title: Error:Failed to find target with hash string 'android-24' in:
body: <p>are you good.
  I was inexperienced, very much like android, but encountered difficulties when creating the project .
  I used to compile tools are android studio 2.2 Preview5.
  After creating the project, find errors.</p>
  
  <pre><code>Error:Failed to find target with hash string 'android-24' in: E:\android-sdk-windows
  &lt;a href="install.android.platform"&gt;Install missing platform(s) and sync                project&lt;/a&gt;
  </code></pre>
  
  <h2>buid.gradle</h2>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 24
      buildToolsVersion "22.0.0"
      defaultConfig {
          applicationId "www.jike.com.myapplication"
          minSdkVersion 15
          targetSdkVersion 24
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      androidTestCompile('com.android.support.test.espresso:espresso-core:2.0', {
          exclude group: 'com.android.support', module: 'support-annotations'
      })
      compile 'com.android.support:appcompat-v7:24.+'
      compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha4'
      testCompile 'junit:junit:4.12'
  }
  </code></pre>
  
  <p>Because it is self-learning , so no one can consult。
   In stackoverflow, I found a similar problem,But I don't know much about。</p>
  
  <p>I am a novice don't understand,Hope friends detailed explanation,  thank you very much.</p>
  
  <p>My English is not good , the above words are translated using the software , the term is not accurate enough , please forgive me.</p>
  
  <p>I hope to get help. Thanks again.</p>