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1、java端 Cocos2dxGLSurfaceView类@Override	public boolean onTouchEvent(final MotionEvent pMotionEvent) {		// these data are used in ACTION_MOVE and ACTION_CANCEL **		//触摸点的个数,也可以理解为多少个手指点击屏幕		final int pointerNumber = pMotionEvent.getPointerCount(); 		final int[] ids = new int[pointerNumber];		final float[] xs = new float[pointerNumber];		final float[] ys = new float[pointerNumber];		for (int i = 0; i < pointerNumber; i++) {			//每个手指都会分配一个唯一的ID，第一个id为0，依次累加1, 2..			//只要手指没有离开屏幕，那么在移动过程中，这个ID不变，都是唯一的			//所以我们可以根据这个ID来判断手指，而且每个手指移动，都有响应的			//x,y坐标，不同手指之间的坐标无关			ids[i] = pMotionEvent.getPointerId(i); 			xs[i] = pMotionEvent.getX(i);			ys[i] = pMotionEvent.getY(i);		}		switch (pMotionEvent.getAction() & MotionEvent.ACTION_MASK) {		        //跟多点触控有关，只有当手指个数大于1个时，才会触发，每增加一个手指			//就会多执行一次，每多一个手指，都没分配一个唯一的ID（idPointerDown）			//因为第二个手指也会触发类似于第一个手指的点击动作，所以即使处理			//单点点击事件，也需要考虑第二个手指的点击动作。			case MotionEvent.ACTION_POINTER_DOWN:				final int indexPointerDown = pMotionEvent.getAction() >> MotionEvent.ACTION_POINTER_ID_SHIFT;				final int idPointerDown = pMotionEvent.getPointerId(indexPointerDown);				final float xPointerDown = pMotionEvent.getX(indexPointerDown);				final float yPointerDown = pMotionEvent.getY(indexPointerDown);				this.queueEvent(new Runnable() {					@Override					public void run() {						Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionDown(idPointerDown, xPointerDown, yPointerDown);					}				});				break;			case MotionEvent.ACTION_DOWN:	//单点触控				// there are only one finger on the screen				//单点触控，也可以理解为，第一个手指触摸屏幕时会触发这个事件，				//如果第二个手指点击屏幕，则不会触发这个事件，第二个手指即后面的				//会触发ACTION_POINTER_DOWN事件				final int idDown = pMotionEvent.getPointerId(0);				final float xDown = xs[0];				final float yDown = ys[0];				this.queueEvent(new Runnable() {					@Override					public void run() {						Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionDown(idDown, xDown, yDown);					}				});				break;			case MotionEvent.ACTION_MOVE:				//手指在屏幕上移动时，（由于屏幕很灵敏，即使点击也会伴随着触发这个动作）				//会触发这个事件，handleActionMove函数会把所有手指的移动事件,都传递给C++端				this.queueEvent(new Runnable() {					@Override					public void run() {						Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionMove(ids, xs, ys);					}				});				break;			case MotionEvent.ACTION_POINTER_UP:				final int indexPointUp = pMotionEvent.getAction() >> MotionEvent.ACTION_POINTER_ID_SHIFT;				final int idPointerUp = pMotionEvent.getPointerId(indexPointUp);				final float xPointerUp = pMotionEvent.getX(indexPointUp);				final float yPointerUp = pMotionEvent.getY(indexPointUp);				this.queueEvent(new Runnable() {					@Override					public void run() {						Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionUp(idPointerUp, xPointerUp, yPointerUp);					}				});				break;			case MotionEvent.ACTION_UP:				// there are only one finger on the screen				//第一个手指离开屏幕会触发这个事件，如果有第二个手指，				//也离开屏幕，则会触发ACTION_POINTER_UP事件				final int idUp = pMotionEvent.getPointerId(0);				final float xUp = xs[0];				final float yUp = ys[0];				this.queueEvent(new Runnable() {					@Override					public void run() {						Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionUp(idUp, xUp, yUp);					}				});				break;			case MotionEvent.ACTION_CANCEL:				this.queueEvent(new Runnable() {					@Override					public void run() {						Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionCancel(ids, xs, ys);					}				});				break;		}        /*		if (BuildConfig.DEBUG) {			Cocos2dxGLSurfaceView.dumpMotionEvent(pMotionEvent);		}		*/		return true;	}-->>调用相应的jni方法：	public void handleActionDown(final int pID, final float pX, final float pY) {		Cocos2dxRenderer.nativeTouchesBegin(pID, pX, pY);	}	public void handleActionUp(final int pID, final float pX, final float pY) {		Cocos2dxRenderer.nativeTouchesEnd(pID, pX, pY);	}	public void handleActionCancel(final int[] pIDs, final float[] pXs, final float[] pYs) {		Cocos2dxRenderer.nativeTouchesCancel(pIDs, pXs, pYs);	}	public void handleActionMove(final int[] pIDs, final float[] pXs, final float[] pYs) {		Cocos2dxRenderer.nativeTouchesMove(pIDs, pXs, pYs);	}2、C++中：TouchesJni.cpp文件    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeTouchesBegin(JNIEnv * env, jobject thiz, jint id, jfloat x, jfloat y) {        cocos2d::CCDirector::sharedDirector()->getOpenGLView()->handleTouchesBegin(1, &id, &x, &y);    }    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeTouchesEnd(JNIEnv * env, jobject thiz, jint id, jfloat x, jfloat y) {        cocos2d::CCDirector::sharedDirector()->getOpenGLView()->handleTouchesEnd(1, &id, &x, &y);    }    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeTouchesMove(JNIEnv * env, jobject thiz, jintArray ids, jfloatArray xs, jfloatArray ys) {        int size = env->GetArrayLength(ids);        jint id[size];        jfloat x[size];        jfloat y[size];        env->GetIntArrayRegion(ids, 0, size, id);        env->GetFloatArrayRegion(xs, 0, size, x);        env->GetFloatArrayRegion(ys, 0, size, y);        cocos2d::CCDirector::sharedDirector()->getOpenGLView()->handleTouchesMove(size, id, x, y);    }    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeTouchesCancel(JNIEnv * env, jobject thiz, jintArray ids, jfloatArray xs, jfloatArray ys) {        int size = env->GetArrayLength(ids);        jint id[size];        jfloat x[size];        jfloat y[size];        env->GetIntArrayRegion(ids, 0, size, id);        env->GetFloatArrayRegion(xs, 0, size, x);        env->GetFloatArrayRegion(ys, 0, size, y);        cocos2d::CCDirector::sharedDirector()->getOpenGLView()->handleTouchesCancel(size, id, x, y);    }    总结：手指ACTION_POINTER_DOWN和ACTION_DOWN事件一次只会触发一个，不会同时出现。    看cocos2d::CCDirector::sharedDirector()->getOpenGLView()->handleTouchesBegin(1, &id, &x, &y)    第一个参数表示num，始终为1.

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