Question

我想触发这样的触摸事件：

首先，手指在屏幕的（0,50％）处向下触摸并滑动到屏幕的（50％，50％），然后退出（将手指从屏幕上移开）

我发现了这样的事情：

MotionEvent event = MotionEvent.obtain(downTime, eventTime, action, x, y, pressure, size, metaState, xPrecision, yPrecision, deviceId, edgeFlags);

onTouchEvent(event);

但是，如何模仿上述情况？我需要创建2个活动吗？ onTouchDown，onMove等....？谢谢你的帮助。

Answer 1

// Obtain MotionEvent object
long downTime = SystemClock.uptimeMillis();
long eventTime = SystemClock.uptimeMillis() + 100;
float x = 0.0f;
float y = 0.0f;
// List of meta states found here:     developer.android.com/reference/android/view/KeyEvent.html#getMetaState()
int metaState = 0;
MotionEvent motionEvent = MotionEvent.obtain(
    downTime, 
    eventTime, 
    MotionEvent.ACTION_UP, 
    x, 
    y, 
    metaState
);

// Dispatch touch event to view
view.dispatchTouchEvent(motionEvent);

Answer 2

这是干净的版本：

public void TouchView(View view)
{
    view.DispatchTouchEvent(MotionEvent.Obtain(SystemClock.UptimeMillis(), SystemClock.UptimeMillis(), (int)MotionEventActions.Down, 0, 0, 0));
    view.DispatchTouchEvent(MotionEvent.Obtain(SystemClock.UptimeMillis(), SystemClock.UptimeMillis(), (int)MotionEventActions.Up, 0, 0, 0));
}

PS：这是一个xamarin android解决方案，但是您可以轻松地针对Java对其进行修改

Answer 3

要添加到上面@ bstar55的出色答案中-如果您想要创建一个“轻击”事件（例如，用户点击视图），则需要模拟用户触摸屏幕然后移除他们的屏幕手指在短时间内。

为此，您需要“分派” ACTION_DOWN MotionEvent，然后在短时间后紧跟ACTION_UP MotionEvent。

以下示例在Kotlin中经过测试并可靠地工作：

   //Create amd send a tap event at the current target loctaion to the PhotoView
   //From testing (on an original Google Pixel) a tap event needs an ACTION_DOWN followed shortly afterwards by
   //an ACTION_UP, so send both events
   //First, create amd send the ACTION_DOWN MotionEvent
   var originalDownTime: Long = SystemClock.uptimeMillis()
   var eventTime: Long = SystemClock.uptimeMillis() + 100
   var x = your_X_Value
   var y = your_Y_Value 
   var metaState = 0
   var motionEvent = MotionEvent.obtain(
           originalDownTime,
           eventTime,
           MotionEvent.ACTION_DOWN,
           x,
           y,
           metaState
    )
    var returnVal = yourView.dispatchTouchEvent(motionEvent)
    Log.d(TAG,"rteurnVal: " + returnVal)

    //Create amd send the ACTION_UP MotionEvent
    eventTime= SystemClock.uptimeMillis() + 100
    motionEvent = MotionEvent.obtain(
           originalDownTime,
           eventTime,
           MotionEvent.ACTION_UP,
           x,
           y,
           metaState
     )
     returnVal = yourView.dispatchTouchEvent(motionEvent)
     Log.d(TAG,"rteurnVal: " + returnVal)

如何以编程方式触发android中的触摸事件？

3 个答案: