CODEWITHSUNDEEP
androidandroid-asynctask
ghostrider
ghostrider

Reputation: 5259

AsyncTask and Activity how to do it

My main application does this: It retrievs data from the internet and has 3 button, when OnClicked, i am going to 3 other screens. because the data loading may be a little slow, I want to use an async Task. This is my sample code for asynctask.

class LoginProgressTask extends AsyncTask {
        @Override
        protected Boolean doInBackground(String... params) {
            try {
                Thread.sleep(4000);  // Do your real work here
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return Boolean.TRUE;   // Return your real result here
        }

        @Override
        protected void onPreExecute() {
            showDialog(AUTHORIZING_DIALOG);
        }

        @Override
        protected void onPostExecute(Boolean result) {
            // result is the value returned from doInBackground
            removeDialog(AUTHORIZING_DIALOG);
        }
}

and this is my sample of my main activity:

public class MainScreen extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MainTheme();
    }
    public void MainTheme(){
         retrieve_data(); //function for getting the data
         ... action with the buttons, onClicks Listener
    }
}

My question is how can I mix those codes in One activity to make it work, becuase I haven't understood AsyncTask. Or what I should return in the doInBackground?

Upvotes: 1

Views: 5965

Answers (3)

Basbous
Basbous

Reputation: 3925

You can use a Service instead of AsyncTask. This will help you.

Upvotes: 0

hqt
hqt

Reputation: 30276

For example, if you have a Button to login, you should do something like this:

Button button; //Here button to go other sreen
public void onCreate(){
  //some business code here
  //notice: you have declare you button to your layout. I don't post it, but maybe you know how to
  button.setOnClickListener(new OnClickListener){
    @Override
    public void onClick(View view){
        LoginProcessTask loginTask = new LoginProcessTask(this);
        login.excute(data of param1);
    }
  }
}

And you should notice that, in your LoginProcessTask, you have wrongly extended it. It must be (just for example):

class LoginProgressTask extends AsyncTask<String, Integer, Integer>{ ......}

Upvotes: 0

AAnkit
AAnkit

Reputation: 27549

I learned it from >> AsynTask link. may be it will helpful to you too, first read the whole example then start applying it on your code.

Upvotes: 1

Related Questions