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安卓Shareprefrence实现记住密码自动登录以及保存在shareprefrence里面数据如何加密解密

2014-03-11 13:05 1096 查看

布局文件：login.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:layout_gravity="center"

android:background="@drawable/login_bg"

android:orientation="vertical" >

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:text="登陆成功，进入用户界面"

android:textColor="#000000"

android:textSize="20sp" />

</LinearLayout>

java代码：LoginActivity.java

package com.wang.activity;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.Window;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.CompoundButton.OnCheckedChangeListener;

import android.widget.EditText;

import android.widget.ImageButton;

import android.widget.Toast;

public class LoginActivity extends Activity {

private EditText userName, passWord;

private CheckBox rem_pw, auto_login;

private Button btn_login;

private ImageButton btnQuit;

private String userNameValue,passwordValue;

private SharedPreferences sp;

private final String MAK = "innoview";

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

//去掉TitleBar

this.requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.login);

//获取shareprefrence里面的数据

sp = this.getSharedPreferences("userInfo",Context.MODE_WORLD_READABLE);

userName = (EditText) findViewById(R.id.et_zh);

passWord = (EditText) findViewById(R.id.et_mima);

rem_pw = (CheckBox) findViewById(R.id.cb_mima);

auto_login = (CheckBox) findViewById(R.id.cb_auto);

btn_login = (Button) findViewById(R.id.btn_login);

btnQuit = (ImageButton)findViewById(R.id.img_btn);

//判断记住密码框状态

if(sp.getBoolean("ISCHECK", false))

{

//记住密码框状态标记为选中

rem_pw.setChecked(true);

try {

userNameValue=sp.getString("USER_NAME", "");

System.out.println("<<<<<<<<<<<<"+"加密后的用户名"+userNameValue);

String username=AESEncryptor.decrypt(MAK,userNameValue);

System.out.println("<<<<<<<<<<<<"+"解密后的用户名"+username);

userName.setText(username);

} catch (Exception e) {

Toast.makeText(LoginActivity.this,"用户名解密异常",Toast.LENGTH_SHORT).show();

e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.

}

String password= null;

try {

passwordValue=sp.getString("PASSWORD", "");

System.out.println("<<<<<<<<<<<<"+"加密后的密码"+passwordValue);

password = AESEncryptor.decrypt(MAK, passwordValue);

System.out.println("<<<<<<<<<<<<"+"解密后的密码"+password);

} catch (Exception e) {

Toast.makeText(LoginActivity.this,"密码解密异常",Toast.LENGTH_SHORT).show();

e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.

}

passWord.setText(password);

//判断自动登录框状态

if(sp.getBoolean("AUTO_ISCHECK", false))

{

//自动登录框状态标记为选中

auto_login.setChecked(true);

Intent intent = new Intent(LoginActivity.this,LogoActivity.class);

LoginActivity.this.startActivity(intent);

}

}

// 用户名：login 秘密：123456

btn_login.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

userNameValue = userName.getText().toString();

passwordValue = passWord.getText().toString();

if(userNameValue.equals("login")&&passwordValue.equals("123456"))

{

Toast.makeText(LoginActivity.this,"登陆成功", Toast.LENGTH_SHORT).show();

//如果记住密码框未选中状态

if(rem_pw.isChecked())

{

Editor editor = sp.edit();

// AESEncryptor.encrypt(userNameValue);

try {

editor.putString("USER_NAME", AESEncryptor.encrypt(MAK,userNameValue));

System.out.println("<<<<<<<<"+"加密后的用户名"+AESEncryptor.encrypt(MAK,userNameValue));

} catch (Exception e) {

Toast.makeText(LoginActivity.this,"用户名加密异常",Toast.LENGTH_SHORT).show();

e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.

}

try {

editor.putString("PASSWORD",AESEncryptor.encrypt(MAK,passwordValue));

System.out.println("<<<<<<<<"+"加密后的密码"+AESEncryptor.encrypt(MAK,passwordValue));

} catch (Exception e) {

Toast.makeText(LoginActivity.this,"密码加密异常",Toast.LENGTH_SHORT).show();

e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.

}

editor.commit();

}

Intent intent = new Intent(LoginActivity.this,LogoActivity.class);

LoginActivity.this.startActivity(intent);

//finish();

}else{

Toast.makeText(LoginActivity.this,"登录失败，用户名或密码错误", Toast.LENGTH_LONG).show();

}

}

});

//标记记住密码框状态

rem_pw.setOnCheckedChangeListener(new OnCheckedChangeListener() {

public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {

if (rem_pw.isChecked()) {

System.out.println("记住密码框未选中状态");

sp.edit().putBoolean("ISCHECK", true).commit();

}else {

System.out.println("记住密码框未选中");

sp.edit().putBoolean("ISCHECK", false).commit();

}

}

});

//标记自动登录框状态

auto_login.setOnCheckedChangeListener(new OnCheckedChangeListener() {

public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {

if (auto_login.isChecked()) {

System.out.println("自动登录功能以启用");

sp.edit().putBoolean("AUTO_ISCHECK", true).commit();

} else {

System.out.println("自动登录已关闭");

sp.edit().putBoolean("AUTO_ISCHECK", false).commit();

}

}

});

btnQuit.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

finish();

}

});

}

}

java代码：AESEncryptor.java(AES加密解密类，说实话小五也看的云里雾里的)

package com.wang.activity;

import javax.crypto.Cipher;

import javax.crypto.KeyGenerator;

import javax.crypto.SecretKey;

import javax.crypto.spec.SecretKeySpec;

import java.security.SecureRandom;

/**

* Created with IntelliJ IDEA.

* User: hld

* Date: 13-12-20

* Time: ��10:47

* To change this template use File | Settings | File Templates.

*/

public class AESEncryptor {

/**

* AES��

*/

public static String encrypt(String seed, String cleartext) throws Exception {

byte[] rawKey = getRawKey(seed.getBytes());

byte[] result = encrypt(rawKey, cleartext.getBytes());

return toHex(result);

}

/**

* AES��

*/

public static String decrypt(String seed, String encrypted) throws Exception {

byte[] rawKey = getRawKey(seed.getBytes());

byte[] enc = toByte(encrypted);

byte[] result = decrypt(rawKey, enc);

return new String(result);

}

private static byte[] getRawKey(byte[] seed) throws Exception {

KeyGenerator kgen = KeyGenerator.getInstance("AES");

SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

sr.setSeed(seed);

kgen.init(128, sr); // 192 and 256 bits may not be available

SecretKey skey = kgen.generateKey();

byte[] raw = skey.getEncoded();

return raw;

}

private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {

SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

Cipher cipher = Cipher.getInstance("AES");

cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

byte[] encrypted = cipher.doFinal(clear);

return encrypted;

}

private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {

SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

Cipher cipher = Cipher.getInstance("AES");

cipher.init(Cipher.DECRYPT_MODE, skeySpec);

byte[] decrypted = cipher.doFinal(encrypted);

return decrypted;

}

public static String toHex(String txt) {

return toHex(txt.getBytes());

}

public static String fromHex(String hex) {

return new String(toByte(hex));

}

public static byte[] toByte(String hexString) {

int len = hexString.length()/2;

byte[] result = new byte[len];

for (int i = 0; i < len; i++)

result[i] = Integer.valueOf(hexString.substring(2*i, 2*i+2), 16).byteValue();

return result;

}

public static String toHex(byte[] buf) {

if (buf == null)

return "";

StringBuffer result = new StringBuffer(2*buf.length);

for (int i = 0; i < buf.length; i++) {

appendHex(result, buf[i]);

}

return result.toString();

}

private final static String HEX = "0123456789ABCDEF";

private static void appendHex(StringBuffer sb, byte b) {

sb.append(HEX.charAt((b>>4)&0x0f)).append(HEX.charAt(b&0x0f));

}

}

java代码：LogoActivity.java

package com.wang.activity;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.Window;

import android.widget.Button;

import android.widget.ProgressBar;

public class LogoActivity extends Activity {

private ProgressBar progressBar;

private Button backButton;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

this.requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.logo);

progressBar = (ProgressBar) findViewById(R.id.pgBar);

backButton = (Button) findViewById(R.id.btn_back);

progressBar.setMax(3000);

Intent intent = new Intent(this, WelcomeAvtivity.class);

LogoActivity.this.startActivity(intent);

backButton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

finish();

}

});

}

}

java代码：WelcomActivity.java

package com.wang.activity;

import android.app.Activity;

import android.os.Bundle;

public class WelcomeAvtivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.welcome);

}

小五奉上源码

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