i need to return variables from a class

public class Map extends Activity {
	private NotificationManager nm;
	private int UniqueID = 100;

	private ImageView selectedImage;
	private Bitmap currentImage;
	float xval;
	float yval;
	float xx1, xx2, xx3, yy1, yy2, yy3;
	// TextView width,height;

	JSONObject json;
	// Progress Dialog
	private ProgressDialog pDialog;

	// JSON parser class
	JSONParser jsonParser = new JSONParser();

	private static final String LOGIN_URL = "http://www.digiassistant.comuf.com/get/getbeacon.php"; // change
	// to

	private static final String TAG_SUCCESS = "success";
	private static final String TAG_MESSAGE = "message";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.map);
		selectedImage = (ImageView) findViewById(R.id.selectedImage);
		nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		int width = 500;
		int height = 600;
		LinearLayout.LayoutParams parms = new LinearLayout.LayoutParams(width,
				height);
		selectedImage.setLayoutParams(parms);

		new AttemptLogin().execute();
		// width=(TextView)findViewById(R.id.t1);
		// height=(TextView)findViewById(R.id.t2);
		// int x= Integer.valueOf((String) width.getText());

		// int x = Integer.parseInt(width.getText().toString());
		// height.setText(""+x);
		// int x=10;
		// int y=5;

		Button openGallery = (Button) findViewById(R.id.opengallery);

		MyCustomPanel view = new MyCustomPanel(this);

		ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
				LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
		addContentView(view, params);

		openGallery.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
				photoPickerIntent.setType("image/*");
				startActivityForResult(photoPickerIntent, 1);
			}
		});
	}

	// public void open_gal(View view){
	//
	//
	// Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
	// photoPickerIntent.setType("image/*");
	// startActivityForResult(photoPickerIntent, 1);
	//
	//
	//
	// }

	private class MyCustomPanel extends View {

		public MyCustomPanel(Context context) {
			super(context);

		}

		@Override
		public void draw(Canvas canvas) {

			Paint paint = new Paint();
			paint.setColor(Color.GREEN);
			paint.setStrokeWidth(50);

			paint.setColor(Color.RED);

			// canvas.drawLine(50, 50, 90, 10, paint);
			// canvas.drawCircle(50, 50, 3, paint);

			// if (x > 500 || x<0 || y<120 || y >710 ){

			// Toast.makeText(Map.this,
			// "Outer the Area",Toast.LENGTH_SHORT).show();
			// displayNotification();

			// }
			// else{

			canvas.drawCircle(x, y, 10, paint);
			// }

		}
	}

	// /
	class AttemptLogin extends AsyncTask<string,> {

		/**
		 * Before starting background thread Show Progress Dialog
		 * */
		boolean failure = false;

		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			pDialog = new ProgressDialog(Map.this);
			pDialog.setMessage("Attempt login...");
			pDialog.setIndeterminate(false);
			pDialog.setCancelable(true);
			pDialog.show();
		}

		@Override
		protected String doInBackground(String... args) {
			SharedPreferences sharedpreferences = getSharedPreferences(
					Login.MyPREFERENCES, Context.MODE_PRIVATE);

			String username = sharedpreferences.getString(Login.name, null);

			// Check for success tag
			int success;
			// String username = user.getText().toString();

			try {
				// Building Parameters
				List<namevaluepair> params = new ArrayList<namevaluepair>();
				params.add(new BasicNameValuePair("username", username));

				Log.d("request!", "starting");
				// getting product details by making HTTP request
				json = jsonParser.makeHttpRequest(LOGIN_URL, "POST", params);

				// check your log for json response
				Log.d("Login attempt", json.toString());

				// json success tag
				success = json.getInt(TAG_SUCCESS);
				if (success == 1) {
					Log.d("Login Successful!", json.toString());

					return json.getString(TAG_MESSAGE);
				} else {
					Log.d("Login Failure!", json.getString(TAG_MESSAGE));
					return json.getString(TAG_MESSAGE);

				}
			} catch (JSONException e) {
				e.printStackTrace();
			}

			return null;

		}

		/**
		 * After completing background task Dismiss the progress dialog
		 * **/
		protected void onPostExecute(String file_url) {
			// dismiss the dialog once product deleted
			pDialog.dismiss();
			try {

				JSONArray user = json.getJSONArray("user");
				JSONObject jb = user.getJSONObject(0);
				float xx1 = jb.getLong("xx1");

				float xx2 = jb.getLong("xx2");
				float xx3 = jb.getLong("xx3");
				float yy1 = jb.getLong("yy1");
				float yy2 = jb.getLong("yy2");
				float yy3 = jb.getLong("yy3");

				// displaying all data in textview

				// Getbeacon.this.xx1.setText("" + a);
				// Getbeacon.this.xx2.setText("" + xx2);
				// Getbeacon.this.xx3.setText("" + xx3);
				// Getbeacon.this.yy1.setText("" + yy1);
				// Getbeacon.this.yy2.setText("" + yy2);
				// Getbeacon.this.yy3.setText("" + yy3);

			} catch (Exception e) {
				e.printStackTrace();
			}
			if (file_url != null) {
				Toast.makeText(Map.this, file_url, Toast.LENGTH_LONG).show();
			}

		}