Reading from file

Hey guys.

I have to hand in my application for my uni project on Thursday and I have come across a problem.

I need to be able to save the string value from an "editText" when I click on the save button. Then when I re-open the application, the "editText" will automatically retrieve the save file.

I have got the following code so far.

Code (Text):

1. public class AppMain extends Activity {
2.    
3.     TextView textOut;
4.     EditText getInputMain;
5.     String textOutput = textOut.getText().toString();
6.  
7.     @Override
8.     public void onCreate(Bundle savedInstanceState){
9.         super.onCreate(savedInstanceState);
10.         setContentView(R.layout.main_large);
11.        
12.  
13.         FileInputStream fis =openFileInput(textOutput);
14.         ObjectInputStream ois = new ObjectInputStream(fis);
15.         flow f = (Flow) ois.readObject();
16.        
17.         //Save button
18.        
19.         textOut= (TextView)findViewById(R.id.input);
20.         textOut = (EditText) findViewById(R.id.input);
21.         Button saveButton = (Button) findViewById(R.id.saveButton);
22.         saveButton.setOnClickListener(new OnClickListener(){
23.            
24.             public void onClick(View v){
25.                 textOut.toString();
26.                
27.                 //closing the keyboard
28.                 InputMethodManager imm =(InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
29.                 imm.hideSoftInputFromWindow(textOut.getWindowToken(),0);
30.                
31.                 //saving to sd card
32.            
33.                 FileOutputStream fos = openFileOutput(textOutput,Context.MODE_PRIVATE);
34.                 ObjectOutputStream oos = new ObjectOutputStream(fos);
35.                 oos.writeObject(textOut); oos.close();
36.                
37.                                        
38.                                         }
39.                                                             });

A) Is the write to file bit correct?
B) The part where I read from file says that "flow" isn't acceptable. What am I doing wrong?

Cheers guys. I really need help to get this finished by Thursday