Cannot add task 'wrapper' as a t

task wrapper(type: Wrapper) {
gradleVersion = '4.4'
distributionUrl = distributionUrl.replace("bin", "all")
}

改成如下

wrapper {
gradleVersion = '4.4'
distributionUrl = distributionUrl.replace("bin", "all")
}

这是由于使用gradle版本5.x导致的

参考：https://stackoverflow.com/questions/53709282/cannot-add-task-wrapper-as-a-task-with-that-name-already-exists