React Native fetch() not working android

Question

I am trying to call fetch() function.

It works fine on iOS but not working on Android.

fetch('https://admin.leanpoint.com/Api/User/[email protected]', { 
  method: 'POST', 
  headers: {
    'Authorization': 'Basic c3JpbnVAbWFpbnBvaW50LmRrOnNhaWJhYmE='
  },
})
.then((res) => {
  res.json().then((json) => {
    alert(JSON.stringify(json))
  })
})
.catch((err) => {
  alert(JSON.stringify(err))
})

On iOS, it enters .then() but on Android it enters .catch() and err is {}.

It is not working on Emulator and real device as well.

Any help is appreciated. ^_^

Error log using Axios

When I used fetch() it enters .catch() with {}.

I tried with Axios as below.

axios.post('https://admin.leanpoint.com/Api/User/[email protected]', null, {
      headers: {
        'Authorization': 'Basic c3JpbnVAbWFpbnBvaW50LmRrOnNhaWJhYmE='
      },
      timeout: 2000
    })
    .then((res) => {
      console.log(res.data)
    })
    .catch((err) => {
      console.log(err)
    })

And it returns error like below.

{ [Error: Network Error]
  config:
   { adapter: [Function: xhrAdapter],
     transformRequest: { '0': [Function: transformRequest] },
     transformResponse: { '0': [Function: transformResponse] },
     timeout: 2000,
     xsrfCookieName: 'XSRF-TOKEN',
     xsrfHeaderName: 'X-XSRF-TOKEN',
     maxContentLength: -1,
     validateStatus: [Function: validateStatus],
     headers:
      { Accept: 'application/json, text/plain, */*',
        'Content-Type': 'application/x-www-form-urlencoded',
        Authorization: 'Basic c3JpbnVAbWFpbnBvaW50LmRrOnNhaWJhYmE=' },
     method: 'post',
     url: 'https://admin.leanpoint.com/Api/User/[email protected]',
     data: null },
  request:
   { UNSENT: 0,
     OPENED: 1,
     HEADERS_RECEIVED: 2,
     LOADING: 3,
     DONE: 4,
     readyState: 4,
     status: 0,
     timeout: 2000,
     withCredentials: true,
     upload: {},
     _aborted: false,
     _hasError: true,
     _method: 'POST',
     _response: 'java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.',
     _url: 'https://admin.leanpoint.com/Api/User/[email protected]',
     _timedOut: false,
     _trackingName: 'unknown',
     _incrementalEvents: false,
     responseHeaders: undefined,
     _requestId: null,
     _cachedResponse: undefined,
     _headers:
      { accept: 'application/json, text/plain, */*',
        'content-type': 'application/x-www-form-urlencoded',
        authorization: 'Basic c3JpbnVAbWFpbnBvaW50LmRrOnNhaWJhYmE=' },
     _responseType: '',
     _sent: true,
     _lowerCaseResponseHeaders: {},
     _subscriptions: [] },
  response: undefined }

Answer 1

this works for me

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">



<application android:usesCleartextTraffic="true" tools:targetApi="28" />