javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed Flutter

Question

I am learning flutter. Flutter default app is working fine on the web, but showing following error on the Android emulator. I checked solutions on the internet, but did not work out for me.

I tried following solutions.

Solution 1 : Switch to smartphone network

Solution 2 : Replace https to http from distribution Url in gradle-wrapper properties. distributionUrl=http\://services.gradle.org/distributions/gradle-7.4-all.zip

Solution 3 : Download ssl certificate from http://jcenter.bintray.com/ and add to truststore.

Solution 4 : Add following lines of code in gradle.properties

systemProp.javax.net.ssl.trustStore=[PATH_TO_TRUST_STORE]
systemProp.javax.net.ssl.trustStorePassword=[PASSWORD] (changeit)

Exception in thread "main" javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:131)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:349)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:292)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:287)
    at java.base/sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(CertificateMessage.java:1357)
    at java.base/sun.security.ssl.CertificateMessage$T13CertificateConsumer.onConsumeCertificate(CertificateMessage.java:1232)
    at java.base/sun.security.ssl.CertificateMessage$T13CertificateConsumer.consume(CertificateMessage.java:1175)
    at java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:392)
    at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:443)
    at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:421)
    at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:182)
    at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:172)
    at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1426)
    at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1336)
    at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:450)
    at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:421)
    at java.base/sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:572)
    at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:197)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.followRedirect0(HttpURLConnection.java:2787)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2699)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1854)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1520)
    at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:250)
    at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
    at org.gradle.wrapper.Download.download(Download.java:44)
    at org.gradle.wrapper.Install$1.call(Install.java:61)
    at org.gradle.wrapper.Install$1.call(Install.java:48)
    at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
    at org.gradle.wrapper.Install.createDist(Install.java:48)
    at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
    at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)

I created plain android project (without flutter) and it is running on Android Emulator. I am using Windows10. Android Emulator - Pixel XL API 30

Answer 1

I solved my problem by updating Gradle to its latest version.(7.1.2 -> 7.1.3)

To update Gradle, edit following line in /{app}/android/build.gradle and change the version.

    dependencies {
        classpath 'com.android.tools.build:gradle:7.1.3'
    }