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我正在使用AndEngine并尝试检测游戏中的轻扫手势。在引擎中有一个类（SurfaceGestureDetector.java），但我不知道如何使用它。当我尝试在onCreateScene（）方法中实例化时，它会抛出异常。如果有任何方法或内部类为它提供或任何其他方法来检测andengine中的滑动。这里是我的代码。在引擎中水平和垂直检测轻扫手势
public class AETopDownBackground extends SimpleBaseGameActivity implements IOnSceneTouchListener{
private int CAMERA_WIDTH=800;
private int CAMERA_HEIGHT=480;
private Camera mCamera;
private Scene mScene;
private BuildableBitmapTextureAtlas atlas,txchrAtlas;
private TextureRegion trHill;
//private Sprite mSpriteHill;
private AnimatedSprite mSpriteMan;
private TiledTextureRegion trTiledMan;
@Override
public EngineOptions onCreateEngineOptions() {
// TODO Auto-generated method stub
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/");
atlas= new BuildableBitmapTextureAtlas(getTextureManager(), 800, 1300);
trHill=BitmapTextureAtlasTextureRegionFactory.createFromAsset(atlas, this, "road_bg.png");
try {
atlas.build(new BlackPawnTextureAtlasBuilder<IBitmapTextureAtlasSource, BitmapTextureAtlas>(0, 0, 0));
} catch (TextureAtlasBuilderException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
atlas.load();
txchrAtlas= new BuildableBitmapTextureAtlas(getTextureManager(), 256, 92,TextureOptions.BILINEAR);
trTiledMan= BitmapTextureAtlasTextureRegionFactory.createTiledFromAsset(txchrAtlas, this, "player_forword.png",4, 1);
try {
txchrAtlas.build(new BlackPawnTextureAtlasBuilder<IBitmapTextureAtlasSource, BitmapTextureAtlas>(0, 0, 0));
} catch (TextureAtlasBuilderException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
txchrAtlas.load();
}
@Override
protected Scene onCreateScene() {
// TODO Auto-generated method stub
this.mEngine.registerUpdateHandler(new FPSLogger());
mScene = new Scene();
mScene.setBackground(new Background(Color.CYAN));
mScene.setOnSceneTouchListener(this);
//gdetectorl= new MySurfaceSwipeDetector(getApplicationContext());
//final float textureHeight = trHill.getHeight();
/* Create the hill which will appear to be the furthest
* into the distance. This Sprite will be placed higher than the
* rest in order to retain visibility of it */
Sprite hillFurthest = new Sprite(0, 0, trHill,
mEngine.getVertexBufferObjectManager());
//ParallaxBackground background = new ParallaxBackground(0.3f, 0.3f,0.9f) {
AutoParallaxBackground background = new AutoParallaxBackground(0.3f,0.3f, 0.9f, 50){
/* We'll use these values to calculate the parallax value of the
background */
float cameraPreviousY = 0;
float parallaYValueOffset = 0;
/* onUpdates to the background, we need to calculate new
* parallax values in order to apply movement to the background
* objects (the hills in this case) */
@Override
public void onUpdate(float pSecondsElapsed) {
/* Obtain the camera's current center X value */
final float cameraCurrentY = mCamera.getCenterY();
/* If the camera's position has changed since last
* update... */
if (cameraPreviousY != cameraCurrentY) {//cameraPreviousX != cameraCurrentX
/* Calculate the new parallax value offset by
* subtracting the previous update's camera x coordinate
* from the current update's camera x coordinate */
parallaYValueOffset += cameraCurrentY - cameraPreviousY;
//parallaxValueOffset=parallaxValueOffset+10;
/* Apply the parallax value offset to the background, which
* will in-turn offset the positions of entities attached
* to the background */
this.setParallaxValue(parallaYValueOffset);
System.out.println("Camera parallaxValueOffset:"+parallaYValueOffset);
//this.setParallaxValue(0);
/* Update the previous camera X since we're finished with
this
* update */
cameraPreviousY = cameraCurrentY;
}
// this.setParallaxValue(2);
super.onUpdate(pSecondsElapsed);
}
};
//negative value in this method indicates movement.To change the direction of movement use (+)positive value
background.attachParallaxEntity(new ParallaxEntity(10,hillFurthest));
/* Set & Enabled the background */
mScene.setBackground(background);
mScene.setBackgroundEnabled(true);
mSpriteMan = new AnimatedSprite(310, 250, trTiledMan, getVertexBufferObjectManager());
mSpriteMan.setScale(3);
mSpriteMan.animate(100);
mScene.attachChild(mSpriteMan);
return mScene;
}
@Override
public boolean onSceneTouchEvent(Scene pScene, TouchEvent pSceneTouchEvent) {
// TODO Auto-generated method stub
if(pSceneTouchEvent.isActionUp()){
//Toast.makeText(this, "touched", Toast.LENGTH_SHORT).show();
mSpriteMan.setPosition(pSceneTouchEvent.getX(), pSceneTouchEvent.getY());
}
return true;
}
} @Override
protected boolean onSwipeLeft() {
// TODO Auto-generated method stub
onSurfaceGesture("test");
return true;
}
@Override
protected boolean onSwipeDown() {
// TODO Auto-generated method stub
onSurfaceGesture("test");
return true;
}
@Override
protected boolean onSingleTap() {
// TODO Auto-generated method stub
onSurfaceGesture("test");
return true;
}
@Override
protected boolean onDoubleTap() {
// TODO Auto-generated method stub
onSurfaceGesture("test");
return true;
}
};
this.mSGDA.setEnabled(true);
return mScene;
}
@Override
public boolean onSceneTouchEvent(Scene pScene, TouchEvent pSceneTouchEvent) {
// TODO Auto-generated method stub
if(pSceneTouchEvent.isActionUp()){
//Toast.makeText(this, "touched", Toast.LENGTH_SHORT).show();
//mSpriteMan.setPosition(pSceneTouchEvent.getX(), pSceneTouchEvent.getY());
}
return true;
}
private void onSurfaceGesture(final String str){
try {
Looper.prepare();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new Handler().post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
System.out.println("Action is :"+str);
}
});
}
我试过下面的链接，但不知道如何在我的活动中使用它.http：//stackoverflow.com/questions/17105657/swipe-scenes-in-andengine – puneetbhardwaj