Error : IllegalArgumentException: The style on this component requires your app theme to be Theme.MaterialComponents
Error : IllegalArgumentException: The style on this component requires your app theme to be Theme.MaterialComponents
下面是我的依赖项
implementation 'com.google.android.material:material:1.0.0'
implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
我的layout.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:fitsSystemWindows="true">
<com.google.android.material.bottomappbar.BottomAppBar
android:id="@+id/bottomBar"
style="@style/Widget.MaterialComponents.BottomAppBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:backgroundTint="@color/colorPrimary"
app:fabAlignmentMode="center"
app:fabCradleMargin="10dp"
app:fabCradleVerticalOffset="4dp"
app:navigationIcon="@drawable/ic_drawer" >
</com.google.android.material.bottomappbar.BottomAppBar>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="@id/bottomBar"
app:srcCompat="@drawable/ic_apps" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
上面的代码对我来说工作正常
但是当我更新 material design 的 dependencies
implementation 'com.google.android.material:material:1.1.0-alpha01'
我遇到以下错误：
java.lang.RuntimeException: Unable to start activity ComponentInfo{neel.com.bottomappbar/neel.com.bottomappbar.MainActivity}: android.view.InflateException: Binary XML file line #11: Binary XML file line #11: Error inflating class com.google.android.material.bottomappbar.BottomAppBar
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2485)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: android.view.InflateException: Binary XML file line #11: Binary XML file line #11: Error inflating class com.google.android.material.bottomappbar.BottomAppBar
at android.view.LayoutInflater.inflate(LayoutInflater.java:543)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at neel.com.bottomappbar.MainActivity.onCreate(MainActivity.kt:16)
at android.app.Activity.performCreate(Activity.java:6358)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2438)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class com.google.android.material.bottomappbar.BottomAppBar
at android.view.LayoutInflater.createView(LayoutInflater.java:649)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:768)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:708)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:839)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:802)
at android.view.LayoutInflater.inflate(LayoutInflater.java:519)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at neel.com.bottomappbar.MainActivity.onCreate(MainActivity.kt:16)
at android.app.Activity.performCreate(Activity.java:6358)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2438)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at android.view.LayoutInflater.createView(LayoutInflater.java:623)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:768)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:708)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:839)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:802)
at android.view.LayoutInflater.inflate(LayoutInflater.java:519)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at neel.com.bottomappbar.MainActivity.onCreate(MainActivity.kt:16)
at android.app.Activity.performCreate(Activity.java:6358)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2438)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: java.lang.IllegalArgumentException: The style on this component requires your app theme to be Theme.MaterialComponents (or a descendant).
at com.google.android.material.internal.ThemeEnforcement.checkTheme(ThemeEnforcement.java:240)
at com.google.android.material.internal.ThemeEnforcement.checkMaterialTheme(ThemeEnforcement.java:215)
at com.google.android.material.internal.ThemeEnforcement.checkCompatibleTheme(ThemeEnforcement.java:143)
at com.google.android.material.internal.ThemeEnforcement.obtainStyledAttributes(ThemeEnforcement.java:78)
at com.google.android.material.bottomappbar.BottomAppBar
material:1.1.0-alpha01
有一些问题
一个简单的解决方案是更改父主题
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
我们更改了 Gradle 依赖项和样式代码我的案例工作正常
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
<item name="android:activatedBackgroundIndicator">@drawable/drawer_list_selector</item>
<item name="android:textColorSecondary">@color/black_overlay</item>
<!--<item name="android:windowBackground">@drawable/nav_menu_background</item>-->
</style>
Gradle 依赖关系
implementation 'com.google.android.material:material:1.1.0-alpha06'
从 Material Components Bridge 主题扩展您的基本应用主题。它扩展了 AppCompat 主题，但添加了所有必要的东西。
<style name="Theme.MyApp" parent="Theme.MaterialComponents.Light.Bridge">
<!-- ... -->
</style>
Both Theme.MaterialComponents and Theme.MaterialComponents.Light have .Bridge themes:
Theme.MaterialComponents.Bridge
Theme.MaterialComponents.Light.Bridge
Theme.MaterialComponents.NoActionBar.Bridge
Theme.MaterialComponents.Light.NoActionBar.Bridge
Theme.MaterialComponents.Light.DarkActionBar.Bridge
它允许您继续使用最新版本的库，但避免了很多由于迁移到纯 Material 组件主题
而导致的 UI 问题
https://material.io/develop/android/docs/getting-started/#bridge-themes
|> 1: 在style.xml中定义如下样式:
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme -->
</style>
|> 2: 在 manifest.xml 文件中，使用上面的样式：
<application
android:hardwareAccelerated="true"
android:icon="@drawable/icon"
android:label="@string/app_name"
android:theme="@style/AppTheme"> <!-- IMPORTANT (This was my mistake) -->
</application>
|> 3: 为您的组件选择样式：
<com.google.android.material.bottomappbar.BottomAppBar
android:id="@+id/bottomBar"
style="@style/Widget.MaterialComponents.BottomAppBar"
...
>
</com.google.android.material.bottomappbar.BottomAppBar>
None 其中对我有用。必须做这两件事。
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme -->
</style>
和
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/nav_view"
app:theme="@style/Theme.MaterialComponents"
将主题直接添加到小部件也可以。例如：
<com.google.android.material.button.MaterialButtonToggleGroup
android:id="@+id/toggle_button_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:theme="@style/Theme.MaterialComponents.Light"> <======== THIS
检查最少。 SDK 版本21.
我在代码中创建芯片时遇到错误，这个问题导致应用程序停止工作，所以我通过创建一个上下文像您的 activity 名称这样的芯片解决了问题，如下所示
Chip chip = new Chip(YourNameActivity.this);
它对我有用，我的应用使用依赖项作为 com.google.android.material:material:1.4.0
如果您遇到此问题并且正在以编程方式实例化视图：
确保在需要 Context 实例时不要使用 getApplicationContext()，如果在匿名函数中则使用 this 或 HolderActivity.this（将 HolderActivity 替换为您自己的 activity） .
例如，我遇到了这个问题
CustomAlertDialogBuilder builder = new CustomAlertDialogBuilder(getApplicationContext());
我应该在哪里使用
CustomAlertDialogBuilder builder = new CustomAlertDialogBuilder(MyActivity.this);
我在测试 TextInputEditText 时遇到了这个问题，它位于具有父 样式的 TextInputLayout 中parent="Widget.MaterialComponents.TextInputLayout.OutlinedBox"
解决方案是在测试中添加主题如下
val scenario = launchFragmentInContainer<Fragment>(themeResId = R.style.Theme_APP)
你也可以给CoordinatorLayout添加主题，比如
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:theme="@style/Theme.MaterialComponents.Light.DarkActionBar.Bridge"
我遇到了这个问题并通过将主题“Theme.MaterialComponents.Light.NoActionBar”更改为“Theme.MaterialComponents.Light.NoActionBar.Bridge”解决了这个问题，这对我有用。
下面是我的依赖项
implementation 'com.google.android.material:material:1.0.0'
implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
我的layout.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:fitsSystemWindows="true">
<com.google.android.material.bottomappbar.BottomAppBar
android:id="@+id/bottomBar"
style="@style/Widget.MaterialComponents.BottomAppBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:backgroundTint="@color/colorPrimary"
app:fabAlignmentMode="center"
app:fabCradleMargin="10dp"
app:fabCradleVerticalOffset="4dp"
app:navigationIcon="@drawable/ic_drawer" >
</com.google.android.material.bottomappbar.BottomAppBar>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="@id/bottomBar"
app:srcCompat="@drawable/ic_apps" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
上面的代码对我来说工作正常
但是当我更新 material design 的 dependencies
implementation 'com.google.android.material:material:1.1.0-alpha01'
我遇到以下错误：
java.lang.RuntimeException: Unable to start activity ComponentInfo{neel.com.bottomappbar/neel.com.bottomappbar.MainActivity}: android.view.InflateException: Binary XML file line #11: Binary XML file line #11: Error inflating class com.google.android.material.bottomappbar.BottomAppBar
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2485)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: android.view.InflateException: Binary XML file line #11: Binary XML file line #11: Error inflating class com.google.android.material.bottomappbar.BottomAppBar
at android.view.LayoutInflater.inflate(LayoutInflater.java:543)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at neel.com.bottomappbar.MainActivity.onCreate(MainActivity.kt:16)
at android.app.Activity.performCreate(Activity.java:6358)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2438)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class com.google.android.material.bottomappbar.BottomAppBar
at android.view.LayoutInflater.createView(LayoutInflater.java:649)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:768)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:708)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:839)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:802)
at android.view.LayoutInflater.inflate(LayoutInflater.java:519)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at neel.com.bottomappbar.MainActivity.onCreate(MainActivity.kt:16)
at android.app.Activity.performCreate(Activity.java:6358)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2438)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at android.view.LayoutInflater.createView(LayoutInflater.java:623)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:768)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:708)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:839)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:802)
at android.view.LayoutInflater.inflate(LayoutInflater.java:519)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at neel.com.bottomappbar.MainActivity.onCreate(MainActivity.kt:16)
at android.app.Activity.performCreate(Activity.java:6358)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2438)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2545)
at android.app.ActivityThread.access00(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1396)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: java.lang.IllegalArgumentException: The style on this component requires your app theme to be Theme.MaterialComponents (or a descendant).
at com.google.android.material.internal.ThemeEnforcement.checkTheme(ThemeEnforcement.java:240)
at com.google.android.material.internal.ThemeEnforcement.checkMaterialTheme(ThemeEnforcement.java:215)
at com.google.android.material.internal.ThemeEnforcement.checkCompatibleTheme(ThemeEnforcement.java:143)
at com.google.android.material.internal.ThemeEnforcement.obtainStyledAttributes(ThemeEnforcement.java:78)
at com.google.android.material.bottomappbar.BottomAppBar
material:1.1.0-alpha01
一个简单的解决方案是更改父主题
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
我们更改了 Gradle 依赖项和样式代码我的案例工作正常
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
<item name="android:activatedBackgroundIndicator">@drawable/drawer_list_selector</item>
<item name="android:textColorSecondary">@color/black_overlay</item>
<!--<item name="android:windowBackground">@drawable/nav_menu_background</item>-->
</style>
Gradle 依赖关系
implementation 'com.google.android.material:material:1.1.0-alpha06'
从 Material Components Bridge 主题扩展您的基本应用主题。它扩展了 AppCompat 主题，但添加了所有必要的东西。
<style name="Theme.MyApp" parent="Theme.MaterialComponents.Light.Bridge">
<!-- ... -->
</style>
Both
Theme.MaterialComponentsandTheme.MaterialComponents.Lighthave.Bridgethemes:
Theme.MaterialComponents.Bridge
Theme.MaterialComponents.Light.Bridge
Theme.MaterialComponents.NoActionBar.Bridge
Theme.MaterialComponents.Light.NoActionBar.Bridge
Theme.MaterialComponents.Light.DarkActionBar.Bridge
它允许您继续使用最新版本的库，但避免了很多由于迁移到纯 Material 组件主题
而导致的 UI 问题https://material.io/develop/android/docs/getting-started/#bridge-themes
|> 1: 在style.xml中定义如下样式:
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme -->
</style>
|> 2: 在 manifest.xml 文件中，使用上面的样式：
<application
android:hardwareAccelerated="true"
android:icon="@drawable/icon"
android:label="@string/app_name"
android:theme="@style/AppTheme"> <!-- IMPORTANT (This was my mistake) -->
</application>
|> 3: 为您的组件选择样式：
<com.google.android.material.bottomappbar.BottomAppBar
android:id="@+id/bottomBar"
style="@style/Widget.MaterialComponents.BottomAppBar"
...
>
</com.google.android.material.bottomappbar.BottomAppBar>
None 其中对我有用。必须做这两件事。
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
<!-- Customize your theme -->
</style>
和
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/nav_view"
app:theme="@style/Theme.MaterialComponents"
将主题直接添加到小部件也可以。例如：
<com.google.android.material.button.MaterialButtonToggleGroup
android:id="@+id/toggle_button_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:theme="@style/Theme.MaterialComponents.Light"> <======== THIS
检查最少。 SDK 版本21.
我在代码中创建芯片时遇到错误，这个问题导致应用程序停止工作，所以我通过创建一个上下文像您的 activity 名称这样的芯片解决了问题，如下所示
Chip chip = new Chip(YourNameActivity.this);
它对我有用，我的应用使用依赖项作为 com.google.android.material:material:1.4.0
如果您遇到此问题并且正在以编程方式实例化视图：
确保在需要 Context 实例时不要使用 getApplicationContext()，如果在匿名函数中则使用 this 或 HolderActivity.this（将 HolderActivity 替换为您自己的 activity） .
例如，我遇到了这个问题
CustomAlertDialogBuilder builder = new CustomAlertDialogBuilder(getApplicationContext());
我应该在哪里使用
CustomAlertDialogBuilder builder = new CustomAlertDialogBuilder(MyActivity.this);
我在测试 TextInputEditText 时遇到了这个问题，它位于具有父 样式的 TextInputLayout 中parent="Widget.MaterialComponents.TextInputLayout.OutlinedBox"
解决方案是在测试中添加主题如下
val scenario = launchFragmentInContainer<Fragment>(themeResId = R.style.Theme_APP)
你也可以给CoordinatorLayout添加主题，比如
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:theme="@style/Theme.MaterialComponents.Light.DarkActionBar.Bridge"
我遇到了这个问题并通过将主题“Theme.MaterialComponents.Light.NoActionBar”更改为“Theme.MaterialComponents.Light.NoActionBar.Bridge”解决了这个问题，这对我有用。