title: java.lang.RuntimeException: Unable to start activity ComponentInfo when using admob sdk
body: <p>I'm pretty sure this is nothing about the <code>Theme.AppCompat</code>, because the proguard-enabled app was originally works well without <code>com.google.android.gms:play-services-ads:7.5.0</code>, things went wrong after added <code>com.google.android.gms:play-services-ads:7.5.0</code>.</p>
  
  <p>With <code>com.google.android.gms:play-services-ads</code> included, it only works when proguard disabled.</p>
  
  <p>Can someone please help? I really hate java's inability in protecting source code and wish I could never use proguard.</p>
  
  <p><strong>Error Stack</strong></p>
  
  <blockquote>
    <p>FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start
    activity
    ComponentInfo{com.company.project/com.company.project.MainActivity}:
    java.lang.IllegalStateException: You need to use a Theme.AppCompat
    theme (or descendant) with this activity.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2463)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520)
        at android.app.ActivityThread.access$600(ActivityThread.java:162)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1366)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:158)
        at android.app.ActivityThread.main(ActivityThread.java:5751)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1083)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850)
        at dalvik.system.NativeStart.main(Native Method)  Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat
    theme (or descendant) with this activity.
        at android.support.v7.a.ae.q(Unknown Source)
        at android.support.v7.a.ae.p(Unknown Source)
        at android.support.v7.a.ae.a(Unknown Source)
        at android.support.v7.a.u.setContentView(Unknown Source)
        at com.company.project.MainActivity.onCreate(Unknown Source)
        at android.app.Activity.performCreate(Activity.java:5165)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1103)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2419)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520) 
        at android.app.ActivityThread.access$600(ActivityThread.java:162) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1366) 
        at android.os.Handler.dispatchMessage(Handler.java:99) 
        at android.os.Looper.loop(Looper.java:158) 
        at android.app.ActivityThread.main(ActivityThread.java:5751) 
        at java.lang.reflect.Method.invokeNative(Native Method) 
        at java.lang.reflect.Method.invoke(Method.java:511) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1083) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850) 
        at dalvik.system.NativeStart.main(Native Method)</p>
  </blockquote>
  
  <p><strong>Gradle:</strong></p>
  
  <pre><code>android {
      compileSdkVersion 23
      buildToolsVersion "23.0.2"
  
      defaultConfig {
          applicationId "com.company.project"
          minSdkVersion 15
          targetSdkVersion 23
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          debug {
          // proguard enabled for debug
              minifyEnabled true
              FileCollection proGuardFileCollection = files { file('./proguard').listFiles() }
              proguardFiles(proGuardFileCollection)
              proguardFiles getDefaultProguardFile('proguard-android.txt')
          }
          release {
              minifyEnabled true
              FileCollection proGuardFileCollection = files { file('./proguard').listFiles() }
              proguardFiles(proGuardFileCollection)
              proguardFiles getDefaultProguardFile('proguard-android.txt')
  
          }
      }
  }
  
  dependencies {
      compile project(':vitamio')
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:23.1.1'
      compile 'com.android.support:design:23.1.1'
      compile 'com.facebook.fresco:fresco:0.8.1'
      compile 'com.loopj.android:android-async-http:1.4.9'
      compile 'in.srain.cube:ultra-ptr:1.0.11'
      compile 'in.srain.cube:grid-view-with-header-footer:1.0.12'
  
      compile 'com.google.android.gms:play-services-ads:7.5.0'
  
      compile('com.crashlytics.sdk.android:crashlytics:2.5.5@aar') {
          transitive = true;
      }
  
  }
  
  buildscript {
      repositories {
          maven { url 'https://maven.fabric.io/public' }
      }
  
      dependencies {
          classpath 'io.fabric.tools:gradle:1.+'
      }
  }
  
  apply plugin: 'com.android.application'
  
  apply plugin: 'io.fabric'
  repositories {
      maven { url 'https://maven.fabric.io/public' }
  }
  </code></pre>
  
  <p><strong>AndroidManifes.xml:</strong></p>
  
  <p>
  
      
      
      
      
      
      
      </p>
  
  <pre><code>&lt;application
      android:allowBackup="true"
      android:icon="@mipmap/logo"
      android:label="@string/app_name"
      android:supportsRtl="true"
      android:theme="@style/AppTheme"&gt;
  
  &lt;!-- note: @style/AppTheme is defined as
  &lt;style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"&gt;
      &lt;item name="colorPrimary"&gt;@color/colorPrimary&lt;/item&gt;
      &lt;item name="colorPrimaryDark"&gt;@color/colorPrimaryDark&lt;/item&gt;
      &lt;item name="colorAccent"&gt;@color/colorAccent&lt;/item&gt;
  &lt;/style&gt; 
  --&gt;
  
      &lt;activity
          android:name=".MainActivity"
          android:label="@string/app_name"
          android:theme="@style/AppTheme.NoActionBar" &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=".VideoPlayerActivity" android:theme="@style/AppTheme.NoActionBar"/&gt;
      &lt;activity android:name=".VideoActivity" android:theme="@style/AppTheme.NoActionBar"/&gt;
  
      &lt;!--AdMob--&gt;
      &lt;meta-data android:name="com.google.android.gms.version"
          android:value="@integer/google_play_services_version"/&gt;
      &lt;activity android:name="com.google.android.gms.ads.AdActivity"
          android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
          android:theme="@android:style/Theme.Translucent" /&gt;
  
  
  &lt;/application&gt;
  </code></pre>
  
  <p></p>
  
  <p><strong>Proguard for admob (copied from admob's example on github):</strong></p>
  
  <pre><code># For Google Play Services
  -keep public class com.google.android.gms.ads.**{
     public *;
  }
  
  # For old ads classes
  -keep public class com.google.ads.**{
     public *;
  }
  
  # For mediation
  #-keepattributes *Annotation*
  
  # Other required classes for Google Play Services
  # Read more at http://developer.android.com/google/play-services/setup.html
  -keep class * extends java.util.ListResourceBundle {
     protected Object[][] getContents();
  }
  
  -keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable {
     public static final *** NULL;
  }
  
  -keepnames @com.google.android.gms.common.annotation.KeepName class *
  -keepclassmembernames class * {
     @com.google.android.gms.common.annotation.KeepName *;
  }
  
  -keepnames class * implements android.os.Parcelable {
     public static final ** CREATOR;
  }
  </code></pre>