[移动开发]Copy Sqlite to Local

  string DB_PATH = "/data/";
        String DB_NAME = "AppDB.db";
        string DBFile = "";

   private void InitApp()
        { 
            try
            {
                string db_File = DB_PATH + DB_NAME;
                if (Android.OS.Environment.MediaMounted.Equals(Android.OS.Environment.ExternalStorageState))
                {
                    var file = Android.OS.Environment.ExternalStorageDirectory; 
                    string path = file.Path + DB_PATH;
                    if (System.IO.Directory.Exists(path) == false)
                    {
                        System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(path);
                        di.Create(); 
                    }
                    db_File = path + DB_NAME;
                    DBFile = db_File;
                    if (System.IO.File.Exists(db_File) == false)
                    {
                        const int maxReadSize = 256 * 1024;
                        byte[] content;
                        AssetManager assets = this.Assets;
                        using (BinaryReader br = new BinaryReader(assets.Open(DB_NAME)))
                        { 
                            content = br.ReadBytes(maxReadSize);
                        }
                        FileStream fs = new FileStream(db_File, FileMode.Create); 
                        BinaryWriter bw = new BinaryWriter(fs); 
                        bw.Write(content); 
                        bw.Close(); 
                        fs.Close(); 
                    }
                   
                } 
            }
                catch (Exception ex)
            {
                ShowMessageBox(ex.Message);
            }
        }