Android: using Dropbox API to know if there are changes in my Dropbox

问题

I'm trying to know if there are changes in my Dropbox. Basically this is my strategy (I'm using https://www.dropbox.com/developers-v1/core ):

calling delta/last_cursor to get a cursor

calling long_poll_data with this cursor as parameter

           /// I use RESTUtility and i've tried to adapt this code : http://www.programcreek.com/java-api-examples/index.php?api=com.dropbox.client2.RESTUtility
           /// example  : 8 for last_cursor
           /// example : 13 for longpoll_delta

           /// https://www.dropbox.com/developers-v1/core/docs#delta
           // we use first the method : /delta/latest_cursor to get a cursor

           Log.d(" NotificationService", " ================================Finding latest cursor");
           ArrayList<String> params = new ArrayList<>();
           params.add("include_media_info");
           params.add("false"); // if true there is a mistake
           Object response = RESTUtility.request(RESTUtility.RequestMethod.POST, "api.dropbox.com", "delta/latest_cursor", 1, params.toArray(new String[params.size()]), mDBApi.getSession());

           /// Preparation of the cursor to use longpoll_ delta

           // response.toString() look like that : {"cursor":"AAGwyo3TijR4_dgBxCj8LrU-NBO5ET7xipVxMl_vGMn-O7PKemycTBR3FpK57856J-vTtn5wyNyzwJaaGlKn2h2o5gv8lBFzQ6Hn9KgdDHi7uH77boLG2Y1GOT1VgnWyxMU"}
           Log.d(" NotificationService", " ================================First cursor avant le substring : " + response.toString());
           // lastestCursor look lije that : AAGwyo3TijR4_dgBxCj8LrU-NBO5ET7xipVxMl_vGMn-O7PKemycTBR3FpK57856J-vTtn5wyNyzwJaaGlKn2h2o5gv8lBFzQ6Hn9KgdDHi7uH77boLG2Y1GOT1VgnWyxMU
           latestCursor = response.toString().substring(11, response.toString().length() - 2);
           Log.d(" NotificationService", " ================================First cursor: " + latestCursor);

           //Try to use longpoll_delta to know if {"changes": false, "backoff": 60} changes is true

           ArrayList<String> paramsLongpoll_delta = new ArrayList<>();
           paramsLongpoll_delta.add("cursor");
           paramsLongpoll_delta.add(latestCursor);
           paramsLongpoll_delta.add("timeout");
           paramsLongpoll_delta.add("120");

           Object responseLongpoll_delta = RESTUtility.request(RESTUtility.RequestMethod.GET, "api-notify.dropbox.com", "longpoll_delta", 1, paramsLongpoll_delta.toArray(new String[paramsLongpoll_delta.size()]), mDBApi.getSession());
           Log.d(" NotificationService", " ================================Second Cursor: " + responseLongpoll_delta.toString());

        } catch (DropboxException e1) {
            e1.printStackTrace();
        }
    }
});
interrogateTheServerTask.start();

The point is: I get the response for the first call. But for the second I get this answer:

08-30 17:11:57.706 31971-32681/com.example.colombop.ble W/System.err: com.dropbox.client2.exception.DropboxIOException: java.net.SocketTimeoutException: Read timed out
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at com.dropbox.client2.RESTUtility.execute(Unknown Source)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at com.dropbox.client2.RESTUtility.execute(Unknown Source)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at com.dropbox.client2.RESTUtility.streamRequest(Unknown Source)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at com.dropbox.client2.RESTUtility.request(Unknown Source)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at com.example.colombop.ble.NotificationService$2.run(NotificationService.java:161)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at java.lang.Thread.run(Thread.java:818)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err: Caused by: java.net.SocketTimeoutException: Read timed out
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at com.android.org.conscrypt.NativeCrypto.SSL_read(Native Method)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.read(OpenSSLSocketImpl.java:705)
08-30 17:11:57.707 31971-32681/com.example.colombop.ble W/System.err:     at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:108)
08-30 17:11:57.708 31971-32681/com.example.colombop.ble W/System.err:     at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:196)
08-30 17:11:57.708 31971-32681/com.example.colombop.ble W/System.err:     at org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:88)
08-30 17:11:57.708 31971-32681/com.example.colombop.ble W/System.err:     at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:179)
08-30 17:11:57.708 31971-32681/com.example.colombop.ble W/System.err:     at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:185)
08-30 17:11:57.708 31971-32681/com.example.colombop.ble W/System.err:     at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:240)
08-30 17:11:57.708 31971-32681/com.example.colombop.ble W/System.err:     at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:264)

Does anybody has a suggestion?

来源：https://stackoverflow.com/questions/39231698/android-using-dropbox-api-to-know-if-there-are-changes-in-my-dropbox

标签

java

android

notifications

dropbox-api