compileSdkVersion，buildToolsVersion还有targetSdkVersion要一致，从而避免build的时候报错

 1 android {
 2  compileSdkVersion 24  3  buildToolsVersion "24.0.0"  4 
 5     defaultConfig {
 6         applicationId "com.wingsofts.rxretrofitmvpdagger2databinding"
 7         minSdkVersion 15
 8  targetSdkVersion 24  9         versionCode 1
10         versionName "1.0"
11     }
12     buildTypes {
13         release {
14             minifyEnabled false
15             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
16         }
17     }
18     dataBinding {
19         enabled = true
20     }
21 }