Search_Layout | 一款封装了 历史搜索记录功能 & 样式 的Android自定义搜索框

I want to show the data I got from json in my android project in the search layout section, but the data is not visible. Can you help me?

My Code:

I want to hide my Searchview when I scroll in my Fragment. I use a RecyclerView to retrieve my item and scroll them.

My fragment are actually like that:

When I scroll I want it to hide and then when I return to the top, I want it to show.

This is the xml of my Fragment:

I have a searchfield on the top of the screen (but not in the toolbar) and below I have he recyclerview content:

I'm trying to place a set of elements in a column, inside my LinearLayout. The problem is that it doesn't recognize instruction like "layout_below" (it says it is invalide): This is the result:

The result I'm expecting is the first TextView and Spinner on the first line, The "Release" TextView and the EditText on the second line and the other three elements on the third line. This is the code:

I'm trying to add a Linear Layout inside my Constraint Layout. I know this shouldn't be done, but I'm gonna explain the reason: I wanna make that linear layout as "invisible" by default. As soon as a user press on the checkbox over it, I'm gonna be making this layout visible to the user. Th problem is that I don't know how to set it between the checkbox and the recycle view. I tried with the command like app:layout_constraintTop_toBottomOf, but this is the result:

It is anchored to the top of the layout even if the arrow to the checkbox is correct. This is my code, how can I improve it?

I'm trying to add a label next to my Floating Action Button with the tag app:fab_label in each element, but it doesn't show up. This is my code:

I'm trying to modify the position of my Floating Action Button, but I don't understand why the margin from bottom doesn't get recognized. This is how it looks like, what I wanna do is move the visible FAB a bit upper from where is it now:

This is the code:

I'm looking to implement a search function. When it runs, logcat is telling me:

E/RecyclerView: No adapter attached; skipping layout.

I have searched SO and the net and the answers tell me that I need to set the adapter and the linear layout manager. As you will see with my code, I set both. Alex Mamo's (@AlexMamo) work on here seems to point me in the right direction but I'm still getting the error.

My Activity