错误原因1：将原本是JPG的图片强制改成PNG扩展名。
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/
错误原因2: DrawerNavigator.js本身的错误
https://github.com/aksonov/react-native-router-flux/issues/3124
sed -i -e 's/TabRouter/tabRouter/g' node_modules/react-navigation/src/navigators/DrawerNavigator.js
sed -i -e 's/\/routers\/tabRouter/\/routers\/TabRouter/g' node_modules/react-navigation/src/navigators/DrawerNavigator.js