在android studio中运行应用程序时出错

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我是新的Android开发人员，我在设备中运行应用程序时遇到以下错误。任何人都可以请帮我关于下面的错误。您的帮助将不胜感激。在android studio中运行应用程序时出错

E/AndroidRuntime: FATAL EXCEPTION: main 
                   Process: test1.uitflashlight, PID: 28312 
                   java.lang.RuntimeException: Unable to start activity ComponentInfo{test1.uitflashlight/test1.uitflashlight.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. 
                    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2345) 
                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2405) 
                    at android.app.ActivityThread.access$800(ActivityThread.java:149) 
                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1324) 
                    at android.os.Handler.dispatchMessage(Handler.java:102) 
                    at android.os.Looper.loop(Looper.java:211) 
                    at android.app.ActivityThread.main(ActivityThread.java:5319) 
                    at java.lang.reflect.Method.invoke(Native Method) 
                    at java.lang.reflect.Method.invoke(Method.java:372) 
                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1016) 
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811) 
                    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 test1.uitflashlight.MainActivity.onCreate(MainActivity.java:23) 
                    at android.app.Activity.performCreate(Activity.java:5933) 
                    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 
                    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298) 
                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2405)  
                    at android.app.ActivityThread.access$800(ActivityThread.java:149)  
                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1324)  
                    at android.os.Handler.dispatchMessage(Handler.java:102)  
                    at android.os.Looper.loop(Looper.java:211)  
                    at android.app.ActivityThread.main(ActivityThread.java:5319)  
                    at java.lang.reflect.Method.invoke(Native Method)  
                    at java.lang.reflect.Method.invoke(Method.java:372)  
                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1016)  
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)

Manifest File

来源

2017-09-30 E1337K

的错误显示在由此造成的日志：java.lang.IllegalStateException：您需要使用Theme.AppCompat主题（或后代）与本次活动。

为主题，从Theme.AppCompat扩展了活动必须在AndroidManifest.xml中

android:theme="@style/Theme"

使用App.Theme或其后代

来源

2017-09-30 13:26:56

ü可以给我一些更多的信息像什么改变一个即时通讯一点英语不好：D – E1337K

在android studio中运行应用程序时出错

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