Question

I am trying to save ArrayLists(ArrayOne, ArrayTwo, and ArrayThree) of EditText’s to the internal storage. As commented, it clearly shows that it attempts the save, but I never get another TOAST after that. Any help as of why it doesn’t show “Save completed” or any error is appreciated.

public void save(Context c)
{
    String fileName;
    Toast.makeText(this, "Attempting Save", Toast.LENGTH_SHORT).show();//THIS SHOWS
    if(semester.getText().toString().length() == 0)
    {
        Toast.makeText(c, "Please enter a filename", Toast.LENGTH_SHORT).show();
    }
    else
    {
        fileName = "test.dat";
        FileOutputStream fos = null;
        ObjectOutputStream oos = null;
        try 
        {
            fos = this.openFileOutput(fileName, Context.MODE_PRIVATE);
            oos = new ObjectOutputStream(fos);
            oos.writeObject(ArrayOne);
            oos.writeObject(ArrayTwo);
            oos.writeObject(ArrayThree);
            Toast.makeText(c, "Save Completed", Toast.LENGTH_SHORT).show(); //THIS NEVER SHOWS
        } 
        catch (FileNotFoundException e) 
        {
            Toast.makeText(c, "Could not find " + fileName + " to save.", Toast.LENGTH_SHORT).show();
            e.printStackTrace();
        } 
        catch (IOException e)
        {
            e.printStackTrace();
        } 
        finally 
        {
            try 
            {
                if (oos != null)
                    oos.close();
                if (fos != null)
                    fos.close();
            } 
            catch (Exception e)
            { /* do nothing */ }
        }
    }
}

Answer 1

The problem is that the EditText class is not serializable

If you debug and put a break point at on the printStackTrace and examine the IOException it will tell you that

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

Classes have to use “implements Serializable” in order for them to be written out as objects, which EditText does not have.

You can not extend the class and add the serializable tag either because the underlying class will still throw the exception.

I suggest you either serialize the data via your own class or save whatever you are trying to do with some other method.