Para cortar imágenes en pedazos

ImageUtil.java

import java.io.ByteArrayOutputStream;
import java.util.ArrayList;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;

public class ImageUtil {

	private ArrayList<String> imageParts;
	private String imageComplete;
	private int numberOfParts;
	
	public ImageUtil(String imagePath){
		imageComplete = Base64.encodeToString(convertToByteArray(imagePath), Base64.DEFAULT);
		
		numberOfParts=0;
		imageParts=new ArrayList<String>();
		cutImage();
	}
	
	private byte[] convertToByteArray(String imagePath){
		
		Bitmap bm = BitmapFactory.decodeFile(imagePath);
		
		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();  
		bm.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);  
		
		return  outputStream.toByteArray(); 	
	}
	
	private void cutImage(){
		
		long totalSize=imageComplete.length();
		
		int partSize=(int)totalSize/200;
		
		int limitBottom=0;
		int limitTop=partSize;
		
		//Armamos los pedazos
		for(int i=0;i<200;i++){
			//Cortamos una parte 
			String imagePart=imageComplete.substring(limitBottom,limitTop);
			imageParts.add(imagePart);
			
			//Establecemos nuevos limites
			limitBottom=limitBottom+partSize+1;
			limitTop=limitTop+partSize+1;
		}
		
		//Checamos que no haya sobrado una parte
		long longOfParts=200*partSize;
		
		if(longOfParts==totalSize){
			numberOfParts=20;
			return;
		}
		else{
			//Armamos el pedazo faltante
			String imagePart=imageComplete.substring(limitTop+1,(int)totalSize);
			imageParts.add(imagePart);
			numberOfParts=21;
			return;
		}		
	}
	
	public int getNumberOfParts(){
		return numberOfParts;
	}
	
	public String getImagePart(int numberPart){
			return imageParts.get(numberPart);
	}
	
}