Hello StackOverflow用户,
我在Play商店之外有一个Android应用。它通过下载新的APK并使用Intent调用安装程序对话框来更新自身。更新功能在Android 10上不再起作用。
我现在需要在Android 10上使用PackageInstaller API,但无法正常工作。我的应用不是设备或个人资料所有者,但由于我不想进行静默安装,因此我认为应该没问题。
我的问题是,一旦我提交了会话,绝对没有任何反应。
PackageInstaller installer = activity.PackageManager.PackageInstaller;
PackageInstaller.SessionParams sessionParams = new PackageInstaller.SessionParams(PackageInstallMode.FullInstall);
int sessionId = installer.CreateSession(sessionParams);
PackageInstaller.Session session = installer.OpenSession(sessionId);
var input = new FileStream(pfad, FileMode.Open, FileAccess.Read);
var packageInSession = session.OpenWrite("package", 0, -1);
input.CopyTo(packageInSession);
packageInSession.Close();
input.Close();
//That this is necessary could be a Xamarin bug.
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Intent intent = new Intent(activity, activity.Class);
intent.SetAction("com.example.android.apis.content.SESSION_API_PACKAGE_INSTALLED");
PendingIntent pendingIntent = PendingIntent.GetActivity(activity, 0, intent, 0);
IntentSender statusReceiver = pendingIntent.IntentSender;
// Commit the session (this will start the installation workflow).
session.Commit(statusReceiver);
我查看了DDMS,但没有发现任何相关内容。可能感兴趣的一件事是,当我Dispose()
流时,我得到了一个IOException: write failed (EBADF) bad file descriptor
,这表明APK错误。但我怀疑这是因为我可以使用文件管理器安装APK而没有任何障碍。谷歌搜索错误并没有带我到任何地方。
我该如何解决此问题?
为了确保apk在Android Q中成功安装,您需要确保以下几点:>
private static void AddApkToInstallSession(Context context, Android.Net.Uri apkUri, PackageInstaller.Session session)
{
var packageInSession = session.OpenWrite("package", 0, -1);
var input = context.ContentResolver.OpenInputStream(apkUri);
try
{
if (input != null)
{
input.CopyTo(packageInSession);
}
else
{
throw new Exception("Inputstream is null");
}
}
finally
{
packageInSession.Close();
input.Close();
}
//That this is necessary could be a Xamarin bug.
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
}
protected override void OnNewIntent(Intent intent)
{
Bundle extras = intent.Extras;
if (PACKAGE_INSTALLED_ACTION.Equals(intent.Action))
{
var status = extras.GetInt(PackageInstaller.ExtraStatus);
var message = extras.GetString(PackageInstaller.ExtraStatusMessage);
switch (status)
{
case (int)PackageInstallStatus.PendingUserAction:
// Ask user to confirm the installation
var confirmIntent = (Intent)extras.Get(Intent.ExtraIntent);
StartActivity(confirmIntent);
break;
case (int)PackageInstallStatus.Success:
//TODO: Handle success
break;
case (int)PackageInstallStatus.Failure:
case (int)PackageInstallStatus.FailureAborted:
case (int)PackageInstallStatus.FailureBlocked:
case (int)PackageInstallStatus.FailureConflict:
case (int)PackageInstallStatus.FailureIncompatible:
case (int)PackageInstallStatus.FailureInvalid:
case (int)PackageInstallStatus.FailureStorage:
//TODO: Handle failures
break;
}
}
}
LaunchMode.SingleTop
PackageManager.CanRequestPackageInstalls()
来检查是否存在这种情况。如果此函数返回false,则可以使用以下代码打开应用程序选项窗口:StartActivity(new Intent( Android.Provider.Settings.ActionManageUnknownAppSources, Android.Net.Uri.Parse("package:" + Android.App.Application.Context.PackageName)));
因此用户可以轻松设置开关以启用此功能。
public void InstallPackageAndroidQAndAbove(Android.Net.Uri apkUri)
{
var packageInstaller = PackageManager.PackageInstaller;
var sessionParams = new PackageInstaller.SessionParams(PackageInstallMode.FullInstall);
int sessionId = packageInstaller.CreateSession(sessionParams);
var session = packageInstaller.OpenSession(sessionId);
AddApkToInstallSession(apkUri, session);
// Create an install status receiver.
var intent = new Intent(this, this.Class);
intent.SetAction(PACKAGE_INSTALLED_ACTION);
var pendingIntent = PendingIntent.GetActivity(this, 0, intent, 0);
var statusReceiver = pendingIntent.IntentSender;
// Commit the session (this will start the installation workflow).
session.Commit(statusReceiver);
}