我是Android编程的新手,我遇到了一个简单的XML问题。我正在尝试将我的一个空活动变为全屏活动。我尝试添加这行代码 机器人:主题= “@安卓风格/ Theme.NoTitleBar.Fullscreen” 进入我的Android清单文件,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。我看到其他一些帖子提到这会产生问题,但我无法解决我的问题。
请帮我解决此问题,同时仍然将活动设为全屏。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)
答案 0 :(得分:4)
您的Welcome_Activity
可能会延伸AppCompatActivity
,因此主题应为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>
这将为此特定活动应用全屏主题。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。
答案 1 :(得分:0)
您当前选择的主题(在欢迎活动中)不是appcompat主题。 例如,这应该工作:'
@风格/ Theme.AppCompat.Light.NoActionBar.FullScreen