Does anyone have a good tutorial for implementing onItemClick() for a ListView populated by a custom ArrayAdapter?
I'm struggling with how Android is recycling views, and how to affect the layout of the selected view (which is a RelativeLayout). The way I've implemented it, I'm just doing a simple background colour change, but everytime I choose a row, when I scroll the ListView there are other off screen items selected too.
Any ideas?
Have a look to this answer. Custom code of ArrayAdapter.getView() (where view recycling is done) might be useful to you, I was trying to achieve something similar and it worked for me at last :)
You can find lots of good examples of the custom Listview with Adapters.Some of the Examples are listed below:
(1)custom-listview-android
(2)android-custom-listview-with-image-and-text
(3)Custom Array Adapter
Related
My problem is simple: I need to make a layout similar to android.R.layout.simple_expandable_list_item_1 which can fit more than one textview in the layout, as well as show the little '>' symbol that indicates that the tab is expandable.
How can this best be accomplished? My first thought was to use the layout as a background of a linear layout with two textviews in it, but I can't seem to make that work.
Vogella has a pretty good tutorial on how to achieve custom list views through Adapters.
Basically, what you do is you create a Layout with the looks you want for the list items and then you extend an adapter (ArrayAdapter for instance), see section 4. Then, in your activity, you create an instance of your Adapter implementation and populate it from an Array containing the data for the list.
Also have a look at the Developers site for how to make the list scroll smoothly with the ViewHolder pattern.
And if you feel you need more info on the expandable part maybe the hive can help.
What I want to have is a listview populated with my custom Folder class at the top, and objects at the bottom. I was thinking it would look something like it does in an OS.
I've spent hours looking through tutorials online, but the best I could find was putting an image and some text in the same row.
To be clear, I'm looking for something like this:
Folder_1
Folder_2
Folder_3
Item_1
Item_2
all in the same list.
Could anyone here help me figure this out?
The appearance of list items in a ListView is controlled by the getView() method of the list's Adapter. Any kind of customization that you want to do on a per-item basis (which includes having totally different list items) can be done from the getView() method. If you share some of the code of what you have already tried, others can help you further.
I would like to get the link to any sample suggesting drag drop list item views, with multiple dynamic items/texts. I have googled a lot for it, but got samples with single textview using arrayAdapter.
I instead like to put drag drop on custom listview hence BaseAdapter instead of ArrayAdapter, and the textviews to be populated dynamically in the BaseAdapter's getView(), and drag drop accordingly.
Please guide, as I am facing a lot of trouble doing this.
In my code, I had a ViewPager which dynamically adds items as well. I think you may find this thread helpful. It helped me solve my problem, cheers. android drag and drop
Below is an image of GPS Essentials app, which I guess a lot uses.
I am interested in making a menu similar to this. How is such a menu (or what ever it is called) created.
My first thought was to use a ListView having elements containing an image and text-view in vertical orientation. But then I was wondering if there is any better, preferably an easier way to do it.
I would be very greatful if you could share your experience with me. Thank you.
GridView is the solution exactly. You have to actually define a custom adapter for the GridView.
Why custom adapter? Because you have to inflate a custom row (having ImageView and TextView) to every item in your GridView.
Hint: Search for the example with word "Android Gridview example", you will get many articles/tutorials.
use GridView. You can find documentation here http://developer.android.com/resources/tutorials/views/hello-gridview.html
I'm working on creating a swipe-to-dismiss list view adapter. My basic methodology is to wrap the list item's view as the second view in a ViewPager and provide the necessary callbacks in the item change listener of the ViewPager. Through much pain I've got the View recycler working as intended, as well as ViewHolder and ViewBinder patterns implemented. I even managed to keep the ListView from taking over the touch events while the ViewPager is being scrolled without having to make a custom subclass of ListView (I can do it all from the Adapter).
Where I'm running into trouble is getting the selector and the OnItemClickListener to work. After looking at ListView's source it seemed that by overriding the ViewPager's hasFocusable() method to always return false (later on I'll pull this value from the child view) these things should have been reenabled. Unfortunately this is not the case. I've tried the setDecendantFocusability() workaround and I'm still stuck.
I'd like to avoid having to extend ListView if possible to provide the greatest amount of modularity. For similar reasons I don't want to add the selector to the ViewPager's background (if the dev changes the ListView's selector this wouldn't be reflected). Essentially I'm looking to make the ViewPager code transparent between the ListView and child View. Any ideas?
You are saying that you are making each list item a view pager, so that you can implement swiping to delete? If so... no no, this is not what view pager is for. First sorry it is just not intended to be used as an item in a list. Second it is for switching between views, not swiping to delete.
Unfortunately we don't have a sample code to show how to do this, but you can look at the platform's implementation of the notification pane or recent apps to get some ideas.