fetch network request failed android

[totofe]

I try to call a https webservice using fetch. The webservice uses a certificate to be able to connect.
I had the same problem with IOS. I solved the problem by adding in the file RCTHTTPRequestHandler.m this code :

- (void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler
{
  completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
}

On Android, I have this message:

09-03 15:56:13.013 4811-5139/com.mweb_dmc D/SettingsInterface:  from settings cache , name = sound_effects_enabled , value = 0
09-03 15:56:13.015 4811-5319/com.mweb_dmc D/libc-netbsd: [getaddrinfo]: hostname=xxx.xxx.xx.xxx; servname=(null); netid=0; mark=0
    [getaddrinfo]: ai_addrlen=0; ai_canonname=(null); ai_flags=4; ai_family=0
09-03 15:56:13.015 4811-5319/com.mweb_dmc I/System.out: [CDS][DNS] getAllByNameImpl netId = 0
09-03 15:56:13.016 4811-5319/com.mweb_dmc D/libc-netbsd: [getaddrinfo]: hostname=xxx.xxx.xx.xxx; servname=(null); netid=0; mark=0
    [getaddrinfo]: ai_addrlen=0; ai_canonname=(null); ai_flags=4; ai_family=0
09-03 15:56:13.016 4811-5319/com.mweb_dmc I/System.out: [CDS]rx timeout:0
09-03 15:56:13.017 4811-5319/com.mweb_dmc I/System.out: [socket][20] connection /xxx.xxx.xx.xxx:1443;LocalPort=43588(0)
    [CDS]connect[/xxx.xxx.xx.xxx:1443]
09-03 15:56:13.017 4811-5319/com.mweb_dmc D/Posix: [Posix_connect Debug]Process com.mweb_dmc :1443 
09-03 15:56:13.113 4811-5319/com.mweb_dmc I/System.out: [CDS]port[43588]
    [socket][/192.168.1.91:43588] connected
09-03 15:56:13.114 4811-5319/com.mweb_dmc D/libc-netbsd: [getaddrinfo]: hostname=xxx.xxx.xx.xxx; servname=(null); netid=0; mark=0
    [getaddrinfo]: ai_addrlen=0; ai_canonname=(null); ai_flags=4; ai_family=0
09-03 15:56:13.115 4811-5319/com.mweb_dmc D/NativeCrypto: ssl=0xaf53cd00 NativeCrypto_SSL_do_handshake fd=0x96f1cd20 shc=0x96f1cd24 timeout_millis=0 client_mode=1 npn=0x0
    doing handshake ++
    ssl=0xaf53cd00 info_callback where=0x10 ret=1
    ssl=0xaf53cd00 handshake start in CINIT  before connect initialization
    ssl=0xaf53cd00 info_callback calling handshakeCompleted
    ssl=0xaf53cd00 info_callback completed
    ssl=0xaf53cd00 info_callback where=0x1001 ret=1
    ssl=0xaf53cd00 SSL_connect:CINIT  before connect initialization
    ssl=0xaf53cd00 info_callback ignored
    ssl=0xaf53cd00 info_callback where=0x1001 ret=1
    ssl=0xaf53cd00 SSL_connect:3WCH_A SSLv3 write client hello A
    ssl=0xaf53cd00 info_callback ignored
    ssl=0xaf53cd00 info_callback where=0x1002 ret=-1
    ssl=0xaf53cd00 SSL_connect:error exit in 3RSH_A SSLv3 read server hello A
    ssl=0xaf53cd00 info_callback ignored
    doing handshake -- ret=-1
    ssl=0xaf53cd00 NativeCrypto_SSL_do_handshake ret=-1 errno=11 sslError=2 timeout_millis=0
09-03 15:56:13.194 4811-5319/com.mweb_dmc D/NativeCrypto: doing handshake ++
    ssl=0xaf53cd00 info_callback where=0x1001 ret=1
    ssl=0xaf53cd00 SSL_connect:3RSH_A SSLv3 read server hello A
    ssl=0xaf53cd00 info_callback ignored
09-03 15:56:13.194 4811-5319/com.mweb_dmc E/NativeCrypto: ssl=0xaf53cd00 cert_verify_callback x509_store_ctx=0x96f1cb4c arg=0x0
    ssl=0xaf53cd00 cert_verify_callback calling verifyCertificateChain authMethod=ECDHE_RSA
09-03 15:56:13.196 4811-5319/com.mweb_dmc D/NativeCrypto: ssl=0xaf53cd00 cert_verify_callback => 0
09-03 15:56:13.196 4811-5319/com.mweb_dmc D/OpenSSLLib: OpensslErr:Module:16(190:126); file:external/boringssl/src/ssl/s3_clnt.c ;Line:984;Function:ssl3_get_server_certificate
09-03 15:56:13.196 4811-5319/com.mweb_dmc D/NativeCrypto: ssl=0xaf53cd00 info_callback where=0x4008 ret=558
    ssl=0xaf53cd00 SSL3 alert write:F:CU fatal certificate unknown
    ssl=0xaf53cd00 info_callback ignored
    ssl=0xaf53cd00 info_callback where=0x1002 ret=-1
    ssl=0xaf53cd00 SSL_connect:error exit in 3RSC_B SSLv3 read server certificate B
    ssl=0xaf53cd00 info_callback ignored
    doing handshake -- ret=-1
    ssl=0xaf53cd00 NativeCrypto_SSL_do_handshake exception => 0
09-03 15:56:13.197 4811-5319/com.mweb_dmc I/System.out: close [socket][/192.168.1.91:43588]
    close [socket][/:::43588]
09-03 15:56:13.304 4811-5138/com.mweb_dmc I/ReactNativeJS: { [Error: Error Connection]
      line: 119541,
      column: 24,
      sourceURL: 'http://localhost:8081/index.delta?platform=android&dev=true&minify=false' }

how can I solve this problem for android?

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