas, this,
"face.png", 0, 0);
this.mOnScreenControlTexture = new BitmapTextureAtlas(256, 128,
TextureOptions.BILINEAR_PREMULTIPLYALPHA);
this.mOnScreenControlBaseTextureRegion = BitmapTextureAtlasTextureRegionFactory
.createFromAsset(this.mOnScreenControlTexture, this,
"onscreen_control_base.png", 0, 0);
this.mOnScreenControlKnobTextureRegion = BitmapTextureAtlasTextureRegionFactory
.createFromAsset(this.mOnScreenControlTexture, this,
"onscreen_control_knob.png", 128, 0);
this.mEngine.getTextureManager().loadTextures(this.mBitmapTextureAtlas,
this.mOnScreenControlTexture);
//for tree
this.treeatlas = new BitmapTextureAtlas(1024, 1024,
TextureOptions.BILINEAR_PREMULTIPLYALPHA);
this.treergn = BitmapTextureAtlasTextureRegionFactory
.createFromAsset(this.mOnScreenControlTexture, this,
"gfx/treedemo.png", 0, 0);
this.mEngine.getTextureManager().loadTexture(treeatlas);
}
@Override
public Scene onLoadScene() {
this.mEngine.registerUpdateHandler(new FPSLogger());
final Scene scene = new Scene();
scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));
//for tree
final Sprite treesprt = new Sprite(10, 0,
this.mFaceTextureRegion);
scene.attachChild(treesprt);
final int centerX = (CAMERA_WIDTH - this.mFaceTextureRegion.getWidth()) / 2;
final int centerY = (CAMERA_HEIGHT - this.mFaceTextureRegion
.getHeight()) / 2;
final Sprite face = new Sprite(centerX, centerY,
this.mFaceTextureRegion);
final PhysicsHandler physicsHandler = new PhysicsHandler(face);
face.registerUpdateHandler(physicsHandler);
scene.attachChild(face);
final AnalogOnScreenControl analogOnScreenControl = new AnalogOnScreenControl(
0, CAMERA_HEIGHT
- this.mOnScreenControlBaseTextureRegion.getHeight(),
this.mCamera, this.mOnScreenControlBaseTextureRegion,
this.mOnScreenControlKnobTextureRegion, 0.1f, 200,
new IAnalogOnScreenControlListener() {
@Override
public void onControlChange(
final BaseOnScreenControl pBaseOnScreenControl,
final float pValueX, final float pValueY) {
physicsHandler
.setVelocity(pValueX * 100, pValueY * 100);
}
@Override
public void onControlClick(
final AnalogOnScreenControl pAnalogOnScreenControl) {
face.registerEntityModifier(new SequenceEntityModifier(
new ScaleModifier(0.25f, 1, 1.5f),
new ScaleModifier(0.25f, 1.5f, 1)));
}
});
analogOnScreenControl.getControlBase().setBlendFunction(
GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
analogOnScreenControl.getControlBase().setAlpha(0.5f);
analogOnScreenControl.getControlBase().setScaleCenter(0, 128);
analogOnScreenControl.getControlBase().setScale(1.25f);
analogOnScreenControl.getControlKnob().setScale(1.25f);
analogOnScreenControl.refreshControlKnobPosition();
scene.setChildScene(analogOnScreenControl);
return scene;
}
@Override
public void onLoadComplete() {
}
}
日志猫：
03-20 14:40:42.343: E/AndEngine(25980): Failed loading Bitmap in AssetBitmapTextureAtlasSource. AssetPath: gfx/face.png
03-20 14:40:42.343: E/AndEngine(25980): java.io.FileNotFoundException: gfx/face.png
03-20 14:40:42.343: E/AndEngine(25980): at android.content.res.AssetManager.openAsset(Native Method)
03-20 14:40:42.343: E/AndEngine(25980): at android.content.res.AssetManager.open(AssetManager.java:314)
03-20 14:40:42.343: E/AndEngine(25980): at android.content.res.AssetManager.open(AssetManager.java:288)
03-20 14:40:42.343: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.source.AssetBitmapTextureAtlasSource.<init>(AssetBitmapTextureAtlasSource.java:55)
03-20 14:40:42.343: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.source.AssetBitmapTextureAtlasSource.<init>(AssetBitmapTextureAtlasSource.java:42)
03-20 14:40:42.343: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory.createFromAsset(BitmapTextureAtlasTextureRegionFactory.java:75)
03-20 14:40:42.343: E/AndEngine(25980): at se.treplex.sketchytruck.demo1.onLoadResources(demo1.java:73)
03-20 14:40:42.343: E/AndEngine(25980): at org.anddev.andengine.ui.activity.BaseGameActivity.doResume(BaseGameActivity.java:168)
03-20 14:40:42.343: E/AndEngine(25980): at org.anddev.andengine.ui.activity.BaseGameActivity.onWindowFocusChanged(BaseGameActivity.java:85)
03-20 14:40:42.343: E/AndEngine(25980): at com.android.internal.policy.impl.PhoneWindow$DecorView.onWindowFocusChanged(PhoneWindow.java:2103)
03-20 14:40:42.343: E/AndEngine(25980): at android.view.View.dispatchWindowFocusChanged(View.java:3924)
03-20 14:40:42.343: E/AndEngine(25980): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:659)
03-20 14:40:42.343: E/AndEngine(25980): at android.view.ViewRoot.handleMessage(ViewRoot.java:1991)
03-20 14:40:42.343: E/AndEngine(25980): at android.os.Handler.dispatchMessage(Handler.java:99)
03-20 14:40:42.343: E/AndEngine(25980): at android.os.Looper.loop(Looper.java:130)
03-20 14:40:42.343: E/AndEngine(25980): at android.app.ActivityThread.main(ActivityThread.java:3687)
03-20 14:40:42.343: E/AndEngine(25980): at java.lang.reflect.Method.invokeNative(Native Method)
03-20 14:40:42.343: E/AndEngine(25980): at java.lang.reflect.Method.invoke(Method.java:507)
03-20 14:40:42.343: E/AndEngine(25980): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
03-20 14:40:42.343: E/AndEngine(25980): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
03-20 14:40:42.343: E/AndEngine(25980): at dalvik.system.NativeStart.main(Native Method)
03-20 14:40:42.367: E/AndEngine(25980): Failed loading Bitmap in AssetBitmapTextureAtlasSource. AssetPath: gfx/gfx/treedemo.png
03-20 14:40:42.367: E/AndEngine(25980): java.io.FileNotFoundException: gfx/gfx/treedemo.png
03-20 14:40:42.367: E/AndEngine(25980): at android.content.res.AssetManager.openAsset(Native Method)
03-20 14:40:42.367: E/AndEngine(25980): at android.content.res.AssetManager.open(AssetManager.java:314)
03-20 14:40:42.367: E/AndEngine(25980): at android.content.res.AssetManager.open(AssetManager.java:288)
03-20 14:40:42.367: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.source.AssetBitmapTextureAtlasSource.<init>(AssetBitmapTextureAtlasSource.java:55)
03-20 14:40:42.367: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.source.AssetBitmapTextureAtlasSource.<init>(AssetBitmapTextureAtlasSource.java:42)
03-20 14:40:42.367: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory.createFromAsset(BitmapTextureAtlasTextureRegionFactory.java:75)
03-20 14:40:42.367: E/AndEngine(25980): at se.treplex.sketchytruck.demo1.onLoadResources(demo1.java:94)
03-20 14:40:42.367: E/AndEngine(25980): at org.anddev.andengine.ui.activity.BaseGameActivity.doResume(BaseGameActivity.java:168)
03-20 14:40:42.367: E/AndEngine(25980): at org.anddev.andengine.ui.activity.BaseGameActivity.onWindowFocusChanged(BaseGameActivity.java:85)
03-20 14:40:42.367: E/AndEngine(25980): at com.android.internal.policy.impl.PhoneWindow$DecorView.onWindowFocusChanged(PhoneWindow.java:2103)
03-20 14:40:42.367: E/AndEngine(25980): at android.view.View.dispatchWindowFocusChanged(View.java:3924)
03-20 14:40:42.367: E/AndEngine(25980): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:659)
03-20 14:40:42.367: E/AndEngine(25980): at android.view.ViewRoot.handleMessage(ViewRoot.java:1991)
03-20 14:40:42.367: E/AndEngine(25980): at android.os.Handler.dispatchMessage(Handler.java:99)
03-20 14:40:42.367: E/AndEngine(25980): at android.os.Looper.loop(Looper.java:130)
03-20 14:40:42.367: E/AndEngine(25980): at android.app.ActivityThread.main(ActivityThread.java:3687)
03-20 14:40:42.367: E/AndEngine(25980): at java.lang.reflect.Method.invokeNative(Native Method)
03-20 14:40:42.367: E/AndEngine(25980): at java.lang.reflect.Method.invoke(Method.java:507)
03-20 14:40:42.367: E/AndEngine(25980): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
03-20 14:40:42.367: E/AndEngine(25980): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
03-20 14:40:42.367: E/AndEngine(25980): at dalvik.system.NativeStart.main(Native Method)
03-20 14:40:42.687: D/libEGL(25980): loaded /system/lib/egl/libGLES_hgl.so
03-20 14:40:42.757: E/(25980): Creating OpenGL 1.1 Session
03-20 14:40:42.796: D/BRCM_EGL(25980): eglCreateContext() context: 0x1b7618, VC context 1, Thread 26006
03-20 14:40:42.796: D/BRCM_EGL(25980): eglCreateWindowSurface() surface: 0x1dfcd0, VC surface: 1, Thread: 26006
03-20 14:40:42.796: D/BRCM_EGL(25980): eglMakeCurrent(0x1b7618, 0x1dfcd0, 0x1dfcd0) Thread: 26006
03-20 14:40:42.828: D/AndEngine(25980): onSurfaceCreated
03-20 14:40:42.851: D/AndEngine(25980): RENDERER: VideoCore IV HW
03-20 14:40:42.851: D/AndEngine(25980): VERSION: OpenGL ES-CM 1.1
03-20 14:40:42.851: D/AndEngine(25980): EXTENSIONS: GL_OES_compressed_ETC1_RGB8_texture GL_OES_compressed_paletted_texture GL_OES_texture_npot GL_OES_EGL_image GL_EXT_discard_framebuffer GL_OES_query_matrix GL_OES_framebuffer_object GL_OES_rgb8_rgba8 GL_OES_depth24 GL_OES_depth32 GL_OES_stencil8 GL_OES_draw_texture
03-20 14:40:42.851: D/AndEngine(25980): EXTENSIONS_VERXTEXBUFFEROBJECTS = true
03-20 14:40:42.859: D/AndEngine(25980): EXTENSIONS_DRAWTEXTURE = true
03-20 14:40:42.859: D/AndEngine(25980): onSurfaceChanged: pWidth=240 pHeight=320
03-20 14:40:42.882: E/AndEngine(25980): Failed loading Bitmap in AssetBitmapTextureAtlasSource. AssetPath: gfx/face.png
03-20 14:40:42.882: E/AndEngine(25980): java.io.FileNotFoundException: gfx/face.png
03-20 14:40:42.882: E/AndEngine(25980): at android.content.res.AssetManager.openAsset(Native Method)
03-20 14:40:42.882: E/AndEngine(25980): at android.content.res.AssetManager.open(AssetManager.java:314)
03-20 14:40:42.882: E/AndEngine(25980): at android.content.res.AssetManager.open(AssetManager.java:288)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.source.AssetBitmapTextureAtlasSource.onLoadBitmap(AssetBitmapTextureAtlasSource.java:105)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas.writeTextureToHardware(BitmapTextureAtlas.java:156)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.Texture.loadToHardware(Texture.java:116)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.TextureManager.updateTextures(TextureManager.java:146)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.engine.Engine.onDrawFrame(Engine.java:503)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.opengl.view.RenderSurfaceView$Renderer.onDrawFrame(RenderSurfaceView.java:154)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.opengl.view.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:617)
03-20 14:40:42.882: E/AndEngine(25980): at org.anddev.andengine.opengl.view.GLSurfaceView$GLThread.run(GLSurfaceView.java:549)
03-20 14:40:42.890: E/AndEngine(25980): Error loading: AssetBitmapTextureAtlasSource(gfx/face.png)
03-20 14:40:42.890: E/AndEngine(25980): java.lang.IllegalArgumentException: AssetBitmapTextureAtlasSource: AssetBitmapTextureAtlasSource(gfx/face.png) returned a null Bitmap.
03-20 14:40:42.890: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas.writeTextureToHardware(BitmapTextureAtlas.java:159)
03-20 14:40:42.890: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.Texture.loadToHardware(Texture.java:116)
03-20 14:40:42.890: E/AndEngine(25980): at org.anddev.andengine.opengl.texture.TextureManager.updateTextures(TextureManager.java:146)
03-20 14:40:42.890: E/AndEngine(25980): at org.anddev.andengine.engine.Engine.onDrawFrame(Engine.java:503)
03-20 14:40:42.890: E/AndEngine(25980): at org.anddev.andengine.opengl.view.RenderSurfaceView$Renderer.onDrawFrame(RenderSurfaceView.java:154)
03-20 14:40:42.890: E/AndEngine(25980): at org.anddev.andengine.opengl.view.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:617)
03-20 14:40:42.890: E/AndEngine(25980): at org.anddev.andengine.opengl.view.GLSurfaceView$GLThread.run(GLSurfaceView.java:549)
03-20 14:40:42.890: W/dalvikvm(25980): threadid=10: thread exiting with uncaught exception (group=0x40018578)
03-20 14:40:42.914: E/AndroidRuntime(25980): FATAL EXCEPTION: GLThread
03-20 14:40:42.914: E/AndroidRuntime(25980): java.lang.IllegalArgumentException: AssetBitmapTextureAtlasSource: AssetBitmapTextureAtlasSource(gfx/face.png) returned a null Bitmap.
03-20 14:40:42.914: E/AndroidRuntime(25980): at org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas.writeTextureToHardware(BitmapTextureAtlas.java:159)
03-20 14:40:42.914: E/AndroidRuntime(25980): at org.anddev.andengine.opengl.texture.Texture.loadToHardware(Texture.java:116)
03-20 14:40:42.914: E/AndroidRuntime(25980): at org.anddev.andengine.opengl.texture.TextureManager.updateTextures(TextureManager.java:146)
03-20 14:40:42.914: E/AndroidRuntime(25980): at org.anddev.andengine.engine.Engine.onDrawFrame(Engine.java:503)
03-20 14:40:42.914: E/AndroidRuntime(25980): at org.anddev.andengine.opengl.view.RenderSurfaceView$Renderer.onDrawFrame(RenderSurfaceView.java:154)
03-20 14:40:42.914: E/AndroidRuntime(25980): at org.anddev.andengine.opengl.view.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:617)
03-20 14:40:42.914: E/AndroidRuntime(25980): at org.anddev.andengine.opengl.view.GLSurfaceView$GLThread.run(GLSurfaceView.java:549)
03-20 14:40:43.046: D/dalvikvm(25980): GC_CONCURRENT freed 297K, 49% free 2927K/5639K, external 417K/517K, paused 3ms+4ms