title: A newer version of com.android.support:appcompat-v7 than 23.2.1 is available: 24.0.0-alpha1
body: <p>Appears the following error  </p>
  
  <blockquote>
    <p>A newer version of com.android.support:appcompat-v4 than 23.2.1 is
    available: 24.0.0-alpha1 and A newer version of
    com.android.support:appcompat-v7 than 23.2.1 is available:
    24.0.0-alpha1</p>
  </blockquote>
  
  <p>my build.gradle file:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion "23.0.2"
  
      defaultConfig {
          applicationId "com.zkc.i2ctools"
          minSdkVersion 8
          targetSdkVersion 23
      }
  
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
  }
  
  dependencies {
      compile 'com.android.support:support-v4:23.2.1'
      compile 'com.android.support:appcompat-v7:23.2.1'
      compile files('libs/core-3.1.0.jar')
  }
  </code></pre>
  
  <p>Gradle build with error .What is wrong?</p>