Develop Reference

Layout with a ListView

I have a Activity with a layout that is a Vertical LinearLayout with a RelativeLayout, ListView, and another RelativeLayout. My problem is if the ListView is longer than the screen, the bottom RelativeLayout will be unreachable. How can I ensure the last RelativeLayout is always at the end of the ListView? Can I make it part of the ListView somehow?

If you want the Bottom RelativeLayout to be fixed use the root element as RelativeLayout and use alignParentBottom = true to bottom RelativeLayout and position ListView below top relative layout and above bottom relativelayout.
if the bottom Relativelayout has to scroll as you scroll listview add it as a footer to the listview.Checkout this on how to add a footer to listview.

i suggest you to use recyclerview instead of ListVIew

CoordinatorLayout view isn't scrolling with full height header

I am using this as an example and when I give height "match_parent" to my AppBarLayout it doesn't let me scroll my view.

ListView with relative layout and scrollview

I am using a scrollview in which i have added 3 relative layout and a list so the stack is like
Scrollview
Relative Layout
Relative Layout
______ ListView
Relative Layout
Now when i am trying to add entries in listview it is now increasing its height. I have set wrap_content for the height field.

Use only listView and add the relativeLayouts as headers/footers.

Fix the height of listview because you are using scrollview
you can scroll and view that list while scrolling content inside listview.

How to add more Items in Scrollview in Android?

My android page has 10 EditText and 10 TextView. but there is no space in my screen in the Graphical Layout. i just added 5 only. im using Scroll layout. how to add additional 5 items in the screen without reducing the items height. Is there any coding here.?

<ScrollView>
<LinearLayout>
<TextView/>..
....
..
</LinearLayout>
</ScrollView>
You can add multiple items inside a LinearLayout. Since ScrollView is scrollable it won't affect the dimensions of the Views inside. You can add as many views as you need without worrying about screen size or View size..

You should add a LinearLayout as the only child inside your ScrollView. Then get a reference to that LinearLayout :
mLayout=(LinearLayout)findViewById(R.id.myLayout);
and then add Views dynamically from code using :
EditText et=new EditText(...);
//....
mLayout.addView(et);

A ScrollView can have only one direct child, so you need to put all the other Views in a Layout, such as LinearLayout and put that layout in ScrollView
Make your ScrollView's height as match_parent and the inner LinearLayout's height as wrap_content. The LinearLayout will stretch according to the number of children inside it and if the height exceeds the height of the ScrollView, the overflow can be seen by scrolling. If the ScrollView and inner Layout both have same height or if ScrollView have larger height than inner Layout, the scrolling won't happen for obvious reason.

Centering a scroll view

I'm trying to have a ScrollView centered top to bottom within its parent, but I'd also like the ScrollView to be no taller than the height of it's child. The child's height is variable. If there is room, the ScrollView should stretch to be exactly the height of it's child. Any suggestion on how to set up this layout?

Put the ScrollView inside a android:layout_height="match_parent" RelativeLayout.
set the ScrollView to android:layout_centerVertical="true".
Set the ScrollView's height to android:layout_height="wrap_content".
This should get you a centered scrollview that is up to but no taller than the relativelayout that contains it.
Out of curiosity, why do you not want the scrollview set to fill_parent/fillViewport? I would suggest doing that, and simply centering the content of the scrollview instead.