Develop Reference

RecyclerView not clickable

I have a LinearLayout with a nested RecyclerView showing a list of items. I'd like to open a popup when RecyclerView is clicked (either one of the items or the background white area), but the usual setOnClickListener is not working.
Of course I can put a click listener on each of the items, but the white area between them remains unclickable.
Is there a way to make the entire RecyclerView area clickable?
EDIT: I've added some sample code. I'd like to have the entire layout clickable to open a popup, but while the first three views behave properly, the RecyclerView does not.
<LinearLayout
android:id="#+id/layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<View
android:layout_width="match_parent"
android:layout_height="#dimen/spacing_half"
android:background="#color/color_item_margin_divider"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/fragment_tags_title"
style="#style/ItemFragmentHeader"/>
<View
android:layout_width="match_parent"
android:layout_height="#dimen/spacing_line"
android:background="#color/color_line_divider"/>
<RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/spacing_half"/>
</LinearLayout>

Add onClickListener in the viewHolder . Below is a snippet of my project where I had implemented Listener
public class MyViewHolder extends RecyclerView.ViewHolder {
public ImageView shotThumbnail;
public MyViewHolder(View view) {
super(view);
shotThumbnail = (ImageView) view.findViewById(R.id.shotThumbnail);
shotThumbnail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//Put here stuff that you want the onclickListener should do
}
});
Check if this link helps:
Detect click on RecyclerView outside of items

You should use padding instead of margin.
<RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_padding="#dimen/spacing_half"/>
Cause whenever you use padding it will crop your RecyclerView. But whenever you use padding it will just shorten your inside functions. hence you need padding. Then you should use an onClickListener in MainActivity.
recyclerView.setOnClickListener(v->{
//Do whatever you want
});

Move layout up when layout above shrinks in height

Hi I have a fragment with two RecyclerViews in it, one above the other.
The first is a list of items for the user to take an action on and the second is where the items will be populated once the action is taken. So when an item is removed from the top list it is added to the bottom list.
The issue I am having is when I remove an item from the top RecyclerView all the remaining items in the top RecyclerView move up to fill in the space left by the removed item, but this leaves a gap between the top and bottom RecyclerViews.
How can I move the bottom recyclerview up to fill in the gap created once an item is removed from the top RecyclerView
Here is my layout xml
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:layout_alignParentTop="true"
android:id="#+id/pending_tasks"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<android.support.v7.widget.RecyclerView
android:layout_below="#id/pending_tasks"
android:id="#+id/completed_tasks"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
I have tried calling invalidate() on the bottom RecyclerView but that has not worked. Any help would be appreciated, thanks!

It's impossible to update layout size once it's been displayed on the screen. If you modify the content of your RecyclerView you can't just simply refresh the layout to shrink it.
I would suggest using single RecyclerView and storing lower bound of the first list in some variable. Then simply update it accordingly to modifications in your first list.
Another solution which may help you:
Change Relative layout width and height dynamically

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>

Position textview below list & reposition it as size of list increases

In my layout, I have a textview which I need to be fixed at the top of the screen, a button to be fixed at the bottom of the screen.
Between these two, I have a list with a textview(with a drawable) below it. (please see image). I want the textview positioned below the list;i.e.; as list items grow, the textview should reposition itself. As I click on the textview, I add items to the list. I am able to achieve this, but as my list items increase, the textview goes below the list & is not visible. So what I see on screen is the top textview with the list below it & the bottom button. The textview to add items in list view is not visible, so I cannot add items to my list. I need that even if the list items increase, I want the list to be visible along with the textview.i.e.; as list items grow, the textview should reposition itself. I tried various approaches suggested with several combinations of linear & relative layouts & positioning techniques, but I am not able to achieve this.

Try this..
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="abc xyz"
android:gravity="center"
android:layout_alignParentTop="true" />
<ListView
android:id="#+id/lv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/button"></ListView>
<TextView
android:layout_below="#+id/lv"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Save"
android:id="#+id/button" />
</RelativeLayout>

You have to nest the layouts here. You could for example use a LinearLayout with vertical orientation as parent and place your textview and listview (or whatver you are using for your item list) inside the LinearLayout. Here's the idea:
-TopView: set to wrap content
-ListView: set to fill parent
-TextView: Set to wrap content
If I'm not mistaken this should set the top and bottom view to fixed sizes and make the ListView fill the remaining space.

You can try adding that button with image as footer to the listview it will work with less noumber of items when it exceed the screen hight remove footer and make the bottom layout visible(Have to add the same footer item in bottom layout also).