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我正在使用 Web 服务在 Android 中构建应用程序。我想做的是同步功能。我正在从 Web 服务器获取一些属性，并且我有一个布尔值，如果布尔值为真，那么它将更新我下载的文档。

但是我被困在这里，要么我需要先删除文档然后替换它，要么我可以直接替换文档。代码是这样的：

SoapObject DocResponse = (SoapObject)envelope.getResponse();    
        Log.i("Uspdated Documentss", DocResponse.toString());   
        for(int i=0; i < DocResponse.getPropertyCount(); i++)
        {
            SoapObject SingleSubFolder = (SoapObject)DocResponse.getProperty(i);        
            ID = SingleSubFolder.getProperty(0).toString();
            fileLongName = SingleSubFolder.getProperty(1).toString();
            UserFileName = SingleSubFolder.getProperty(2).toString();
            url = SingleSubFolder.getProperty(3).toString();
            fileExtension = SingleSubFolder.getProperty(4).toString();
            lastModifiedDate = SingleSubFolder.getProperty(5).toString();
            SubjectType = SingleSubFolder.getProperty(6).toString();
            IsUpdated = SingleSubFolder.hasProperty("IsUpdated");
            db = new DMS_Database(context);
            if(IsUpdated==true)
            {

 // How to perform replace function from database here???
 // Is there any need of download manager so that again it download new folder into the phone storage or into the database???

            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.setTitle(UserFileName);
            // in order for this if to run, you must use the android 3.2 to compile your app
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) 
                {
                    request.allowScanningByMediaScanner();
                    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                }
                    request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS + "/Downloads", UserFileName);
                    DownloadManager manager = (DownloadManager)Activtyclass.mAct.getSystemService(Context.DOWNLOAD_SERVICE);
                    manager.enqueue(request);
            }
            db.close();
        }
}   
    catch(Exception e) 
    {
        e.printStackTrace();
        Toast.makeText(context, " Network Exception : " + e
                + "Please check network connectivity.", Toast.LENGTH_LONG).show();
    }

数据库：这是我的数据库方法……对吗？？？

public void update_Doc(String Id, String name, String url)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues updatenote = new ContentValues();
updatenote.put(DOCUMENT_ID, Id);
updatenote.put(DOCUMENT_NAME, name);
updatenote.put(DOCUMENT_URL, url);
db.update(DOCUMENT_TABLE, updatenote, DOCUMENT_ID + "=?" , new String[]    {String.valueOf(Id)});
}
4

1 回答 1

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public void update_Doc(String Id, String name, String url)
{
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues updatenote = new ContentValues();
    updatenote.put(DOCUMENT_ID, Id);
    updatenote.put(DOCUMENT_NAME, name);
    updatenote.put(DOCUMENT_URL, url);
    long id = db.insertWithOnConflict(DOCUMENT_TABLE, null, updatenote,  SQLiteDatabase.CONFLICT_IGNORE);
    if (id == -1) 
    {
        db.update(DOCUMENT_TABLE, updatenote, DOCUMENT_ID + "=?" , new String[]    {String.valueOf(Id)});
    }

}
于 2013-05-13T07:59:42.293 回答