来自共享首选项的android数组

Question

我正在尝试迭代共享首选项的集合,并生成HashMaps的ArrayList,但有问题.

SharedPreferences settings = getSharedPreferences(pref, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("key1", "value1");
editor.putString("key2", "value2");

然后我在思考以下几点:

final ArrayList<HashMap<String,String>> LIST = new ArrayList<HashMap<String,String>>();
SharedPreferences settings = getSharedPreferences(pref, 0);
Map<String, ?> items = settings.getAll();
for(String s : items.keySet()){
    HashMap<String,String> temp = new HashMap<String,String>();
    temp.put("key", s);
    temp.put("value", items.get(s));
    LIST.add(temp);
}

这会出现以下错误:

The method put(String, String) in the type HashMap<String,String> is not applicable for the arguments (String, capture#5-of ?)

有一个更好的方法吗？

Answer 1

哈希有正确的想法.Object不是String,因此.toString()是必需的.

final ArrayList<HashMap<String,String>> LIST = new ArrayList<HashMap<String,String>>();
SharedPreferences settings = getSharedPreferences(pref, 0);
Map<String, ?> items = settings.getAll();
for(String s : items.keySet()){
    HashMap<String,String> temp = new HashMap<String,String>();
    temp.put("key", s);
    temp.put("value", items.get(s).toString());
    LIST.add(temp);
}