java - Libgdx Android 双触摸板问题

Question

我目前在使用两个触摸板时遇到问题，当使用“弹出”模式时，时不时会发生错误的触摸板被注册为触摸的情况。这意味着当我使用左侧触摸板时，有时会在触摸右侧触摸板时将其拾取，因此右侧触摸板的旋钮会移动到触摸板区域的最左侧。这种情况主要发生在两个手指“几乎”同时触摸屏幕时。我猜测我的代码中可能有错误，但我没有看到它。此外，此问题似乎仅在一个或两个触摸板处于 POPUP/INVISIBLE 模式时才会出现，因此这很可能是问题所在。

这是我程序的更新方法:

// MOVEMENT TOUCHPAD
switch(movementMode) {
case STATIC:
    if(movementTouchpad.getKnobPercentX() != 0 || movementTouchpad.getKnobPercentY() != 0)
        moveCamera();
    break;
case POPUP:
case INVISIBLE:
    if(Gdx.input.justTouched() && !movementTouchpad.isTouched()) {
        // To prevent unwanted relocation of the touchpad
        screenPosition.set(-1, -1);

        // Store the position if the left half is touched
        for(int i = 0; i < 10; i++) {
            if(Gdx.input.isTouched(i)) {
                if(Gdx.input.getX(i) < (screenWidth / 2.0f)) {
                    screenPosition.set(Gdx.input.getX(i), Gdx.input.getY(i));
                    break;
                }                               
            }
        }

        // See if the touchpad needs to be repositioned
        if((screenPosition.x != -1) &&
        (screenPosition.x > (touchpadWidth / 2)) && 
        (screenPosition.x < ((screenWidth / 2) - (touchpadWidth / 2))) &&
        (screenPosition.y > (touchpadHeight / 2)) && 
        (screenPosition.y < (screenHeight - (touchpadHeight / 2)))) {
            // Reposition the movement touchpad
            movementTouchpad.setX(screenPosition.x - (touchpadWidth / 2));
            movementTouchpad.setY((screenHeight - screenPosition.y) - (touchpadHeight / 2));
            // Fire a fake touch event
            stagePosition = movementStage.screenToStageCoordinates(screenPosition);
            fakeTouchDownEvent.setStageX(stagePosition.x);
            fakeTouchDownEvent.setStageY(stagePosition.y);
            movementTouchpad.fire(fakeTouchDownEvent);
        }
        // Give feedback when touched too close to the border
        else if(screenPosition.x != -1) {
            switch(feedbackMode) {
            case NONE:
                break;
            case SOUND:
                //TODO
                break;
            case TACTILE:
                Gdx.input.vibrate(VIBRATION_DURATION);
                break;
            case VISUAL:
                //TODO
                break;
            }
        }
    }
    if(movementTouchpad.getKnobPercentX() != 0 || movementTouchpad.getKnobPercentY() != 0)
        moveCamera();
    break;
}

// ROTATION TOUCHPAD
switch(rotationMode) { 
case STATIC:
    if(rotationTouchpad.getKnobPercentX() != 0 || rotationTouchpad.getKnobPercentY() != 0)
        rotateCamera();
    break;
case POPUP:
case INVISIBLE:
    if(Gdx.input.justTouched() && !rotationTouchpad.isTouched()) {
        // To prevent unwanted relocation of the touchpad
        screenPosition.set(-1, -1);

        // Store the position if the right half is touched
        for(int i = 0; i < 10; i++) {
            if(Gdx.input.isTouched(i)) {
                if(Gdx.input.getX(i) > (screenWidth / 2.0f)) {
                    screenPosition.set(Gdx.input.getX(i), Gdx.input.getY(i));
                    break;
                }                               
            }
        }

        // See if the touchpad needs to be repositioned
        if((screenPosition.x != -1) &&
        (screenPosition.x > ((touchpadWidth / 2) + (screenWidth / 2))) && 
        (screenPosition.x < (screenWidth - (touchpadWidth / 2))) &&
        (screenPosition.y > (touchpadHeight / 2)) && 
        (screenPosition.y < (screenHeight - (touchpadHeight / 2)))) {
            // Reposition the rotation touchpad
            rotationTouchpad.setX(screenPosition.x - (touchpadWidth / 2));
            rotationTouchpad.setY((screenHeight - screenPosition.y) - (touchpadHeight / 2));
            // Fire a fake touch event
            stagePosition = movementStage.screenToStageCoordinates(screenPosition);
            fakeTouchDownEvent.setStageX(stagePosition.x);
            fakeTouchDownEvent.setStageY(stagePosition.y);
            rotationTouchpad.fire(fakeTouchDownEvent);                      
        }
        // Give feedback when touched too close to the border
        else if(screenPosition.x != -1) {
            switch(feedbackMode) {
            case NONE:
                break;
            case SOUND:
                //TODO
                break;
            case TACTILE:
                Gdx.input.vibrate(VIBRATION_DURATION);
                break;
            case VISUAL:
                //TODO
                break;
            }
        }
    }
    if(rotationTouchpad.getKnobPercentX() != 0 || rotationTouchpad.getKnobPercentY() != 0)
        rotateCamera();
    break;
}

任何帮助将不胜感激

Answer 1

这可能是因为您的手机可能完全支持多点触控，它可能只能进行触摸缩放，这种情况以前发生在我身上，因为我有 HTC 愿望，看看这个 video看看这是否是同一个问题。获取一个触摸屏应用程序，看看是否有相同的效果。