using listview i want to view the images in list. each row has one image
I would to the following:
Write a custom ArrayAdapter for the Listview
pass an Array of Images or ImageURLs to you Adapter
Inflate the ListViewRows with you custom implementation - hence an image
I would recommend http://www.softwarepassion.com/android-series-custom-listview-items-and-adapters/
As a starting point. Since you are not giving additional information, there is not much more to do for me - except writing the code for you....
Related
I have a list view.
each item has an imageview
currently I'm using SimpleAdapter but I can't set the image Bitmap.
I'm using two Array lists one for Bitmaps and one for texts. I'm currently using the texts array list with a simple adapter
Now I wan't to set the downloaded bitmaps for every item in the list. how can I do it ?
I must write an adapter or I can do this without writing adapters ?
you need to override getView , inflate a custom layout for the ListView's row, with an ImageView and TextView for instance, arranged the way you like, and set text and image on those.
You will indeed have to write your own custom adapter. Inside getView(), you will be able to instantiate your own layout xml containing an ImageView and a TextView which you can fill with your data.
This will get you started: http://www.vogella.com/tutorials/AndroidListView/article.html
I am using this link to create custom listview in my app.
First I want to display listview with 5 items. As I scroll the list it should parse data and load listview for next 5 items.
Listview row contains 5 textviews.
How can I achieve this?
Please help me.
Thanks in advance
I want to display 5 items in single row
That has nothing to do with EndlessAdapter. That has everything to do with the ListAdapter you are putting into the EndlessAdapter. Start by not using EndlessAdapter and getting your list looking the way you want. Then, and only then, add in EndlessAdapter to add more data to the list as the user scrolls.
There are countless examples online of how to create rows in a custom ListAdapter that have more than one thing in them. Here is a free excerpt from my book on how to subclass ArrayAdapter, override getView(), and handle more than one widget in a row. You specifically will want to look at the "Customizing the Adapter" section.
I am trying to make a recipe ListView for food and I want to add imageViews next to items in my list. How can i do that? Thx.
A ListView item can have it's own custom layout.
You have to create your adapter for the ListView. When you create your adapter you can assign your custom layout.
Note: You will have to implement getView() to property set the image+text.
Here you have a sample: Lazy load of images in ListView
Following this tutorial could be a nice idea for you (mainly the second example).
http://www.mkyong.com/android/android-listview-example/
But anyway, you should Google a little bit before asking such a basic question.
I've been trying to fix this problem for a while and have exhausted all the different Google searches that I could think of. I'm a beginner with Android, but understand most of the fundamentals (I think). Anyways, I'm trying to display a list of data in a multi-column layout spreadsheet style. I'm using a ListView for that because I need users to be able to click on a row to get a more detailed look at the data since only so much can fit in a row. I have it working perfectly using a SimpleAdapter, but since the amount of data can sometimes be large, up to 500 entries, I wanted to change over to a Lazy Loader system so users don't have to stare at a black screen for 20 seconds while everything loads. I think I can manage with the Lazy Loader part, but I can't figure out how to switch over from my multi-columned format SimpleAdapter to an ArrayAdapter that all the Lazy Loader examples use.
Here's an example of my SimpleAdapter code:
SimpleAdapter adapter = new SimpleAdapter(this, fillMaps, R.layout.grid_item, from, to);
fillMaps is the List of HashMaps that are to be inserted. 'grid_item' is the layout that the entries are inserted into. 'from' is an array of column names (alternatively the keys in the HashMap) to be used. 'to' is an array of TextView items that will be filled in 'grid_item'. Any idea how to convert this to an ArrayAdapter? Or how to Lazy Load with a SimpleAdapter?
Thanks in advance!
To solve this issue for others, here is what I did to get it working perfectly:
Created my own class called Entry which simply contains the strings for the rows
Created a custom adapter that extends ArrayAdapter. For the constructor I pass into it an ArrayList of type Entry.
Create a ViewHolder for better UI efficiency
Inflate the row layout xml which is then added to my listview
To get the lazy loading working:
Added a method in my custom adapter that will append a new ArrayList of Entry objects to the ArrayList that I already have in my adapter
Created an onScrollListener and from some debugging test found that if the top visible item plus the remaining entries equalled the total entries, then I was scrolled all the way to the bottom
Once the bottom was detected, I would call my fetch method to retrieve another 30 entries, add these entries using the add method I created, and then use the notifyDataSetChanged() method for the ArrayAdapter to display the newly loaded items
Just write your own adapter. Create a private a class in your Activity that houses your ListView that extends BaseAdapter. Fill out the abstract methods and display your data however you want to. As useful as SimpleAdapter obviously is, you'll get a lot more traction out of your own adapter, and they're really not difficult to write.
Can I use my existing ListView as a sub-view in another view.
eg. I have a custom view, players list, I have implemented with a ListActivity and ArrayAdapter and is working fine.
Now I want a way to get this listview as View object so that I can add this view object as a child to another view.
I am thinking like, to build entire listview: my ListActivity is calling the ArrayAdapter iteratively by passing ArrayList item each time to build a list item view.
If I am correct, I need a way to call the same ArrayAdapter and need to prepare a ListView Object, right?
Can anybody plz help me.
Thanks in advance.
vpapana
The ListView and the Adapter are two different things:
The data is somewhere (in an array or if you need to be able to add/remove items, in an ArrayList)
The Adapter contains the data
The ListView displays it.
So:
Construct your empty ArrayList
Construct your adapter based on your ArrayList
Construct your ListView based on the Adapter
Then:
Each time you need to change the data, update the ArrayList
Call Adapter.notifyDataSetChanged()
Watch your list being automatically updated :)
To add your list to a tablelayout, see the API documentation, SDK tutorial and this tutorial which has a specific section on how to add rows programmatically.