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Code Issues Projects Releases Wiki Activity

Versioning db Android

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This commit is contained in:
Yan Maniez 2018-10-22 00:07:23 +02:00
parent 9d83e524cd
commit a7d83aa6f0
3 changed files with 54 additions and 27 deletions
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3
AideDeJeu/AideDeJeu.Android/AideDeJeu.Android.csproj
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@ -109,6 +109,9 @@
<AndroidAsset Include="..\..\Data\library.db">
<Link>Assets\library.db</Link>
</AndroidAsset>
<AndroidAsset Include="..\..\Data\library.ver">
<Link>Assets\library.ver</Link>
</AndroidAsset>
<None Include="Resources\AboutResources.txt" />
<None Include="Assets\AboutAssets.txt" />
</ItemGroup>

77
AideDeJeu/AideDeJeu.Android/NativeAPI.cs
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@ -1,6 +1,5 @@
using AideDeJeu.Tools;
using Android.Content.PM;
using System;
using System.IO;
using System.Threading.Tasks;
@ -30,36 +29,60 @@ namespace AideDeJeu.Droid
public async Task<string> GetDatabasePathAsync(string databaseName)
{
//string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
//string dbPath = Path.Combine(path, databaseName);
//return dbPath;
var documentsDirectoryPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
var path = Path.Combine(documentsDirectoryPath, $"{databaseName}.db");
if (await CheckDatabaseVersionAsync(databaseName))
{
await CopyOldToNewFileAsync(databaseName, "db");
await CopyOldToNewFileAsync(databaseName, "ver");
}
return GetNewFilePath(databaseName, "db");
}
// This is where we copy in our pre-created database
public Stream GetOldFileStream(string fileName, string extension)
{
return Android.App.Application.Context.Assets.Open($"{fileName}.{extension}");
}
public string GetNewFilePath(string fileName, string extension)
{
var documentsDirectoryPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
return Path.Combine(documentsDirectoryPath, $"{fileName}.{extension}");
}
public async Task CopyOldToNewFileAsync(string fileName, string extension)
{
using (var inStream = GetOldFileStream(fileName, extension))
{
using (var outStream = new FileStream(GetNewFilePath(fileName, extension), FileMode.Create))
{
await inStream.CopyToAsync(outStream);
}
}
}
public async Task<bool> CheckDatabaseVersionAsync(string databaseName)
{
var path = GetNewFilePath(databaseName, "ver");
if (!File.Exists(path))
{
using (var inStream = Android.App.Application.Context.Assets.Open($"{databaseName}.db"))
{
using (var outStream = new FileStream(path, FileMode.Create))
{
await inStream.CopyToAsync(outStream);
}
}
//using (var binaryReader = new BinaryReader(Android.App.Application.Context.Assets.Open(databaseName)))
//{
// using (var binaryWriter = new BinaryWriter(new FileStream(path, FileMode.Create)))
// {
// byte[] buffer = new byte[2048];
// int length = 0;
// while ((length = binaryReader.Read(buffer, 0, buffer.Length)) > 0)
// {
// binaryWriter.Write(buffer, 0, length);
// }
// }
//}
return true;
}
return path;
int newVersion = 0;
int oldVersion = -1;
using (var newStream = GetOldFileStream(databaseName, "ver"))
{
using (var sr = new StreamReader(newStream))
{
var str = await sr.ReadToEndAsync();
int.TryParse(str, out newVersion);
}
}
using (var oldStream = new FileStream(path, FileMode.Open))
{
using (var sr = new StreamReader(oldStream))
{
var str = await sr.ReadToEndAsync();
int.TryParse(str, out oldVersion);
}
}
return newVersion > oldVersion;
}
}
}

1
Data/library.ver Normal file
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@ -0,0 +1 @@
4