LogCatには下記の記載があります。
09-24 13:25:20.041: E/Trace(967): error opening trace file: No such file or directory (2)
09-24 13:25:20.110: D/AndroidRuntime(967): Shutting down VM
09-24 13:25:20.110: W/dalvikvm(967): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
09-24 13:25:20.121: E/AndroidRuntime(967): FATAL EXCEPTION: main
09-24 13:25:20.121: E/AndroidRuntime(967): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.g/com.example.g.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.ActivityThread.access$600(ActivityThread.java:141)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.os.Handler.dispatchMessage(Handler.java:99)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.os.Looper.loop(Looper.java:137)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.ActivityThread.main(ActivityThread.java:5041)
09-24 13:25:20.121: E/AndroidRuntime(967): at java.lang.reflect.Method.invokeNative(Native Method)
09-24 13:25:20.121: E/AndroidRuntime(967): at java.lang.reflect.Method.invoke(Method.java:511)
09-24 13:25:20.121: E/AndroidRuntime(967): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
09-24 13:25:20.121: E/AndroidRuntime(967): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
09-24 13:25:20.121: E/AndroidRuntime(967): at dalvik.system.NativeStart.main(Native Method)
09-24 13:25:20.121: E/AndroidRuntime(967): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
09-24 13:25:20.121: E/AndroidRuntime(967): at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:110)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:57)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:99)
09-24 13:25:20.121: E/AndroidRuntime(967): at com.example.g.MainActivity.onCreate(MainActivity.java:12)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.Activity.performCreate(Activity.java:5104)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
09-24 13:25:20.121: E/AndroidRuntime(967): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
09-24 13:25:20.121: E/AndroidRuntime(967): ... 11 more
09-24 13:25:20.140: I/Process(967): Sending signal. PID: 967 SIG: 9
09-24 13:26:11.190: E/Trace(988): error opening trace file: No such file or directory (2)
09-24 13:26:11.449: D/AndroidRuntime(988): Shutting down VM
09-24 13:26:11.459: W/dalvikvm(988): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
09-24 13:26:11.479: E/AndroidRuntime(988): FATAL EXCEPTION: main
09-24 13:26:11.479: E/AndroidRuntime(988): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.g/com.example.g.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.ActivityThread.access$600(ActivityThread.java:141)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.os.Handler.dispatchMessage(Handler.java:99)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.os.Looper.loop(Looper.java:137)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.ActivityThread.main(ActivityThread.java:5041)
09-24 13:26:11.479: E/AndroidRuntime(988): at java.lang.reflect.Method.invokeNative(Native Method)
09-24 13:26:11.479: E/AndroidRuntime(988): at java.lang.reflect.Method.invoke(Method.java:511)
09-24 13:26:11.479: E/AndroidRuntime(988): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
09-24 13:26:11.479: E/AndroidRuntime(988): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
09-24 13:26:11.479: E/AndroidRuntime(988): at dalvik.system.NativeStart.main(Native Method)
09-24 13:26:11.479: E/AndroidRuntime(988): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
09-24 13:26:11.479: E/AndroidRuntime(988): at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:110)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:57)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:99)
09-24 13:26:11.479: E/AndroidRuntime(988): at com.example.g.MainActivity.onCreate(MainActivity.java:12)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.Activity.performCreate(Activity.java:5104)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
09-24 13:26:11.479: E/AndroidRuntime(988): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
09-24 13:26:11.479: E/AndroidRuntime(988): ... 11 more
09-24 13:26:17.899: I/Process(988): Sending signal. PID: 988 SIG: 9