I have a ListView which has 3 different types of items, and I want each of these categories to have a different selector. I've accomplished that so far using a different item layout for each category, but I think it's a bit silly, since the only thing that changes between those 3 layout files is the selector attribute android:background="#drawable/cat1_selector"
Isn't there a way to do this programmatically for each item via a method similar to setSelector in the ListView class ?
Thanks !
Or, you can set the selector of the View by Overriding the getView() method of your ListAdapter.
Check more here
Related
What's the easiest way to create separate preferences for each item in an Android listview? I found this question, but it's kind of general. Could anyone be more specific, possibly show a quick example?
If you want to do this, you should write some code into your adapter getView method.
You can check the position (with an if-clause) in the method and add a custom desgin/layout depending on the position.
If you use a LinearLayout or RelativeLayout in your ListView item XML you can fill this programmatically in the getView method with all the widgets (edittext, checkbox, etc) you need.
hi I want to use a listview (probably) is it possible to fill each entry with say two buttons two text areas, and have them laid out with realtive or linear layouts?
I have used a scroll view with layout inflator to achieve this at the moment, but I'm thinking listview would be better maybe?
yes you can. you need to use a custom list view for that. making an activity by adding a listview in it and then referencing another xml to that listview using an AAdapter so that every element of the listview has the layout of the second xml file. this tutorial should help you understand the idea.
Yes you can place any widgets for the particular List Item for your listview.
For defining that kind of ListView, you have to define a custom adapter, follow the below steps:
Define a one row file for the list item, say for example, RelativeLayout with 2-3 TextViews.
Define a class by extending BaseAdapter.
Inflate the XML and do display operations inside the getView() method of this class.
Set this adapter to the ListView.
I know that similar questions have already been asked but I do not understand what would be the correct approach of solving the issue, yet.
I would like to change the background color of a ListView row when the user clicks it. However due to Android reusing the row layouts when scrolling, the background color gets repeated for other rows. I am wondering what would be the correct approach of maintaining the original layout for all rows except the one changed programmaticaly and also maintain the changed layout information for that row for scrolling back. I am using a SimpleAdapter which is passed the rows layout's XML.
Regards
Your rows' capabilities within your ListView largely depend on the kind of Adapter you are using. In any Adapter where you manually construct or inflate the View per item, you can change the layout properties per item, as long as you do so within the Adapter. Simply add your background color code to when the item's View is built, and it will work like a charm. If you are not able to do so with the current Adapter, consider extending the current one or using a different adapter.
Note: I haven't placed code directly within this answer because where you add it depends upon your own implementation. For instance, I would add .setBackgroundDrawable() to bindView() in an extended CursorAdapter.
Hope this helps,
FuzzicalLogic
I found the following design in market of my tablet. I want to design a layout as like the below tables containing a image, text and a button for my android app. how to do this
You can achieve simple table look, by setting different colors to rows and cloumns and set appropriate margins in that here is example. Here he sets only border but you can fill any color or drawable inside column.
For this solution, i would suggest you to design custom adapter to be displayed either in GridView or in multi column ListView.
But i think GridView would be best to implement the above functionality.
Now, to define a custom adapter, you just have to create a simple class and extends BaseAdapter, and then you have to override the getView() method inside this class. Now within the getView() method, you can inflate() the custom row layout file (which you define for one item , this item xml layout file represents every items inside the GridView).
Here is the simple example for implementing a simple GridView.
For the detailed exmmple of such gridview, refer this example: Android - GridView example
In my app, I should set up a "real" custom listview.
For example :
First line(Some Text) Checkbox
Second line(Some Text) Spinner
What I mean is that each line has different widget. In the example, for the first line, we have a checkbox, for the second, it is a Spinner.
Does someone have any idea of how I can set it up?
Thanks a lot!
Do you really think you need a ListView? Or could a ScrollView fix your problem already?
If you definitely need a ListView, read my answer here: How to add multiple headers throughout a single ListView with addHeaderView()?
You can define different types for your items and return a different layout for each type, while still having the possibility to get higher performance by using convertView.
Check out an example given on this page for defining custom-listview: http://www.androidpeople.com/android-custom-listview-tutorial-example/
Same way, you can define your custom-layout for listview, you just need to implement getView method.