这行if (coon.getResponseCode() == 200)

E/AndroidRuntime: FATAL EXCEPTION: Thread-4

                  Process: com.example.administrator.myapplication, PID: 3963

                  java.lang.SecurityException: Permission denied (missing INTERNET permission?)

                      at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:119)

                      at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:74)

                      at java.net.InetAddress.getAllByName(InetAddress.java:752)

                      at com.android.okhttp.internal.Network$1.resolveInetAddresses(Network.java:29)

                      at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:187)

                      at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:156)

                      at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:98)

                      at com.android.okhttp.internal.http.HttpEngine.createNextConnection(HttpEngine.java:345)

                      at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:328)

                      at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:246)

                      at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:457)

                      at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:405)

                      at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:521)

                      at com.example.administrator.myapplication.DetailActivity$1.run(DetailActivity.java:38)