我的应用程序有两个 Android 主题。我想使用 attrs.xml 创建一个新的自定义颜色值引用,但这会使应用程序不断崩溃。
虽然我看到其他答案说它与他们一起工作得很好,就像这个一样: How to add custom item in android Theme declaration?
这是我的 style.xml
<resources>
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="newValue">@color/black</item>
</style>
<style name="Dark.AppTheme" parent="AppTheme">
<item name="colorPrimary">#000000</item>
<item name="colorPrimaryDark">#000000</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="newValue">@color/white</item>
</style>
</resources>
attrs.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<attr name="newValue" format="reference|color" />
</resources>
颜色.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#2196F3</color>
<color name="colorPrimaryDark">#3F51B5</color>
<color name="colorAccent">#FF9800</color>
<color name="white">#FFFFFF</color>
<color name="black">#000000</color>
</resources>
查看
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?newValue">
</RelativeLayout>
日志猫
java.lang.RuntimeException: Unable to create service com.moaness.servicetest.mainService: android.view.InflateException: Binary XML file line #9: Binary XML file line #9: Error inflating class <unknown>
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3453)
at android.app.ActivityThread.-wrap4(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1712)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:6701)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:249)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
Caused by: android.view.InflateException: Binary XML file line #9: Binary XML file line #9: Error inflating class <unknown>
Caused by: android.view.InflateException: Binary XML file line #9: Error inflating class <unknown>
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
.
.
.
Caused by: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 13: TypedValue{t=0x2/d=0x7f030140 a=-1}
at android.content.res.TypedArray.getDrawableForDensity(TypedArray.java:946)
at android.content.res.TypedArray.getDrawable(TypedArray.java:930)
at android.view.View.<init>(View.java:4738)
at android.view.ViewGroup.<init>(ViewGroup.java:597)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:248)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:244)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:240)
这段代码有什么问题?
最佳答案
根本问题是这样的:
UnsupportedOperationException: Failed to resolve attribute...
每当您在布局膨胀期间看到这一点时,这意味着布局中引用的某些属性(或其中的某些可绘制元素、颜色等)在 LayoutInflater
用于实例化 View
的 Context
主题中不可用。在本例中,Context
是一个Service
,并且默认情况下,Service
没有附加主题。
要解决此问题,只需将 Service
包装在 ContextThemeWrapper
中,并使用所需主题的适当 R.style
值,并从中获取 LayoutInflater
。例如:
ContextThemeWrapper ctw = new ContextThemeWrapper(MyService.this, R.style.AppTheme);
LayoutInflater inflater = LayoutInflater.from(ctw);
View layout = inflater.inflate(R.layout.service_layout, null);
<小时/>
另一个可能的选择是自己在 Service
上手动设置主题,这样就不再需要 ContextThemeWrapper
。例如:
@Override
public void onCreate() {
super.onCreate();
setTheme(R.style.AppTheme);
}
然后您可以直接从Service
获取它们LayoutInflater
;例如,
LayoutInflater inflater = LayoutInflater.from(MyService.this);
View layout = inflater.inflate(R.layout.service_layout, null);
理论上,这应该在任何地方都有效,但由于 Service
通常没有主题或管理 UI,因此考虑到自定义 Service
子类、制造商和自定义 ROM 修改等,我不确定它是否可以在每个环境中依赖。
事实上,我想说 ContextThemeWrapper
是更可靠的解决方案。
关于java - 无法使用自定义项目颜色设置服务布局样式,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57622360/