title: Unfortunately My app has stopped [Android Emulator]
body: <p>While I am adding an Action bar, emulator will be displayed "Unfortunately MainActivity has stopped", even no error and installed</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="com.example.trintwo"     
        android:versionCode="1"
        android:versionName="1.0"&gt;
  &lt;uses-sdk
          android:minSdkVersion = "7"
          android:targetSdkVersion = "18" /&gt;
  
      &lt;application android:label="@string/app_name" android:icon="@drawable/ic_launcher"&gt;
          &lt;activity android:name="MainActivity"
                    android:label="@string/app_name"
                    android:theme="@style/Theme.Holo.Light"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
                  &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
  
          &lt;activity
                  android:name = "com.example.trintwo.DisplayMessageActivity"
                  android:label = "@string/title_activity_display_message"
                  android:parentActivityName = "com.example.trintwo.MainActivity"&gt;
                  &lt;meta-data
                          android:name = "android.support.PARENT_ACTIVITY"
                          android:value = "com.example.trintwo.MainActivity" /&gt;
          &lt;/activity&gt;
      &lt;/application&gt;
  &lt;/manifest&gt;
  </code></pre>
  
  <p>This is my res/values/styles.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;resources&gt;
  
  &lt;!--
      Base application theme for API 14+. This theme completely replaces
      AppBaseTheme from BOTH res/values/styles.xml and
      res/values-v11/styles.xml on API 14+ devices.
  --&gt;
          &lt;style name="AppBaseTheme" parent="android:Theme.Holo.Light"&gt;&lt;/style&gt;
          &lt;style name="CustomActionBarTheme"
                   parent="@android:style/Theme.Holo.Light.DarkActionBar"&gt;
  
          &lt;/style&gt;
  
  &lt;/resources&gt;
  </code></pre>
  
  <p>debug successfully
  and installed successfully
  but
  emulator show this "Unfortunately MainActivity has stopped"</p>
  
  <p>I am using terminal [not eclipse]</p>