Don't know if this will help
I picked it up ages ago from Stack Overflow - I think it was Java originall
but it seems to work
Only trouble is if you have some objects on screen then swiping across then
doesnt work - I probably need to make the gesture listener more
sophisticated.
So put in your own gesture listener class thus
public class GestureListener : Java.Lang.Object,
GestureDetector.IOnGestureListener
{
private readonly View view;
private Context cntxt;
private TabHost TH;
private EditText dpf;
private static int SWIPE_MAX_OFF_PATH = 270;
private static int SWIPE_MIN_DISTANCE = 50;
private static int SWIPE_THRESHOLD_VELOCITY = 30;
public GestureListener(View view, Context Cntxt, int currtab,
TabHost th,EditText dpfield)
{
this.view = view;
this.cntxt = Cntxt;
this.TH = th;
this.dpf = dpfield;
}
//public IntPtr Handle
// public IntPtr Handle
// {
// get { throw new NotImplementedException(); }
// }
public bool OnDown(MotionEvent e)
{
// Toast.MakeText(cntxt, "down swipe",
ToastLength.Short).Show();
// view.Text = "- DOWN -";
return true;
}
public bool OnFling(MotionEvent e1, MotionEvent e2, float
velocityX, float velocityY)
{
try
{
if (System.Math.Abs(e1.GetY() - e2.GetY()) >
SWIPE_MAX_OFF_PATH)
return false;
// right to left swipe
if (e1.GetX() - e2.GetX() > SWIPE_MIN_DISTANCE &&
System.Math.Abs(velocityX) > SWIPE_THRESHOLD_VELOCITY)
{
// Toast.MakeText(view.Context, "Left Swipe",
ToastLength.Short).Show();
if (TH.CurrentTab == 3)
{ TH.SetCurrentTabByTag("pax");
return true; }
if (TH.CurrentTab == 4)
{
TH.CurrentTab = 0;
}
else
{
TH.CurrentTab = TH.CurrentTab + 1;
dpf.Selected = true;
}
return true;
//TabHost.CurrentTab=1;
}
else if (e2.GetX() - e1.GetX() > SWIPE_MIN_DISTANCE &&
System.Math.Abs(velocityX) > SWIPE_THRESHOLD_VELOCITY)
//Toast.MakeText(view.Context, "Right Swipe",
ToastLength.Short).Show();
if (TH.CurrentTab == 0)
{
TH.CurrentTab = 4;
}
else
{
TH.CurrentTab = TH.CurrentTab - 1;
dpf.Selected = true;
}
}
catch (System.Exception e)
{
Toast.MakeText(view.Context, "" + e.ToString(),
ToastLength.Long).Show();
// nothing
}
return false;
}
public void OnLongPress(MotionEvent e)
{
// Toast.MakeText(cntxt, "Long press",
ToastLength.Short).Show();
//view.Text = "- LONG PRESS -";
}
public bool OnScroll(MotionEvent e1, MotionEvent e2, float
distanceX, float distanceY)
{
// Toast.MakeText(cntxt, "this si a fling or scroll",
ToastLength.Short).Show();
//view.Text = "- FLING -";
return true;
}
public void OnShowPress(MotionEvent e)
{
// Toast.MakeText(cntxt, "a show pres?",
ToastLength.Short).Show();
//view.Text = "- SHOW PRESS -";
}
public bool OnSingleTapUp(MotionEvent e)
{
//view.Text = "- SINGLE TAP UP -";
// Toast.MakeText(cntxt, "single up tap",
ToastLength.Short).Show();
return true;
}
}
//=======================end of gesture listener stuff
Then put an instance of Gesture detector and listener - In my app these are
at the top of Activity1
private GestureDetector gestureScannerA;
private GestureListener gestureListenerA;
Instatiate them in your oncreate
gestureListenerA = new GestureListener(TabHost, this, 0, this.TabHost,
this.depfield);
gestureScannerA = new GestureDetector(this, gestureListenerA);
Now you need to override the OnTouch event - put this code in after your
oncreate method
public override bool OnTouchEvent(MotionEvent e)
{
try
{
return gestureScannerA.OnTouchEvent(e);
}
catch (System.Exception eee)
{
Toast.MakeText(this, "Error \n" + eee.Message,
ToastLength.Long).Show();
return gestureScannerA.OnTouchEvent(e);
}
}
================
And that should be it - though I've almost certainly forgotten something
Be interested for any comments on how one deals with a swipe across other
objects on the view
All the best
John Murray
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of EricW
Sent: 01 October 2012 9:15 PM
To: [email protected]
Subject: [mono-android] how to add swipe?
Hi,
I building an app with two activities. The first one is for login.
After login the second activity is started.
On this activity I have 3 tablelayouts in a ViewFlipper.
On the first tablelayout the user can do a search. On the other layouts the
results are shown.
I would like the user to be able to switch layouts by swiping.
I have read many forums, blogs and articles, but I can't get anything to
work.
I need a good example in C# that will work in MonoDevelop.
Please help.
rg,
Eric
--
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http://mono-for-android.1047100.n5.nabble.com/how-to-add-swipe-tp5712038.htm
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