Develop Reference

how to show and hide buttons in listView

As shown in the image when I click on an item in the list view. Buttons show up.
I want to hide buttons when I click on different items and show on current clicked item.
How can I make it work?

Need to preserve view into a variable like prevView. and then click on another item.
Check whether prevView is null or not. If not null. then get button id .
e.g. prevView.findViewById();
and Make their visibility.GONE. and also null prevView.
I hope this will help you.

You can achieve this by making a model class.
take variable for particular buttons in Model. after clicking on a different item set true/false tag in the model and show/hide view according to that tag.

You should be using an expandable ListView so that you can get the buttons shown when you tap on the list item and it get closed when you tap on the other item in the list.

Change imageview for selected item in listview

In my layout I have a button and a listview. How can I change the imageview of item I selected when the button is clicked. So lets say, I select 5 items, and after I click the button, images for those 5 items will be changed.
So I am confused what function I should use. Right now i used button.setOnClickListener but it seems wrong because only the very first item's imageview will be changed when button clicked. Should I use listview.setItemOnClickListener? Or is there any other way I can do this?
Thanks a lot!

Add a boolean to the data object in your adapter. Say you've got ArrayAdapter<MyDataObject>. Add some kind of "selected" field in the MyDataObject, and toggle it when you "select" the row.
Override getView in the adapter (you'll need a custom Adapter, btw. I'd just extend ArrayAdapter). When you render the row, if the "selected" field is true, show the "other" image.
When you click the button, call 'notifyDataSetChanged' on the adapter. The will cause the visible rows to refresh themselves (and call getView for each).
I think that'll work.
Since you only want images to change when you click the button, you'll need to have some kind of global boolean, so the getView won't show the image until the button has been clicked.
The complication here is, you have to deal with rows that may have been scrolled out of view, which don't have active views, but logically exist. It would be really hard to explain the concept here. I'd suggest some tutorials on ListView if you're not familiar with the recycling of row views.

You can used custom baseadapter for listview and setonclicklistener in the getView() method.... see tutorial here this is hope for help

You can use button click listener as well as on itemClickListener too but to make a image view in selected state in a list, you have to call setSelected method of imageview parent layout.
Please put a comment if you don't get me.
Thanks

How to set selector true on back to grid view

I use grid view here, and i do open an full image on click of grid view item
When i do back press to my Grid view i want my last selector position true.
please help me to find out this
Thanks in advance

An easy way is to save the gridview position of the clicked element when clicked. Use SharedPreferences. You can load the status in the onResume() function.

Android: How do you remove the selection behavior from the Gallery?

I really need horizontal scrolling in my app, so I overrode Gallery and I'm trying to do something with an OnItemSelectedListener, and a GestureDetector I'm calling from an OnTouchListener I've set on the Gallery. What I want is to remove the auto-selection of Gallery items as I scroll, but I want to be able to click an item to select it.
If I set an OnClick listener on a view that is populated in the adapter, the Gallery fails to scroll. Also, the OnItemClicked event is never called for the listener I set for that on the Gallery.

To remove selection from all items you should do this:
youGallery.setUnselectedAlpha(1);

Maybe my answer to this question will help you. It's something which wasn't intended to be ever realized...

For your case why dont you just use a HorizontalScrollView. Just put a linear layout inside and add as many imageview's as you need if your using images, or dynamicaly add it in java code.
This will elemenate the selection of gallery by default. This will be easier than trying to Override the Gallery widget default methods.

Why not you set some tag while you click on an item in the Gallery to select.
Now once again when you click after the item is selected just check for the tag that you had set, and based on the condition you can move to new screen and whatever task you want to perform.
But keep one thing in mind, you have to set the tag with every gallery item while building the gallery view.
I hope you will get what I want to say.
If still you have any problem then let me know.
I had the same scenario and I solved that.

Custom Listener for a ListView item

I have a View with a ListView appended, which actually uses a custom view item done programatically. Inside each list item I have a button which I need to track, to update another item in the view. It is only invalidated when you click on the list item button, not anywhere else in the list item.
So I thought of creating a custom Listener. I trigger it when the button is clicked, but I have no way to access it from the ListView activity.
Is there a way to simulate those setOnItem...Listener's using a custom listener? Thanks in advance

Please see this link to help with how to set onClickListener from within custom ListAdapters.
You can use the myButton.getTag() and myButton.setTag() to put and get data to/from your View/Button.
See this link as well to help with custom ListAdapters.
Here is another good example I found of how to use a custom adapter.