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Android Add custom items in costum ListView

I am creating a costum ListView
In this ListView I have the a list.xml with an item which has an image and three text fields.
Now to my problem :P
How can I add this custom ListView ITEM to my ListView (after a Button from another activity is clicked) and save it somewhere like in SQL...

Don't use ListView. Use RecyclerView instead.
https://developer.android.com/training/material/lists-cards.html#RecyclerView
You need to create adapter where you point proper XML file for an item

1. First, create a custom layout XML for your list row item(Image and 3 TextViews).
2. Create a custom adapter class to populate your ArrayList<OBJECT> on custom list row XML.
Here are some good tutorials:
Android Custom ListView with Image and Text
Android Custom ListView with Image and Text using Volley
Android Working with Recycler View
FYI, You can use RecyclerView instead of ListView. Android RecyclerView is more advanced version of ListView with improved performance and other benefits.
Hope this will help~

Alternate for a listview with single row

I have a ImageView with a TextView and Button. I have it currently in a custom list view, but I noticed now that I don't need to show more as one element (object). So I actually don't need a Listview to show the row (list entry). How can I show the list entry without a Listview?

You can put the elements of your custom listview item into a Layout, e.g. LinearLayout and simply add it to your activity's layout where you needed it.
You can set an OnClickListener for that layout, so user can click the whole thing.

I think you should use ListActivity. Then you can set up empty view for list. Here some tutorial: ListActivity and ListView Tips.
Also you can implement that logic with Recycler view by yourself or use library.
Here is solution from stackoverflow

Need to add a customized horizontalistview beneath RSS Feed application

Can we append component from async task to main activity (add a component beneath the main activity)

you can use open source libraries like.. Sephiroth Horizontal listview
Meetme Horizontal listview and there is many other libraries. you can grab than on github.
NOTE Google your question before asking and search on stackoverflow you will surely get your answer.

See, 1. if you have a listview already created. and want to add more items same as first listview items. you can add the items to the adapter.but items should be same. or so. (I am not clear)
2. if it is not listview (may be it is linear layout horizontal) in this you can also add views in your onPostExecute().
In listView how can we add view is like
ListView lv= (ListView)findViewById(R.id.listview);
assume you have set the adapter.now you want to add a view.
lv.addFooterView(here you can add view layout);
same you can do with (linear layout.)

How to add Toggle button in ListView items in android?

I am working Android application, Using ListActivity to create ListView then i tried to add ToggleButton inside the ListItems, but i didn't know that, please help me
Thanks in Advance

Here are the steps by which you can create Custom ListView:
Create row layout for your listview item which you want for ListView
create custom adapter by creating a separate class, and extend BaseAdapter
Override getView() method, inflate the above item row layout and display the data
For more info: android custom listview And if you want to learn about: AdapterViews and Adapters

Layout problem with Custom List and native controls

I am trying to have a layout with 6 TextViews and a Custom List.
TextView number 3,4,5 have images next to them,followed by the Custom List.
The custom list is done , but I am not sure how I can get the upper part ( TextView controls and images ) and the custom list in one layout.
For other custom lists I have always extended from ListActivity and set the list adapter in the same class as it is the only control on the screen.
In this case the class extends from Activity,how can I set the list adapter in the Activity class ?
Any pointer's to achieve this layout and which layout will be the optimal choice(Linear,Relative..) ?
Thanks,
Salil.

I found the answer to my problem.
Add a listview to the layout xml
Get the listview object using findViewById
User etAdapter to set the custom list adapter
Now I can use the custom list along with other controls in the same Activity.
Thanks,
Salil.