public void downloadAndLoad(Context context, final PatchBean bean, String downloadUrl) {
    if (mLocalPreferencesHelper == null) {
        mLocalPreferencesHelper = new LocalPreferencesHelper(context, SPConst.SP_NAME);
    }
    Uri downloadUri = Uri.parse(downloadUrl);
    Uri destinationUri = Uri.parse(Environment.getExternalStorageDirectory()
            .getAbsolutePath() + bean.url);
    DownloadRequest downloadRequest = new DownloadRequest(downloadUri)
            .setDestinationURI(destinationUri)
            .setPriority(DownloadRequest.Priority.HIGH)
            .setDownloadListener(new DownloadStatusListener() {
                @Override
                public void onDownloadComplete(int id) {
                    // add patch at runtime
                    try {
                        // .apatch file path
                        String patchFileString = Environment.getExternalStorageDirectory()
                                .getAbsolutePath() + bean.url;
                        BaseApplication.mPatchManager.addPatch(patchFileString);
                        Log.d(TAG, "apatch:" + patchFileString + " added.");

                        //复制且加载补丁成功后，删除下载的补丁
                        File f = new File(patchFileString);
                        if (f.exists()) {
                            boolean result = new File(patchFileString).delete();
                            if (!result)
                                Log.e(TAG, patchFileString + " delete fail");
                        }
//                            mLocalPreferencesHelper.saveOrUpdate(SPConst.IsHavePathDownLoad, false);
                    } catch (IOException e) {
                        Log.e(TAG, "", e);
                    } catch (Throwable throwable) {

                    }
                }

                @Override
                public void onDownloadFailed(int id, int errorCode, String errorMessage) {
                    //下载失败的时候，标注标记位，等下次重新打开应用的时候重新下载
//                        mLocalPreferencesHelper.saveOrUpdate(SPConst.IsHavePathDownLoad, true);
                    Log.e(TAG, "onDownloadFailed");

                }

                @Override
                public void onProgress(int id, long totalBytes, int progress) {
                    Log.e(TAG, "progress:" + progress);
                }
            });
    mDownloadManager = new ThinDownloadManager(THREAD_COUNT);
    mDownloadManager.add(downloadRequest);
}

    public void comparePath(Context context, PatchBean RemoteBean) throws Exception {
    String pathInfo = mLocalPreferencesHelper.getString(SPConst.PATH_INFO);
    final PatchBean localBean = GsonUtils.getInstance().parseIfNull(PatchBean.class, pathInfo);
    //远程的应用版本跟当前应用的版本比较
    if (BaseApplication.VERSION_NAME.equals(RemoteBean.app_v)) {
        //远程的应用版本跟本地保存的应用版本一样，但补丁不一样，则需要下载重新
        /**
         *第一种情况：当本地记录的Bean为空的时候（刚安装的时候可能为空）并且远程的Bean的path_v不为空的时候需要下载补丁。
         * 第二种情况：当本地记录的path_v和远程Bean的path_v不一样的时候需要下载补丁。
         */
        if (localBean == null && !TextUtils.isEmpty(RemoteBean.path_v)
                || localBean.app_v.equals(RemoteBean.app_v) &&
                !localBean.path_v.equals(RemoteBean.path_v)) {
            downloadAndLoad(context, RemoteBean,
                    SPConst.URL_PREFIX + RemoteBean.url);
            String json = GsonUtils.getInstance().parse(RemoteBean);
            mLocalPreferencesHelper.saveOrUpdate(SPConst.PATH_INFO, json);
        } /*else {
            mLocalPreferencesHelper.saveOrUpdate(SPConst.IsHavePathDownLoad, false);
        }*/
    }
}

Copyright 2016 zhonghanwen

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.