Diff: dcs-sdk-java-master/app/src/main/java/com/baidu/duer/dcs/oauth/api/AccessTokenManager.java

Revision:

45:2aa9f933c8d2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dcs-sdk-java-master/app/src/main/java/com/baidu/duer/dcs/oauth/api/AccessTokenManager.java	Tue Jul 18 16:34:48 2017 +0800
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2017 Baidu, Inc. All Rights Reserved.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.baidu.duer.dcs.oauth.api;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.os.Bundle;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import static com.baidu.duer.dcs.oauth.api.OauthPreferenceUtil.BAIDU_OAUTH_CONFIG;
+
+/**
+ * 对Token相关信息的管理类，包括初始化、存储、清除相应的token信息
+ * 由于AccessTokenManager涉及到在多个Activity中传递的，所以实现了Parcelable接口
+ * <p>
+ * Created by zhangyan42@baidu.com on 2017/5/24.
+ */
+public class AccessTokenManager implements Parcelable {
+    // accessToken信息
+    private String accessToken;
+    // token过期时间
+    private long expireTime = 0;
+    // 当前的上下文环境
+    private Context context;
+
+    /**
+     * 构建AccessTokenManager类
+     *
+     * @param context 当前的上下文环境，通常为××Activity.this等
+     */
+    public AccessTokenManager(Context context) {
+        this.context = context;
+        compareWithConfig();
+    }
+
+    /**
+     * 通过Parcel流构建AccessTokenManager，主要用在Parcelable.Creator中
+     *
+     * @param source Parcel 流信息
+     */
+    public AccessTokenManager(Parcel source) {
+        Bundle bundle = Bundle.CREATOR.createFromParcel(source);
+        if (bundle != null) {
+            this.accessToken = bundle.getString(OauthConfig.BundleKey.KEY_ACCESS_TOKEN);
+            this.expireTime = bundle.getLong(OauthConfig.BundleKey.KEY_EXPIRE_TIME);
+        }
+        compareWithConfig();
+    }
+
+    /**
+     * 检查当token信息与配置文件是否保持一致，若不一致则对当前的token信息进行初始化
+     */
+    private void compareWithConfig() {
+        if (this.context == null) {
+            return;
+        }
+
+        /**
+         * 对配置的权限信息进行监控，保持多个AccessTokenManager对象之间的，权限信息一致。
+         */
+        final SharedPreferences sp = this.context.getSharedPreferences(BAIDU_OAUTH_CONFIG, Context.MODE_PRIVATE);
+        sp.registerOnSharedPreferenceChangeListener(new OnSharedPreferenceChangeListener() {
+
+            @Override
+            public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+                String acToken = sp.getString(OauthConfig.PrefenenceKey.SP_ACCESS_TOKEN, null);
+                if (accessToken != null && !accessToken.equals(acToken)) {
+                    initToken();
+                }
+            }
+        });
+    }
+
+    /**
+     * 从SharedPreference中读取token数据，并初步判断数据的有效性
+     */
+    protected void initToken() {
+        this.accessToken = OauthPreferenceUtil.getAccessToken(context);
+        long expires = OauthPreferenceUtil.getExpires(context);
+        long createTime = OauthPreferenceUtil.getCreateTime(context);
+        long current = System.currentTimeMillis();
+        this.expireTime = createTime + expires;
+        if (expireTime != 0 && expireTime < current) {
+            clearToken();
+        }
+    }
+
+    /**
+     * 清楚SharedPreference中的所有数据
+     */
+    protected void clearToken() {
+        OauthPreferenceUtil.clearAllOauth(context);
+        this.accessToken = null;
+        this.expireTime = 0;
+    }
+
+    /**
+     * 将token信息存储到SharedPreference中
+     *
+     * @param values token信息的key-value形式
+     */
+    protected void storeToken(Bundle values) {
+        if (values == null || values.isEmpty()) {
+            return;
+        }
+        this.accessToken = values.getString("access_token");
+        // expires_in 返回值为秒
+        long expiresIn = Long.parseLong(values.getString("expires_in")) * 1000;
+        this.expireTime = System.currentTimeMillis() + expiresIn;
+        OauthPreferenceUtil.setAccessToken(context, this.accessToken);
+        OauthPreferenceUtil.setCreateTime(context, System.currentTimeMillis());
+        OauthPreferenceUtil.setExpires(context, expiresIn);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        Bundle bundle = new Bundle();
+        if (this.accessToken != null) {
+            bundle.putString(OauthConfig.BundleKey.KEY_ACCESS_TOKEN, this.accessToken);
+        }
+        if (this.expireTime != 0) {
+            bundle.putLong(OauthConfig.BundleKey.KEY_EXPIRE_TIME, this.expireTime);
+        }
+        bundle.writeToParcel(dest, flags);
+    }
+
+    public static final Creator<AccessTokenManager> CREATOR = new Creator<AccessTokenManager>() {
+        @Override
+        public AccessTokenManager createFromParcel(Parcel source) {
+            return new AccessTokenManager(source);
+        }
+
+        @Override
+        public AccessTokenManager[] newArray(int size) {
+            return new AccessTokenManager[size];
+        }
+
+    };
+
+    /**
+     * 判断当前的token信息是否有效
+     *
+     * @return true/false
+     */
+    protected boolean isSessionValid() {
+        if (this.accessToken == null || this.expireTime == 0) {
+            initToken();
+        }
+        return this.accessToken != null && this.expireTime != 0 && System.currentTimeMillis() < this.expireTime;
+    }
+
+    /**
+     * 获取AccessToken信息
+     *
+     * @return accessToken
+     */
+    public String getAccessToken() {
+        if (this.accessToken == null) {
+            initToken();
+        }
+        return this.accessToken;
+    }
+}
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