app directly crashing rather than displaying red alert

Question

Currently I have implemented reactnative to existing native app but its directly crashing when i start it from android studio. windows doesnt turns red as usual.

 Process: com.., PID: 15608
    java.lang.RuntimeException: Unable to load script. Make sure you're either running a Metro server (run 'react-native start') or that your bundle 'index.android.bundle' is packaged correctly for release.
        at com.facebook.react.bridge.CatalystInstanceImpl.jniLoadScriptFromAssets(Native Method)

try running "react-native run-android" in you project main directory (one level above android folder) — DNA.h, Apr 25 '19 at 17:25
error Android project not found. Are you sure this is a React Native project? — xubilulive, Apr 25 '19 at 17:26
this is not react native project, its native project so thereis app/android...., iam runing it from studio and crashed directly on the log no red screen errors — xubilulive, Apr 25 '19 at 17:29
@xubilulive It is indeed a react native project running it from android studio doesnt mean that it is a native project — HarshitMadhav, Apr 25 '19 at 17:54

HarshitMadhav · Answer 1 · 2019-04-25T18:10:07.070

The problem that you are facing is that a react native project creates a bundle to load the script for the app which you have not created it so your android app is loading nothing when running the react-native run-android command.

Do this in your project root directory:

1- Run this command mkdir android\app\src\main\assets

2- After this command, run this command 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

Step 2 command execution might take time (have patience)

3- then run react-native run-android command

More info at here and here

app directly crashing rather than displaying red alert

1 Answers1