Java BeginContact未被执行

我试图检测动态物体和静态物体之间的碰撞。我编写的代码执行时没有任何错误，但没有检测到冲突。动力体是可移动的。当它接触到物理世界中的其他实体时，不会检测到碰撞。这是我的密码：

public class MainActivity extends BaseGameActivity implements ContactListener {
    Body body, bodyr1, bodyr2, bodyr3;
    PhysicsWorld pw;

    @Override
    public void onCreateScene(OnCreateSceneCallback pOnCreateSceneCallback)
        throws Exception {
        scene = new Scene();
        final float centerX = (CAMERA_WIDTH - back.getWidth()) / 2;
        final float centerY = (CAMERA_HEIGHT - this.back.getHeight()) / 2;

        Sprite backgr = new Sprite(centerX, centerY, back,
            this.getVertexBufferObjectManager());
        Sprite rcs1 = new Sprite(85, 250, rc1,
            this.getVertexBufferObjectManager());
        Sprite rcs2 = new Sprite(195, 240, rc2,
            this.getVertexBufferObjectManager());
        Sprite rcs3 = new Sprite(295, 250, rc3,
            this.getVertexBufferObjectManager());

        ans = new AnimatedSprite(86, 245, ttr,
            this.getVertexBufferObjectManager()) {
                @Override
                protected void onManagedUpdate(float pSecondsElapsed) {
                    this.setPosition(pX, pY);
                    super.onManagedUpdate(pSecondsElapsed);
                }
            };

        this.mPhysicsHandler = new PhysicsHandler(ans);
        pw = new PhysicsWorld(new Vector2(0, SensorManager.GRAVITY_EARTH),
            false);
        final FixtureDef objectFixtureDef = PhysicsFactory.createFixtureDef(2f,0f, 0.9f);
        body = PhysicsFactory.createBoxBody(pw, ans, BodyType.DynamicBody,
            objectFixtureDef);
        bodyr1 = PhysicsFactory.createBoxBody(pw, rcs1, BodyType.StaticBody,
            objectFixtureDef);
        bodyr2 = PhysicsFactory.createBoxBody(pw, rcs2, BodyType.StaticBody,
            objectFixtureDef);
        bodyr3 = PhysicsFactory.createBoxBody(pw, rcs3, BodyType.StaticBody,
            objectFixtureDef);

        pw.registerPhysicsConnector(new PhysicsConnector(ans, body, true, true));

        scene.attachChild(backgr);
        scene.attachChild(rcs1);
        scene.attachChild(rcs2);
        scene.attachChild(rcs3);
        scene.attachChild(ans);
        body.setUserData("player");
        bodyr2.setUserData("3");
        pw.setContactListener(this);
        scene.registerUpdateHandler(this.mPhysicsHandler);
        pOnCreateSceneCallback.onCreateSceneFinished(scene);
    }

    @Override
    public void beginContact(Contact contact) {
        // Fixture x1= contact.getFixtureA();
        // Fixture x2=contact.getFixtureB();
        Log.i("Contacted","asdasdads");
    }

    @Override
    public void endContact(Contact contact) {
        // TODO Auto-generated method stub
    }

    @Override
    public void preSolve(Contact contact, Manifold oldManifold) {
        // TODO Auto-generated method stub
    }

    @Override
    public void postSolve(Contact contact, ContactImpulse impulse) {
        // TODO Auto-generated method stub
    }
}

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为什么没有检测到碰撞？请帮助

我在您的班级中找不到联系人侦听器。我认为您必须添加以下链接：

mPhysicsWorld.setContactListener(MainActivity.this);

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希望我的帖子能帮助你谢谢你的帮助兄弟但是你的建议不起作用。我修改了这一行场景；使碰撞起作用