Disabling Android Home Button (It's not 100% there, but using immersive on KitKat should make it work much better)

DisableHome.java

package com.example.app;

import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.view.WindowManager;

import java.util.Timer;
import java.util.TimerTask;
import java.util.logging.Handler;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            final View decorView = inflater.inflate(R.layout.fragment_main, container, false);

            // Hide both the navigation bar and the status bar.
            // SYSTEM_UI_FLAG_FULLSCREEN is only available on Android 4.1 and higher, but as
            // a general rule, you should design your app to hide the status bar whenever you
            // hide the navigation bar.
            final int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_FULLSCREEN;
            decorView.setSystemUiVisibility(uiOptions);

            decorView.setOnSystemUiVisibilityChangeListener
                    (new View.OnSystemUiVisibilityChangeListener() {
                        @Override
                        public void onSystemUiVisibilityChange(int visibility) {

                            Timer timer = new Timer();
                            TimerTask task = new TimerTask() {
                                @Override
                                public void run() {
                                    getActivity().runOnUiThread(new Runnable() {
                                        @Override
                                        public void run() {
                                            decorView.setSystemUiVisibility(uiOptions);
                                            // Remember that you should never show the action bar if the
                                            // status bar is hidden, so hide that too if necessary.
                                            ActionBar actionBar = getActivity().getActionBar();
                                            actionBar.hide();
                                        }
                                    });
                                }
                            };

                            timer.scheduleAtFixedRate(task, 0, 1);
                        }
                    });

            return decorView;
        }
    }

}