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How to update layout of item view in listview on Activity

My app have an button(B1) custom ListView that item view include : checkbox,textview
Goal is I press button B1 then all checkbox in ListView will be setVisible and I had done it BUT THIS IS WORK FOR WHAT IS SHOWING ON SCREEN. When I scroll Listview in case multi-rows that the others not be visibled
Let's see my explanation:
- Example that there is 10 items in list data -> Listview on current screen just show 5 items ( 10 items is still visible when scroll)
- When press button B1 that just CHECKBOX of 5 items is visible, the others is not working
I mean I want to change layout of view item right on Activity

Because you are only updating the views of layout. You need to also update your data set (array of your adapter of listview) but I know you don't have a boolean variable in your data set to decide whether checkboxs are visible or not. First you need to add variables. After button clicked, don't update views of layout. Only change the datas (boolean variables) and call notifyDataSetChanged() method of your custom adapter. notifyDataSetChanged() method will recall your getView() method of your adapter for all views visible in your screen. Values will be updated correctly if you check visibility of views in your getView() method. Other items after scrolling will be correct because your getView() method is correct.
If you don't understand the answer add your OnClickListener of button and your custom adapter class. I will update them.
Edit: You have focused on the wrong problem. Your solution isn't related to updating the layout. You have problem about logic of how listView should works.

How to identify if a row is visible in a listview

I have a situation involving animation of listview's item appearances.
I have a few views in a ScollView , the last of which is the listview. I have attached an appearence animation of the row (a fade in animation).
The problem I have is that when the screen is loaded , the getView() of listview already executes for the initial items , even though the listview is not currently in view.
Hence when a user scroll downs , he sees the list plainly.
I am unsure how to go about this situation . Is there any callback that can be invoked when a row from a listview becomes visible on screen ? .

Yes there is a callback (OnScrollChangeListener), first visible index and last visible index etc. You can achieve what you are trying to using combination of these.
But you need to try that yourself first. No one can simply write a code for you.
You can learn about listview here

How to get correct position of a checkbox in a scrollable listView?

I have a scrollable listview that has 2 textViews, 3 imageButtons and 1 checkBox in each row.
In the Header of the listView, I have a delete button just above the column containing all the checkboxes of the listView.
I have to perform the delete operation of objects in the listView when 2 or more checkBoxes are checked randomly by scrolling the listView and thereafter the delete button at the top is clicked.
But the problem is that i am not getting the correct poition of the checkbox that was selected. Moreover, sometimes i get the correct position but still the object to be deleted passed is wrong. Hence the entire functionality is affected maybe due to the scrolling nature of the list.
Should i take the position in the holder of the adapter class and also bind the state of the checked or unchecked checkbox with my object.
And should I use checkBox.setOnCheckedChangeListener() or deleteButton.setOnClickListener().
If i use the latter one, then how to get all the corresponding objects of the list whose checkboxes were checked before pressing the delete button?
And where should all the related code be placed..in the listAdapter class or in the activity?
Please help me find a solution to this problem..

first of all in your getView() method you should set a specific Tag to each checkBox. For example: check1.setTag(position) then you should implement both OnCheckBoxChangeListener for your checkBoxes and OnClickListener for your delete button. As you know setting of onCheckBoxChangeListner have to be in getView() method. Then you add positions of list that their checkBox is checked to the a ArrayList with the help of getTag() method of chechBoxes in onCheckedChanged() method.

Try getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {}

how to keep check box selection in ListView

I have created a custom ListView.. every element of my ListView constructing from a layout.
My layout will have some TextViews and a ToggleButton. My ListView will have some 50 elemnts and my device screen can show 2 elements at a time.
Now if we select ToggleButton on a Item and scroll down my ListView , the selected item will be out of screen and when I come back to the previous selected item I am observinf that selection for that toggle button is gone.
I know that this is a normal behavior in android that It will construct the elements which is currently displaying.
But I want to keep that value.. Is there any way that we preserve selection. or can I tell ListView to donot construct every time.. memory is a not a issue for my application.
Please let me know if there's any good solution for this.

You could store the states of the checkbox in a map with the position as the key. So whenever the list reloads after scroll, it loads based on the hashmap state. You should write this logic in the getView()

ListView recycle views that are visible on screen

I have a problem with ListView which recycles views that are visible on the screen.
I can have up to 4 items in my ListView, they are all visible on screen.
After I update a property of an object in the ArrayList that the ListAdapter uses i call the notifyDataSetChanged() method of the list adapter.
This causes the ListView to recycle the views and to redraw it self.
The problem is that it's doing the recycling in a reverse order. so if i have a button on the first Listview item it will be in the second list view item after the notifyDataSetChanged().
I have getView that changes the convertView properties except for the button onTouchListener.
This is very problematic if i have a button that works with touch event (Like PTT button). its visible for sometime and then it becomes invisible :-(.
1. why does the ListView recycle items that are visible on the screen ? is this normal behaviour? why does it do in reverse order ?
2. what can I do to solve my issue ?

You should provide code for getview() method. And adding button to an item could cause problems when you are not using checks on adding button.
Rather than adding button you should include button in all items and just make visible invisible the button at specific position where you want.
Also make check of "null" for creating convertview in getview() method. This way it would not recycle/create views/item if they are not null.