我正在尝试从安卓设备向Rails服务器发送图片，但是当我发送时，出现了以下错误。
09-19 23:22:11.810: W/System.err(2704): org.apache.http.client.ClientProtocolException
09-19 23:22:12.000: W/System.err(2704): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:557)
09-19 23:22:12.020: W/System.err(2704): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
09-19 23:22:12.020: W/System.err(2704): at com.loopj.android.http.AsyncHttpRequest.makeRequest(AsyncHttpRequest.java:73)
09-19 23:22:12.050: W/System.err(2704): at com.loopj.android.http.AsyncHttpRequest.makeRequestWithRetries(AsyncHttpRequest.java:92)
09-19 23:22:12.050: W/System.err(2704): at com.loopj.android.http.AsyncHttpRequest.run(AsyncHttpRequest.java:54)
09-19 23:22:12.050: W/System.err(2704): at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:444)
09-19 23:22:12.050: W/System.err(2704): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
09-19 23:22:12.050: W/System.err(2704): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
09-19 23:22:12.050: W/System.err(2704): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
09-19 23:22:12.060: W/System.err(2704): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
09-19 23:22:12.070: W/System.err(2704): at java.lang.Thread.run(Thread.java:1019)
09-19 23:22:12.250: W/System.err(2704): Caused by: org.apache.http.client.NonRepeatableRequestException: Cannot retry request with a non-repeatable request entity
09-19 23:22:12.320: W/System.err(2704): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:413)
09-19 23:22:12.360: W/System.err(2704): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
09-19 23:22:12.370: W/System.err(2704): ... 10 more
奇怪的是，每次上传图片时我并不总是会收到这个错误提示，只有在执行相同的过程时偶尔会出现。以下是我的代码，我使用的是"AsyncHttpClient" (http://loopj.com/android-async-http/) 进行http连接。
public class AsynchConnector{
static AsyncHttpClient client = new AsyncHttpClient();
private static final String BASE_URL = Environment.SERVER_URL;
public static void post(String url, RequestParams params, AsyncHttpResponseHandler responseHandler){
Log.w("web", "sending POST requset to " + getAbsoluteUrl(url));
client.post(getAbsoluteUrl(url), params, responseHandler);
}
}
public static void postPicture(String serverAlbumId, String serverUserId, String filePath){
RequestParams params = new RequestParams();
params.put("user_id", CameraApp.sp.getString("server_user_id", ""));
params.put("picture[album_id]", serverAlbumId);
params.put("picture[user_id]", serverUserId);
try{
params.put("picture[image]", StorageAccessor.getPictureAsFile(filePath));
}catch(FileNotFoundException e){
Log.e("---", "no image file found ");
}
Log.i("----------", "starting to post picture");
AsynchConnector.post(PICTURE_PATH, params, new AsyncHttpResponseHandler(){
public void onSuccess(String response) {
Log.i("POST_PICTURE_RESOPNSE", response);
}
});
}