Как извлечь данные из сервера parse и расположить в list view так, чтобы все люди видели?

public class TodoActivity extends Activity implements OnItemClickListener {

	private EditText mTaskInput;
	private ListView mListView;
	private TaskAdapter mAdapter;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_todo);

		Parse.initialize(this, "BOcZtetcc86ChvdBZRDCxJuKtufhq4l159kzpZtF", "n6uX0b6fae8ARqI2WL2oGEpgSF1jK3fGCj2Y3k5X");
		ParseAnalytics.trackAppOpened(getIntent());
		ParseObject.registerSubclass(Task.class);

		ParseUser currentUser = ParseUser.getCurrentUser();
		if(currentUser == null){
			Intent intent = new Intent(this, LoginActivity.class);
			startActivity(intent);
			finish();
		}

		mAdapter = new TaskAdapter(this, new ArrayList<Task>());

		mTaskInput = (EditText) findViewById(R.id.task_input);
		mListView = (ListView) findViewById(R.id.task_list);
		mListView.setAdapter(mAdapter);
		mListView.setOnItemClickListener(this);

		updateData();
	}

	public void updateData(){
		ParseQuery<Task> query = ParseQuery.getQuery(Task.class);
		query.whereEqualTo("user", ParseUser.getCurrentUser());
		query.setCachePolicy(CachePolicy.CACHE_THEN_NETWORK);
		query.findInBackground(new FindCallback<Task>() {
			@Override
			public void done(List<Task> tasks, ParseException error) {
				if(tasks != null){
					mAdapter.clear();
					for (int i = 0; i < tasks.size(); i++) {
						mAdapter.add(tasks.get(i));
					}
				}
			}
		});
	}

	public void createTask(View v) {
		if (mTaskInput.getText().length() > 0){
			Task t = new Task();
			t.setACL(new ParseACL(ParseUser.getCurrentUser()));
			t.setUser(ParseUser.getCurrentUser());
			t.setDescription(mTaskInput.getText().toString());
			t.setCompleted(false);
			t.saveEventually();
			mAdapter.insert(t, 0);
			mTaskInput.setText("");
		}
	} 

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.todo, menu);
		return true;
	}

	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.action_logout: 
			ParseUser.logOut();
			Intent intent = new Intent(this, LoginActivity.class);
			startActivity(intent);
			finish();
			return true;
		} 
		return false; 
	}

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
		Task task = mAdapter.getItem(position);
		TextView taskDescription = (TextView) view.findViewById(R.id.task_description);

		task.setCompleted(!task.isCompleted());

		if(task.isCompleted()){
			taskDescription.setPaintFlags(taskDescription.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
		}else{
			taskDescription.setPaintFlags(taskDescription.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG));
		}

		task.saveEventually();
	}

}

public class TaskAdapter extends ArrayAdapter<Task> {
	private Context mContext;
	private List<Task> mTasks;



	public TaskAdapter(Context context, List<Task> objects) {
		super(context, R.layout.task_row_item, objects);
		this.mContext = context;
		this.mTasks = objects;
	}


	public TaskAdapter(Context context, int resource) {
		super(context, resource);
	}


	public View getView(int position, View convertView, ViewGroup parent){
		if(convertView == null){
			LayoutInflater mLayoutInflater = LayoutInflater.from(mContext);
			convertView = mLayoutInflater.inflate(R.layout.task_row_item, null);
		}
		
		Task task = mTasks.get(position);
		
		TextView descriptionView = (TextView) convertView.findViewById(R.id.task_description);
		
		descriptionView.setText(task.getDescription());
		
		if(task.isCompleted()){
			descriptionView.setPaintFlags(descriptionView.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
		}else{
			descriptionView.setPaintFlags(descriptionView.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG));
		}
		
		return convertView;
	}

}

@ParseClassName("Task")
public class Task extends ParseObject{

	public Task(){


	}

	public boolean isCompleted(){
		return getBoolean("completed");
	}
	
	public void setCompleted(boolean complete){
		put("completed", complete);
	}
	
	public String getDescription(){
		return getString("description");
	}
	
	public void setDescription(String description){
		put("description", description);
	}

	public void setUser(ParseUser currentUser) {
		put("user", currentUser);
	}

	public  void getTask(Task task){
        put("Task", task);
    }
}