Develop Reference

Android Code for change activity when swipe left/right

i am very new in the world of programming.And also my English is very weak. But i want to know the code for this. I created a project for Math (AP,GP,HP) series. Now i want to set-up this like Whatsapp have Calls,Chats,Contacts.What should i do? Also Whatsapp has a white line under Calls/Chats/Contacts.that code for it?

http://www.androidhive.info/2013/10/android-tab-layout-with-swipeable-views-1/
use this link ,it will help you to make tabs, and after that take one relative layout and take one textview in that. I hope that will help !!!

Another activity comes up and covers half the screen size

I have a button which on clicking opens another activity which comes up from below and covers half the screen. I searched about it but did not get any useful approach except the overridePendingTransition function which is useful in getting the animation on activity transition, but this didn't solve my problem. I know this is done in google hangout as shown in the images but can't find any useful solution.
When we press the button this activity comes up and covers half the screen size
when we scroll up the activity becomes our main activity
Any idea how this can be done?
Thanks

you can use bottom sheet for this type of UI.
here is first sample.
another sample
here is code

After some searching i got exactly what i wanted with all the codes, but still the profile picture animation is remaining, rest the SlidingPanelLayout code can be seen here . It contains some detailed information with all the classes implemented which you can use directly. I think this will surely help you. :D
Edit: As said by #MrsEd i would like to add some code that helped me. This is the custom built DraggableLayout which you can use directly, the code can be found here. Then the activity must implement the onStopVerticalDragDown() of the DraggableLayoutCallbackListener inteface and set the content view as this xml file.
Hope this clears all the doubt and makes it easier for anyone to implement their own custom built DraggableLayout without using any third party library. :D

Please. Don't redo this.
And instead, use Flipboard's BottomSheet.

How do replicate this android pop up

Can anyone tell me what control or how do you create the pop-up effect used in these images to display the legend?
The screenshots are taken from an app called FlyOKC.
Any help is greatly appreciated, thank you.

This is not exactly a custom dialog. But, yes it is still a customized view. And it is more or less called Quick Action Dialog in android. I would suggest you to follow the tutorials below for generating an exactly same popover (or even better) with Android. Check the screenshot also.
http://www.londatiga.net/it/how-to-create-quickaction-dialog-in-android/
http://www.androidpatterns.com/uap_pattern/quick-actions (Pattern Reference)

That's certainly using a custom version of a dialog. The idea is to implement your layout in a xml and inflate it in a dialog. There's a lot of tutorials around, try that one.

Actually, that can be achieved by using RelativeLayout and switching the legend view's visible state between View.VISIBLE and View.GONE in button's click handler.
To get the exact animation you'll need to jump some hoops.
Here are related threads:
How does one Animate Layout properties of ViewGroups?
How do I animate View.setVisibility(GONE)
Also, I think another (and possibly easier) way would be to use Fragments API with transition effects, in which case this is the thread to read:
Animate the transition between fragments

Help with android layout

I want to create a UI similar to the images shown in the links given below.
http://www.4shared.com/photo/EU1KsEPC/device1.html
http://www.4shared.com/photo/tcQMx75T/device2.html
The requirement is, when I swipe to the right, it should go to the 2nd, 3rd pages and so on. And swiping to the left should go to the previous page.
How can I create such a UI? What layout should I use?
Any help in this regard would be well appreciated with points.
Best Regards,
Rony

I think you should look into a GridView.
http://developer.android.com/guide/tutorials/views/hello-gridview.html
http://developer.android.com/resources/tutorials/views/index.html
Perhaps your looking for this answer?
Implementing Swipe action on ViewFlipper with multiple GridViews

Swipe among activities in android

i have 4 activities in which i have to swipe them right, left and if i am in last activity and swipe to the left then again first activity should be shown.
can anybody have any idea how i can achieve this? or some sample code?
thanks a lot.

you can achieve it by animaton..
But it will show as a Gallery view and you can swipe as well...
OnTouchEvent on every activity you can call another activity using intents by
overridePendingTransition(R.anim.act_back_slide_enter, R.anim.act_back_slide_leave);
//overridePendingTransition("animation for activity which enters", "animation for activity which leaves");
I have not yet tried this... but we can make it in this form.. If you get success let me know.

#sajjoo Here goes your answer in deezapps widget with the questions below pointing at it
How to show multiple screens with right/left slide Gesture
How to create a slider screen (As in Tweetdeck) in Android?
and many more linked questions..

I recently posted a question that covers a lot of this (my question is about using Swipe together with ScrollView, the Swipe gesture by itself works just fine):
Swipe/Fling tab-changing in conjunction with ScrollView?
If you read the sources I have listed and use the code I've provided then you should be able to do it.

It's work fine... just must to delete the redundant R.java file...!
http://www.codeshogun.com/blog/2009/04/16/how-to-implement-swipe-action-in-android/