ANDROID STUDIO LISTVIEW SELECTED ITEM ANDROID
ANDROID STUDIO LISTVIEW SELECTED ITEM CODE

Additionally, if you need to set a new adapter, you can hold on to the scroll position: // Save the ListView state (= includes scroll position) as a Parceble You can use these two snippets to correctly manage ListViews throughout the activity or fragment lifecycle.

ANDROID STUDIO LISTVIEW SELECTED ITEM CODE

The code to restore the ListView state, including scroll position: // Restore previous state (including selected item index and scroll position) Parcelable state = listView.onSaveInstanceState() The code to save the ListView state: // Save the ListView state (= includes scroll position) as a Parceble

Once again, the best answer is buried on StackOverflow and not even marked as correct solution.

ANDROID STUDIO LISTVIEW SELECTED ITEM ANDROID

The best solution is to use the pre-defined implementation, which unfortenately is not very established in the Android community. While this might lead to the desired result, it is neither the Android-way of doing things, nor nice and clean code. Thus, some suggest to calculate the distance of the first ListView item to the top and then save the value in combination with getFirstVisiblePosition(). Slightly irritating and confusing for the user. When restoring the ListView using the first visible position, the ListView will usually make a small jump up. A ListView item, which is only partially visible at the top, will be ignored. I will not post the entire code here, since it has a major drawback: it is inaccurate.

If you research the issue, most guides will tell you to figure out the position of the first item, which is visible on the ListView with listView.getFirstVisiblePosition(). In this guide, I will outline three different approaches. Some apps at least restore the ListView to the general area, but not pixel-perfect. As an active Android user I see a common problem in many Android apps: they lose the scroll progress I made on a ListView after returning from a different view or restarting the app. ListViews are a very capable, but also sometimes a challenging component. This adapter can also be used with any ListView and can easily be adapted to fit ExpandableListView as well!.If you are developing an Android app, you probably ran into Android ListViews. A good example to such data-structure is this: class StateListItem Ī cursor-based adapter will be similar to that, just with a different approach to the data - as described before. In an Array-Adapter, we can make data-structure, Keeping our information aside to a selected-state information. On a cursor-based adapter, we can add a column to the DB table, making it in charge of that function. The flag representation must be for each item in the list, whether it’s a Cursor-Based adapter or an Array-Adapter, we need to make sure to have a field for that information. Make sure the selected item is painted differently than the other list items. Use the setOnItemClickListener of ListView to set a “Selected Flag” for the current item The user-experience I was looking for, was that each click on a list item will “select” it, and there will be a different button to press in order to finalize my selection, like a “Set” button under the list itself.

As I needed to make such Selectable-List, I had to find the right way, using the components given to me. Apple is well known for choosing the first approach most of the times). Their decision to make touch interaction simpler for the developer, limits the power of ListView (The old “Simplicity Control” trade-off. Long story short - they chose to ignore the “selection” of list items in touch mode! More about it on the Android Documentation. How can we do that in a touch screen? If pressing an item on the list perform a “Click” action, how can we perform a “Select” action? The Android OS developers thought about that, and decided to create a mode, called “Touch Mode”, which handles focus and selection of items differently. With keyboard, we can just press the Up and Down keys to select different items, and afterward hit “Enter” to click on the selected item, making it our “final” pick. However, it brought lots of issues regarding the handling of touch events with other inputs, like keyboard or trackball. Showing it to me 15 years ago, would’ve make me think that’s an act of pure magic! We can scroll, zoom and click with just a simple gesture, using our fingers. The touch screens brought simplicity to our lives.

Android studio listview selected item