android - MVC: who should fetch data, adapter or activity -

-

I need to bring a list of data from the server, feed on the adapter, and show in the list view.

The question is, what should the backend call, activity or adapter do or?

And please explain why

Please answer in the context of a Model View Controller or similar (I do not know MVC on Android strictly).

Edit:

It is now clear that I have a very bad place to get the adapter data (imagine how flexible this would be. For example, if the same Data has two end points, or I have two data sets, it does not make any sense to bring any adapter data). Other component data should be brought and the adapter should be filled. To do this, activity is a good component.

The accepted answer provides an example of doing this.

anytime will not receive data from any activity because it Block .

You want the doInBackground (override @) the method you want with the AsyncTask parameters and return types and onPostExecute (Override @) method, give it data to call some public method on your activity

Finally, the activity should adapter it with the latest data.

In this way I always get my data and I get the result 100% as I want (Add a progress and make it visible before bringing data and giving it adapter before making it invisible ).

Hope I was clear enough for you. If you want some code as an example, please ask.

Workflow :

1 - Activity -> New MyAsyncTask (...). ); // Get Data @ Override Do Inback Ground

2 - MyAsyncTask.onPostExecute () {myActivity.giveFreshData (...)} // Distribute data

3 - Activity. GiveFreshData (...) {MyListAdapter.giveMyData (...)}

Altough This MVC is not how you should separate the UI from data consumption and data representation.


Comments

Post a Comment

Popular posts from this blog

import - Python ImportError: No module named wmi -

-
I followed the instructions for downloading WMI for Python When I try to run the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = wmi.WMI (): if Raw_input ("restart% s?"% S.Caption) .upper () == "Y": s.StartService () I got the error traceback (most recent call end): file ". \", Line 1, edit: I am using Python 2.7.6 EDIT2: I am running 64-bit Windows 2008 R2, and I've downloaded WMI-1.4.9.zip (md5). I removed the content and put it in D: Python \ Tools \ Scripts I executed dragon setup.py.install I said D : \ Python \ tools \ scripts to% PATH% and when I execute the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = Wmi.WMI (): If raw_input ("Restart% s?"% S. Caption). () == "Y": s.StartService () error me Gets traceback (most recent call final): File ". See \", line 1, & lt; Modu...
Read more

Editing Python Class in Shell and SQLAlchemy -

-
I am working on the terminal on a shell script after this tutorial SQLAlchemy tutorial. I need to type gt; & Gt; & Gt; Sqlalchemy import column, integer, string & gt; & Gt; & Gt; Class user (base): __tablename__ = 'users' id = column (integer, primary_key = true) name = column (string) absolute name = column (string) password = column (string) def __repr __ (self): return "& lt ; User (name = '% s', absolute name = '% s', password = '% s') & gt; "% (Self.name, self.fullname, self.password) After the problem I have typed the password = column (string) I hit twice and changed .... >> I then took everything back but then an error was thrown because the class already exists ... I am not completely sure how to fix it. How do I open that slip in the shell script and edit it (Add DF to DRR) The error thrown below: / user / giripeters / TFSQLLX / Lib / python2.7 / site-packages / sqlalchemy / ext / decla...
Read more

lua - HowTo create a fuel bar -

-
I would like to create a fuel bar (empty with full tank). When the user touches the screen, the fuel once Dairejh these is my code: lifeBar = display.newImage ( "fuel_bar1.png") lifeBar.anchorX = 0 lifeboats. ======================== Lifetime Y = 37 screens Group: The Insert function (called Laifbar) However, I fuel Kansmoshn (equivalent to "pressed" variable to reduce the fuel tank "true") Have used. When pressed == is true, it means that the user is touching the screen: processed (fuel) processed () if life & gt; 0 and pressed == true remains = life - life 1 Life = life =. Wide-1 remains Value.text = string.format ("% d", life) End of this This function is active as the entrance event: runtime: addEventListener ( "Antrfrem" fuel Snsadna) it is very well, but my question is: pressed variable each time 5 seconds (once = = True) How is it possible to reduce the vitality width? I tried to add it to my touch even...
Read more