So, I have the following body for my onFling() method:
public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, float velocityY) {
try {
// Left swipe
if ( velocityX < -SWIPE_THRESHOLD_VELOCITY) {
if( velocityY < -SWIPE_THRESHOLD_VELOCITY) {
GameWindow.writeToOutput("northwest");
Log.d("Console","Wrote NW");
}
else
GameWindow.writeToOutput("west");
return true;
// Right swipe
} else if (velocityX > SWIPE_THRESHOLD_VELOCITY) {
if( velocityY < -SWIPE_THRESHOLD_VELOCITY) {
GameWindow.writeToOutput("northeast");
Log.d("Console","Wrote NE");
}
else
GameWindow.writeToOutput("east");
return true;
}
if ( velocityY > SWIPE_THRESHOLD_VELOCITY) {
GameWindow.writeToOutput("south");
return true;
}
if ( velocityY < -SWIPE_THRESHOLD_VELOCITY) {
GameWindow.writeToOutput("north");
return true;
}
} catch (Exception e) {
Log.e("YourActivity", "Error on gestures");
}
return false;
}
My issue has been that, I will do an up-left "fling", but the velocities will instead suddenly display in the logcat that I did a "fling" in the opposite direction. Could this be an emulator issue, or is my code not accurately measuring the direction of my gesture?
Ok, Dutt was right and I would like to give him credit for this. I modified my code to measure the gestures a little more accurately and in case anyone would like to use this code, it's below. I'm going to have to modify the sensitivity a little bit since up-left is not going to have as high numbers as a straight up, but this is a really solid starting point.
public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, float velocityY) {
try {
double xDir = e1.getX() - e2.getX();
double yDir = e1.getY() - e2.getY();
Log.d("Console","xVel = " + xDir);
Log.d("Console","yVel = " + yDir);
if ( xDir > SWIPE_THRESHOLD_VELOCITY) {
if( yDir > SWIPE_THRESHOLD_VELOCITY) {
//Up-Left swipe
GameWindow.writeToOutput("northwest");
}
else if ( yDir < -SWIPE_THRESHOLD_VELOCITY){
//Down-Left swipe
GameWindow.writeToOutput("southwest");
}
else{
//Left swipe
GameWindow.writeToOutput("west");
}
return true;
} else if (xDir < -SWIPE_THRESHOLD_VELOCITY) {
if( yDir > SWIPE_THRESHOLD_VELOCITY) {
//Up-Right swipe
GameWindow.writeToOutput("northeast");
}else if ( yDir < -SWIPE_THRESHOLD_VELOCITY){
//Down-Right swipe
GameWindow.writeToOutput("southeast");
}
else {
//Right swipe
GameWindow.writeToOutput("east");
}
return true;
}
if ( yDir < -SWIPE_THRESHOLD_VELOCITY) {
//Down swipe
GameWindow.writeToOutput("south");
return true;
}
if ( yDir > SWIPE_THRESHOLD_VELOCITY) {
//Up swipe
GameWindow.writeToOutput("north");
return true;
}
} catch (Exception e) {
Log.e("YourActivity", "Error on gestures");
}
return false;
}