“您需要在此活动中使用Theme.AppCompat主题（或后代）。”[重复](“You need to use a Theme.AppCompat theme (or descendant) wit

“您需要在此活动中使用Theme.AppCompat主题（或后代）。”[重复](“You need to use a Theme.AppCompat theme (or descendant) with this activity.” [duplicate])

这个问题在这里已经有了答案：

您需要使用Theme.AppCompat主题（或后代）与此活动 40个答案

我是Android编程的新手，我遇到了一个简单的XML问题。 我正在努力将我的空闲活动之一变成全屏活动。 我尝试将这行代码android：theme =“@ android：style / Theme.NoTitleBar.Fullscreen”添加到我的Android清单文件中，最终导致我的应用程序在启动时崩溃。

如果这也有帮助，我受影响的活动的java文件扩展了AppCompatActivity。 我看到一些其他帖子提到这会造成问题，但我无法解决我的问题。

请帮助我解决此问题，同时仍然使整个活动成为活动。 任何帮助表示赞赏。 谢谢！

XML

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/Theme.AppCompat.Light"> <activity android:name=".MainActivity" android:label="Marks Calculator"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.APP_CALCULATOR" /> </intent-filter> </activity> <activity android:name=".Home_Activity" android:label="Finite Time Manager"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.HOME" /> </intent-filter> </activity> <activity android:name=".Welcome_Activity" android:theme="@android:style/Theme.NoTitleBar.Fullscreen"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application>

错误logcat

12-22 12:21:30.214 32475-32475/com.managergmail.time.finite.finitemanager02 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.managergmail.time.finite.finitemanager02, PID: 32475 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.managergmail.time.finite.finitemanager02/com.managergmail.time.finite.finitemanager02.Welcome_Activity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2581) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2647) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:5763) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:888) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749) Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.support.v7.app.AppCompatDelegateImplV9.createSubDecor(AppCompatDelegateImplV9.java:359) at android.support.v7.app.AppCompatDelegateImplV9.ensureSubDecor(AppCompatDelegateImplV9.java:328) at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:289) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) at com.managergmail.time.finite.finitemanager02.Welcome_Activity.onCreate(Welcome_Activity.java:17) at android.app.Activity.performCreate(Activity.java:6280) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1116) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2534) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2647) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:5763) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:888) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749)

This question already has an answer here:

You need to use a Theme.AppCompat theme (or descendant) with this activity 44 answers

I am new to Android programming and I am running into a simple XML issue. I am in the process of trying to make one of my empty activities into a fullscreen activity. I tried adding this line of code android:theme="@android:style/Theme.NoTitleBar.Fullscreen" into my android manifest file, which ended up making my app crash on start.

If this also helps, my java file for the affected activity extends the AppCompatActivity. I saw some other posts that mentioned that this would create issues but I have not been able to fix my problem.

Please help me fix this issue while still making the activity fullscreen. Any help is appreciated. Thanks!

XML

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/Theme.AppCompat.Light"> <activity android:name=".MainActivity" android:label="Marks Calculator"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.APP_CALCULATOR" /> </intent-filter> </activity> <activity android:name=".Home_Activity" android:label="Finite Time Manager"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.HOME" /> </intent-filter> </activity> <activity android:name=".Welcome_Activity" android:theme="@android:style/Theme.NoTitleBar.Fullscreen"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application>

Error logcat

12-22 12:21:30.214 32475-32475/com.managergmail.time.finite.finitemanager02 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.managergmail.time.finite.finitemanager02, PID: 32475 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.managergmail.time.finite.finitemanager02/com.managergmail.time.finite.finitemanager02.Welcome_Activity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2581) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2647) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:5763) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:888) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749) Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.support.v7.app.AppCompatDelegateImplV9.createSubDecor(AppCompatDelegateImplV9.java:359) at android.support.v7.app.AppCompatDelegateImplV9.ensureSubDecor(AppCompatDelegateImplV9.java:328) at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:289) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) at com.managergmail.time.finite.finitemanager02.Welcome_Activity.onCreate(Welcome_Activity.java:17) at android.app.Activity.performCreate(Activity.java:6280) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1116) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2534) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2647) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:5763) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:888) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749)

最满意答案

您的Welcome_Activity可能会扩展AppCompatActivity因此主题应该是appcompat主题。

在你的styles.xml文件中输入：

<style name="AppTheme.FullScreen" parent="@style/Theme.AppCompat.Light"> <item name="windowNoTitle">true</item> <item name="windowActionBar">false</item> <item name="android:windowFullscreen">true</item> <item name="android:windowContentOverlay">@null</item> </style>

现在你可以使用这个主题：

<activity android:name=".Welcome_Activity" android:theme="@style/AppTheme.FullScreen"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity>

这将适用于此特定活动的全屏主题。 如果您想要整个应用程序的全屏，您可以使用此主题替换清单中的应用程序主题。

Your Welcome_Activity probably extends AppCompatActivity so the theme should be appcompat theme.

In your styles.xml file put this:

<style name="AppTheme.FullScreen" parent="@style/Theme.AppCompat.Light"> <item name="windowNoTitle">true</item> <item name="windowActionBar">false</item> <item name="android:windowFullscreen">true</item> <item name="android:windowContentOverlay">@null</item> </style>

Now you can use this theme:

<activity android:name=".Welcome_Activity" android:theme="@style/AppTheme.FullScreen"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity>

This will apply fullscreen theme for this particular activity. If you want full screen for whole application you can just replace the application theme in manifest with this theme.