预览自定义 View 中的 Android ResourceNotFoundException

Question

我有一个自定义 View ，我们将其称为CustomView。在初始化时，我调用了以下方法

textPaint.setTypeface(ResourcesCompat.getFont(getContext(),R.font.pretty_font));

在应用程序中，此 View 工作完美，并且字体按应有的方式显示，但问题是 View 的预览不会在编辑器中加载，并包含以下详细信息:

android.content.res.Resources$NotFoundException: Font resource ID

0x7f090000 could not be retrieved.

at androidx.core.content.res.ResourcesCompat.loadFont(ResourcesCompat.java:365) at androidx.core.content.res.ResourcesCompat.getFont(ResourcesCompat.java:230) at com.mycompany.myapp.view.views.CustomView.init(CustomView.java:490) at com.mycompany.myapp.view.views.CustomView.initAttrs(CustomView.java:484) at com.mycompany.myapp.view.views.CustomView.(CustomView.java:116) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:403) at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:186) at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:144) at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:309) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:418) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:429) at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:333) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:863) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72) at android.view.LayoutInflater.rInflate(LayoutInflater.java:837) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:866) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72) at android.view.LayoutInflater.rInflate(LayoutInflater.java:837) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) 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:323) at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:394) at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:200) at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:572) at com.android.tools.idea.rendering.RenderTask.lambda$inflate$5(RenderTask.java:698) at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

为什么这个资源在编辑器中加载不出来，但在应用程序中运行却没有问题？仅供引用，MinSdk = 21 且 TargetSdk = 28

Answer 1

不要在设计模式下调用setTypeface。使用:

if (!isInEditMode()) {
textPaint.setTypeface(ResourcesCompat.getFont(getContext(),R.font.pretty_font))
}