Android <21에서 Retrofit 2를 사용하여 HTTPS에 연결하지 못했습니다.

그래서 https://api.*****.id내 Android를 통해 TLS v1.2 (Let 's Encrypt)를 사용하는 API를 연결하려고했습니다 .

Android> 20을 사용하는 경우 모든 것이 정상적으로 작동하지만 Android <21을 사용하는 경우 Android 모니터에 다음과 같이 표시됩니다.

W/dalvikvm: VFY: unable to find class referenced in signature (Ljava/nio/file/Path;)
W/dalvikvm: VFY: unable to find class referenced in signature ([Ljava/nio/file/OpenOption;)
I/dalvikvm: Could not find method java.nio.file.Files.newOutputStream, referenced from method okio.Okio.sink
W/dalvikvm: VFY: unable to resolve static method 23633: Ljava/nio/file/Files;.newOutputStream (Ljava/nio/file/Path;[Ljava/nio/file/OpenOption;)Ljava/io/OutputStream;
D/dalvikvm: VFY: replacing opcode 0x71 at 0x000a
W/dalvikvm: VFY: unable to find class referenced in signature (Ljava/nio/file/Path;)
W/dalvikvm: VFY: unable to find class referenced in signature ([Ljava/nio/file/OpenOption;)
I/dalvikvm: Could not find method java.nio.file.Files.newInputStream, referenced from method okio.Okio.source
W/dalvikvm: VFY: unable to resolve static method 23632: Ljava/nio/file/Files;.newInputStream (Ljava/nio/file/Path;[Ljava/nio/file/OpenOption;)Ljava/io/InputStream;
D/dalvikvm: VFY: replacing opcode 0x71 at 0x000a
D/Error: java.net.ConnectException: Failed to connect to api.*****.id/64:ff9b::8b3b:eb77:443

여기에서 TLSSocketFactory를 구현했습니다. https://gist.github.com/fkrauthan/ac8624466a4dee4fd02f

그런 다음 다음과 같이 사용했습니다.

httpClient = new OkHttpClient.Builder();

ConnectionSpec spec = new ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
                .tlsVersions(TlsVersion.TLS_1_2, TlsVersion.TLS_1_1)
                .build();

if (Build.VERSION.SDK_INT < 21) {
     X509TrustManager trustManager = TLSPatch.systemDefaultTrustManager();
     httpClient.sslSocketFactory(new TLSPatch.TLSSocketFactory(), trustManager);
}

httpClient.connectionSpecs(Collections.singletonList(spec))
     .readTimeout(60, TimeUnit.SECONDS);

누구든지 이와 같은 문제가 있습니까?