我不知道为什么，但是我的类无法在XML中实例化。以下是我的代码。我尝试了一切，但似乎没有任何工作。尝试使缓存失效并重新启动，没有任何作用。
CustomFontTextView.java
public class CustomFontTextView extends TextView {
public static final String ANDROID_SCHEMA = "http://schemas.android.com/apk/res/android";
public CustomFontTextView(Context context) {
super(context);
applyCustomFont(context, null);
}
public CustomFontTextView(Context context, AttributeSet attrs) {
super(context, attrs);
applyCustomFont(context, attrs);
}
public CustomFontTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
applyCustomFont(context, attrs);
}
private void applyCustomFont(Context context, AttributeSet attrs) {
TypedArray attributeArray = context.obtainStyledAttributes(
attrs,
R.styleable.CustomFontTextView);
String fontName = attributeArray.getString(R.styleable.CustomFontTextView_font);
int textStyle = attrs.getAttributeIntValue(ANDROID_SCHEMA, "textStyle", Typeface.NORMAL);
Typeface customFont = selectTypeface(context, fontName, textStyle);
setTypeface(customFont);
attributeArray.recycle();
}
private Typeface selectTypeface(Context context, String fontName, int textStyle) {
if (fontName.contentEquals(context.getString(R.string.font_name_fontawesome))) {
return FontCache.getTypeface("fontawesome.ttf", context);
} else if (fontName.contentEquals(context.getString(R.string.font_name_source_sans_pro))) {
/*
information about the TextView textStyle:
http://developer.android.com/reference/android/R.styleable.html#TextView_textStyle
*/
switch (textStyle) {
case Typeface.BOLD: // bold
return FontCache.getTypeface("SourceSansPro-Bold.ttf", context);
case Typeface.ITALIC: // italic
return FontCache.getTypeface("SourceSansPro-Italic.ttf", context);
case Typeface.BOLD_ITALIC: // bold italic
return FontCache.getTypeface("SourceSansPro-BoldItalic.ttf", context);
case Typeface.NORMAL: // regular
default:
return FontCache.getTypeface("SourceSansPro-Regular.ttf", context);
}
} else {
// no matching font found
// return null so Android just uses the standard font (Roboto)
return null;
}
}
}
activity.main
<LinearLayout 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:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:text="Reenath"
android:textSize="18sp"/>
<com.trupik.virtualmall.activity.customfonts.CustomFontTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:text="Reenath"
android:textSize="18sp"
app:font="@string/font_name_source_sans_pro"/>
<com.trupik.virtualmall.activity.customfonts.CustomFontTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:text="Reenath"
android:textSize="18sp"
android:textStyle="bold"
app:font="@string/font_name_source_sans_pro"/>
<com.trupik.virtualmall.activity.customfonts.CustomFontTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:text="Reenath"
android:textSize="18sp"
android:textStyle="italic"
app:font="@string/font_name_fontawesome"/>
<com.trupik.virtualmall.activity.customfonts.CustomFontTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:text=""
android:textSize="18sp"
app:font="@string/font_name_fontawesome"/>
</LinearLayout>
异常
java.lang.NumberFormatException: For input string: "italic"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Long.parseLong(Long.java:441)
at com.android.internal.util.XmlUtils_Delegate.convertValueToInt(XmlUtils_Delegate.java:72)
at com.android.internal.util.XmlUtils.convertValueToInt(XmlUtils.java:93)
at android.util.BridgeXmlPullAttributes.getAttributeIntValue(BridgeXmlPullAttributes.java:134)
at com.android.layoutlib.bridge.android.BridgeXmlBlockParser.getAttributeIntValue(BridgeXmlBlockParser.java:436)
at com.trupik.virtualmall.activity.customfonts.CustomFontTextView.applyCustomFont(CustomFontTextView.java:41)
at com.trupik.virtualmall.activity.customfonts.CustomFontTextView.<init>(CustomFontTextView.java:26)
at sun.reflect.GeneratedConstructorAccessor481.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:458)
at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:158)
at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:103)
at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:168)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:247)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:171)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:835)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:811)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:223)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:426)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:510)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:498)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:888)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:498)
at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:72)
at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:610)
at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:607)
at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:362)
at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607)
at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.doRender(AndroidLayoutPreviewToolWindowManager.java:652)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.access$1700(AndroidLayoutPreviewToolWindowManager.java:80)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7$1.run(AndroidLayoutPreviewToolWindowManager.java:594)
at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:152)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:452)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:402)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:137)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7.run(AndroidLayoutPreviewToolWindowManager.java:589)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:351)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
答案 0 :(得分：0)
答案 1 :(得分：0)
问题来自xml中的以下行：
android:textStyle="italic"
所以很可能问题出在selectTypeface方法中。检查您是否在那里正确处理了italic。
问题应该解决，但如果问题仍然退出，我无法确切地告诉确切原因理论上它不应该创建问题，但由于它导致应用程序崩溃，你需要紧急修复它，可能有一个解决方法为了这。
在attrs文件中，在CustomFontTextView样式中添加以下属性：
<attr name="textStyle">
<flag name="normal" value="0" />
<flag name="bold" value="1" />
<flag name="italic" value="2" />
</attr>
在您的CustomFontTextView.java课程中，更改以下内容：
int textStyle = attrs.getAttributeIntValue(ANDROID_SCHEMA, "textStyle", Typeface.NORMAL);
到
int textStyle = attributeArray.getInt(R.styleable.CustomFontTextView_textStyle, Typeface.NORMAL);
在布局xml文件中，将所有android:textStyle更改为app:textStyle。希望解决方案适合您。