In <declare-styleable> Fon

android {
    compileSdkVersion 27 //修改此处
    buildToolsVersion "27.0.3"//修改此处

    defaultConfig {
        applicationId "com.tms_driver"
        minSdkVersion 16
        targetSdkVersion 27 //修改此处
        versionCode 1
        versionName "1.0.0"
        ndk {
            abiFilters "armeabi-v7a", "x86"
        }
        vectorDrawables.useSupportLibrary = true
        multiDexEnabled = true  //地图显示"方法过多"而增加此句
    }
...