再app的build.gradle中

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.3"
    defaultConfig {
        applicationId "com.orbbec.obcolor"
        minSdkVersion 15
        targetSdkVersion 22
        versionCode 2
        versionName "2.0.1"  ---》在这里修改对应的版本号即可。
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }