title: Android Studio change minSdk
body: <p>In android studio i have change AndroidManifest.xml minSdk into API 12, but still got error my style minimum require is API 11, and my currenct setting API is 8.</p>
  
  <p>AndroidManifext.xml</p>
  
  <pre><code>&lt;uses-sdk
      android:minSdkVersion="12"
      android:targetSdkVersion="17" /&gt;
  </code></pre>
  
  <p>My screenshot style that cause error:</p>
  
  <pre><code>&lt;resources&gt;
  
  &lt;!-- Base application theme. --&gt;
  &lt;style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"&gt;
      &lt;item name="android:titleTextStyle"&gt;&lt;/item&gt;
  &lt;/style&gt;
  
  &lt;/resources&gt;
  </code></pre>
  
  <p>Screenshot:<br>
  <img src="https://i.stack.imgur.com/D2KRY.png" alt="enter image description here"></p>
  
  <p>I have tried change minSdk and then rebuild the project but still got same error.<br>
  How is this happen? what i forgot to do? or this is a bug in android studio?<br>
  Currently i use android studio <strong>v0.3.2</strong></p>
  
  <hr>
  
  <p>Following @Wenhui comments i noticed i need to upade build.gradle too.<br>
  But still i got the same error, here is my current build.gradle  </p>
  
  <pre><code>buildscript {
  repositories {
      mavenCentral()
  }
  dependencies {
      classpath 'com.android.tools.build:gradle:0.6.+'
  }
  }
  apply plugin: 'android'
  
  repositories {
  mavenCentral()
  }
  
  android {
  compileSdkVersion 17
  buildToolsVersion "19.0.0"
  
  defaultConfig {
      minSdkVersion 12
      targetSdkVersion 17
  }
  buildTypes {
      release {
          runProguard false
          proguardFile getDefaultProguardFile('proguard-android.txt')
      }
  }
  productFlavors {
      defaultFlavor {
          proguardFile 'proguard-rules.txt'
      }
  }
  }
  
  dependencies {
  compile 'com.android.support:appcompat-v7:+'
  }
  </code></pre>