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Android: Yahoo Weather App Horizontal Scroll-view Effect?

I would like to know what the Android implementation is of this type of scrolling that you see in the Yahoo Weather App. Here is a video example:
http://www.youtube.com/watch?v=a-q_yetkpik
Any examples or ideas on how to implement this would sincerely help this poor lost soul!
Thank you

use that library https://github.com/xgc1986/ParallaxPagerLibrary, it's very easy to use, and it worked for me
demo

You should separate two different things here:
The horizontal scrolling
As you swipe your way through the viewpager, the background moves slower than the content does.
This effect can be achieved with the ParallaxPagerLibrary
The vertical scrolling
As you swipe up, the background image blurs away, making the "swiped up" content more visible to the user. This post explains it all and also provides a library.
But if you want it even better, someone wrote a simple "clone" of this weather app https://github.com/MoshDev/LikeYahooWeather

They customized ViewPager, the widget is called WeatherViewPager that it's unfortunately unavailable, looks like a ViewPager with a sort of parallax
You may take a look at https://play.google.com/store/apps/details?id=com.desarrollodroide.repos
it's a collection of usable opensource libraries
e.g. Utils->Paralloid or Utils->ParallaxScroll

Vertical Drawer on Android

It's there a way to make a vertical slider on Android?, for example, I want the action bar to be dragged all the way from top to bottom, to show a fragment, pretty much like the notification bar on Android.
Thank you very much

There is always a way ;), but it would take some custom code to do it. I don't really have to much time to write something out for you, but I did find something that may be useful to you. These guys open sourced a slide from bottom to top view like is used in Google Play Music. You can take a look and maybe modify it to slide from top to bottom.
https://github.com/umano/AndroidSlidingUpPanel
Good Luck

There used to be a slidingdrawer view as part of the framework but it's now deprecated. There is however a nice implementation of something similar on github that you can take a look at here:
https://github.com/umano/AndroidSlidingUpPanel

Umano's Drawer is dated and limited. You should use a more up-to-date library like https://github.com/drxeno02/androidprojects-book2-slidingdrawer.
This library has no limitations such as only having two children. You can have as many children as you want, and you can set offsets and design your drawer to look anyway you want.

LinearLayout to animate when shown

I have a vertical LinearLayout which has two another vertical layouts inside. The first one is always shown, and the second one depends on some event. I do want to animate that second layout when shown. How can I do it smoothly and nice? Thank you so much,

You should check out this library on Github. It may help. It is an animation library for listviews.
ListViewAnimations

A very simple, yet elegant way to get your layouts animated is by using the android:animateLayoutChanges="true" on its parent. This will likely take a lot of work in getting a nice animation out of your hands, unless you want to customize it.
With KitKat, Google introduced the android.transtion API, which may also be worth looking at.

You can create your own animation and you apply that animation to your layout when you need(In your case at the time of shown your layout)
yourLayout.startAnimation(yourAnimation);

Possible implementation of game screen concept for an android game

I want to develop an android app, but I'm still not that great at using xml or the eclipse wysiwyg editor to make scalable and robust interfaces!
Below is a quick concept I drew up on word of what my main game screen will consist of:
I'm currently thinking a vertical linear frame first, with a frame that doesn't change for my important stats etc., then a frame in the middle which is switched by the buttons, but I'm stuck on how to implement this.
For the centre button screen, the map screen, I am hoping to add an image of a map which can be moved around, and somehow attach invisible button objects to points in this picture, maybe with an array of squares or something?
I understand this is a pretty open question and might be difficult to answer, but if you think you can help in anyway please do.
Thanks!

There is a log of possibilities, but you can use a LinearLayout with android:orientation="vertical" and include your stats in top. For the changing screens with buttons you can use a FragmentTabHost and create different Fragment for each of your views.
Check this example with a implementation.
Regarding the map, I think the easiest option is to use Google Maps Android API v2. Here is a example to use the maps v2 and a example of how to add markers to the map.

Display balloon tip in Android activity

I'm curious to implement a balloon tip to show info of different UI elements in an activity. How can I achieve this? On some little effort put to this (correct me if I'm wrong please) using something like canvas rectF???

It sounds like you're looking to create tooltip text. This isn't built-in to the View classes in android, so you'll have to create them or use a library like GreenDroid. This has already been addressed, see the following:
android how to make Tooltip for TextView
Android "Tooltip"