Android ViewPager setOnTouchListener

Question

I have a ViewPager component, and inside the fragment, there is a WebView component, I want to detect user's tap on screen, and at the same time, user can swipe also.

Currently I am settings the onTouchListener on ViewPager like this: vPager.setOnTouchListener(new View.OnTouchListener() { float oldX = 0, newX = 0, sens = 5;

 @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: oldX = event.getX(); break; case MotionEvent.ACTION_UP: newX = event.getX(); if (Math.abs(oldX - newX) < sens) { tap(); return true; } oldX = 0; newX = 0; break; } return false; } });

I find the listener is triggered only when I swipe left and right, when I swipe up and down, it's not triggered. I am swiping on the WebView component, and it has long content which need scroll.

MariusBudin · Accepted Answer · 2013-09-21 09:18:18Z

1

You're looking only for the X, up and down moves on the Y axis

answered Sep 21, 2013 at 9:18

MariusBudin

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5 Comments

John Over a year ago

no, I add debug point at the entry of onTouch method, its only got triggered when I swipe left and right.

MariusBudin Over a year ago

Then the webview gets the event, try implementing it's onTouchListener and see if it gets the event, if so, move the listener as a variable and assign both views to it

MariusBudin Over a year ago

because of the pager, it's only interested in the left-right swipes to show next-previous fragment, it's not interested in the up/down.It's pretty much how the android desktop works too, only far more restrictive there, when you swipe left-right you go to the screen and the widgets can only implement up-down gestures and tap

John Over a year ago

but you know, I can add listener to WebView, but the webView is inside Fragment, I cannot pass the event to ViewPager...

MariusBudin Over a year ago

Then try to implement an observer pattern and pass the events to the pager

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