
1、sharedPreference保存数据
package com.example.login.service; import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map; import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor; public class LoginService {
public static void savaUserInfo(Context context, String username, String password)
{
SharedPreferences sp = context.getSharedPreferences("config", context.MODE_PRIVATE);
//获得一个sp编辑器
Editor editor = sp.edit();
editor.putString("username", username);
editor.putString("password", password);
//相当于事务的提交
editor.commit();
} }
2、sharedPreference读取数据
SharedPreferences sp = getSharedPreferences("config", MODE_PRIVATE);
String username = sp.getString("username", "");
String password = sp.getString("password", "");