// set to PaymentActivity.ENVIRONMENT_PRODUCTION to move real money.
// set to PaymentActivity.ENVIRONMENT_SANDBOX to use your test credentials
// from https://developer.paypal.com
// set to PaymentActivity.ENVIRONMENT_NO_NETWORK to kick the tires without
// communicating to PayPal's servers.
https://github.com/paypal/PayPal-Android-SDK#testing
我想了解sdk中LIVE和PRODUCTION模式之间的区别我找不到LIVE模式的文档。