一、红屏

unable to load script from assets ‘index.android bundle’ ,make sure your bundle is packaged correctly or youu’re runing a packager server
解决方法：
1、在 android/app/src/main 目录下创建一个 assets空文件夹
2、通过命令行执行 react-native bundle –platform android –dev false –entry-file index.js –bundle-output android/app/src/main/assets/index.android.bundle –assets-dest android/app/src/main/res/
3、重新react-native run-android
4、问题解决。