android hello world程序中的IllegalStateException

时间:2015-06-30 19:32:18

标签: android

我刚接触到android并刚刚开始在android studio 1.2.2上编写第一个hello world代码并在模拟器上运行(gennymotion)并且我正在获取 IllegalStateException 并且在模拟器中它正在显示

  

不幸的是你的应用已经停止了。

 java.lang.RuntimeException: Unable to start activity ComponentInfo{jewellers.am.com.amjewellers/jewellers.am.com.amjewellers.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            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:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
     Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

1 个答案:

答案 0 :(得分:0)

由于使用 AppCompat 主题,导致此错误:

您的申请主题必须是:

android:theme="@style/Theme.AppCompat.Light"

清单文件如下所示:

<application
   android:allowBackup="true"
   android:icon="@drawable/ic_launcher"
   android:label="@string/app_name"
   android:theme="@style/Theme.AppCompat.Light" >

确保您在项目中添加了 AppCompat v7 库,并且您必须扩展 ActionBarActivity

希望这会对你有所帮助。