问题描述

Sharedprefences存储字符数组

用Sharedprefences存储字符数组，存储信息为名字，把所有的名字都保存起来，我是新手，希望有例子，谢谢~

解决方案

SharedPreferences sp = getSharedPreferences(PREFERENCES_NAME, Context.MODE_APPEND);
Set setUser = sp.getStringSet("setUser", new HashSet());//引号用的是key，自定义的，相当于一个目录
Editor editor = sp.edit();
setUser.add(userName);//userName 就是你要保存的名字信息
editor.commit();

调用的话跟上面第二句一样。

解决方案二：


/***

• 该类定义了需要保存的登录用户信息
• @author hyylj
• */
  public class AccountInfoKeeper {

  private static final String PREFERENCES_NAME = "com_jingweibo_auther_info";

  // extends to auth info
  private static final String KEY_AUTH_ID = "auth_id";
  private static final String KEY_AUTH_PROFILE = "auth_profile";
  private static final String KEY_AUTH_NAME = "auth_name";
  private static final String KEY_AUTH_DESCRIPTION = "auth_description";

  public static void writeAuthInfoToken(Context context,AccountInfoBean token) {

  if(null == context || null == token){
      return;
  }
  
  SharedPreferences sp = context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_APPEND);
  Editor editor = sp.edit();
  
  if(null != token.getAutherId()){
      editor.putString(KEY_AUTH_ID, token.getAutherId());
  }
  if(null != token.getAutherName()){
      editor.putString(KEY_AUTH_NAME, token.getAutherName());
  }
  
  if(null != token.getAutherProfile()){
      editor.putString(KEY_AUTH_PROFILE, token.getAutherProfile());
  }
  
  if(null != token.getAutherDescription()){
      editor.putString(KEY_AUTH_DESCRIPTION, token.getAutherDescription());
  }
  
  editor.commit();
  

  }

  public static AccountInfoBean readAuthInfoToken(Context context){

  if(null == context){
      return null;
  }
  
  SharedPreferences sp = context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_APPEND);
  AccountInfoBean token = new AccountInfoBean();
  
  token.setAutherId(sp.getString(KEY_AUTH_ID, ""));
  token.setAutherName(sp.getString(KEY_AUTH_NAME, ""));
  token.setAutherProfile(sp.getString(KEY_AUTH_PROFILE, ""));
  token.setAutherDescription(sp.getString(KEY_AUTH_DESCRIPTION, ""));
  
  return token;
  

  }

  public static void clear(Context context){
  if(null == context){
  return;
  }

  SharedPreferences sp = context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_APPEND);
  Editor ed =sp.edit();
  ed.clear();
  ed.commit();
  

  }

}

解决方案三：

sharedPreference本身是key－value存储的字典结构，你的需求的话可以考虑使用json或者像我下面的代码这样自定义规则字符串。
为了方便package和unpackage我这里使用了guava。

String[] strNames = {"hyy","kevin","joe","lily","mike"};

        //package
        Joiner stringJoiner = Joiner.on("|").skipNulls();
        String savedStr =  stringJoiner.join(strNames);

        System.out.println(savedStr);

        //save savedStr in sharedpreference

        //unpackage
        Splitter stringSplitter = Splitter.on("|");
        stringSplitter.trimResults();

        Iterable unpackageResult =  stringSplitter.split(savedStr);

        System.out.println(unpackageResult);

解决方案四：

没懂意思，自己太菜鸟了