好了言归正传，直奔主题
最近为了完成项目最后的一个大功能，那就是如果软件有更新怎么办？那肯定是要做到自动提示更新了。
如果是Android的话这个网上资料一堆，直接copy，但是mono for android压根就没有，所以我只能参考java代码用C#写了。下面是我的资料：
1.在AndroidManifest.xml文件中加入这个
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="internalOnly" package="com.myapp" android:versionName="3.0.0.0">
每次只需要修改versionName就好。(package 的名字不需要修改，否则会出错，我试过了)
2.下面是定义一个Global.cs文件，用于读取当前app的版本号。
public class Global
{
//Vision information
public static string getVersion(Context context)
{
string version = "";
try
{
version = context.PackageManager.GetPackageInfo("com.myapp", 0).VersionName;
}
catch (Exception exception)
{
MessageBox.Show(context,"CONFIRM",exception.Message);//这是本人写的一个messagebox
}
return version;
}
}
3.和服务器版本的对比。
这个随意你怎么对比了，我是直接把版本号发到服务器上，服务器有存储当前最新版本的版本号，如果相等就不管，否则就提示更新。
4.下载文件，更新app（这个我用了三天才搞定，断断续续）。
public class UpdateManager
{
private Context mContext;
//返回的安装包url
private string apkUrl = "http://localhost/msoft/mars.apk";
private Dialog downloadDialog;
/* 下载包安装路径 */
private static string savePath = "/sdcard/Download/";
private static string saveFileName = savePath + "mars.apk";
/* 进度条与通知ui刷新的handler和msg常量 */
private ProgressBar mProgress;
private int progress;
private bool interceptFlag = false;
public UpdateManager(Context context)
{
this.mContext = context;
}
public void showDownloadDialog()
{
AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.SetTitle("Upgrade sofware");
LayoutInflater inflater = LayoutInflater.From(mContext);
View v = inflater.Inflate(Resource.Layout.progress,null);
mProgress = (ProgressBar)v.FindViewById(Resource.Id.progress);
builder.SetView(v);
builder.SetNegativeButton("Cancel",new MyClickListener());
interceptFlag = MyClickListener.interceptFlag;
downloadDialog = builder.Create();
downloadDialog.Show();
Task.Factory.StartNew(() => downloadApk());
}
private void downloadApk()
{
try
{
URL url = new URL(apkUrl);
HttpURLConnection conn = (HttpURLConnection)url.OpenConnection();
conn.SetRequestProperty("User-Agent","PacificHttpClient");
conn.Connect();
conn.ConnectTimeout = 10000;
conn.ReadTimeout = 20000;
int length = conn.ContentLength;
System.IO.Stream stream = conn.InputStream;
File file = new File(savePath);
if (!file.Exists())
{
file.Mkdir();
}
string apkFile = saveFileName;
File ApkFile = new File(apkFile);
FileOutputStream fos = new FileOutputStream(ApkFile);
int count = 0;
int intBufferSize = 16384 * 8;//这个Size随意你喜欢。
byte[] bytBuffer = new byte[intBufferSize];
interceptFlag = false;
int numread = 0;
while ((numread = stream.Read(bytBuffer, 0, intBufferSize)) > 0)
{
count += numread;
progress = (int)(((float)count / length) * 100);
mProgress.Progress = progress;
fos.Write(bytBuffer,0,numread);
}
if (numread == 0)
Task.Factory.StartNew(()=> installApk());
fos.Close();
stream.Close();
}
catch (MalformedURLException exception)
{
exception.PrintStackTrace();
}
}
private void installApk()
{
downloadDialog.Dispose();
File apkfile = new File(saveFileName);
if (!apkfile.Exists())
{
return;
}
var targetUri = Android.Net.Uri.FromFile(apkfile);
Intent i = new Intent(Intent.ActionView);
i.SetDataAndType(targetUri, "application/vnd.android.package-archive");
mContext.StartActivity(i);
}
}
class MyClickListener : Java.Lang.Object, IDialogInterfaceOnClickListener
{
public static bool interceptFlag = false;
public void OnClick(IDialogInterface dialog,int which)
{
dialog.Dismiss();
interceptFlag = true;
}
}
好了，到此为止，更新app功能完成了。我觉得比java的简单了。希望对你有所帮助吧，不明白的可以留言哦！