Thread, Runnable, Handler, AsyncTask

gistfile1.java

public class BlehActivity extends Activity {
  private Handler handler;
  private ProgressBar progress;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    progress = (ProgressBar) findViewById(R.id.progressBar1);
    handler = new Handler();
  }

  public void startProgress(View view) {
    // Do something long
    Runnable runnable = new Runnable() {
      @Override
      public void run() {
        for (int i = 0; i <= 10; i++) {
          final int value = i;
          try {
            Thread.sleep(2000);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
          handler.post(new Runnable() {
            @Override
            public void run() {
              progress.setProgress(value);
            }
          });
        }
      }
    };
    new Thread(runnable).start();
  }
} 

gistfile2.java

//Sequence timed events

class Task1 implements Runnable{
    public void run(){
        //perform task 1
        handler.postDelayed(new Task2(), 2000);
    }
}

class Task2 implements Runnable{
    public void run(){
        //perform task 2
    }
}

//now start the first task

handler.post(new Task1());

gistfile3.java

class Async extends AsyncTask<String, Void, String> {
	public Async() {
	}
	@Override
	protected void onPreExecute() {
	}
	@Override
	protected String doInBackground(String... params) {
		return "";
	}
	@Override
	protected void onPostExecute(String result) {
	}
	@Override
	protected void onProgressUpdate(Void... values) {
	}
}