Develop Reference

Nested Recycler View Scrolling Issue

I have used Recycler View Inside Nested Scroll View(which is within CoordinatorLayout):
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/sections_recycler_view_linearlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" />
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
Within the adapter of above recycler I have added Child Recycler Views programatically using setNestedScrollingEnabled as false.
My Issue is:
When I am scrolling the child recycler, as soon as its scroll is completed the parent recycler scrolls to top, as if I am setting its adapter again. I have not added any code to notify adapter or to scroll to top-most recycler item or to set adapter again. I could not figure out the reason for this strange behavior.
Any help would be highly appreciated.. !!!

Add to your parent Recycler View:
android:descendantFocusability="blocksDescendants"

I was display progress bar in child recycler views until I receive data from server. And once I get data I was populating it. I had used staggered Adapter for child recyclers with row count 2 and hence after data got populated my parent recyler's height was changing.
I used setHasFixedSize(false) for parent recycler view as its height was changing and I have not seen the issue again till now.

Easy,
Add
android:fillViewport="true"
to your NestedScrollview and you will be good to go.

ScrollView not scrolling which has ListView inside (listview is scrolling)

I have a ListView inside ScrollView, the ListView works fine (it scrolls) but the ScrollView is not scrolling
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</ScrollView>
</LinearLayout>
I want the full page to scroll (The textview should also scroll)
TextView
ListView
item1
item2
.
.
The full page must scroll along with the textview!

This will never work because your listView is effectively a scrollView, so you have a scrollView within a scrollView. Is the textView of fixed size or can it be a large amount of text? I would consider some redesign here as this is not a very good way to design a UI.
If the textView is big which means you only see a small bit of the list then you should be able to scroll by touching the textView only, but i would make the scrollView the Parent and remove the first LinearLayout, it is not needed

Instead of ListView switch to RecyclerView and inside your MainActivity.java in onCreate() do this recyclerView.setNestedScrollingEnabled(false);

You should never use a ScrollView with a ListView, because ListView takes care of its own vertical scrolling. Most importantly, doing this defeats all of the important optimizations in ListView for dealing with large lists, since it effectively forces the ListView to display its entire list of items to fill up the infinite container supplied by ScrollView.
The TextView class also takes care of its own scrolling, so does not require a ScrollView, but using the two together is possible to achieve the effect of a text view within a larger container.

View invisibility when RecyclerView is empty

I am using a LinearLayout with some views inside. The second last is a RecyclerView, and the last one is an <include> tag linked with a RelativeLayout. I want the last view to be visible permanently, as I want to use it to add items to the RecyclerView.
My problem is that the <include> view below the RecyclerView disappears whenever the adapter is empty. Is there any way to avoid this behaviour?
EDIT
There is a constraint in the way I want the RecyclerView and the "add" View to work together. I would like that it feels as the "add" view is always the last item in the RecyclerView, as it happens in Google Keep lists.
Example Google Keep list example (I cannot add images yet)

You could try to replace your LinearLayout with a RelativeLayout; then you anchor the bottom view to the bottom of the screen, and the RecyclerView would be set above that view. Something like this (just a skeleton):
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent>
<-! other views here -->
<include layout="#layout/something"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:id="#bottomView" />
<RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/some_view_above_recyclerview"
android:layout_above="#+id/bottomView" />
</RelativeLayout>

Android: Data list scrolling along with other components

I'm trying to show a list of data in an android activity. Normally anyone would do that with a simple ListView which I have used many times before. But now I'm having an application with a fixed header and footer, with the middle part (the content) scrolling underneath both the header and the footer. In the middle section I would like to add other components both above and below the list of data, but the entire part must be scrollable. I tried adding components (like a button, textview etc) to a listview but the lay-out builder in Eclipse won't let me do that.
So I started using a ScrollView where you can easily add any component you like. But I am not allowed to add a ListView to a ScrollView, which I can understand as it would create a strange effect (as both are able to scroll).
Next I wanted to use a TableLayout to dynamically add TableRows, but on multiple websites it is said to be slow and 'not the way to do it'. I also couldn't find an elegant way to add the seperator between each item. With a ListView that would all be done very easily.
The following image probably explaines at best the effect I want: http://tinyurl.com/bvkec5d
The table with the 'Table Data' header can possibly have a lot of items and thus can become very large in length. What I don't want is that the table has a fixed size and the items are scrollable within that table. I actually want the table to grow in size and the ScrollView containing the table should therefore be growing as well. I also want the infobox above the table to scroll along (as with any other components which might be added later).
What is the best way to achieve this effect?

You can use a simple vertical LinearLayout (or a RelativeLayout) that contains your static header and footer, and use a ListView between them. You can set header and footer views on the ListView to add the scrollable header and footer content. For simplicity of example here's the LinearLayout way:
<LinearLayout android:orientation="vertical"
android:layout_height="match_parent"
android:layout_width="match_parent">
<!--static header content... can be any kind of view-->
<TextView
android:layout_width="match_parent"
android:layout_weight="0"
android:layout_height="wrap_content"/>
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<!--static footer content... can be any kind of view-->
<TextView
android:layout_width="match_parent"
android:layout_weight="0"
android:layout_height="wrap_content"/>
</LinearLayout>
And in code, you can say:
ListView theList = (ListView)findViewById(R.id.list);
// example of creating header and footer views from inflation or by instantiation in code
View myHeaderView = getLayoutInflater().inflate(R.layout.myHeaderLayout,theList,false);
View myFooterView = new TextView(this, some layout params);
theList.addHeaderView(myHeaderView);
theList.addFooterView(myFooterView);
ListView.addHeaderView and ListView.addFooterView should enable you to add other static views (whose content could be updated dynamically) to the top or bottom of a ListView:
public void addHeaderView (View v)
Since: API Level 1 Add a fixed view to appear at the top of the list.
If addHeaderView is called more than once, the views will appear in
the order they were added. Views added using this call can take focus
if they want.
NOTE: Call this before calling setAdapter. This is so ListView can
wrap the supplied cursor with one that will also account for header
and footer views.

Can I make the entire activity scroll instead of the ListView?

I'm populating an activity with a ListView that sometimes exceeds the window size vertically. Instead of the user being able to scroll the ListView, I want the ListView to just take up the space it needs and let the users scroll in the activity instead. Is this possible?
Here is an image for clarification: http://imgur.com/1I2bc
On both sides there is a ListView containing 8 elements, only the right one takes up the space it needs to show the list fully though, pushing the other views down and making the entire activity scrollable.

You need to use the methods addHeaderView and addFooterView to add views before and after the ListView.
To add several views, first put the views in a Layout or ViewGroup and add that ViewGroup as the header or footer view (ViewGroup is a subclass of View).

-have you tried to put your scroll element as top level element in your layout .xml?
Something like this:
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ListView
android:id="#+id/listView1"
android:layout_height="wrap_content"
android:layout_width="fill_parent">
</ListView>
</ScrollView>