Maui自动更新(安卓)

在服务器创建版本查询txt或者接口等其他方式。

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HttpClient httpClient = new();
var response = await httpClient.GetStringAsync("http://x.x.x.x/version.txt");

查询本地程序版本，对比版本号是否需要更新。

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// 简单信息
string name = AppInfo.Current.Name;
string package = AppInfo.Current.PackageName;
string version = AppInfo.Current.VersionString;
string build = AppInfo.Current.BuildString;
// 详细信息
var Text = VersionTracking.Default.IsFirstLaunchEver.ToString();
Text = VersionTracking.Default.IsFirstLaunchForCurrentVersion.ToString();
Text = VersionTracking.Default.IsFirstLaunchForCurrentBuild.ToString();
Text = VersionTracking.Default.CurrentVersion.ToString();
Text = VersionTracking.Default.CurrentBuild.ToString();
Text = VersionTracking.Default.FirstInstalledVersion.ToString();
Text = VersionTracking.Default.FirstInstalledBuild.ToString();
Text = String.Join(',', VersionTracking.Default.VersionHistory);
Text = String.Join(',', VersionTracking.Default.BuildHistory);

// These two properties may be null if this is the first version
Text = VersionTracking.Default.PreviousVersion?.ToString() ?? "none";
Text = VersionTracking.Default.PreviousBuild?.ToString() ?? "none";

下载新版程序(C#HttpClient下载进度)，保存到目录Android.App.Application.Context.GetExternalFilesDir(null)、FileSystem.Current.CacheDirectory或者Android.App.Application.Context.GetExternalCacheDirs().First().AbsolutePath。

启动安装程序。
添加权限设置到AndroidManifest.xml文件的applicationttag下。

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<provider
    android:name="androidx.core.content.FileProvider"
    android:authorities="${applicationId}.provider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths" />
</provider>

再添加包相关权限。

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<uses-permission android:name="android.permission.INSTALL_PACKAGES" />
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
<uses-permission android:name="android.permission.REQUEST_DELETE_PACKAGES" />
<uses-permission android:name="android.permission.DELETE_PACKAGES" />

在\Platforms\Android\Resources创建xml文件夹\Platforms\Android\Resources\xml，在文件夹下面创建provider_paths.xml，设置文件属性中的生成操作/Build Action为AndroidResource，provider_paths.xml文件内容如下。

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<?xml version="1.0" encoding="utf-8" ?> 
<paths xmlns:android="schemas.android.com/apk/res/android"> 
    <external-path name="external_files" path="." />
    <external-files-path name="external_files_path" path="." />
    <files-path name="internal_files_path" path="." />
    <cache-path name="internal_cache_path" path="." />
</paths>

安装代码如下。

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async Task InstallAPK()
{
#if ANDROID
            var context = Android.App.Application.Context;
            var path = Path.Combine(Android.App.Application.Context.GetExternalFilesDir(null).AbsolutePath, "com.companyname.mauiapp.apk"); // file文件夹
            path = Path.Combine(Android.App.Application.Context.GetExternalCacheDirs().First().AbsolutePath, "com.companyname.mauiapp.apk"); // cache文件夹
            Java.IO.File file = new Java.IO.File(path);

            try
            {
                using (Android.Content.Intent install = new Android.Content.Intent(Android.Content.Intent.ActionView))
                {
                    Android.Net.Uri apkURI = AndroidX.Core.Content.FileProvider.GetUriForFile(context, context.ApplicationContext.PackageName + ".provider", file);
                    apkURI = Microsoft.Maui.Storage.FileProvider.GetUriForFile(context, context.ApplicationContext.PackageName + ".provider", file); // 使用maui库
                    install.SetDataAndType(apkURI, "application/vnd.android.package-archive");
                    install.AddFlags(Android.Content.ActivityFlags.NewTask);
                    install.AddFlags(Android.Content.ActivityFlags.GrantReadUriPermission);
                    install.AddFlags(Android.Content.ActivityFlags.ClearTop);
                    install.PutExtra(Android.Content.Intent.ExtraNotUnknownSource, true);

                    Platform.CurrentActivity.StartActivity(install);
                }
            }
            catch (Exception ex)
            {
            }
#endif
}

如果使用Platform.CurrentActivity.StartActivityForResult(install);方法执行安装，可以在MainActivity中重写OnActivityResult方法。

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protected override void OnActivityResult(int requestCode, Result resultCode, Intent? data)
{
     base.OnActivityResult(requestCode, resultCode, data);
}

清理安装包Maui接收包安装删除广播(安卓)。