我正在尝试实现我在 stackoverflow 上找到的 RobotoTextView，代码相当简单。
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;
}
}
这是 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>
和堆栈跟踪
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
我不知道问题出在哪里。人们在 stackoverflow 上发布的大多数问题通常都涉及缺少的构造函数。我把它们都包括在内，所以我不确定问题是什么。
编辑:这也可能是相关的，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>
最佳答案
事实证明，某些 ttf 文件的名称已更改。 RobotoTextView 类在尝试查找某些文件时遇到问题。此外，我的 attrs.xml 文件的格式为“枚举”，而实际上它应该是整数。
关于java - Android 错误膨胀类 <unknown>，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28388989/