ImageView | 仿微信图片交互，支持pc端的html5，支持自适应，支持横竖屏

I'm doing a Group Chat with Firebase and currently I'm using a RecyclerView to display chat messages and I'm having a problem. When you open the app in the fragmented home and you go to chat activity and start chatting (adding elements to recycler view) all goes fine. But, when you go via the NavigationDrawer to another fragment and get back to the chat fragment using again this Navigation Drawer. When you add one element in the chat it appears all in the blank it just displays the last message. Anybody knows why does this happens?

Here I leave the RecyclerView Adapter Code:

So I am relatively new to programming, and I have been working on this task app, where I want to save the data such as task name and more, given by the user. I am trying to accomplish this using Room. Now, initially, when I tried to do it, the app would crash since I was doing everything on the main thread probably. So, after a little research, I came to AsyncTask, but that is outdated. Now finally I have come across the Executer. I created a class for it, but I am a little unsure as to how I can implement it in my app. This is what I did :

Entity Class :

I'm retrieving the data from the API, and the image I'm getting it as a String.

In the API it shows something like this: image: "/9j/4AAQSkZJRgABAQEAYA..."

I'm using this to set it on the ImageView:

I'm trying to add image inside of UITableViewCell with UIImageView, and really added "normally", but when i change the size of UIImageView. I get this error message:

[LayoutConstraints] Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. ( "", "", "", " (active)>", "", "" )

Will attempt to recover by breaking constraint

but i've tried many things, like simple things, just image with background and size, example:

I'm new to android studio and i'm not sure what was going on with it. How can I solve this error?

In the logcat, it mentioned that I required a view for recycler_food_list which apparently I had already coded into the foodlistfragment.java.

Logcat

I have a function to change an image and its opacity in a JavaFX GUI:

Why does relative layout makes my widgets disappear. Whenever I am adding edit text in the code, everything dissappears.

I'm trying to show all user posts that the user who is using the app follows, and I'm using Firestore. I take all the ids and put them on an arraylist and build a query. I am using FirebaseRecyclerView but I have this error:

I have UIImageView with constraint look like picture TableviewCell

but when set image from array Data, it's display wrong (outside of imageView) Image display wrong

i've set in tableView