an example of use runnable loop via handler post delayed

HandlerLoopOnActivity.java

/*
 *  Copyright © 2015-2016. by ceph3us
 *  All Rights Reserved.
 *  www.ceph3us.pl
 */

package pl.ceph3us.android.examples;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;

/**
 * Created by ceph3us on 22.06.16.
 */
public class HandlerLoopOnActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        /** create a handler - needs to be final to use it in anonymous class/method */
        final Handler handler = new Handler();

        /** post to this handler an anonymous class implementing runnable interface */
        handler.post(new Runnable() {

                         /** /////// body of anonymous class //////////// */

                         /** counter */
                         int counter = 0;

                         /** initial delay time in ms */
                         int delay = 5000;

                         /** run method of runnable interface */
                         @Override
                         public void run() {

                             /**  pre method */
                             doPreMethod();

                             boolean wasPlacedInQue = false;

                             /** check if our counter was reached */
                             if (counter <= 10) {

                                 /** try place this anonymous class in messed que with delayed execution of {@var time} seconds */
                                 wasPlacedInQue = handler.postDelayed(this, delay);

                             } else {
                                 /** check if we satisfied some conditions to break execution */
                                 boolean handled = doCounterReachedMethod();
                                 /** if so return and don't execute rest of the code in this method */
                                 if (handled) return;
                                 /** else go with forward execution */
                             }

                             /** check if runnable was places successful in que */
                             if (wasPlacedInQue) {
                                 /** if was do on placed successful method */
                                 doOnPlacedSucceedMethod();
                                 /** else execute on failure method */
                             } else doOnPlacedFailureMethod();

                         }

                         private boolean doCounterReachedMethod() {
                             /**
                              * example check if execution satisfies us
                              * so we can abandon rest of code execution after this method exits
                              * by check if current time in ms is even or odd 
                              * */
                             return (System.currentTimeMillis() % 2) == 0;
                         }

                         private void doOnPlacedFailureMethod() {
                             /** for example log failure of post execution */
                             Log.i("handler", "failure on count" + String.valueOf(counter));
                             /** increase counter */
                             counter++;
                         }

                         private void doOnPlacedSucceedMethod() {
                             /** increases the next execution delay by doubling it */
                             delay = delay * 2;
                         }

                         private void doPreMethod() {
                             /** for example log  successful start of run() execution */
                             Log.i("handler", "runnable was placed successful - count: " + String.valueOf(counter));
                         }
                     }
                
                /** /////// end of body of anonymous class //////////// */

        );

    }
}