In Activity class:

    private fun initPermission() {
         val permissions = arrayOf(Manifest.permission.INTERNET, 
         Manifest.permission.ACCESS_NETWORK_STATE, 
         Manifest.permission.MODIFY_AUDIO_SETTINGS, 
         Manifest.permission.WRITE_EXTERNAL_STORAGE, 
         Manifest.permission.WRITE_SETTINGS, 
         Manifest.permission.READ_PHONE_STATE, 
         Manifest.permission.ACCESS_WIFI_STATE, 
         Manifest.permission.CHANGE_WIFI_STATE)

        val toApplyList = ArrayList<String>()

        for (perm in permissions) {
            if (PackageManager.PERMISSION_GRANTED != ContextCompat.checkSelfPermission(this, perm)) {
                toApplyList.add(perm)
                //进入到这里代表没有权限.
            }
        }
        
        val tmpList = arrayOfNulls<String>(toApplyList.size)
        if (!toApplyList.isEmpty()) {
            ActivityCompat.requestPermissions(this, toApplyList.toArray(tmpList), 123)// three times to ask
        }

    }


    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
        // 此处为android 6.0以上动态授权的回调
    }

In onCreate:

  initPermission()