Is there anyway I can save a List variable to the Androids phone internal or external memory? I know I can save primitive data, yet not sure about this one.
Thanks in advance.
Yes exactly you can only save primitives so you could something like this:
List<String> list = new ArrayList<String>();
list.add("one");
list.add("two");
list.add("three");
StringBuilder csvList = new StringBuilder();
for(String s : list){
csvList.append(s);
csvList.append(",");
}
sharedPreferencesEditor.put("myList", csvList.toString());
Then to create your list
again you would:
String csvList = sharedPreferences.getString("myList");
String[] items = csvList.split(",");
List<String> list = new ArrayList<String>();
for(int i=0; i < items.length; i++){
list.add(items[i]);
}
You could encapsulate this "serializing" into your own class wrapping a list to keep it nice and tidy. Also you could look at converting your list
to JSON
.
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