如何使用 Espresso 执行多点触控滑动?
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【中文标题】如何使用 Espresso 执行多点触控滑动?【英文标题】:How can I perform a multi touch swipe with Espresso? 【发布时间】:2015-03-13 13:45:28 【问题描述】:例如两指向右滑动。
【问题讨论】:
【参考方案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
【讨论】:
能否在示例中也包含 interpolate 方法?【参考方案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)。
【讨论】:
谢谢,我现在可以使用它了。但是,当我注入两个向上事件时它会失败。但是,如果我只注入一个向上事件,它就可以正常工作:)以上是关于如何使用 Espresso 执行多点触控滑动?的主要内容,如果未能解决你的问题,请参考以下文章
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