Android: How to create a MotionEvent?

You should use one of the static obtain methods of the MotionEvent class to create a new event.

The simplest way (besides wrapping a new event from an existing one) is:

static public MotionEvent obtain(long downTime, long eventTime, int action,
        float x, float y, int metaState) {

API Docs:

Create a new MotionEvent, filling in a subset of the basic motion values. Those not specified here are: device id (always 0), pressure and size (always 1), x and y precision (always 1), and edgeFlags (always 0).

Parameters:

downTime The time (in ms) when the user originally pressed down to start a stream of position events. This must be obtained from SystemClock.uptimeMillis().
eventTime The the time (in ms) when this specific event was generated. This must be obtained from SystemClock.uptimeMillis().
action The kind of action being performed -- one of either ACTION_DOWN, ACTION_MOVE, ACTION_UP, or ACTION_CANCEL.
x The X coordinate of this event.
y The Y coordinate of this event.
metaState The state of any meta / modifier keys that were in effect when the event was generated.

Link to API Docs

Supplemental answer

Here is an example illustrating the accepted answer:

// get the coordinates of the view
int[] coordinates = new int[2];
myView.getLocationOnScreen(coordinates);

// MotionEvent parameters
long downTime = SystemClock.uptimeMillis();
long eventTime = SystemClock.uptimeMillis();
int action = MotionEvent.ACTION_DOWN;
int x = coordinates[0];
int y = coordinates[1];
int metaState = 0;

// dispatch the event
MotionEvent event = MotionEvent.obtain(downTime, eventTime, action, x, y, metaState);
myView.dispatchTouchEvent(event);