Tabs Absturz-App in Android-Version unter Lollipop

Question

Ich habe eine Aktivität mit Tabs Setup und die Registerkarten verwendet eine Ansicht Pager zu arbeiten, und hier ist das Problem, es funktioniert gut auf Lollipop, Marshmallow und Nougat aber nichts unter 5,0 die App abstürzt, ich Ich weiß nicht, was diesen Fehler verursachen könnte. Hier ist meine Haupttätigkeit Layout mit dem Reiter:

<?xml version="1.0" encoding="utf-8"?> 
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/main_content" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
    <android.support.design.widget.AppBarLayout 
     android:id="@+id/appbar" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:theme="@android:style/ThemeOverlay.Material.Light"> 
     <android.support.v7.widget.Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      android:background="?attr/colorPrimary" 
      app:popupTheme="@style/ThemeOverlay.AppCompat.Light" 
      app:titleTextColor="@android:color/black" 
      app:titleTextAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Title" 
      app:layout_scrollFlags="scroll|enterAlways|snap" /> 
     <include 
      android:id="@+id/tabs" 
      layout="@layout/tabs" /> 
    </android.support.design.widget.AppBarLayout> 
    <android.support.v4.view.ViewPager 
     android:id="@+id/viewpager" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 
    <android.support.design.widget.FloatingActionButton 
     android:id="@+id/mainFAB" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_margin="@dimen/fab_margin" 
     android:clickable="true" 
     android:layout_gravity="bottom|end" 
     app:fabSize="normal" 
     app:srcCompat="@drawable/ic_edit" /> 
</android.support.design.widget.CoordinatorLayout> 

und hier meine OnCreate Methode:

protected override void OnCreate(Bundle savedInstanceState) 
     { 
      base.OnCreate(savedInstanceState); 

      _adapter = new TabsAdapter(this, SupportFragmentManager); 
      _pager = FindViewById<ViewPager>(Resource.Id.viewpager); 
      var tabs = FindViewById<TabLayout>(Resource.Id.tabs); 

      _pager.Adapter = _adapter; 
      tabs.SetupWithViewPager(_pager); 

      _pager.OffscreenPageLimit = 5; 

      SupportActionBar.SetDisplayHomeAsUpEnabled(false); 
      SupportActionBar.SetHomeButtonEnabled(false); 
     } 

ich Xamarin.Android bin mit. Dies ist der Fehler:

Android.Views.InflateException: Binary XML file line #1: Error inflating class android.support.design.widget.TabLayout 

die Fehlerausgabe:

[ERROR] FATAL UNHANDLED EXCEPTION: Android.Views.InflateException: Binary XML file line #1: Error inflating class android.support.design.widget.TabLayout ---> Java.Lang.Reflect.InvocationTargetException: Exception of type 'Java.Lang.Reflect.InvocationTargetException' was thrown. ---> Java.Lang.UnsupportedOperationException: Can't convert to color: type=0x2 
08-04 13:06:47.696 E/mono-rt (1291): --- End of inner exception stack trace --- 
08-04 13:06:47.696 E/mono-rt (1291): --- End of inner exception stack trace --- 
08-04 13:06:47.696 E/mono-rt (1291): --- End of managed Android.Views.InflateException stack trace --- 
08-04 13:06:47.696 E/mono-rt (1291): android.view.InflateException: Binary XML file line #1: Error inflating class android.support.design.widget.TabLayout 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.createView(LayoutInflater.java:620) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.parseInclude(LayoutInflater.java:816) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.rInflate(LayoutInflater.java:745) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
08-04 13:06:47.696 E/mono-rt (1291): at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292) 
08-04 13:06:47.696 E/mono-rt (1291): at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
08-04 13:06:47.696 E/mono-rt (1291): at md52271f797d1fff0147ee94ae02da80c1d.MainActivity.n_onCreate(Native Method) 
08-04 13:06:47.696 E/mono-rt (1291): at md52271f797d1fff0147ee94ae02da80c1d.MainActivity.onCreate(MainActivity.java:31) 
08-04 13:06:47.696 E/mono-rt (1291): at android.app.Activity.performCreate(Activity.java:5231) 
08-04 13:06:47.696 E/mono-rt (1291): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
08-04 13:06:47.696 E/mono-rt (1291): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
08-04 13:06:47.696 E/mono-rt (1291): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
08-04 13:06:47.696 E/mono-rt (1291): at android.app.ActivityThread.access$800(ActivityThread.java:135) 
08-04 13:06:47.696 E/mono-rt (1291): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
08-04 13:06:47.696 E/mono-rt (1291): at android.os.Handler.dispatchMessage.Constructor.constructNative(Native Method) 
08-04 13:06:47.696 E/mono-rt (1291): at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
08-04 13:06:47.696 E/mono-rt (1291): at android.view.LayoutInflater.createView(LayoutInflater.java:594)(Handler.java:102) 
08-04 13:06:47.696 E/mono-rt (1291): at android.os.Looper.loop(Looper.java:136) 
08-04 13:06:47.696 E/mono-rt (1291): at android.app.ActivityThread.main(ActivityThread.java:5001) 
08-04 13:06:47.696 E/mono-rt (1291): at java.lang.reflect.Method.invokeNative(Native Method) 
08-04 13:06:47.696 E/mono-rt (1291): at java.lang.reflect.Method.invoke(Method.java:515) 
08-04 13:06:47.696 E/mono-rt (1291): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
08-04 13:06:47.696 E/mono-rt (1291): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
08-04 13:06:47.696 E/mono-rt (1291): at dalvik.system.NativeStart.main(Native Method) 
08-04 13:06:47.696 E/mono-rt (1291): Caused by: java.lang.reflect.InvocationTargetException 
08-04 13:06:47.696 E/mono-rt (1291): at java.lang.reflect 

Answer 1

Ich glaube, das Problem ist, android:background="?attr/colorPrimary". Ich denke, das wurde in Android 5.0 eingeführt. Sie könnten entweder eine @color/foo aus Ihrer Farbpalette hart codieren oder Stile für Android-Versionen in Ihrer styles.xml einrichten.

Answer 2

Endlich einen Weg um es herum, neben dem attr? Feature, das war auch ein Problem

<android.support.design.widget.AppBarLayout 
     android:id="@+id/appbar" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:theme="@android:style/ThemeOverlay.Material.Light"> 

Im Themen Eigenschaft, habe ich es zu

android:theme="@style/ThemeOverlay.Material.Light"> 

Sie wissen nicht, warum es funktioniert, aber das machte es funktionieren. Wenn jemand erklären kann, warum es funktioniert, werde ich mich freuen.