Fix CertPathValidatorException: Trust anchor for certification path not found.

app/src/main/java/org/houxg/leamonax/network/ApiProvider.java

@@ -11,6 +11,14 @@ import org.houxg.leamonax.network.api.NotebookApi;
 import org.houxg.leamonax.network.api.UserApi;
 
 import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSession;
+import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
 
 import okhttp3.HttpUrl;
 import okhttp3.Interceptor;
@@ -70,6 +78,37 @@ public class ApiProvider {
             builder.addNetworkInterceptor(interceptor);
             builder.addNetworkInterceptor(new StethoInterceptor());
         }
+        final TrustManager[] trustAllCerts = new TrustManager[]{
+                new X509TrustManager() {
+                    @Override
+                    public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) {
+                    }
+
+                    @Override
+                    public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) {
+                    }
+
+                    @Override
+                    public java.security.cert.X509Certificate[] getAcceptedIssuers() {
+                        return new java.security.cert.X509Certificate[]{};
+                    }
+                }
+        };
+        try {
+            final SSLContext sslContext = SSLContext.getInstance("SSL");
+            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());
+            final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
+            builder.sslSocketFactory(sslSocketFactory, (X509TrustManager) trustAllCerts[0]);
+            builder.hostnameVerifier(new HostnameVerifier() {
+                @Override
+                public boolean verify(String hostname, SSLSession session) {
+                    return true;
+                }
+            });
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        builder.connectTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS);
         OkHttpClient client = builder.build();
         mApiRetrofit = new Retrofit.Builder()
                 .baseUrl(host + "/api/")