title: Error while running app in android studio
body: <p>I am new Android developer and I am facing below error while running my application in my device. Can anyone please help me regarding below error. Your help would be appreciated.</p>
  
  <pre><code>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) 
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/ec0wB.png" rel="nofollow noreferrer">Manifest File</a></p>