这是我的logCat。
04-09 09:11:18.178: E/AndroidRuntime(829): FATAL EXCEPTION: main
04-09 09:11:18.178: E/AndroidRuntime(829): java.lang.NullPointerException
04-09 09:11:18.178: E/AndroidRuntime(829): at com.example.androidresim.Activitygiris.onLoadScene(Activitygiris.java:84)
04-09 09:11:18.178: E/AndroidRuntime(829): at org.anddev.andengine.ui.activity.BaseGameActivity.doResume(BaseGameActivity.java:158)
04-09 09:11:18.178: E/AndroidRuntime(829): at org.anddev.andengine.ui.activity.BaseGameActivity.onWindowFocusChanged(BaseGameActivity.java:82)
04-09 09:11:18.178: E/AndroidRuntime(829): at com.android.internal.policy.impl.PhoneWindow$DecorView.onWindowFocusChanged(PhoneWindow.java:2462)
04-09 09:11:18.178: E/AndroidRuntime(829): at android.view.View.dispatchWindowFocusChanged(View.java:7578)
04-09 09:11:18.178: E/AndroidRuntime(829): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:962)
04-09 09:11:18.178: E/AndroidRuntime(829): at android.view.ViewRootImpl$ViewRootHandler.handleMessage(ViewRootImpl.java:3115)
04-09 09:11:18.178: E/AndroidRuntime(829): at android.os.Handler.dispatchMessage(Handler.java:99)
04-09 09:11:18.178: E/AndroidRuntime(829): at android.os.Looper.loop(Looper.java:137)
04-09 09:11:18.178: E/AndroidRuntime(829): at android.app.ActivityThread.main(ActivityThread.java:5103)
04-09 09:11:18.178: E/AndroidRuntime(829): at java.lang.reflect.Method.invokeNative(Native Method)
04-09 09:11:18.178: E/AndroidRuntime(829): at java.lang.reflect.Method.invoke(Method.java:525)
04-09 09:11:18.178: E/AndroidRuntime(829): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
04-09 09:11:18.178: E/AndroidRuntime(829): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-09 09:11:18.178: E/AndroidRuntime(829): at dalvik.system.NativeStart.main(Native Method)
这是我的班级。
public class Activitygiris extends BaseGameActivity {
private static final int CAMERA_WIDTH=800;
private static final int CAMERA_HEIGHT=480;
private Camera camera;
private Engine engine;
Scene sahne;
private Texture texSaha,texOyuncu1,texOyuncu2,texRedWins,texBlueWins;
private TextureRegion texRegSaha,texRegOyuncu1,texRegOyuncu2,texRegRedWins,texRegBlueWins;
private Sprite spriteSaha,spriteOyuncu1,spriteOyuncu2,spriteRedWins,spriteBlueWins;
private TimerHandler timerBeklet;
@Override
public Engine onLoadEngine() {
// TODO Auto-generated method stub
camera= new Camera(0,0,CAMERA_WIDTH,CAMERA_HEIGHT);
final EngineOptions engineoptions = new EngineOptions(true,ScreenOrientation.LANDSCAPE,new FillResolutionPolicy(),camera);
engineoptions.getTouchOptions().setRunOnUpdateThread(true);
engine = new Engine(engineoptions);
return engine;
}
@Override
public void onLoadResources() {
// TODO Auto-generated method stub
texSaha=new Texture(1024,512,TextureOptions.BILINEAR_PREMULTIPLYALPHA);
texOyuncu1 = new Texture(128,128,TextureOptions.BILINEAR_PREMULTIPLYALPHA);
texOyuncu2 = new Texture(128,128,TextureOptions.BILINEAR_PREMULTIPLYALPHA);
texRedWins = new Texture(64,256,TextureOptions.BILINEAR_PREMULTIPLYALPHA);
texBlueWins = new Texture(64,256,TextureOptions.BILINEAR_PREMULTIPLYALPHA);
texRegSaha = TextureRegionFactory.createFromAsset(texSaha, this, "gfx/Arkaplan.jpg",0,0);
texRegOyuncu1 = TextureRegionFactory.createFromAsset(texOyuncu1, this, "gfx/kol1.png",0,0);
texRegOyuncu2 = TextureRegionFactory.createFromAsset(texOyuncu2, this, "gfx/kol2.png",0,0);
texRegBlueWins = TextureRegionFactory.createFromAsset(texBlueWins, this, "gfx/bluewins.png",0,0);
texRegRedWins = TextureRegionFactory.createFromAsset(texRedWins, this, "gfx/redwins.png",0,0);
Texture [] textures = {texSaha,texOyuncu1,texOyuncu2,texBlueWins,texRedWins };
mEngine.getTextureManager().loadTextures(textures);
}
@Override
public Scene onLoadScene() {
// TODO Auto-generated method stub
this.engine.registerUpdateHandler(new FPSLogger());
this.sahne=new Scene();
spriteSaha = new Sprite(0, 0, texRegSaha);
spriteOyuncu1 = new Sprite(600, CAMERA_HEIGHT/2-64, texRegOyuncu1);
spriteOyuncu2 = new Sprite(50, CAMERA_HEIGHT/2-64, texRegOyuncu2);
spriteRedWins = new Sprite(CAMERA_HEIGHT-128,CAMERA_HEIGHT/2-128,texRegRedWins);
spriteRedWins = new Sprite(CAMERA_HEIGHT+32,CAMERA_HEIGHT/2-128,texRegBlueWins.clone());
spriteBlueWins.setVisible(false);
mEngine.registerUpdateHandler(timerBeklet = new TimerHandler(3, false,new ITimerCallback() {
@Override
public void onTimePassed(TimerHandler pTimerHandler) {
// TODO Auto-generated method stub
spriteRedWins.setRotation(180);
mEngine.registerUpdateHandler(timerBeklet= new TimerHandler(3,false, new ITimerCallback() {
@Override
public void onTimePassed(TimerHandler pTimerHandler) {
// TODO Auto-generated method stub
spriteBlueWins.setVisible(true);
spriteRedWins.setVisible(false);
}
}));
}
}));
this.sahne.attachChild(spriteSaha);
this.sahne.attachChild(spriteOyuncu1);
this.sahne.attachChild(spriteOyuncu2);
this.sahne.attachChild(spriteBlueWins);
this.sahne.attachChild(spriteRedWins);
return this.sahne;
}
@Override
public void onLoadComplete() {
// TODO Auto-generated method stub
}
}
请帮帮我..
答案 0 :(得分：1)
您获得nullPointerException，因为引用变量spriteBlueWin引用了null。
您没有初始化spriteBlueWins，您应该像对待其他人一样初始化它。
正如@Dirk Lachowski指出的那样，您可能复制并粘贴了spriteRedWins并忘记将其替换为spriteBlueWins：
spriteSaha = new Sprite(0, 0, texRegSaha);
spriteOyuncu1 = new Sprite(600, CAMERA_HEIGHT/2-64, texRegOyuncu1);
spriteOyuncu2 = new Sprite(50, CAMERA_HEIGHT/2-64, texRegOyuncu2);
spriteRedWins = new Sprite(CAMERA_HEIGHT-128,CAMERA_HEIGHT/2-128,texRegRedWins);
spriteRedWins = new Sprite(CAMERA_HEIGHT+32,CAMERA_HEIGHT/2-128,texRegBlueWins.clone());
最后一行应该是：
spriteBlueWins = new Sprite(CAMERA_HEIGHT+32,CAMERA_HEIGHT/2-128,texRegBlueWins.clone());