Alterar imagens no Layout Perioticamente

public class MainActivity extends Activity {
    private Timer timerAtual = new Timer();
    private TimerTask task;
    private final Handler handler = new Handler();
    private int troca,click;
    private OnClickListener ocl1,ocl2,oc3;
    
	private ImageView 1;
	private ImageView 2;
	private ImageView 3;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		1 = (ImageView)findViewById(R.id.territorio);
		2     = (ImageView)findViewById(R.id.video);
		3  = (ImageView)findViewById(R.id.historia);
        
		oclChamar1 = new OnClickListener() {
			@Override
			public void onClick(View arg0) {
				Intent intent1= new Intent();
				intent1.setClassName("br.com.teste", "br.com.teste.TerritorioActivity");
				click = 1;
				startActivity(intent1);
			}
		};
        
		ocl2 = new OnClickListener() {
			@Override
			public void onClick(View arg0) {
				Intent intent2 = new Intent();
				intent2.setClassName("br.com.teste", "br.com.teste.VideoActivity");
				click = 1;
				startActivity(intent2);
			}
		};
        
		oclChamar3 = new OnClickListener(){
			@Override
			public void onClick(View arg0) {
				Intent intent3 = new Intent();
				intent3.setClassName("br.com.teste", "br.com.teste.HistoriaActivity");
				click = 1;
				startActivity(intent3);
			}
		};
		
		1.setOnClickListener(oclChamar1);
		2.setOnClickListener(oclChamar2);
		3.setOnClickListener(oclChamar3);
		ativaTimer();
	}
	
    private void ativaTimer(){
        task = new TimerTask() {
           public void run() {
               handler.post(new Runnable() {
	   	            public void run() {
	   	            	if(click != 1){
	   	                Log.d("Debug", "Vai Corintiaaa");
		   	                if(troca == 1){
		   	                	setContentView(R.layout.activity_main_second);
	                    		                    	        1.setOnClickListener(oclChamar1);
		                                               		2.setOnClickListener(oclChamar2);
		                                               		3.setOnClickListener(oclChamar3);
		   	                	troca = 0;
		   	                }else{
		   	                	setContentView(R.layout.activity_main);
  			   	         		       1.setOnClickListener(oclChamar1);
		                                               2.setOnClickListener(oclChamar2);
			                                       3.setOnClickListener(oclChamar3);
		   	                	troca = 1;
		   	                }
	   	                
	   	            	}
	   	            }
               });
            }};
        timerAtual.schedule(task, 8000, 8000);
     }
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

ImageView.setImageResource(int resId)