Xamarin 和 android 媒体和照片权限 - 应用程序在发布模式下崩溃

Question

我有一个很奇怪的问题，我认为它与权限有关。当我运行我的应用程序处于调试模式时，它运行没问题，但是当我运行它处于发布模式时它崩溃了。我认为它可能与权限有关的原因是当我运行应用程序处于调试模式时，当它部署在我的测试设备（我的三星 phone）上时，它要求我允许访问照片和媒体。我已经在清单中设置了所有权限，甚至与照片和媒体远程相关，并且在 MainActivity.cs 中有代码来检查这些权限，但是当我运行在我的 phone 上调试应用程序时它仍然要求获得访问照片和媒体的权限。我在清单中没有看到任何特别提到照片的内容，就像我之前所说的那样，我在清单中授予了对甚至提到“媒体”的所有内容的访问权限。我的应用程序还访问互联网、前台和其他需要设置权限的区域，我已经在清单中设置了这些并且没有问题，只有这个。我在这里错过了什么？

我的MainActivity.cs代码：

    protected override void OnCreate(Bundle savedInstanceState)
    {
        try
        {


            if (ActivityCompat.CheckSelfPermission(this, Android.Manifest.Permission.ReadExternalStorage) != Android.Content.PM.Permission.Granted)
            {

                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.ReadExternalStorage }, 1);
            }

            if (ActivityCompat.CheckSelfPermission(this, Android.Manifest.Permission.ForegroundService) != Android.Content.PM.Permission.Granted)
            {
                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.ForegroundService }, 1);
            }

            if (ActivityCompat.CheckSelfPermission(this,Android.Manifest.Permission.Internet) != Android.Content.PM.Permission.Granted)
            {
                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.Internet }, 1);
            }

            if (ActivityCompat.CheckSelfPermission(this,Android.Manifest.Permission.AccessNetworkState) != Android.Content.PM.Permission.Granted)
            {

                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.AccessNetworkState }, 1);
            }
            if (ActivityCompat.CheckSelfPermission(this, Android.Manifest.Permission.AccessMediaLocation) != Android.Content.PM.Permission.Granted)
            {

                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.AccessMediaLocation }, 1);
            }

            if (ActivityCompat.CheckSelfPermission(this, Android.Manifest.Permission.MediaContentControl) != Android.Content.PM.Permission.Granted)
            {

                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.MediaContentControl }, 1);
            }
            if (ActivityCompat.CheckSelfPermission(this, Android.Manifest.Permission.Camera) != Android.Content.PM.Permission.Granted)
            {

                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.Camera }, 1);
            }
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.logon);
            RequestedOrientation = Android.Content.PM.ScreenOrientation.Portrait;
            UserDialogs.Init(this);
            Button MyButton_Submit = FindViewById<Android.Widget.Button>(Resource.Id.button_submit);
            aTextboxUsername = FindViewById<EditText>(Resource.Id.aTextboxUsername);
            aTextboxPassword = FindViewById<EditText>(Resource.Id.aTextboxPassword);
            InputMethodManager board = (InputMethodManager)GetSystemService(Context.InputMethodService);
            board.HideSoftInputFromWindow(aTextboxUsername.WindowToken, 0);

            Button MyButton_CreateAccount = FindViewById<Android.Widget.Button>(Resource.Id.button_createaccount);
            MyButton_CreateAccount.SetBackgroundColor(Android.Graphics.Color.YellowGreen);

            MyButton_Submit.Click += async (sender, e) =>
            {
                ManualResetEvent resetEvent = new ManualResetEvent(false);

                ProgressBarHandler myprogressbar = new ProgressBarHandler(this);
                myprogressbar.show();

                var thread = new System.Threading.Thread(new ThreadStart(async delegate
                {
                    await SignOn(myprogressbar);
                    resetEvent.Set();

                }));
                thread.Start();

                await Task.Run(() => resetEvent.WaitOne());

                while (thread.ThreadState == ThreadState.Running)
                {
                    await Task.Delay(100);
                }

                myprogressbar.hide();

                if (myprogressbar.ErrorMesage != null)
                {
                    showMessage(myprogressbar.ErrorMesage);
                }
            };

            MyButton_CreateAccount.Click += (sender, e) =>
            {
                Intent intent = new Intent(this, typeof(CreateAccount));
                Bundle bundlee = new Bundle();
                intent.PutExtra("TheBundle", bundlee);
                StartActivity(intent);
            };
        }
        catch (Exception ex)
        {
            Utils.LogError("An error occured in MainActivity.cs, the error is: " + ex.Message);
        }
    }

*** 更新 ***

这是我在设备日志中看到的：

Time    Device Name Type    PID Tag Message
06-24 08:58:00.417  Samsung SM-G973U    Warning 1141    ContextImpl Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1162 com.android.server.am.AppErrors.crashApplicationInner:579 com.android.server.am.AppErrors.crashApplication:443 com.android.server.am.ActivityManagerService.handleApplicationCrashInner:12323 com.android.server.am.ActivityManagerService.handleApplicationCrash:12258 
  Force finishing activity My.App/crc64a23c41873b6fbff5.MainActivity
06-24 08:58:00.417  Samsung SM-G973U    Info    2468    dumpstate   skip_space_check : 0
06-24 08:58:00.417  Samsung SM-G973U    Info    2468    dumpstate   skeymaster_only: 0, keystore_only: 0
06-24 08:58:00.417  Samsung SM-G973U    Info    2468    dumpstate   shutdown_broadcast: 0, shutdown_delay: 0
06-24 08:58:00.417  Samsung SM-G973U    Info    2468    dumpstate   sec_mode : 1 dump_flags : 247031436, booting_delay : 0 booting_enospc : 0 sys_rescue : 0 sys_error : 0 sys_native : 0 sys_watchdog : 0 app_error : 1 app_native : 0 app_anr : 0
06-24 08:58:00.416  Samsung SM-G973U    Info    2468    dumpstate   do_zip_file: 1 do_vibrate: 0 use_socket: 0 use_control_socket: 0 do_screenshot: 0 is_remote_mode: 0 show_header_only: 0 do_start_service: 0 telephony_only: 0 wifi_only: 0 do_progress_updates: 0 fd: 10 bugreport_mode: BUGREPORT_A_ERROR dumpstate_hal_mode: DEFAULT limited_only: 0 args: 
06-24 08:58:00.416  Samsung SM-G973U    Warning 1141    ActivityManager crash : My.App,10511

Answer 1

好吧，经过 2 天的痛苦过程后，我（显然）弄明白了。

我在项目->属性->Android选项中关闭（未选中）Enable Multi-Dex

该应用现在可以在发布模式下正常运行。

Xamarin 和 android 媒体和照片权限 - 应用程序在发布模式下崩溃

Xamarin and android Permissions for Media and Photos - app crashes in release mode

c#

xamarin

android-permissions

visual-studio-2019