我如何定期调用API？

Question

I am working in android. I want to draw a comment window. in which I have a list View which shows comment retrieved from a API.

I want to call that API after 30 second again and again so i can show recent comments in my list view.

This is the code which is used to call my API.

   HttpClient hc = new DefaultHttpClient();

HttpGet get = new HttpGet("192.168.1.127/CC/comment");

HttpResponse rp = hc.execute(get);

if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

 Then put values in some text boxes.

}

I want to call this above code again and again after 10 second. Please help me in writing code. Your may give a short example to solve this type of problem. I have very short time and dont have time to search on google so please help how can i call API and change UI periodically ?

Answer 1

I want to call that API after 30 second again and again

You Should use Service with Broadcast receiver .

Service will do your Task in Background but will not provide any UI so you need to register with Broadcast receiver.

Check this Sample , this sample show how to repeat a task and update UI using Service and Broadcast receiver.

Also refer this tutorial for further reference.

Answer 2

You can simple use just following code:

// We need to use this Handler package
import android.os.Handler;

// Create the Handler object (on the main thread by default)
Handler handler = new Handler();
// Define the code block to be executed
private Runnable runnableCode = new Runnable() {
    @Override
    public void run() {
      // Do something here on the main thread
      Log.d("Handlers", "Called on main thread");
      // Repeat this the same runnable code block again another 2 seconds
      // 'this' is referencing the Runnable object
      handler.postDelayed(this, 2000);
    }
};
// Start the initial runnable task by posting through the handler
handler.post(runnableCode);

You can remove the scheduled execution of a runnable with:

// Removes pending code execution

handler.removeCallbacks(runnableCode);

Answer 3

I have solved my problem like this:-

public class ClassName extends Activity

{

            @Override

    public void onCreate(Bundle savedInstance)

    {
        super.onCreate(savedInstance);


        setContentView(R.layout.live_stream_layout);

        handler.post(timedTask);

     private Runnable timedTask = new Runnable(){

      @Override

      public void run() 

               {

            //do your work here for calling API and UI


            handler.postDelayed(timedTask ,2000 );

      }};