我使用样式为OutlinedBox 的Material TextInputLayout
@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox
当启动模拟器"；不幸的是，已停止">
implementation 'com.google.android.material:material:1.2.0'
<com.google.android.material.textfield.TextInputLayout
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="15dp"
android:paddingRight="15dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Username"
android:inputType="text" />
</com.google.android.material.textfield.TextInputLayout>
错误运行活动日志
E/AndroidRuntime：致命异常：main流程：com.mcic.drawer，PID:8832java.lang.RuntimeException：无法启动活动ComponentInfo｛com.mcic.drawer/com.mcic.derawer.MainActivity｝：android.view.InflateException：二进制XML文件行#19：膨胀类com.google.android.material.textfield.TextInputLayout时出错在android.app.ActivityThread.performLaunchActivity(ActivityThreads.java：2325)在android.app.ActivityThread.handleLaunchActivity(ActivityThreads.java:2387)在android.app.ActivityThread.access上$800(ActivityThreads.java:151)在android.app.ActivityThread$H.handleMessage(ActivityThreads.java:1303)在android.os.Handler.dispatchMessage(Handler.java:102)在android.os.Looper.loop(Looper.java:135)在android.app.ActivityThread.main(ActivityThreads.java:5254)位于java.lang.reflect.Method.ioke(本机方法)位于java.lang.reflect.Method.ioke(Method.java:372)网址：com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)网址：com.android.internal.os.ZygoteInit.main(ZygoteNit.java:698)引起原因：android.view.InflateException：二进制XML文件行#19：膨胀类com.google.android.material.textfield.TextInputLayout时出错在android.view.LayoutInflater.createView(LayoutInflater.java:633)在android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)在android.view.LayoutInflater.rInflate(LayoutInflater.java:806)在android.view.LayoutInflater.inflature(LayoutInflater.java:504)在android.view.LayoutInflater.inflature(LayoutInflater.java:414)在android.view.LayoutInflater.inflature(LayoutInflater.java:365)位于androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDeleateImpl.java:696)位于androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:170)网址：com.mcic.drawer.MainActivity.onCreate(MainActivity.kt:9)在android.app.Activity.performCreate(Activity.java:5990)在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)在android.app.ActivityThread.performLaunchActivity(ActivityThreads.java:2278)在android.app.ActivityThread.handleLaunchActivity(ActivityThreads.java:2387)在android.app.ActivityThread.access上$800(ActivityThreads.java:151)在android.app.ActivityThread$H.handleMessage(ActivityThreads.java:1303)在android.os.Handler.dispatchMessage(Handler.java:102)在android.os.Looper.loop(Looper.java:135)在android.app.ActivityThread.main(ActivityThreads.java:5254)位于java.lang.reflect.Method.ioke(本机方法)位于java.lang.reflect.Method.ioke(Method.java:372)网址：com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)网址：com.android.internal.os.ZygoteInit.main(ZygoteNit.java:698)引起原因：java.lang.reflect.InvocationTargetException位于java.lang.reflect.Constructure.newInstance(本机方法)位于java.lang.reflect.Constructure.newInstance(Constructor.java:288)在android.view.LayoutInflater.createView(LayoutInflater.java:607)在android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)在android.view.LayoutInflater.rInflate(LayoutInflater.java:806)在android.view.LayoutInflater.inflature(LayoutInflater.java:504)在android.view.LayoutInflater.inflature(LayoutInflater.java:414)在android.view.LayoutInflater.inflature(LayoutInflater.java:365)位于androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDeleateImpl.java:696)位于androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:170)网址：com.mcic.drawer.MainActivity.onCreate(MainActivity.kt:9)在android.app.Activity.performCreate(Activity.java:5990)在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)在android.app.ActivityThread.performLaunchActivity(ActivityThreads.java:2278)在android.app.ActivityThread.handleLaunchActivity(ActivityThreads.java:2387)在android.app.ActivityThread.access上$800(ActivityThreads.java:151)在android.app.ActivityThread$H.handleMessage(ActivityThreads.java:1303)在android.os.Handler.dispatchMessage(Handler.java:102)在android.os.Looper.loop(Looper.java:135)在android.app.ActivityThread.main(ActivityThreads.java:5254)位于java.lang.reflect.Method.ioke(本机方法)位于java.lang.reflect.Method.ioke(Method.java:372)网址：com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)网址：com.android.internal.os.ZygoteInit.main(ZygoteNit.java:698)由：java.lang.IollegalArgumentException引起：此组件上的样式要求应用程序主题为theme.MaterialComponents(或子代)。网址：com.google.android.material.internal.ThemeEnforcement.checkTheme(ThemeEncement.java:248)网址：com.google.android.material.internal.ThemeEnforcement.checkMaterialTheme(ThemeEncement.java:222)网址：com.google.android.material.internal.ThemeEnforcement.checkCompatibleTheme(ThemeEncement.java:150)网址：com.google.android.material.internal.ThemeEnforcement.ugetableIntedStyledAttributes(ThemeEncement.java:120)网址：com.google.android.material.textfield.TextInputLayout.(TextInputLayout.java:424)网址：com.google.android.material.textfield.TextInputLayout.(TextInputLayout.java:396)位于java.lang.reflect.Constructure.newInstance(本机方法)位于java.lang.reflect.Constructure.newInstance(Constructor.java:288)在android.view.LayoutInflater.createView(LayoutInflater.java:607)在android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)在android.view.LayoutInflater.rInflate(LayoutInflater.java:806)在android.view.LayoutInflater.inflature(LayoutInflater.java:504)在android.view.LayoutInflater.inflature(LayoutInflater.java:414)在android.view.LayoutInflater.inflature(LayoutInflater.java:365)位于androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDeleateImpl.java:696)位于androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:170)网址：com.mcic.drawer.MainActivity.onCreate(MainActivity.kt:9)在android.app.Activity.performCreate(Activity.java:5990)在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)在android.app.ActivityThread.performLaunchActivity(ActivityThreads.java:2278)在android.app.ActivityThread.handleLaunchActivity(ActivityThreads.java:2387)在android.app.ActivityThread.access上$800(ActivityThreads.java:151)在android.app.ActivityThread$H.handleMessage(ActivityThreads.java:1303)在android.os.Handler.dispatchMessage(Handler.java:102)在android.os.Looper.loop(Looper.java:135)在android.app.ActivityThread.main(ActivityThreads.java:5254)位于java.lang.reflect.Method.ioke(本机方法)位于java.lang.reflect.Method.ioke(Method.java:372)网址：com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)网址：com.android.internal.os.ZygoteInit.main(ZygoteNit.java:698)
如果您查看运行输出，您将看到：
此组件上的样式要求您的应用程序主题主题材料成分
因此，我们可以更改从Theme.MaterialComponents:继承的应用程序主题
<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar.Bridge">
详细的解释在这里。