Warum Aktionsleiste Zurück Button Design ist gebrochen

Question

Ich bin neu in Android. Diese Aktivität ist eine übergeordnete Aktivität von MainActivity. Ich füge für diese Tätigkeit unter Leitung

getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
getSupportActionBar().setHomeButtonEnabled(true); 

Aber zurück Knopfentwurf geschah, wie die

Dieses activiy Desing wie unten

<?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/activity_detail_movie" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:fitsSystemWindows="true" 
tools:context="com.emrekose.cinefily.ui.activity.DetailMovieActivity"> 

<android.support.design.widget.AppBarLayout 
    android:id="@+id/movie_detail_appbar" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:fitsSystemWindows="true" 
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"> 

    <android.support.design.widget.CollapsingToolbarLayout 
     android:id="@+id/movie_detail_collapsing_toolbar" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:fitsSystemWindows="true" 
     app:contentScrim="?attr/colorPrimary" 
     app:layout_scrollFlags="scroll|exitUntilCollapsed"> 

     <ImageView 
      android:id="@+id/movie_detail_header_image" 
      android:layout_width="match_parent" 
      android:layout_height="250dp" 
      android:fitsSystemWindows="true" 
      android:scaleType="centerCrop" 
      app:layout_collapseMode="parallax" /> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_gravity="bottom" 
      android:background="#99000026" 
      android:orientation="horizontal" 
      android:weightSum="10"> 

      <ImageView 
       android:id="@+id/detail_movie_poster" 
       android:layout_width="90dp" 
       android:layout_height="110dp" 
       android:layout_margin="10dp" 
       android:layout_weight="1" 

       android:scaleType="centerInside" 
       android:src="@drawable/no_movie_image" /> 

      <LinearLayout 
       android:layout_width="wrap_content" 
       android:layout_height="match_parent" 
       android:layout_weight="9" 
       android:orientation="vertical"> 

       <TextView 
        android:id="@+id/detail_movie_name" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:ellipsize="marquee" 
        android:focusable="true" 
        android:focusableInTouchMode="true" 
        android:marqueeRepeatLimit="marquee_forever" 
        android:singleLine="true" 
        android:textColor="@android:color/white" 
        android:textSize="26sp" /> 

       <TextView 
        android:id="@+id/detail_movie_original_name" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:textSize="16sp" /> 

       <TextView 
        android:id="@+id/detail_movie_genres" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginTop="10dp" 
        android:singleLine="true" 
        android:textSize="14sp" /> 


      </LinearLayout> 

     </LinearLayout> 

     <android.support.v7.widget.Toolbar 
      android:id="@+id/movie_detail_toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      android:fitsSystemWindows="true" 
      android:gravity="top" 
      android:minHeight="?attr/actionBarSize" 
      app:layout_collapseMode="pin" 
      app:popupTheme="@style/ThemeOverlay.AppCompat.Light" /> 


    </android.support.design.widget.CollapsingToolbarLayout> 


    <android.support.design.widget.TabLayout 
     android:id="@+id/movie_detail_tabs" 
     android:layout_width="match_parent" 
     android:layout_height="?attr/actionBarSize" 
     android:layout_gravity="bottom" 
     app:tabIndicatorColor="@android:color/white" /> 

</android.support.design.widget.AppBarLayout> 

<android.support.v4.view.ViewPager 
    android:id="@+id/movie_detail_viewpager" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 

</android.support.design.widget.CoordinatorLayout> 

ich dieses Problem nicht lösen kann. Kann mir jemand helfen?

Answer 1

android:layout_height="?attr/actionBarSize" 

Ändern Sie diesen Zeilenwert auf Ihre Größe.