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01-08 04:49:31.229: E/AndroidRuntime(4688): FATAL EXCEPTION: main

01-08 04:49:31.229: E/AndroidRuntime(4688): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.iweixin/com.example.iweixin.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.app.ActivityThread.access$1500(ActivityThread.java:117)

日志有點亂

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.os.Handler.dispatchMessage(Handler.java:99)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.os.Looper.loop(Looper.java:130)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.app.ActivityThread.main(ActivityThread.java:3683)

01-08 04:49:31.229: E/AndroidRuntime(4688): at java.lang.reflect.Method.invokeNative(Native Method)

01-08 04:49:31.229: E/AndroidRuntime(4688): at java.lang.reflect.Method.invoke(Method.java:507)

01-08 04:49:31.229: E/AndroidRuntime(4688): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)

01-08 04:49:31.229: E/AndroidRuntime(4688): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)

01-08 04:49:31.229: E/AndroidRuntime(4688): at dalvik.system.NativeStart.main(Native Method)

01-08 04:49:31.229: E/AndroidRuntime(4688): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:110)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:99)

01-08 04:49:31.229: E/AndroidRuntime(4688): at com.example.iweixin.MainActivity.onCreate(MainActivity.java:17)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

01-08 04:49:31.229: E/AndroidRuntime(4688): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)

01-08 04:49:31.229: E/AndroidRuntime(4688): ... 11 more

總結

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