nhaarman/MainActivity.java

## MainActivity.java
package com.nhaarman.android2sandbox;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

public class MainActivity extends Activity {

    static int i = 0;
    static boolean done = false;

    private Runnable message = new Runnable() {

        @Override
        public void run() {
            startActivity(new Intent(MainActivity.this, MainActivity.class));
        }
    };

    private Handler handler = new Handler();

    private int mI;

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

        if (savedInstanceState != null) {
            mI = savedInstanceState.getInt("i", i);
        } else {
            mI = i;
        }

        System.out.println("MainActivity@" + Integer.toHexString(this.hashCode()) + " onCreate (" + mI + ")");

        if (i <= 21 && !done) {
            handler.postDelayed(message, 100);
        } else {
            done = true;
        }
    }

    @Override
    public void onBackPressed() {
        System.out.println("MainActivity@" + Integer.toHexString(this.hashCode()) + " onBackPressed");
        i--;
        super.onBackPressed();
    }

    @Override
    protected void onDestroy() {
        handler.removeCallbacks(message);
        System.out.println("MainActivity@" + Integer.toHexString(this.hashCode()) + " onDestroy (" + mI + ")");
        super.onDestroy();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt("i", mI);
    }
}
	package com.nhaarman.android2sandbox;

	import android.app.Activity;
	import android.content.Intent;
	import android.os.Bundle;
	import android.os.Handler;

	public class MainActivity extends Activity {

	static int i = 0;
	static boolean done = false;

	private Runnable message = new Runnable() {

	@Override
	public void run() {
	startActivity(new Intent(MainActivity.this, MainActivity.class));
	}
	};

	private Handler handler = new Handler();

	private int mI;

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

	if (savedInstanceState != null) {
	mI = savedInstanceState.getInt("i", i);
	} else {
	mI = i;
	}

	System.out.println("MainActivity@" + Integer.toHexString(this.hashCode()) + " onCreate (" + mI + ")");

	if (i <= 21 && !done) {
	handler.postDelayed(message, 100);
	} else {
	done = true;
	}
	}

	@Override
	public void onBackPressed() {
	System.out.println("MainActivity@" + Integer.toHexString(this.hashCode()) + " onBackPressed");
	i--;
	super.onBackPressed();
	}

	@Override
	protected void onDestroy() {
	handler.removeCallbacks(message);
	System.out.println("MainActivity@" + Integer.toHexString(this.hashCode()) + " onDestroy (" + mI + ")");
	super.onDestroy();
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);
	outState.putInt("i", mI);
	}
	}