Android 永久化保持客户端和服务器连接cookieStore

定义一个工具类：有详细注释

package com.apicloud.A6970406947389.utils;

import java.util.Locale;


        import java.util.Locale;
        import android.content.Context;
        import android.content.SharedPreferences;
        import android.text.TextUtils;
        import android.util.Log;

import com.mechat.loopj.android.http.SerializableCookie;

import org.apache.http.client.CookieStore;
        import org.apache.http.cookie.Cookie;

        import java.io.ByteArrayInputStream;
        import java.io.ByteArrayOutputStream;
        import java.io.ObjectInputStream;
        import java.io.ObjectOutputStream;
        import java.util.ArrayList;
        import java.util.Date;
        import java.util.List;
        import java.util.Locale;
        import java.util.concurrent.ConcurrentHashMap;

public class PersistentCookieStore implements CookieStore {
    private static final String LOG_TAG = "PersistentCookieStore";
    private static final String COOKIE_PREFS = "CookiePrefsFile";
    private static final String COOKIE_NAME_STORE = "names";
    private static final String COOKIE_NAME_PREFIX = "cookie_";
    private boolean omitNonPersistentCookies = false;

    private final ConcurrentHashMap, Cookie> cookies;
    private final SharedPreferences cookiePrefs;

    /**
     * 构建一个持久的cookie store.
     *
     * @param context Context to attach cookie store to
     */
    public PersistentCookieStore(Context context) {
        cookiePrefs = context.getSharedPreferences(COOKIE_PREFS, 0);
        cookies = new ConcurrentHashMap, Cookie>();

        // 加载任何先前储存的cookies到stare
        String storedCookieNames = cookiePrefs.getString(COOKIE_NAME_STORE, null);
        if (storedCookieNames != null) {
            String[] cookieNames = TextUtils.split(storedCookieNames, ",");
            for (String name : cookieNames) {
                String encodedCookie = cookiePrefs.getString(COOKIE_NAME_PREFIX + name, null);
                if (encodedCookie != null) {
                    Cookie decodedCookie = decodeCookie(encodedCookie);
                    if (decodedCookie != null) {
                        cookies.put(name, decodedCookie);
                    }
                }
            }

            // 清除过期的cookie
//            clearExpired(new Date());
        }
    }
    //添加cookie时调用
    @Override
    public void addCookie(Cookie cookie) {
        if (omitNonPersistentCookies && !cookie.isPersistent())
            return;
        String name = cookie.getName() + cookie.getDomain();

        // Save cookie into local store, or remove if expired
        if (!cookie.isExpired(new Date())) {
            cookies.put(name, cookie);
        } else {
            cookies.remove(name);
        }

        // Save cookie into persistent store
        SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
        prefsWriter.putString(COOKIE_NAME_STORE, TextUtils.join(",", cookies.keySet()));
        prefsWriter.putString(COOKIE_NAME_PREFIX + name, encodeCookie(new
                SerializableCookie(cookie)));
        prefsWriter.commit();
    }

    @Override
    public void clear() {
        // Clear cookies from persistent store
        SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
        for (String name : cookies.keySet()) {
            prefsWriter.remove(COOKIE_NAME_PREFIX + name);
        }
        prefsWriter.remove(COOKIE_NAME_STORE);
        prefsWriter.commit();

        // Clear cookies from local store
        cookies.clear();
    }

    @Override
    public boolean clearExpired(Date date) {
        boolean clearedAny = false;
        SharedPreferences.Editor prefsWriter = cookiePrefs.edit();

        for (ConcurrentHashMap.Entry, Cookie> entry : cookies.entrySet()) {
            String name = entry.getKey();
            Cookie cookie = entry.getValue();
            if (cookie.isExpired(date)) {
                // Clear cookies from local store
                cookies.remove(name);

                // Clear cookies from persistent store
                prefsWriter.remove(COOKIE_NAME_PREFIX + name);

                // We've cleared at least one
                clearedAny = true;
            }
        }

        // Update names in persistent store
        if (clearedAny) {
            prefsWriter.putString(COOKIE_NAME_STORE, TextUtils.join(",", cookies.keySet()));
        }
        prefsWriter.commit();

        return clearedAny;
    }

    /**
     * 强信息保存到本地
     * @return
     */
    @Override
    public List getCookies() {
        return new ArrayList(cookies.values());
    }

    /**
     * 将persistentcookiestore实例忽略cookie，这是非持续性的
     * signature (`Cookie.isPersistent`)
     *
     * @param omitNonPersistentCookies true if non-persistent cookies should be omited
     */
    public void setOmitNonPersistentCookies(boolean omitNonPersistentCookies) {
        this.omitNonPersistentCookies = omitNonPersistentCookies;
    }

    /**
     * 非标准辅助方法，删除cookie
     *
     * @param cookie cookie to be removed
     */
    public void deleteCookie(Cookie cookie) {
        String name = cookie.getName();
        cookies.remove(name);
        SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
        prefsWriter.remove(COOKIE_NAME_PREFIX + name);
        prefsWriter.commit();
    }

    /**
     * Cookie对象序列化字符串
     *
     * @param cookie cookie to be encoded, can be null
     * @return cookie encoded as String
     */
    protected String encodeCookie(SerializableCookie cookie) {
        if (cookie == null)
            return null;
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        try {
            ObjectOutputStream outputStream = new ObjectOutputStream(os);
            outputStream.writeObject(cookie);
        } catch (Exception e) {
            return null;
        }

        return byteArrayToHexString(os.toByteArray());
    }

    /**
     * 从cookie字符串中返回的cookie
     *
     * @param cookieString string of cookie as returned from http request
     * @return decoded cookie or null if exception occured
     */
    protected Cookie decodeCookie(String cookieString) {
        byte[] bytes = hexStringToByteArray(cookieString);
        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
        Cookie cookie = null;
        try {
            ObjectInputStream objectInputStream = new ObjectInputStream(byteArrayInputStream);
            cookie = ((SerializableCookie) objectInputStream.readObject()).getCookie();
        } catch (Exception exception) {
            Log.d(LOG_TAG, "decodeCookie failed", exception);
        }

        return cookie;
    }

    /**
     * 使用一些超级基本字节数组< - >十六进制转换，所以我们不必依赖于任何

     *大Base64图书馆。如果你喜欢的话，可以重写！
     *
     * @param bytes byte array to be converted
     * @return string containing hex values
     */
    protected String byteArrayToHexString(byte[] bytes) {
        StringBuilder sb = new StringBuilder(bytes.length * 2);
        for (byte element : bytes) {
            int v = element & 0xff;
            if (v < 16) {
                sb.append('0');
            }
            sb.append(Integer.toHexString(v));
        }
        return sb.toString().toUpperCase(Locale.US);
    }

    /**
     * 从字符串的字节转换成十六进制值数组
     *
     * @param hexString string of hex-encoded values
     * @return decoded byte array
     */
    protected byte[] hexStringToByteArray(String hexString) {
        int len = hexString.length();
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            data[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4) + Character.digit(hexString.charAt(i + 1), 16));
        }
        return data;
    }
}

xutils保存的时候用：

DefaultHttpClient dh = (DefaultHttpClient) http.getHttpClient();
MyCookieStore.cookieStore = dh.getCookieStore();
 CookieStore cs = dh.getCookieStore();
List cookies = cs.getCookies();
PersistentCookieStore per = BaseActivity.getInstance().getPersistentCookieStore();
for (Cookie cookie: cookies) {
    per.addCookie(cookie);

}

纯手动保存的时候：

    PersistentCookieStore myCookieStore = App.getInstance().getPersistentCookieStore();  
    List cookies = httpClient.getCookieStore().getCookies();  
    for (Cookie cookie:cookies){  
        myCookieStore.addCookie(cookie);  
    }  

xtuils在需要的地方调用：

    PersistentCookieStore cookieStore = new PersistentCookieStore(BaseActivity.getInstance().getApplicationContext());
        PersistentCookieStore cookieStore = new PersistentCookieStore(QianDaoActivity.this);
        httpUtils.configCookieStore(cookieStore);

纯手动早需要的地方调用：

    PersistentCookieStore cookieStore = new PersistentCookieStore(SmthBestApp.getInstance().getApplicationContext());  
    httpClient.setCookieStore(cookieStore);  
    HttpResponse response = httpClient.execute(httpget);  

有时候会报空指针，将

SmthBestApp.getInstance().getApplicationContext()

改成Activity对象即可。

public static PersistentCookieStore getPersistentCookieStore(){
    PersistentCookieStore persistentCookieStore = new PersistentCookieStore(getApplication());
    return persistentCookieStore;
}