sharedpreferences non posso cancellarle

[ndrokki]

Salve developers,
non ho il permesso per accedere al file, in quanto mi serve di cancellare le sharedpreferences, internet suggerisce di trovare adb in modo tale da settare i permessi di eclipse cosi da poter vedere da ddms i files( che al momento non posso vedere causa permessi), ma siccome lavoro dall'ufficio non posso andare con cmd.exe in adb causa restrizioni dell'azienda.
esiste un modo per cancellare il file?

mport java.util.List;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Point;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Toast;
import android.os.Build;

public class ImageActivity extends ActionBarActivity implements
		PointCollectorListener {

	private static final String PASSWORD_SET = "PASSWORD_SET";
	private PointCollector pointCollector = new PointCollector();
	private Database db = new Database(this);

 @Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_image);
		Log.d(MainActivity.TAG, "10 On Create go to ");

		addTouchListener();
		showSetPasspointPrompt();
		Log.d(MainActivity.TAG, "20 out from addTouchListener() and showSetPasspointPrompt/l going to the last /n+ method in on create pointCollector.setListener(this);");
		
	
pointCollector.setListener(this);
Log.d(MainActivity.TAG, "35 end instructions on OnCreate.. the program is waiting for a click");

	}

	private void addTouchListener() {
		ImageView image = (ImageView) findViewById(R.id.touch_image);
		image.setOnTouchListener(pointCollector);

	}

	private void showSetPasspointPrompt() {
		AlertDialog.Builder builder = new Builder(this);
		
		builder.setPositiveButton("OK", new OnClickListener() {

		 @Override
			public void onClick(DialogInterface dialog, int which) {
				Toast.makeText(ImageActivity.this, "YEP", Toast.LENGTH_LONG)
						.show();
			}
		});
		builder.setNegativeButton("Cancel", new OnClickListener() {

		 @Override
			public void onClick(DialogInterface dialog, int which) {
				Toast.makeText(ImageActivity.this, "olaaaaa", Toast.LENGTH_LONG)
						.show();

			}
		});

		builder.setTitle("Create your Passpoint sequence");
		builder.setMessage("Touch four poins on the image to set the passpoint sequence");
		AlertDialog dlg = builder.create();

		dlg.show();

	}

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

	private void savePasspoints(final List<Point> points) {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setMessage(R.string.hello_world);

		final AlertDialog dlg = builder.create();
		dlg.show();
		AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {

		 @Override
			protected Void doInBackground(Void... params) {
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				db.storePoints(points);
				Log.d(MainActivity.TAG, "Points saved: " + points.size());
				return null;
			}

			// this code will run when doInBackground finished running
		 @Override
			protected void onPostExecute(Void result) {
				Log.d(MainActivity.TAG, "80 on postexecute AsyncTask");
				SharedPreferences prefs = getPreferences(MODE_PRIVATE);
				SharedPreferences.Editor editor = prefs.edit();
				
			
				
				editor.putBoolean(PASSWORD_SET, true);
				
				
				
				editor.commit();
				
				Log.d(MainActivity.TAG,"editor clean ");
				pointCollector.clear();
				dlg.dismiss();

			}

		};
		// you have to execute all
		task.execute();

		/*
		 * Log.d(MainActivity.TAG, "Collected points:  "+ points.size());
		 * db.storePoints(points); Log.d(MainActivity.TAG, "riuscito ");
		 * List<Point> list= db.getPoints(); for(Point point:list){
		 * Log.d(MainActivity.TAG, String.format("Got Points:(%d,  %d)",
		 * point.x, point.y));
		 */

	}

	private void verifyPasspoints(final List<Point> points) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("checking passpoints...");
		final AlertDialog dlg =builder.create();
		dlg.show();
		AsyncTask<Void, Void, Boolean> task= new AsyncTask<Void, Void, Boolean>(){

		 @Override
			protected Boolean doInBackground(Void... params) {
				//we cannot give instruction for GUI here, no dlg because is a background process.
				return true;
			}

		 @Override
			protected void onPostExecute(Boolean pass) {
				dlg.dismiss();
				pointCollector.clear();
				
				if(pass==true){
					Intent i= new Intent(ImageActivity.this, MainActivity.class);
					startActivity(i);
				}else{
					Toast.makeText(ImageActivity.this, "Access denied.", Toast.LENGTH_LONG).show();
				}
			}
			
			
		};
		task.execute();
		
	}

 @Override
	// make variable final, so cannot assign points
	public void pointsCollected(final List<Point> points) {
		Log.d(MainActivity.TAG, "60 ora sono da pointCollected in ImageActivity");

		SharedPreferences prefs = getPreferences(MODE_PRIVATE);
		
		
		Boolean passpointSet = prefs.getBoolean(PASSWORD_SET, false);
		//prefs.edit().clear().commit();
		
		Log.d(MainActivity.TAG, "70 Sharedpreferences ");
		
		if (!passpointSet) {
			Log.d(MainActivity.TAG, "Saving passpoint..");
			savePasspoints(points);
		} else {
			Log.d(MainActivity.TAG, "Verifying passpoint..");
			///should be verifying passpoints(points)
			verifyPasspoints(points);
		}

	}
}

l altra classe '

public class PointCollector implements OnTouchListener  {
	///makes an array because we have to collect four points every Point has 2 integers inside
	private List<Point> points =new ArrayList<Point>();
	private PointCollectorListener listener;

	public boolean onTouch(View v, MotionEvent event) {
		
int x=Math.round(event.getX());
int  y=Math.round(event.getY());
Log.d(MainActivity.TAG, "40 I am on PointCollector.Ontouch, are you triggering to me, click... and i continue to listen");
String message =String.format("Coordinates: (%d,  %d)",x,y);
Log.d(MainActivity.TAG,message);
points.add(new Point(x,y));

if(points.size()==4){
	if(listener != null){
		Log.d(MainActivity.TAG, " 50 e mo basta ... mi hai cliccato 4 volte e sei entrato nel if points.size=4 che punta a ");


		listener.pointsCollected(points);
		
	}
	
}
return false;
	}

	public void setListener(PointCollectorListener listener) {
		Log.d(MainActivity.TAG, "30 sto nel set setListener(PointCollectorListener listener ..) /l /n gli assegno this.listener to Class PointCollector..and waiting for a touch");
		this.listener = listener;
	}
public void clear(){
	points.clear();
}
}

altra classe e'