material-components / material-components/material-components-android
[TimePicker] UnsupportedOperationException: Failed to resolve attribute at index 0
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Description
**Description:** When the time picker opens, the following warning appears:
```
Failed to inflate ColorStateList, leaving it to the framework
java.lang.UnsupportedOperationException: Failed to resolve attribute at index 0: TypedValue{t=0x2/d=0x7f040115 a=-1}, theme={InheritanceMap=[id=0x7f1203e7io.material.catalog:style/ThemeOverlay.MaterialComponents.TimePicker.Display], Themes=[io.material.catalog:style/ThemeOverlay.MaterialComponents.TimePicker.Display, forced, io.material.catalog:style/ThemeOverlay.Material3.MaterialTimePicker, forced, io.material.catalog:style/Theme.Catalog, forced, io.material.catalog:style/Theme.AppCompat.Empty, forced, android:style/Theme.DeviceDefault.Light.DarkActionBar, forced]}
at android.content.res.TypedArray.getColor(TypedArray.java:536)
at androidx.core.content.res.ColorStateListInflaterCompat.inflate(ColorStateListInflaterCompat.java:157)
at androidx.core.content.res.ColorStateListInflaterCompat.createFromXmlInner(ColorStateListInflaterCompat.java:122)
at androidx.core.content.res.ColorStateListInflaterCompat.createFromXml(ColorStateListInflaterCompat.java:102)
at androidx.core.content.res.ResourcesCompat.inflateColorStateList(ResourcesCompat.java:259)
at androidx.core.content.res.ResourcesCompat.getColorStateList(ResourcesCompat.java:234)
at androidx.core.content.ContextCompat.getColorStateList(ContextCompat.java:516)
at androidx.appcompat.content.res.AppCompatResources.getColorStateList(AppCompatResources.java:46)
at com.google.android.material.resources.MaterialResources.getColorStateList(MaterialResources.java:64)
at com.google.android.material.button.MaterialButton.(MaterialButton.java:319)
at com.google.android.material.button.MaterialButton.(MaterialButton.java:288)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:743)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:895)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:850)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1012)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:973)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:1148)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1008)
at android.view.LayoutInflater.inflate(LayoutInflater.java:541)
at android.view.LayoutInflater.inflate(LayoutInflater.java:462)
at android.view.LayoutInflater.inflate(LayoutInflater.java:413)
at com.google.android.material.timepicker.TimePickerView.(TimePickerView.java:107)
at com.google.android.material.timepicker.TimePickerView.(TimePickerView.java:102)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:743)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:895)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:850)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1012)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:973)
at android.view.LayoutInflater.inflate(LayoutInflater.java:571)
at android.view.LayoutInflater.inflate(LayoutInflater.java:462)
at android.view.LayoutInflater.inflate(LayoutInflater.java:413)
at com.google.android.material.timepicker.MaterialTimePicker.onCreateView(MaterialTimePicker.java:274)
at androidx.fragment.app.Fragment.performCreateView(Fragment.java:3104)
at androidx.fragment.app.DialogFragment.performCreateView(DialogFragment.java:510)
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:524)
at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1899)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1823)
at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1729)
at androidx.fragment.app.BackStackRecord.commitNow(BackStackRecord.java:317)
at androidx.fragment.app.DialogFragment.showNow(DialogFragment.java:300)
at io.material.catalog.timepicker.TimePickerMainDemoFragment.lambda$onCreateDemoView$3$io-material-catalog-timepicker-TimePickerMainDemoFragment(TimePickerMainDemoFragment.java:128)
at io.material.catalog.timepicker.TimePickerMainDemoFragment$$ExternalSyntheticLambda3.onClick(D8$$SyntheticClass:0)
at android.view.View.performClick(View.java:8229)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1731)
at android.view.View.performClickInternal(View.java:8206)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:32007)
at android.os.Handler.handleCallback(Handler.java:1095)
at android.os.Handler.dispatchMessageImpl(Handler.java:135)
at android.os.Handler.dispatchMessage(Handler.java:125)
at android.os.Looper.loopOnce(Looper.java:269)
at android.os.Looper.loop(Looper.java:367)
at android.app.ActivityThread.main(ActivityThread.java:9333)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:566)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:929)
```
**Material Library version:** 1.14.0-alpha10
**Device:** Pixel 8 (API 36)
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the warning when opening MaterialTimePicker on a Pixel 8 running API 36 with Material Library 1.14.0-alpha10. Start by tracing inflation through MaterialTimePicker.onCreateView, TimePickerView, and MaterialButton, then identify the unresolved attribute and verify that opening the picker no longer emits the exception.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, java
- Domain
- mobile-dev
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100