How to create a sequence of pictures

[Damiano Fossa]

Hi eveyone!
I'm doing an application in which I have to show a sequence of pictures: The sequence is the follow:

1. A red X has to be shown for more or less 400 milliseconds;
2. An image called "Screenshot" has to be shown for more or less 500 milliseconds;
3. An image called "Noise" has to be shown for more or less 50 milliseconds;
4. The "Noise" image disappear to make space for an EditText.

class TaskScreenshot implements Runnable{
   @Override public void run() {
      myImageView.setImageResource(R.drawable.googleplaybooks2);
      myImageView.getLayoutParams().width = LayoutParams.MATCH_PARENT;
      myImageView.getLayoutParams().height = LayoutParams.MATCH_PARENT;
   }
}

class TaskNoise implements Runnable{
   @Override public void run() {
      myImageView.setImageResource(R.drawable.noise);
      myImageView.getLayoutParams().width = LayoutParams.MATCH_PARENT;
      myImageView.getLayoutParams().height = LayoutParams.MATCH_PARENT;
   }
}

class TaskEditText implements Runnable{
   @Override public void run() {
      myEditText.setVisibility(View.VISIBLE);
      myImageFragment.getView().setVisibility(View.GONE);
   }
}


///////////////////////////////////////////////////


handler.postDelayed(new TaskScreenshot(i), 250);
handler.postDelayed(new TaskNoise(), 750);
handler.postDelayed(new TaskEditText(), 1000);

Now, I have to repeat this sequence for a specific number of times. How can I do that? Do I have to use a loop?
Thanks!

[Damiano Fossa]

I've updated the code:

public class Step1Training extends Activity {
	
	ImageFragment myImageFragment;
	InputFragment myInputFragment;
	Drawable cross;
	ImageView myImageView;
	EditText myEditText;
	Button continueButton;
	int length;
	int i = 0;
	String rating;
	Handler handler;
	boolean continueTask;
	int[] screenshots = {
		   R.drawable.googleplaybooks2,
		   R.drawable.aldiko1,
		   R.drawable.chaton2,
		   R.drawable.cinetrailer1,
		   R.drawable.fanpage1
	};
	String filePATH;
	Intent intent;
	File root;
	boolean fileDeleted;
	TextHandler textHandler;
	int participantID;
		
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.step1_training);
		
		fileDeleted = false;
		root = Environment.getExternalStorageDirectory();
		textHandler = new TextHandler();
		intent = getIntent();
		filePATH = intent.getStringExtra("file_path");
		participantID = intent.getIntExtra("participant_ID", participantID);
		System.out.println(filePATH);
		System.out.println(participantID);
		
		handler = new Handler();
		length = screenshots.length;
		
		initUI();
		
		startThread();
		
		addListenerOnContinueButton();
	}
	
	private void initUI(){
		myImageFragment = (ImageFragment)getFragmentManager().findFragmentById(R.id.imageFragment);
		myInputFragment = (InputFragment)getFragmentManager().findFragmentById(R.id.inputFragment);
		
		myImageView = (ImageView)myImageFragment.getView().findViewById(R.id.screenshotImageView);
		myImageView.setImageResource(R.drawable.cross300x300);
		
		continueButton = (Button) myInputFragment.getView().findViewById(R.id.continueButton);
		continueButton.setVisibility(View.GONE);
		
		myEditText = (EditText) myInputFragment.getView().findViewById(R.id.ratingEditText);
		myEditText.setText("");
		myEditText.setOnKeyListener(new OnKeyListener(){
     		public boolean onKey(View arg0, int arg1, KeyEvent event) {
     	        // If the event is a key-down event on the "enter" button
     	        if ( (event.getAction() == KeyEvent.ACTION_DOWN  ) &&
     	             (arg1           == KeyEvent.KEYCODE_ENTER)   )
     	        {               
     	        	InputMethodManager imm = (InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
     	                imm.hideSoftInputFromWindow(myEditText.getWindowToken(), 0);   
     	                return true;
     	        }
     	        return false;
     	     }
     	});
		
		myEditText.setVisibility(View.GONE);
		myEditText.setOnKeyListener(null);
	}
	
	private void startThread(){
			handler.postDelayed(new TaskScreenshot(0), 300);
	      	handler.postDelayed(new TaskNoise(), 800);
	      	handler.postDelayed(new TaskEditText(), 1050);
	      	
	      	myEditText.setOnKeyListener(new View.OnKeyListener(){
	      		public boolean onKey(View v, int keyCode, KeyEvent event) {
	                if((keyCode == KeyEvent.KEYCODE_ENTER)) {
	                    if(myEditText.getText().toString().equals("")){
	                    	Toast.makeText(getApplicationContext(), "Inserire un numero da 1 a 9", Toast.LENGTH_SHORT).show();
	                    	return false;
	                    } else if (Integer.parseInt(myEditText.getText().toString()) >= 1 &&
	                    		Integer.parseInt(myEditText.getText().toString()) <= 9){
	                    	// System.out.println(i);
	            	      	startThread2(i+1);
	                    	return true;
	                    }
	                }
	                return false;
	            }
	      	});
	}
	
	private void startThread2(final int i){
		
		if(i < length){
			handler.postDelayed(new TaskCross(), 300);
			handler.postDelayed(new TaskScreenshot(i), 600);
	      	handler.postDelayed(new TaskNoise(), 1100);
	      	handler.postDelayed(new TaskEditText(), 1350);
      	
	      	myEditText.setOnKeyListener(new View.OnKeyListener(){
	      		public boolean onKey(View v, int keyCode, KeyEvent event) {
	                if((keyCode == KeyEvent.KEYCODE_ENTER)) {
	                    if(myEditText.getText().toString().equals("")){
	                    	Toast.makeText(getApplicationContext(), "Inserire un numero da 1 a 9", Toast.LENGTH_SHORT).show();
	                    	return false;
	                    } else if (Integer.parseInt(myEditText.getText().toString()) >= 1 &&
	                    		Integer.parseInt(myEditText.getText().toString()) <= 9){
	                    	System.out.println(i);
	            	      	startThread2(i+1);
	            	      	if(i == length-1 && myEditText.getVisibility() == View.VISIBLE){
	            				continueButton.setVisibility(View.VISIBLE);
	            			}
	                    	return true;
	                    }
	                }
	                return false;
	            }
	      	});	      	
		}
	}
	
	private void addListenerOnContinueButton() {
			 
		continueButton.setOnClickListener(new OnClickListener() {
 
			@Override
			public void onClick(View arg0) {
				Intent intent = new Intent(Step1Training.this, MainSession1.class);
				intent.putExtra("file_path", filePATH);
				intent.putExtra("participand_ID", participantID);
				startActivity(intent);
			} 
		});
	}
	
	@Override
	public void onBackPressed() {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Attenzione")
        .setMessage("Sei sicuro/a di voler uscire dall'applicazione?\n" +
        		"Confermando uscirai dall'applicazione e perderai \n" +
        		"tutti i dati raccolti finora.")
        .setCancelable(false)
        .setNegativeButton("No",new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                dialog.cancel();
            }
        })
        .setPositiveButton("Si", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int whichButton)
            {
            	fileDeleted = textHandler.deleteFile(filePATH);
            	if(fileDeleted){
            		System.out.println("CANCELLATO!!");
            	} else {
            		System.out.println("NON CANCELLATO!!");
            	}
            	Intent intent = new Intent(Intent.ACTION_MAIN);
            	intent.addCategory(Intent.CATEGORY_HOME);
            	intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            	startActivity(intent);
            }
        });
        AlertDialog alert = builder.create();
        alert.show();
	}
	
	class TaskScreenshot implements Runnable{

		int j;
		
		public TaskScreenshot(int _i){
			this.j = _i;
		}
		
		@Override
		public void run() {
			System.out.println("Screenshot");
			myEditText.setText("");
			myEditText.setVisibility(View.GONE);
			myImageFragment.getView().setVisibility(View.VISIBLE);
	        myImageView.setImageResource(screenshots[j]);
			myImageView.getLayoutParams().width = LayoutParams.MATCH_PARENT;
			myImageView.getLayoutParams().height = LayoutParams.MATCH_PARENT;
		}
	}
	
	class TaskNoise implements Runnable{
		
		@Override
		public void run() {
			System.out.println("Noise");
        	myImageView.setImageResource(R.drawable.noise);
        	myImageView.getLayoutParams().width = LayoutParams.MATCH_PARENT;
			myImageView.getLayoutParams().height = LayoutParams.MATCH_PARENT;
		}
	}
	
	class TaskEditText implements Runnable{

		@Override
		public void run() {
			System.out.println("EditText");
			myEditText.setVisibility(View.VISIBLE);
	        myImageFragment.getView().setVisibility(View.GONE);
		}
	}
	
	class TaskCross implements Runnable{

		@Override
		public void run() {
			System.out.println("Cross");
			myEditText.setVisibility(View.GONE);
			myImageFragment.getView().setVisibility(View.VISIBLE);
			myImageView.getLayoutParams().width = 60;
			myImageView.getLayoutParams().height = 60;
			myImageView.setImageResource(R.drawable.cross300x300);
		}
	}
}

But, if I have 5 pictures, it shows the first, the third and the fifth image. Why? Am I doing something wrong the index?