保存数据：
第一种方法
第一步 //定义sp变量
private static final String Temp_Sms="Temp_Sms";
第二步 保存数据在onStop方法处理
protected void onStop(){
super.onStop();
SharedPreferences.Editor editor=getSharedPreferences(Temp_Sms,MODE_PRIVATE).edit();
editor.putString("sms_content",editTextMsg.getText().toString());
editor.apply();
}
第三步 取值调用展示
SharedPreferences sp = getSharedPreferences(Temp_Sms,MODE_PRIVATE);
String content=sp.getString("sms_content", "");
editTextMsg.setText(content);
第二种方法
/**
* 用户数据操作类
*/
public class UserDao {
private static StringUserDaoTable ="Jason"; //这里命名中间随意
private static StringUserInfoObject ="UserInfoObject";
/**
* 获得用户名
*
* @param context
* @return
*/
public static StringgetUserName(Context context) {
SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
String username = preferences.getString("UserName", "");
return username;
}
/**
* 获得密码
*
* @param context
* @return
*/
public static StringgetPassWord(Context context) {
SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
String password = preferences.getString("PassWord", "");
return password;
}
/**
* 是否记住密码
*
* @param context
* @return
*/
public static boolean getRememberPassWord(Context context) {
SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
boolean isRemember = preferences.getBoolean("RememberPassWord", false);
return isRemember;
}
/**
* 保存是否保存密码
*
* @param context
* @param username
* @param password
*/
public static void saveRememberPassWord(Context context, boolean isRemember) {
SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
Editor editor = preferences.edit();
editor.putBoolean("RememberPassWord", isRemember);
editor.commit();
}
/**
* 保存密码
*
* @param context
* @param username
* @param password
*/
public static void saveUserPassWord(Context context, String password) {
SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
Editor editor = preferences.edit();
editor.putString("PassWord", password);
editor.commit();
}
/**
* 保存用户名密码
*
* @param context
* @param username
* @param password
*/
public static void saveUserNamePassWord(Context context, String username, String password) {
SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
Editor editor = preferences.edit();
editor.putString("UserName", username);
editor.putString("PassWord", password);
editor.commit();
}
// /**
// * 保存用户信息
// *
// * @param context
// * @param userinfo
// */
// public static void saveUserInfo(Context context, String userinfo) {
// SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
// Editor editor = preferences.edit();
// editor.putString("UserInfo", userinfo);
// editor.commit();
// }
/**
* 保存用户信息对象
*
* @param context
* @param userinfo
*/
public static void saveUserInfo(Context context, LoginUser userinfo) {
PreferencesService service =new PreferencesService(context);
service.saveObject(UserInfoObject, userinfo);
}
/**
* 获取用户信息对象
*
* @param context
* @return
*/
public static LoginUsergetUserInfoModel(Context context) {
LoginUser model =null;
PreferencesService service =new PreferencesService(context);
model = (LoginUser) service.deSerialization(UserInfoObject);
return model;
}
/**
* 获取用户信息
*
* @param context
* @return
*/
public static StringgetUserInfo(Context context) {
SharedPreferences preferences = context.getSharedPreferences(UserDaoTable, Activity.MODE_PRIVATE);
return preferences.getString("UserInfo", "");
}
}
PreferencesService文件在下面
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.StreamCorruptedException;
import java.util.HashMap;
import java.util.Map;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Base64;
/**
* 轻量级保存工具
*/
public class PreferencesService {
private static SharedPreferencespreferences;
/** 构造器(无参数) */
public PreferencesService() {
}
/** 构造器(有参数) */
public PreferencesService(Context context) {
if (null ==preferences) {
preferences = android.preference.PreferenceManager.getDefaultSharedPreferences(context);
}
}
/** 保存字段 */
public void save(String key, String value) {
Editor edit =preferences.edit();
/** 数据是放在内存中的 */
edit.putString(key, value);
/** 提交方法，把内存中的数据提交到文件中 */
edit.commit();
}
/** 根据key值获取value值 */
public StringgetValue(String key, String defaltValue) {
String object =preferences.getString(key, defaltValue);
return object;
}
/** 保存字段 */
public void save(String key, Boolean value) {
Editor edit =preferences.edit();
/** 数据是放在内存中的 */
edit.putBoolean(key, value);
/** 提交方法，把内存中的数据提交到文件中 */
edit.commit();
}
/** 根据key值获取value值 */
public boolean getValue(String key) {
boolean object =preferences.getBoolean(key, false);
return object;
}
/** 获取保存的字段 */
public MapgetPreferences(String... param) {
Map map =new HashMap();
for (int i =0; i < param.length; i++) {
map.put(param[i], preferences.getString(param[i], ""));
}
return map;
}
/** 将要保存的hashmap集合转化成字符串 */
private StringSceneList2String(HashMap hashmap)throws IOException {
/** 实例化一个ByteArrayOutputStream对象，用来装载压缩后的字节文件。 */
ByteArrayOutputStream byteArrayOutputStream =new ByteArrayOutputStream();
/** 然后将得到的字符数据装载到ObjectOutputStream */
ObjectOutputStream objectOutputStream =new ObjectOutputStream(byteArrayOutputStream);
/** writeObject 方法负责写入特定类的对象的状态，以便相应的 readObject 方法可以还原它 */
objectOutputStream.writeObject(hashmap);
/** 最后，用Base64.encode将字节文件转换成Base64编码保存在String中 */
String SceneListString =new String(Base64.encode(byteArrayOutputStream.toByteArray(), Base64.DEFAULT));
/** 关闭objectOutputStream */
objectOutputStream.close();
return SceneListString;
}
/** 将字符串转化成hashmap集合 */
private HashMapString2SceneList(String SceneListString)throws StreamCorruptedException, IOException, ClassNotFoundException {
byte[] mobileBytes = Base64.decode(SceneListString.getBytes(), Base64.DEFAULT);
ByteArrayInputStream byteArrayInputStream =new ByteArrayInputStream(mobileBytes);
ObjectInputStream objectInputStream =new ObjectInputStream(byteArrayInputStream);
@SuppressWarnings("unchecked")
HashMap SceneList = (HashMap) objectInputStream.readObject();
objectInputStream.close();
return SceneList;
}
/** 存储集合对象 */
public boolean putHashMap(String key, HashMap hashmap) {
Editor editor =preferences.edit();
try {
String liststr = SceneList2String(hashmap);
editor.putString(key, liststr);
}catch (IOException e) {
return false;
}
return editor.commit();
}
/** 获取集合对象 */
public HashMapgetHashMap(String key) {
String liststr =preferences.getString(key, "");
try {
return String2SceneList(liststr);
}catch (Exception e) {
return null;
}
}
/** 反序列化对象(获取序列化对象) */
public ObjectdeSerialization(String key) {
String seria =preferences.getString(key, null);
Object object;
try {
String redStr = java.net.URLDecoder.decode(seria, "UTF-8");
ByteArrayInputStream byteArrayInputStream =new ByteArrayInputStream(redStr.getBytes("ISO-8859-1"));
ObjectInputStream objectInputStream =new ObjectInputStream(byteArrayInputStream);
object = objectInputStream.readObject();
objectInputStream.close();
byteArrayInputStream.close();
}catch (Exception e) {
return null;
}
return object;
}
/** 序列化对象 */
private Stringserialize(Object object) {
ByteArrayOutputStream byteArrayOutputStream =new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream;
String serStr;
try {
objectOutputStream =new ObjectOutputStream(byteArrayOutputStream);
objectOutputStream.writeObject(object);
serStr = byteArrayOutputStream.toString("ISO-8859-1");
serStr = java.net.URLEncoder.encode(serStr, "UTF-8");
objectOutputStream.close();
byteArrayOutputStream.close();
}catch (IOException e) {
return null;
}
return serStr;
}
/** 保存序列化对象 */
public boolean saveObject(String key, Object object) {
String strObject = serialize(object);
Editor edit =preferences.edit();
edit.putString(key, strObject);
return edit.commit();
}
}
网友评论