如何使用Espresso执行多点触摸刷卡？

Question

如何使用Espresso执行多点触摸刷卡？例如用两根手指向右滑动。

Answer 1

由于@Daniel建议，我创建MotionEvents的定制版本，因为使用多个手指时，你必须注入ACTION_POINTER_DOWN/UP，而不是ACTION_DOWN/UP。 我创建LinearSwipe的twoFinger版本，像这样：

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，它完美的作品！由于@Daniel

Answer 2

咖啡不提供该功能，但你可以通过

• 注射两降事件
• 注入几双运动事件，每一个手指
• 注入两个上事件做自己

意式浓缩咖啡有一些实用工具可以使它更容易。特别是，MotionEvents类有一些辅助方法来创建和注入这些低级事件。

您可能要参考sendLinearSwipe代码包含大部分逻辑的单点触摸刷卡。

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