How do I implement a listview which displays images an text dynamically from the web? Each image has some descriptions to it and I need them to display correctly in each list. The images change every once in a while. So I have to retrieve up to date contents.
I have read this, but have no idea how to include text into it. Any help here?
Thanks.
Here you will find full details and along with Full working Source code
Android lazy image loader example
Use an ListView Adapter like here: http://android.amberfog.com/?p=296.
The getView Method is executed for every row of your ListView, so you have to place your code to load the images right there
When the Data changes simply call notifyDataSetChanged on the ListView Adapter and the ListView will refresh (executs getView again).
Related
I am working on a android project and i am implementing an adapter for my listview.
My adapter simply load an image and a text together and show them on the listview
but it's not efficient to load all image on cach.
So i'm looking for a way just to load image which are shown to the user on listview and every time the user scroll up/down the images of list being update
Is there any way to do this?
thanks in advance
In List View, getView() method of the BaseAdapter is called for only those views which are shown currently on screen. So you can use Nostra Universal Image Loader library to load the images asynchronously.
I have 100 items, all have an image and some description, i have a ListView and i want to open the items with ListView, so how do i do that ? i want to show description and image for each item. do i need 101 activities?
No You Can Use Listview With Image And Text Using List Adpter Here I Send You Link See My Answer Step By Step U Follw it.Listview With Imageview
Fedor's LazyList is simple and very efficient, and loads the images from a URL, but I could also modify it to load images from resources folder.
No, you only need one activity and one Fragment. Each time you click one item in the ListView, call replace and update your fragment. I think that should be method that helps you refresh its content view . Or you can create a new one (not best solution)
I have created five Horizontal ListView with images and texts in one activity. Using Lazy loading of images concept it is working fine. Now when it is offline, the list is showing blank,ie., no data . I need to implement memory-caching concept, such that when it is offline it will be showing the previous session datas(images & texts).
In oncreate: I am calling the Asynctask. In doinbackground method of asynctask,I am consuming Webservices containing images & texts,then I am passing those datas to the adapter. And in postexecute, I am setting my adapter to Listview.
In adapter class: getview method I am setting the texts and loading the images using lazy loading.
Please help me to get rid of this. Thanks in advance
You should store text etc. in an SQLiteDatabase and store your Images on external storage.
I wonder if there is a tutorial or example code how the effect below achieved in Android, or if someone published an adapter already for this... Basically based on the number of results returned the screen is populated with boxes, and as the finger swipes down more boxes will load on demand until the results run out.
This is a GridView. And you can use your custom Load More GridView. This is a custom ListView example of the same. You can implement your own custom GridView similar to this.
What you are looking for is a Lazy List Adapter.
There is a great implementation for it. You can check it here. All what you need next is to create the layout of your list rows, i.e the boxes.
Ok i wasted 1 day of my life i think now is the time to ask for help :D
I have a listview that has an image text ..etc (custom view) and one of its
elements is a Gallery. (Aka horizontal listview)
Gallery also is a custom view.
SO.. here is the problem:
I call the adaptor to set the custom view in the listview.Ok for now.
Inside the listview adaptor i call the Gallery adaptor.Ok for now.
Everything render out as it should be with a very nice complex interface.
Now the problem
When i scroll the Gallery the data change to what the data should have been if i scrolled the gallery of the last listview row rendered.(Hope you get me here)
Ex.gallery in first listview has photos of the sea.
gallery in 2nd listview has photos of a building.
If i scroll the first gallery the photos change from "sea" to building".
Meaning ... each time the listview adapter's getView is called i feed the galleryadapter with data
gal1.setAdapter(new GalleryAdapter(CON,PASS[position]));
What i'm thinking as a possible solution is :
Hardcore , preload all the data in the custom Gallery of each listview.
Figure a way that when i scroll the Gallery element within a listview , the gallery adapter to be aware of the index of listbox and load the correct data.
I think the second solution is more elegant,and more difficult but considering that if i go for the 1st solution there will be >40 views loaded at all times so no biggy.
So.. I;m asking for your help.Is there a 3rd , 4rth .. way?Is anyone of my suggestions even possible?If so please point a way of implement to code.
Keed in mind that i want to be able to do multiple scrollings at any given moment.
So i think that my 2nd suggestiong might have some problems there.
Try using same gallery adapter for all list items and in getView of list adapter just change the data for gallery adapter.
After setting the data in getView just notify gallery adapter.
out side getView(maybe in constructor of list adapter)
GalleryAdapter galleryAdapter=new GalleryAdapter();
in getView
galleryAdapter.setData(CON,PASS[position]);
gal1.setAdapter(galleryAdapter);