Multipart上传的进度条,包含多个Android文件

概述编辑：已解决,向下滚动;) 按照教程here, 我在AsyncTask中实现了一个进度条对话框,以显示上传数据的百分比.目前它只是显示从0％到100％,然后它被卡在100％,直到所有数据上传.我正在尝试上传一个Json字符串加上4个图像. 码： private class UploaderTask extends AsyncTask<JSONArray, Integer, String> { 编辑：已解决,向下滚动;)

按照教程here,

我在AsyncTask中实现了一个进度条对话框,以显示上传数据的百分比.目前它只是显示从0％到100％,然后它被卡在100％,直到所有数据上传.我正在尝试上传一个Json字符串加上4个图像.

码：

private class UploaderTask extends AsyncTask<JsONArray,Integer,String> {    private ProgressDialog dialog;    protected Context mContext;    long totalSize;    public UploaderTask(Context context) {        mContext = context;    }    @OverrIDe    protected voID onPreExecute() {        dialog = new ProgressDialog(mContext);        dialog.setProgressstyle(ProgressDialog.STYLE_HORIZONTAL);        dialog.setTitle("Uploading data");        dialog.setCancelable(false);        //dialog.setIndeterminate(true);        dialog.setMessage("Please wait...");        dialog.show();        //dialog.setProgress(0);    }    @OverrIDe    public String doInBackground(JsONArray... Json) {        String responseMessage = "";        int counter = 0;        try {            Custommultipartentity entity = new Custommultipartentity(new ProgressListener() {                @OverrIDe                public voID transferred(long num) {                    publishProgress((int) ((num / (float) totalSize) * 100));                }            });            httpClIEnt httpclIEnt = new DefaulthttpClIEnt();            httpPost httppost = new httpPost(URL);            //convert JsON array to String (first element contains the whole of data)            String Json_encoded_string = Json[0].toString();            //add Json data            entity.addPart("Json",new StringBody(Json_encoded_string));            //get all images plus data and add them to the Multipart Entity            for (images_cursor.movetoFirst(); !images_cursor.isAfterLast(); images_cursor.movetoNext()) {                counter++;                //Get image and convert to byte array                byte[] image_ba = images_cursor.getBlob(images_cursor.getColumnIndex("image"));                long image_unit_ID = images_cursor.getLong(images_cursor.getColumnIndex("unit_ID"));                String image_caption = images_cursor.getString(images_cursor.getColumnIndex("caption"));                //add image to multipart                entity.addPart("image" + counter,new ByteArrayBody(image_ba,"image" + counter + ".jpg"));                //add unit _ID to multipart                entity.addPart("image_unit_ID" + counter,new StringBody(String.valueOf(image_unit_ID)));                //add caption to multipart                entity.addPart("image_caption" + counter,new StringBody(String.valueOf(image_caption)));            }                            totalSize = entity.getContentLength();            httppost.setEntity(entity);            httpResponse response = httpclIEnt.execute(httppost);            inputStream inputStream = response.getEntity().getContent();            responseMessage = inputStreamToString(inputStream);            //log out response from server            longInfo(responseMessage);        }        //show error if connection not working        catch (SocketTimeoutException e) {            e.printstacktrace();            responseMessage = "unreachable";        }        catch (ConnectTimeoutException e) {            e.printstacktrace();            responseMessage = "unreachable";        }        catch (Exception e) {            e.printstacktrace();            responseMessage = "unreachable";        }        return responseMessage;    }    @OverrIDe    protected voID onProgressUpdate(Integer... progress) {        dialog.setProgress((int) (progress[0]));    }    @OverrIDe    protected voID onPostExecute(String result) {        //result is the response back from "doInBackground"        dialog.cancel();        TextVIEw response_holder = (TextVIEw) findVIEwByID(R.ID.response);        //check if there were errors upoloading        if (result.equalsIgnoreCase("unreachable")) {            response_holder.setText("Error while uploading...Please check your internet connection and retry.");            return;        }        if (result.equalsIgnoreCase("error saving project data")) {            response_holder.setText("There was an error on the server saving the project data,please retry.");            return;        }        if (result.equalsIgnoreCase("error saving sites data")) {            response_holder.setText("There was an error on the server saving the sites data,please retry.");            return;        }        if (result.equalsIgnoreCase("project saved")) {            response_holder.setText("Data uploaded successfully!");            return;        }        if (result.equalsIgnoreCase("project already exist")) {            response_holder.setText("This project already exist!");            return;        }    } }

我猜它只是计算Json字符串的总大小,因为它是第一部分…任何建议？

编辑：可能重复,仍然没有解决方案here

编辑：已解决添加totalSize = entity.getContentLength();在发布实体之前,代码已更新

解决方法 看看这段代码：

@OverrIDeprotected voID onProgressUpdate(Integer... progress) {    dialog.setProgress((int) (progress[0]));}

从本质上讲,您只关心第一个进步值.这很好,因为你的代码中可能只有一个.但是您可以通过向代码中添加publishProgress语句来发布进度.这可以通过每次完成某事时按百分比来完成,如下所示：

int progress_done=20;     publishProgress(progress_done);     for (images_cursor.movetoFirst(); !images_cursor.isAfterLast(); images_cursor.movetoNext()) {            counter++;            //Get image and convert to byte array            byte[] image_ba = images_cursor.getBlob(images_cursor.getColumnIndex("image"));            long image_unit_ID = images_cursor.getLong(images_cursor.getColumnIndex("unit_ID"));            String image_caption = images_cursor.getString(images_cursor.getColumnIndex("caption"));            //add image to multipart            entity.addPart("image" + counter,"image" + counter + ".jpg"));            //add unit _ID to multipart            entity.addPart("image_unit_ID" + counter,new StringBody(String.valueOf(image_unit_ID)));            //add caption to multipart            entity.addPart("image_caption" + counter,new StringBody(String.valueOf(image_caption)));            progress_done+=20;            publishProgress(progress_done);        }

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