Develop Reference

Android : hide/show footer/header as scrolling scrollview down/up

I am trying to implement a way to have my footer slide away down and my header to slide away up while user scrolls down the scrollview.
And vice-versa, as the user scrolls up the scollview, I want my footer to slide in from the bottom and the header slide in form the top.
Regarding the animation, I have found this good library https://github.com/daimajia/AndroidViewAnimations that comes with a lot of nice animations.
The closest example for what I am looking for, is the default Android Twitter application that makes it's footer disappear as the user scrolls his timeline down and makes it reappear as the user scrolls up.
By header, I am not talking about the Android Toolbar (op AppBar or whatever). It's a customed-made UI element that I want to animate while the user scrolls.
Same thing goes for the footer : it's a customed-made UI element.
While looking for solutions, I stumble upon this answer https://stackoverflow.com/a/28712465/3535408 but it does not work.
Indeed, placing a Log.d inside the ifand else if shows that a simple touch with my finger triggers both a MotionEvent.ACTION_DOWN and a MotionEvent.ACTION_UP event. The same applies as I am sliding my finger up/down making the scrollview scrolls up/down : both events are triggered at the end when I stop touching the scrollview.
Is there a way to improve this solution ? Because as of now, as both MotionEvents are triggered, both animations are also triggered so the result is quite horrible.
Thanks !

An easy way to achieve that would be the following:
place the listview, the header and the footer inside a RelativeLayout
align the header with parent's top
align the footer with parent's bottom
add an empty header and footer to the listview with the same heights
catch the scrolling events on your listview and change the footer and/or header's translationY accordingly
But to answer your question, I'd say you should try a GestureDetector. It's way easier to manage the events - Detecting Gestures

Android Horizontal Scrolling that Snaps to List Items

I'd like to implement a UI experience in Android where a user can view a single item (for example, an item in my case is a collection of texts), and swipe left or right on the item to go to the previous or next item.
From my research, ListView does not implement horizontal scrolling. Potential candidates seem to be HorizontalScrollView and GridView, but I haven't seen any examples that can do this simply - only seemingly complicated libraries that need to be included.
My question is, is there a way to use ListView, HorizontalScrollView, GridView, or a combination of them to implement a horizontal scroll that shows one item at a time and snaps to the item being displayed?
The highlighted area in the picture below shows where I'm trying to implement this logic.

It looks like the best option to achieve this experience is a ViewPager, which requires the android support library.
http://developer.android.com/reference/android/support/v4/view/ViewPager.html

Android: i need to do a menu like the image

i'm developing an application for android that is already done for IOS, is not big problem.
the thing is that my boss want it to be exactly the same, but one of the menus is the problem, is like a slide menu but with zoom and a background image, anyone have any idea how can i do this, i already google it but no results :(, a library would help.
here is a picture with the menu for IOS.

I don't think if it would be an effective solution but you can use a RelativeLayout.
Put the selection part behind in a LinearLayout then put a framelayout front to contain list fragments. This way you shouldn't use an action bar to have absolutely same looking with iOs version.
When someone clicks open button apply an animation to your framelayout. scale it by %75 and move it 25% in y coordinate and move it %50 in x coordinate. When buttons in your LinearLayout apply a reverse animation to your FrameLayout. If swap button clicked change your fragment with new one. You can also aply a transaction animation to your fragments.
I hope you know how to handle this stuff. If no I can do my best to code an example.
EDIT:
Don't forget to set your flame layout unclickable when you move it to right side.

https://github.com/SpecialCyCi/AndroidResideMenu
I think I found your answer. I came across this in a list of libraries it is 3.8 on the list https://github.com/Trinea/android-open-project/tree/master/English%20Version
Cheers!

Android : Sliding Left and Right functionality for playing previous and next songs

I have to implement slide left and right now playing bar in order to play previous and next song.I have to make whole now playing bar movable after left and right slide.
I have tried implementing ViewPager but due to that I lost Sliding UP functionality of that Playing bar.I have huge code with me.So by making minimum changes in the layouts how can I implement swipe left and right functionality.

Have you checked google music it is doing exactly the same what you are asking for with drawer enabled and viewpager need to used in this case.
Swapping will only do the swapping of the fragment not the whole page..
May it helps you :)

Listview that expands when we zoom inside in android

I have tried different examples searching different sites for expandable list view...
I had been successful in making an Expandable Listview....but it expands only when click on to it groups and button...i may require it like when i drag my two fingers in v shape model...it opens inside view....like in iphone map...when we zoom with two fingers it zoomins... any suggestions??
..........................................................................................................

You can try to detect finger gestures on your listview and if it matches the pinch zoom gesture, then you will make the listview expand its groups. Take a look at this for a tutorial on understanding and using finger gestures in android.