SharedPreferences stores all values in XML file. So, if you want to iterate through all the values stored in it, you could try following code.
public static List getAllValues(Context context) {
    Map values = getPref(context).getAll();
    List prefDataList = new ArrayList();
    for (Map.Entry entry : values.entrySet()) {
        PrefData prefData = new PrefData();
        prefData.key = entry.getKey();
        prefData.value = entry.getValue().toString();
        prefDataList.add(prefData);
    }
    return prefDataList;
}
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In this code PrefData is a model class having two String variables for key and value.
public final class PrefData {
    public String key;
    public String value;
}
	 
		 
		