我被异常已经在抛出通过调用的目标xamarin.android

Question

变种mToolbar = FindViewById（Resource.Id.toolbar）;异常已经 由调用

的目标抛出

DrawerLayout drawerLayout; 
 
    NavigationView navigationView; 
 
    protected override void OnCreate (Bundle savedInstanceState) 
 
    { 
 
     base.OnCreate (savedInstanceState); 
 

 
     // Set our view from the "main" layout resource 
 
     //ActionBar.NavigationMode = ActionBarNavigationMode.Tabs; 
 
     SetContentView (Resource.Layout.Main); 
 

 

 
     var mToolbar= FindViewById<Toolbar> (Resource.Id.toolbar); 
 
     //Toolbar will now take on default action bar chacracteritics 
 
     SetActionBar(mToolbar); 
 
     ActionBar.Title = "home"; 
 

 

 

 

 
     //Enable suppport action bar to display hamburger 
 
     ActionBar.SetHomeAsUpIndicator(Resource.Drawable.icon_hambuger); 
 
     ActionBar.SetDisplayHomeAsUpEnabled (true); 
 

 
     //Set menu hambuger 
 
     ActionBar.SetHomeAsUpIndicator (Resource.Drawable.icon_home); 
 
     ActionBar.SetDisplayHomeAsUpEnabled (true); 
 

 
     drawerLayout = FindViewById<DrawerLayout> (Resource.Id.drawer_layout); 
 
     navigationView = FindViewById<NavigationView> (Resource.Id.nav_view); 
 

 
     navigationView.NavigationItemSelected += (sender, e) => { 
 
      e.MenuItem.SetChecked (true); 
 
      //react to click here and swap fragments or navigate 
 
      drawerLayout.CloseDrawers(); 
 
     }; 
 

 

 

 

 
     // Add tabs to tabbar 
 

 

 

 
     //AddTab ("Genres", new GenerFragment()); 
 
     //AddTab ("Explore", new ExploreFragment()); 
 
     //AddTab ("Audio", new AudioFragment()); 
 

 
    } 
 

 

 
    //Event Selected on nav menu 
 
    public override bool OnOptionsItemSelected (IMenuItem item) 
 
    { 
 
     switch (item.ItemId) 
 
     { 
 
     case Android.Resource.Id.Home: 
 
      drawerLayout.OpenDrawer (Android.Support.V4.View.GravityCompat.Start); 
 
      return true; 
 
     } 
 
     return base.OnOptionsItemSelected (item); 
 
    } 
 

 
    // Add options menu on toolbar 
 

 
    public override bool OnCreateOptionsMenu(Android.Views.IMenu menu) 
 
    { 
 
     MenuInflater.Inflate (Resource.Menu.Action_menu, menu); 
 
     return base.OnCreateOptionsMenu (menu); 
 
    }

<?xml version="1.0" encoding="utf-8"?> 
 
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
 
    android:layout_width="match_parent" 
 
    android:layout_height="match_parent" 
 
    android:fitsSystemWindows="true" 
 
    android:id="@+id/drawer_layout"> 
 
    <RelativeLayout 
 
     android:layout_width="match_parent" 
 
     android:layout_height="match_parent"> 
 
     <Toolbar 
 
      android:id="@+id/toolbar" 
 
      android:layout_width="match_parent" 
 
      android:layout_height="wrap_content" 
 
      android:minHeight="?attr/actionBarSize" 
 
      android:background="?attr/colorPrimary" 
 
      android:titleTextColor="@android:color/background_light" /> 
 
     <LinearLayout 
 
      android:layout_width="match_parent" 
 
      android:layout_height="match_parent" 
 
      android:orientation="vertical" /> 
 
    </RelativeLayout> 
 
    <android.support.design.widget.NavigationView 
 
     android:id="@+id/nav_view" 
 
     android:layout_height="match_parent" 
 
     android:layout_width="wrap_content" 
 
     android:layout_gravity="start" 
 
     app:headerLayout="@layout/drawer_header" 
 
     app:menu="@menu/navmenu" /> 
 
</android.support.v4.widget.DrawerLayout>

Xamarin.android到目前为止有更多的问题。我不知道错误在哪里。我修复了旧错误，然后显示新错误。@@ 。如何解决它。谢谢。

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidProgramException: Missing or incorrect header for method .ctor 
 
at at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (System.Reflection.MonoCMethod,object,object[],System.Exception&) 
 
at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00002] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:644 
 
--- End of inner exception stack trace --- 
 
at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00016] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:650 
 
at System.Reflection.MonoCMethod.DoInvoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00089] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:635 
 
at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:663 
 
at System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) [0x00000] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/corlib/System.Reflection/ConstructorInfo.cs:62 
 
at Java.Interop.TypeManager.CreateProxy (System.Type type, IntPtr handle, JniHandleOwnership transfer) [0x00059] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/src/Java.Interop/TypeManager.cs:303 
 
at Java.Interop.TypeManager.CreateInstance (IntPtr handle, JniHandleOwnership transfer, System.Type targetType) [0x0012c] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/src/Java.Interop/TypeManager.cs:277 
 
at Java.Lang.Object.GetObject (IntPtr handle, JniHandleOwnership transfer, System.Type type) [0x000e5] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/src/Java.Lang/Object.cs:371 
 
at Java.Lang.Object.GetObject[T] (IntPtr handle, JniHandleOwnership transfer) [0x0001a] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/src/Java.Lang/Object.cs:342 
 
at Java.Lang.Object.GetObject[T] (IntPtr handle, JniHandleOwnership transfer) [0x00000] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/src/Java.Lang/Object.cs:334 
 
at Android.App.Activity.FindViewById (Int32 id) [0x00077] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/platforms/android-23/src/generated/Android.App.Activity.cs:1939 
 
at Android.App.Activity.FindViewById[T] (Int32 id) [0x00000] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/src/Android.App/Activity.cs:12 
 
at SoundCloud.MainActivity.OnCreate (Android.OS.Bundle savedInstanceState) [0x00019] in /Users/hoanglethien/Desktop/SoundCloud/SoundCloud/MainActivity.cs:29 
 
at Android.App.Activity.n_OnCreate_Landroid_os_Bundle (IntPtr jnienv, IntPtr native__this, IntPtr native_savedInstanceState) [0x00011] in /Users/builder/data/lanes/3053/a94a03b5/source/monodroid/src/Mono.Android/platforms/android-23/src/generated/Android.App.Activity.cs:2857 
 
at at (wrapper dynamic-method) System.Object:d02a4f71-fdeb-4fc8-8465-eedc540c9cd9 (intptr,intptr,intptr)

Answer 1

看起来你正在使用的向后兼容支持设计库。尝试在你的AppBarLayout中包装你的工具栏，如下所示：

<android.support.design.widget.AppBarLayout 
     android:layout_height="wrap_content" 
     android:layout_width="match_parent" 
     android:id="@+id/toolbar_layout"> 
     <Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:minHeight="?attr/actionBarSize" 
      android:background="?attr/colorPrimary" 
      android:titleTextColor="@android:color/background_light" /> 
</android.support.design.widget.AppBarLayout>