I'm trying to intercept onTouchEvent and use the movement to set the number
of seconds on a simple timer. The idea is that if you touch your finger on
the screen and move left or right, up or down the counter will move higher
or lower. My code works but for some reason the increments are not smooth.
Down movements are short and jerky compared to up movements for example. I'm
having a hard time finding any reason for this. My code follows:
@Override
public boolean onTouchEvent(MotionEvent event) {
Message m = new Message();
m.what = timer.GUIUPDATEIDENTIFIER;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
startX = (int)event.getX();
startY = (int)event.getY();
return true;
case MotionEvent.ACTION_MOVE:
endX = (int)event.getX();
endY = (int)event.getY();
if((endY - startY) < 0) {
this.mySecondsTotal += 1;
} else {
this.mySecondsTotal -= 1;
}
if((endX - startX) < 0) {
this.mySecondsTotal -= 1;
} else {
this.mySecondsTotal += 1;
}
startX = (int)event.getX();
startY = (int)event.getY();
if (this.mySecondsTotal < 0)
this.mySecondsTotal = 0;
DEFAULTSECONDS = this.mySecondsTotal;
this.myYogaViewUpdateHandler.sendMessage(m);
return true;
case MotionEvent.ACTION_UP:
endX = (int)event.getX();
endY = (int)event.getY();
return true;
}
return false;
}
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