title: Error in compile SDK version?
body: <p>Can anyone please tell me how do i fix this error:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 21
      buildToolsVersion '21.1.2'
      defaultConfig {
          applicationId "com.example.abhishek.detector"
          minSdkVersion 10
          targetSdkVersion 21
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
      productFlavors {
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:23.1.0'
      compile 'com.android.support:design:23.1.0'
      compile 'com.google.android.gms:play-services-location:8.1.0'
  }
  </code></pre>
  
  <p>Error:
  Error:Execution failed for task ':app:processDebugResources'.</p>
  
  <blockquote>
    <p>com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Users\hp-pc\AppData\Local\Android\sdk\build-tools\21.1.2\aapt.exe'' finished with non-zero exit value 1</p>
  </blockquote>