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

　　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。