程序间保存数据SharedPreferences

SharedPreferences sp = getSharedPreferences("config", MODE_PRIVATE);
String cacheToken = sp.getString("loginToken", "");

if (!TextUtils.isEmpty(cacheToken))｛
//为空

｝

SharedPreferences sp = getSharedPreferences("config", MODE_PRIVATE);
SharedPreferences.Editor editor=sp.edit();
editor.putString("language",language);
editor.apply();