How to use SharedPreferences to save more than one values?

Question

I am developing a dictionary app. In my app, I assume that user wants to save favourite words. I have decided to use SharedPreferences to save these values

Answer 1

Honeycomb added the putStringSet method, so you could use that if you don't have to support anything less than Honeycomb:

@Override
public void onClick(View v) {
    SharedPreferences faves = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    {
        Set faveSet = faves.getStringSet("favourite");
        faveSet.add(mSelectedDB + "::" + mCurrentWordId + "::" + mCurrentWord + ",");
        SharedPreferences.Editor editor = faves.edit();
        editor.putStringSet("favourite", faveSet);
        editor.commit();
    }
    Log.i(CONTENT_TAG,"Favourite saved!");

    Toast toast = Toast.makeText(ContentView.this, R.string.messageWordAddedToFarvourite, Toast.LENGTH_SHORT);
    toast.show();
}

If you need support for pre-Honeycomb devices, you will have to come up with your own scheme.

One possibility is to store the words as comma-separated values in one preference.

Another is to generate a new key for each new word, "favourite1", "favourite2", "favourite3" and have another preference you use to store the number of words.