Android error “Could not get BatchedBridge, make sure your bundle is packaged properly” on start of app

　　問題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

　問題2：How to resolve “EADDRINUSE: address already in use” error（8081埠被占用了）　　

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)

　解決辦法：

lsof -i TCP:8081 | grep LISTEN

　會出現如下類似提示：

node    2464 murari   21u  IPv6 4392639      0t0  TCP *:http-alt

　然後執行：

kill -9 2464

　　ok。到此就解決了。