如何使用 Espresso 执行多点触控滑动？

Question

如何使用 Espresso 执行多点触控滑动？例如两指向右滑动。

Answer 1

正如@Daniel 建议的那样，我创建了一个自定义版本的 MotionEvents，因为当使用多个手指时，您必须注入 ACTION_POINTER_DOWN/UP 而不是 ACTION_DOWN/UP。 我创建了一个双指版本的 LinearSwipe，如下所示：

private static Swiper.Status sendLinearSwipe(UiController uiController,
                                             float[] startCoordinates,
                                             float[] startCoordinatesSecondFinger,
                                             float[] endCoordinates,
                                             float[]endCoordinatesSecondFinger,
                                             float[] precision,
                                             float[] precisionSecond,
                                             int duration) {
    checkNotNull(uiController);
    checkNotNull(startCoordinates);
    checkNotNull(startCoordinatesSecondFinger);
    checkNotNull(endCoordinates);
    checkNotNull(endCoordinatesSecondFinger);
    checkNotNull(precision);
    checkNotNull(precisionSecond);

    float[][] steps = interpolate(startCoordinates, endCoordinates, SWIPE_EVENT_COUNT);
    float[][] stepsSecondFinger = interpolate(startCoordinatesSecondFinger, endCoordinatesSecondFinger, SWIPE_EVENT_COUNT);
    final int delayBetweenMovements = duration / steps.length;
    final int delayBetweenMovementsSecondFinger = duration / stepsSecondFinger.length;

    int maxLength=Math.min(steps.length, stepsSecondFinger.length);

    MotionEvent downEvent;
    downEvent = MotionEvents.sendDown(uiController, steps[0], precision,true).down;
    MotionEvent downEventSecondFinger;
    downEventSecondFinger = MotionEvents.sendDown(uiController,stepsSecondFinger[0], precisionSecond,false).down;

    try {
        for (int i = 1; i < maxLength; i++) {

            if (sendMovement(uiController, steps[i], downEvent)) return Status.FAILURE;
            if (sendMovement(uiController, stepsSecondFinger[i], downEventSecondFinger)) return Status.FAILURE;


            long desiredTime = downEvent.getDownTime() + delayBetweenMovements * i;
            long desiredTimeSecondFinger = downEventSecondFinger.getDownTime() + delayBetweenMovementsSecondFinger * i;

            long timeUntilDesired = desiredTime - SystemClock.uptimeMillis();
            long timeUntilDesiredSecondFinger = desiredTimeSecondFinger - SystemClock.uptimeMillis();
            loopMainThread(uiController, timeUntilDesired);
            loopMainThread(uiController, timeUntilDesiredSecondFinger);

        }

        if (!MotionEvents.sendUp(uiController, downEventSecondFinger, endCoordinatesSecondFinger,false)) {
            Log.e(TAG, "Injection of up event as part of the swipe failed. Sending cancel event.");
            MotionEvents.sendCancel(uiController, downEventSecondFinger);
            return Swiper.Status.FAILURE;
        }
    } finally {
        downEvent.recycle();
        downEventSecondFinger.recycle();
    }
    return Swiper.Status.SUCCESS;
}

private static void loopMainThread(UiController uiController, long timeUntilDesired) {
    if (timeUntilDesired > 10) {
        uiController.loopMainThreadForAtLeast(timeUntilDesired);
    }
}

private static boolean sendMovement(UiController uiController, float[] step, MotionEvent downEvent) {
    if (!MotionEvents.sendMovement(uiController, downEvent, step)) {
        Log.e(TAG, "Injection of move event as part of the swipe failed. Sending cancel event.");
        MotionEvents.sendCancel(uiController, downEvent);
        return true;
    }
    return false;
}

现在完美运行！谢谢@丹尼尔

Answer 2

Espresso 不提供该功能，但您可以自己完成

• 注入两个向下事件
• 注入几对运动事件，每个手指一个
• 注入两个向上事件

Espresso 有一些实用程序可以让您更轻松地进行操作。特别是，MotionEvents 类有一些帮助方法来创建和注入这些低级事件。

您可能需要参考sendLinearSwipe 代码，其中包含单点触摸滑动的大部分逻辑。

如果您将其写为ViewAction，它将完全适合 Espresso 框架（例如，您可以轻松地让它等待空闲资源）。