Android錯誤膨脹類<unknown>

Question

我想實現一個RobotoTextView，我在這裏找到了stackoverflow，代碼是相當直接的。

public class RobotoTextView extends TextView { 

    private static final int TYPEFACE_COUNT = 16; 

    private final static int ROBOTO_THIN = 0; 
    private final static int ROBOTO_THIN_ITALIC = 1; 
    private final static int ROBOTO_LIGHT = 2; 
    private final static int ROBOTO_LIGHT_ITALIC = 3; 
    private final static int ROBOTO_REGULAR = 4; 
    private final static int ROBOTO_ITALIC = 5; 
    private final static int ROBOTO_MEDIUM = 6; 
    private final static int ROBOTO_MEDIUM_ITALIC = 7; 
    private final static int ROBOTO_BOLD = 8; 
    private final static int ROBOTO_BOLD_ITALIC = 9; 
    private final static int ROBOTO_BLACK = 10; 
    private final static int ROBOTO_BLACK_ITALIC = 11; 
    private final static int ROBOTO_CONDENSED = 12; 
    private final static int ROBOTO_CONDENSED_ITALIC = 13; 
    private final static int ROBOTO_CONDENSED_BOLD = 14; 
    private final static int ROBOTO_CONDENSED_BOLD_ITALIC = 15; 


    private static final SparseArray<Typeface> mTypefaces = new SparseArray<>(TYPEFACE_COUNT); 


    public RobotoTextView(Context context) { 
     super(context); 
    } 

    public RobotoTextView(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     parseAttributes(context, attrs); 
    } 

    public RobotoTextView(Context context, AttributeSet attrs, int defStyleAttr) { 
     super(context, attrs, defStyleAttr); 
     parseAttributes(context, attrs); 
    } 

    private void parseAttributes(Context context, AttributeSet attrs) { 
     TypedArray values = context.obtainStyledAttributes(attrs, R.styleable.RobotoTextView); 

     int typefaceValue = values.getInt(R.styleable.RobotoTextView_typeface, 0); 
     setTypeface(obtaintTypeface(context, typefaceValue)); 
     values.recycle(); 
    } 

    private Typeface obtaintTypeface(Context context, int typefaceValue) throws IllegalArgumentException { 
     Typeface typeface = mTypefaces.get(typefaceValue); 
     if (typeface == null) { 
      typeface = createTypeface(context, typefaceValue); 
      mTypefaces.put(typefaceValue, typeface); 
     } 
     return typeface; 
    } 

    private Typeface createTypeface(Context context, int typefaceValue) throws IllegalArgumentException { 
     Typeface typeface; 
     switch (typefaceValue) { 
      case ROBOTO_THIN: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Thin.ttf"); 
       break; 
      case ROBOTO_THIN_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-ThinItalic.ttf"); 
       break; 
      case ROBOTO_LIGHT: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Light.ttf"); 
       break; 
      case ROBOTO_LIGHT_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-LightItalic.ttf"); 
       break; 
      case ROBOTO_REGULAR: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Regular.ttf"); 
       break; 
      case ROBOTO_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Italic.ttf"); 
       break; 
      case ROBOTO_MEDIUM: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Medium.ttf"); 
       break; 
      case ROBOTO_MEDIUM_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-MediumItalic.ttf"); 
       break; 
      case ROBOTO_BOLD: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Bold.ttf"); 
       break; 
      case ROBOTO_BOLD_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-BoldItalic.ttf"); 
       break; 
      case ROBOTO_BLACK: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Black.ttf"); 
       break; 
      case ROBOTO_BLACK_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-BlackItalic.ttf"); 
       break; 
      case ROBOTO_CONDENSED: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Condensed.ttf"); 
       break; 
      case ROBOTO_CONDENSED_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-CondensedItalic.ttf"); 
       break; 
      case ROBOTO_CONDENSED_BOLD: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-BoldCondensed.ttf"); 
       break; 
      case ROBOTO_CONDENSED_BOLD_ITALIC: 
       typeface = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-BoldCondensedItalic.ttf"); 
       break; 
      default: 
       throw new IllegalArgumentException("Unknown `typeface` attribute value " + typefaceValue); 
     } 
     return typeface; 
    } 
    } 

這裏是XML

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 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="wrap_content" 
    android:background="@android:color/transparent"> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="72dp" 
     android:background="?attr/selectableItemBackground"> 

     <ImageView 
      android:id="@+id/icon" 
      android:layout_width="48dp" 
      android:layout_height="48dp" 
      android:layout_centerVertical="true" 
      android:layout_marginStart="8dp" 
      android:gravity="center" 
      android:padding="8dp" 
      android:scaleType="centerInside" 
      android:src="@drawable/ic_action_star_10" 
      android:visibility="invisible" /> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_marginStart="72dp" 
      android:layout_toStartOf="@+id/overflow" 
      android:gravity="center" 
      android:orientation="vertical"> 

      <!--<TextView--> 
      <!--android:id="@+id/editTextRoutineName"--> 
      <!--android:layout_width="match_parent"--> 
      <!--android:layout_height="wrap_content"--> 
      <!--android:text="Title"--> 
      <!--android:textColor="@color/textColorTitleDark"--> 
      <!--android:textAppearance="@style/TextAppearance.AppCompat.Title"/>--> 

      <!--<TextView--> 
      <!--android:id="@+id/subtitle"--> 
      <!--android:layout_width="match_parent"--> 
      <!--android:layout_height="wrap_content"--> 
      <!--android:text="Subtitle"--> 
      <!--android:maxLines="2"--> 
      <!--android:textColor="@color/textColorSubTitleDark"--> 
      <!--android:textAppearance="@style/TextAppearance.AppCompat.Subhead"/>--> 

      <TextView 
       android:id="@+id/subtitle" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:maxLines="2" 
       android:text="Subtitle" 
       android:textAppearance="@style/TextAppearance.AppCompat.Subhead" 
       android:textColor="@color/textColorSubTitleDark" /> 

      <com.periapsislabs.trackin.views.RobotoTextView 
       android:id="@+id/title" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       app:typeface="roboto_condensed_bold" /> 


     </LinearLayout> 


     <ImageView 
      android:id="@+id/overflow" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentEnd="true" 
      android:layout_alignParentStart="false" 
      android:layout_centerVertical="true" 
      android:background="?attr/selectableItemBackground" 
      android:padding="16dp" 
      android:src="@drawable/ic_action_overflow" 
      android:visibility="gone" /> 

     <View 
      android:id="@+id/divider" 
      android:layout_width="match_parent" 
      android:layout_height="1dp" 
      android:layout_alignParentBottom="true" 
      android:layout_marginStart="72dp" 
      android:background="@drawable/divider" 
      android:visibility="gone" /> 

    </RelativeLayout> 


</RelativeLayout> 

和堆棧跟蹤

android.view.InflateException: Binary XML file line #59: Error inflating class <unknown> 
      at android.view.LayoutInflater.createView(LayoutInflater.java:633) 
      at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) 
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 
      at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
      at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
      at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
      at com.periapsislabs.trackin.exercise.ExercisesFragment$ExerciseAdapter.onCreateViewHolder(ExercisesFragment.java:227) 
      at com.periapsislabs.trackin.exercise.ExercisesFragment$ExerciseAdapter.onCreateViewHolder(ExercisesFragment.java:210) 
      at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:4121) 
      at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3431) 
      at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3340) 
      at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1810) 
      at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1306) 
      at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1269) 
      at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:523) 
      at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:1988) 
      at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:2237) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573) 
      at android.widget.FrameLayout.onLayout(FrameLayout.java:508) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573) 
      at android.widget.FrameLayout.onLayout(FrameLayout.java:508) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:890) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573) 
      at android.widget.FrameLayout.onLayout(FrameLayout.java:508) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) 
      at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) 
      at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573) 
      at android.widget.FrameLayout.onLayout(FrameLayout.java:508) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) 
      at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) 
      at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573) 
      at android.widget.FrameLayout.onLayout(FrameLayout.java:508) 
      at android.view.View.layout(View.java:15596) 
      at android.view.ViewGroup.layout(ViewGroup.java:4966) 
      at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2072) 
      at android.view.ViewRootImp 

我想不通的問題是什麼。人們在stackoverflow上發佈的大多數問題通常都包含缺少的construtor。我有他們全部包括在內，所以我不知道問題是什麼。

編輯：這也可能是相關的，我的attrs.xml文件。

<declare-styleable name="RobotoTextView"> 
     <attr name="typeface"/> 
    </declare-styleable> 

    <attr name="typeface" format="enum"> 
     <enum name="roboto_thin" value="0"/> 
     <enum name="roboto_thin_italic" value="1"/> 
     <enum name="roboto_light" value="2"/> 
     <enum name="roboto_light_italic" value="3"/> 
     <enum name="roboto_regular" value="4"/> 
     <enum name="roboto_italic" value="5"/> 
     <enum name="roboto_medium" value="6"/> 
     <enum name="roboto_medium_italic" value="7"/> 
     <enum name="roboto_bold" value="8"/> 
     <enum name="roboto_bold_italic" value="9"/> 
     <enum name="roboto_black" value="10"/> 
     <enum name="roboto_black_italic" value="11"/> 
     <enum name="roboto_condensed" value="12"/> 
     <enum name="roboto_condensed_italic" value="13"/> 
     <enum name="roboto_condensed_bold" value="14"/> 
     <enum name="roboto_condensed_bold_italic" value="15"/> 
    </attr> 

Answer 1

事實證明ttf文件的一些名稱已被更改。 RobotoTextView類在試圖找到一些文件時遇到了問題。另外，我的attrs.xml文件的格式爲「enum」，實際上它應該是整數。