Question

我正在使用Xamarin开发一个android应用程序。

我正在创建类似于android Toast.MakeText()的自定义吐司消息。检查下面的我的C＃.NET代码：

var @params = new WindowManagerLayoutParams(
    ViewGroup.LayoutParams.WrapContent,
    ViewGroup.LayoutParams.WrapContent,
    WindowManagerTypes.Toast,
    WindowManagerFlags.NotFocusable | WindowManagerFlags.NotTouchable,
    Android.Graphics.Format.Translucent);

Android.Content.Res.Configuration config = activity.Resources.Configuration;

@params.Gravity = Gravity.GetAbsoluteGravity((GravityFlags.CenterHorizontal | GravityFlags.Bottom), (GravityFlags)config.LayoutDirection);
@params.X = 0;
@params.Y = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 64f, activity.Resources.DisplayMetrics);
@params.WindowAnimations = Android.Resource.Style.AnimationToast;
@params.PackageName = activity.PackageName;
@params.Token = activity.Window.Attributes.Token;

if ((@params.Gravity & GravityFlags.HorizontalGravityMask) == GravityFlags.FillHorizontal)
{
    @params.HorizontalWeight = 1.0f;
}

if ((@params.Gravity & GravityFlags.VerticalGravityMask) == GravityFlags.FillVertical)
{
    @params.VerticalWeight = 1.0f;
}

try
{
    activity.WindowManager.AddView(msg.MView, @params);
}
catch(System.Exception ex)
{
}

将视图添加到Windowmanager时，出现以下异常：

{Android.Views.WindowManagerBadTokenException：无法添加窗口-令牌android.os.BinderProxy@901e8d6无效；您的活动正在进行吗？在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）在[0x0000c]中：在<3cb12bce834a498199b2be6cd3e00922>：0中的Java.Interop.JniEnvironment + InstanceMethods.CallVoidMethod（Java.Interop.JniObjectReference实例，Java.Interop.JniMethodInfo方法，Java.Interop.JniArgumentValue * args）中[0x00069] 在Android.Runtime.JNIEnv.CallVoidMethod（System.IntPtr jobject，System.IntPtr jmethod，Android.Runtime.JValue * parms）中的[0x0000e]，在：0中在Android.Views.IWindowManagerInvoker.AddView中（Android.Views.View视图，Android.Views.ViewGroup + LayoutParams参数）在[0x0007c]中：: 0 在ToastCompat.cs：152中的GSP.Phone.Controls.ToastCompat + <> c__DisplayClass11_0.b__0（）[0x00162]处 ---托管的Android.Views.WindowManagerBadTokenException堆栈结束跟踪- android.view.WindowManager $ BadTokenException：无法添加窗口-令牌android.os.BinderProxy@901e8d6无效；您的活动正在进行吗？在android.view.ViewRootImpl.setView（ViewRootImpl.java:920）在android.view.WindowManagerGlobal.addView（WindowManagerGlobal.java:377）在android.view.WindowManagerImpl.addView（WindowManagerImpl.java:105）在mono.java.lang.RunnableImplementor.n_run（本地方法）在mono.java.lang.RunnableImplementor.run（RunnableImplementor.java:30）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6823）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1557）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1445） }

在我看来，将令牌分配给窗口管理器参数时出现了问题。我是否将正确的令牌值（activity.Window.Attributes.Token）分配给窗口管理器参数？

Answer 1

我已经安排好条件

override func viewDidLoad() {
    super.viewDidLoad()

    //based on the game title decide which game played
    if passedTitle == "Trivia" {
        questionAll = Trivia()
    }else if passedTitle == "Diy" {
        questionAll = Diy()
    }

    func process(answers: TypeOfAnswers) {
        if let points = questionAllInstance.answers["level\(level)"] {
            for singlePoint in points { // I replaced the forced unwrap to the optional binding above
                let sumGrade = singlePoint.reduce(0, {$0 + $1})
                totalGrade += sumGrade
            }
        }
    }

    switch questionAll {
    case let trivia as Trivia: process(answers: trivia.answers)
    case let diy as Diy: process(answers: diy.answers)
    default: break
    }

崩溃问题现在不再出现

Android.views.windowmanagerbadtokenexception：无法添加窗口-令牌android.os.binderproxy

1 个答案: