C# Xamarin表单,应用程序在VisualStudioAndroid Emulator上运行,但在真实设备上崩溃
我已经创建了一个应用程序,当构建应用程序在VisualStudioEmulator上完美运行时。因此,我创建了release Build,并尝试在我的物理android设备上运行该应用程序。我在设备上收到以下错误消息。我使用了C# Xamarin表单,应用程序在VisualStudioAndroid Emulator上运行,但在真实设备上崩溃,c#,visual-studio,xamarin,xamarin.forms,xamarin.android,C#,Visual Studio,Xamarin,Xamarin.forms,Xamarin.android,我已经创建了一个应用程序,当构建应用程序在VisualStudioEmulator上完美运行时。因此,我创建了release Build,并尝试在我的物理android设备上运行该应用程序。我在设备上收到以下错误消息。我使用了Xam.plugin.media android.runtime.JavaProxyThrowable:System.NullReferenceException:对象引用未设置为对象的实例 在Xamarin.Forms.Platform.Android.formsappc
Xam.plugin.media
android.runtime.JavaProxyThrowable:System.NullReferenceException:对象引用未设置为对象的实例
在Xamarin.Forms.Platform.Android.formsappcompativity.InternalSetPage(Xamarin.Forms.Page)[0x0006f]中:0
位于:0中的Xamarin.Forms.Platform.Android.formsappcompativity.SetMainPage()[0x0000c]
位于:0中的Xamarin.Forms.Platform.Android.formsappcompativity.LoadApplication(Xamarin.Forms.Application应用程序)[0x0025c]
兴趣点:0中的match.Droid.MainActivity.OnCreate(Android.OS.Bundle包)[0x00033]
在Android.Support.V4.App.FragmentActivity.n_OnCreate_Landroid_os_Bundle_(System.IntPtr jnienv,System.IntPtr native_this,System.IntPtr native_savedInstanceState)[0x0000f]in:0
at(包装器动态方法)系统。对象:6b534aff-3541-46f2-a92e-AC0024B9C4A7(intptr、intptr、intptr)
在MD5ED93386354F0E17F050B288571203CA.MainActivity.n_onCreate处(本机方法)
在MD5ED93386354F0E17F050B288571203Ca.MainActivity.onCreate(MainActivity.java:29)
位于android.app.Activity.performCreate(Activity.java:6303)
位于android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2402)上
在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2509)上
在android.app.ActivityThread.access上$1000(ActivityThread.java:153)
在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)上
位于android.os.Handler.dispatchMessage(Handler.java:102)
位于android.os.Looper.loop(Looper.java:154)
位于android.app.ActivityThread.main(ActivityThread.java:5523)
位于java.lang.reflect.Method.invoke(本机方法)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)上
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
这是我的密码
MainActivity.cs
public class MainActivity global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
Plugin.CurrentActivity.CrossCurrentActivity.Current.Activity = this;
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
LoadApplication(new App());
}
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Android.Content.PM.Permission[] grantResults)
{
PermissionsImplementation.Current.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
using InterestMatch.Inter;
using InterestMatch.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Xamarin.Auth;
using Xamarin.Forms;
namespace InterestM
{
public partial class App : Application
{
public static string AppName { get { return "StoreAccountInfoApp"; } }
public static ICredentialsService CredentialsService { get; private set; }
public App ()
{
var account = AccountStore.Create().FindAccountsForService(App.AppName).FirstOrDefault();
CredentialsService = new CredentialsService();
if (CredentialsService.DoCredentialsExist())
{
InitializeComponent();
MainPage = new NavigationPage(new InterestM.MainMenu(account.Username.ToString()));
}
else
{
InitializeComponent();
MainPage = new NavigationPage(new InterestM.Accounts.Login());
}
}
protected override void OnStart ()
{
// Handle when your app starts
}
protected override void OnSleep ()
{
// Handle when your app sleeps
}
protected override void OnResume ()
{
// Handle when your app resumes
}
}
app.xaml.cs
public class MainActivity global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
Plugin.CurrentActivity.CrossCurrentActivity.Current.Activity = this;
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
LoadApplication(new App());
}
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Android.Content.PM.Permission[] grantResults)
{
PermissionsImplementation.Current.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
using InterestMatch.Inter;
using InterestMatch.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Xamarin.Auth;
using Xamarin.Forms;
namespace InterestM
{
public partial class App : Application
{
public static string AppName { get { return "StoreAccountInfoApp"; } }
public static ICredentialsService CredentialsService { get; private set; }
public App ()
{
var account = AccountStore.Create().FindAccountsForService(App.AppName).FirstOrDefault();
CredentialsService = new CredentialsService();
if (CredentialsService.DoCredentialsExist())
{
InitializeComponent();
MainPage = new NavigationPage(new InterestM.MainMenu(account.Username.ToString()));
}
else
{
InitializeComponent();
MainPage = new NavigationPage(new InterestM.Accounts.Login());
}
}
protected override void OnStart ()
{
// Handle when your app starts
}
protected override void OnSleep ()
{
// Handle when your app sleeps
}
protected override void OnResume ()
{
// Handle when your app resumes
}
}
}更改Android项目选项为我解决了这个问题
打开Android项目的属性。转到Android选项。将链接属性更改为“仅Sdk程序集”您能向我们展示您的App.xaml.cs吗?@Sven MichaelStübe我已经添加了App.xaml.cs文件