问题1：Android error “Could not get BatchedBridge, make sure your bundle is packaged properly” on start of app
react-native run-android
react-native start --reset-cache
问题2：How to resolve “EADDRINUSE: address already in use” error（8081端口被占用了）
Error: listen EADDRINUSE: address already in use :::8081 at Server.setupListenHandle [as _listen2] (net.js:1258:14) at listenInCluster (net.js:1306:12) at Server.listen (net.js:1394:7)
解决办法：
lsof -i TCP:8081 | grep LISTEN
会出现如下类似提示：
node 2464 murari 21u IPv6 4392639 0t0 TCP *:http-alt
然后执行：
kill -9 2464
ok。到此就解决了。
原文：https://www.cnblogs.com/xjf125/p/12267327.html