SharedPreference存储的使用

看一下主要的运行图：

 

输入用户名与密码：

按返回键，重新打开之后

记住了用户名与密码

主要的要源代码：

MainActivity.java

package com.sharedpreference;import android.os.Bundle;import android.app.Activity;import android.content.SharedPreferences;import android.view.Menu;import android.widget.EditText;public class MainActivity extends Activity {public static final String SETTING_INFOS = "SETTING_Infos";public static final String NAME = "NAME";public static final String PASSWORD = "PASSWORD";private EditText f_name;private EditText f_password;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 查找组件f_name = (EditText) this.findViewById(R.id.name);f_password = (EditText) this.findViewById(R.id.password);SharedPreferences settings = getSharedPreferences(SETTING_INFOS, 0);//取出保存的姓名与密码String name = settings.getString(NAME, "");String password = settings.getString(PASSWORD, "");        //将取出的姓名与密码赋给f_name和f_passwordf_name.setText(name);f_password.setText(password);}@Overrideprotected void onStop() {//保存数据应放在调用stop()之前super.onStop();      SharedPreferences settings = getSharedPreferences(SETTING_INFOS, 0);//将用户名和密码保存进去settings.edit().putString(NAME, f_name.getText().toString()).putString(PASSWORD, f_password.getText().toString()).commit();};     @Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.activity_main, menu);return true;}}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"     android:orientation="vertical">    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="用户名："/>        <EditText        android:id="@+id/name"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text=""/>        <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="密码："/>        <EditText        android:id="@+id/password"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text=""        android:password="true"/></LinearLayout>