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我有多个图像上传到 php 服务器的问题。下面给出的代码适用于 android 2.x 版本，但相同的代码不适用于 android 4.x 及更高版本。我搜索了一下，发现数据发布必须由 AsyncTask 异步完成。但我不知道如何通过phonegap（调用异步任务）来完成。

在这里我有我的代码：

package com.mymedlinks.hybrid;

import java.util.TimeZone;

import org.apache.cordova.api.Plugin;
import org.apache.cordova.api.PluginResult;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.ContextWrapper;
import android.provider.Settings;
import android.util.Log;

public class SamplePlugin extends Plugin{
    public String ACTION_POST_DATA="post_data";

    @Override
    public PluginResult execute(String arg0, JSONArray arg1, String arg2) {
        // TODO Auto-generated method stub
        PluginResult pluginRes;
        if(ACTION_POST_DATA.equals(arg0)){
            try {
                pluginResult = imgsUpload(args.getString(0),
                        args.getString(1), args.getString(2));
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } else{
            pluginRes = new PluginResult(PluginResult.Status.INVALID_ACTION);;
        }
        return pluginRes;
    }

    private PluginResult imgsUpload(String date,String time,
             String fileNames) {
             PluginResult pluginResult=null;
        HttpURLConnection conn = null;
        DataOutputStream dos = null;
        DataInputStream inStream = null;
        ByteArrayOutputStream baos = null;
        byte[] imgData = null;
        String urlString = "https://www.mysampledata.com/upload_imgs.php";

                //opening of http connection
                try {
            URL url = new URL(urlString);
            conn = (HttpURLConnection) url.openConnection();
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("Content-Type",
                    "multipart/form-data;boundary=---------------------------1177141514664");
            String msg = "";
            StringBuffer buffr = new StringBuffer(msg);

            buffr.append("-----------------------------1177141514664");
            buffr.append(CrLf);
            buffr.append("Content-Disposition: form-data; name=\"date\";"
                    + CrLf);
            buffr.append(CrLf);
            buffr.append(date + CrLf);

            buffr.append("-----------------------------1177141514664");
            buffr.append(CrLf);
            buffr.append("Content-Disposition: form-data; name=\"time\";"
                    + CrLf);
            buffr.append(CrLf);
            buffr.append(time + CrLf);

            buffr.append("-----------------------------1177141514664");
            buffr.append(CrLf);
            buffr.append("Content-Disposition: form-data; name=\"MAX_FILE_SIZE\";"
                    + CrLf);
            buffr.append(CrLf);
            buffr.append("100000000072000" + CrLf);

            buffr.append("-----------------------------1177141514664");
            buffr.append(CrLf);
            buffr.append("Content-Disposition: form-data; name=\"method\";"
                    + CrLf);
            buffr.append(CrLf);
            buffr.append("upload.snapshots" + CrLf);

            String msg1 = "";
            StringBuffer buffr1 = new StringBuffer(msg1);
            List<byte[]> byetsInfo = new ArrayList<byte[]>();
            ArrayList<String> filenames = new ArrayList<String>();
            try {
                JSONObject jObj = new JSONObject(new String(fileNames));
                JSONArray jArray = jObj.getJSONArray("snapshot_images");
                String drPath = android.os.Environment
                        .getExternalStorageDirectory().toString();

                for (int i = 0; i < jArray.length(); i++) {
                    String img = jArray.getString(i);
                    Log.e("sample app", " imageName " + img);

                    File f = new File(drPath + "/sample_app_images/" + img);
                    Uri ur = Uri.fromFile(f);
                    filenames.add(img);
                    Bitmap bmp;
                    try {
                        bmp = Media.getBitmap(this.cordova.getActivity()
                                .getContentResolver(), ur);
                        baos = new ByteArrayOutputStream();
                        bmp.compress(CompressFormat.JPEG, 90, baos);

                        imgData = baos.toByteArray();
                        Log.e("sample app", " img data size " + imgData.length);

                    } catch (FileNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    byetsInfo.add(imgData);

                }

            } catch (JSONException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }

            String msg3 = "";
            StringBuffer buffr3 = new StringBuffer(msg3);
            buffr3.append(CrLf);
            buffr3.append("-----------------------------4664151417711--");
            buffr3.append(CrLf);

            conn.setChunkedStreamingMode(0);

            for (int i = 0; i < byetsInfo.size(); i++) {
                dos = new DataOutputStream(conn.getOutputStream());

                buffr1.delete(0, buffr1.length());
                buffr1.append("-----------------------------1177141514664");
                buffr1.append(CrLf);
                buffr1.append("Content-Disposition: form-data; name=\"snapshotUpload[]\"; filename=\""
                        + filenames.get(i) + "\"" + CrLf);
                buffr1.append("Content-Type: image/jpeg" + CrLf);
                buffr1.append(CrLf);

                dos.write(buffr.toString().getBytes());
                dos.write(buffr1.toString().getBytes());

                int index = 0;
                int size = 1024;
                do {

                    if ((index + size) < byetsInfo.get(i).length) {
                        size = byetsInfo.get(i).length - index;
                    }
                    dos.write(byetsInfo.get(i), index, size);
                    index += size;
                } while (index < byetsInfo.get(i).length);
                Log.e("file upload ", " written: " + index);

                dos.write(buffr3.toString().getBytes());

            }

            Log.e("Debug", "File is written");
            Log.e("activity upload demo ",
                    " in file upload " + conn.getResponseMessage());
            dos.flush();

        } catch (Exception ec) {
            ec.printStackTrace();
        }

           String s=null;
        // Read the response
        try {
            inStream = new DataInputStream(conn.getInputStream());
            char buff = 512;
            int len;
            byte[] data = new byte[buff];
            do {
                len = inStream.read(data);
                if (len > 0) {
                    System.out.println(new String(data, 0, len));
                    s+=new String(data, 0, len);
                    Log.e("sample app", "  "
                            + new String(data, 0, len));
                }
            } while (len > 0);
            Log.e("file upload ", " DONE ");

            dos.close();
            inStream.close();

        } catch (Exception ex) {
            ex.printStackTrace();
        }

                try {
            if(conn.getResponseMessage().equalsIgnoreCase("OK") && s!=null){
                pluginResult = new PluginResult(PluginResult.Status.OK, s);
            } else {
                pluginResult = new PluginResult(PluginResult.Status.ERROR,
                        false);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return pluginResult;

    }

}

代码中的数据是我从 js 代码中获得的文件名、日期和时间，这些数据将被发送到上述类。谁能给我一个关于如何通过Phonegap调用异步任务的示例（即，在imgsUpload（）中调用它）

非常感谢。

4

2 回答 2

0

下面是我用于将图像上传到您可以与 AsynTask 一起使用的服务器的工作代码。

//this method takes Inputs (Image name and Image file path where it stored)
//and after upload it returns json response

public String pushImage(String filepath,String imageName){


    Log.v(TAG, "path is:"+filepath);
    Log.v(TAG, "image name is:"+imageName);
    HttpURLConnection conn = null;

    DataInputStream inStream = null;

    String lineEnd = "\r\n";
    String twoHyphens = "--";
    String boundary =  "---------------------------14737809831466499882746641449";
    int bytesRead, bytesAvailable, bufferSize;
    byte[] buffer;
    int maxBufferSize = 1*1024*1024;


    String reponse_data=null;
    try{
        //------------------ CLIENT REQUEST      

        //set request properties
        // here baseURL is url for uploading image
        URL url = new URL(baseURL);        
        conn = (HttpURLConnection) url.openConnection();        
        conn.setDoInput(true);       
        conn.setDoOutput(true);       
        conn.setUseCaches(false);       
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);



        //add request body        

        DataOutputStream dos = new DataOutputStream( conn.getOutputStream() );

        dos.writeBytes(lineEnd+twoHyphens + boundary + lineEnd);        

        dos.writeBytes("Content-Disposition: form-data; name=\"uploaded\";filename=\"" + imageName + "\"" + lineEnd);     

        dos.writeBytes("Content-Type: application/octet-stream\r\n\r\n");

        //now add image data


        FileInputStream fileInputStream = new FileInputStream(new File(filepath) );

        bytesAvailable = fileInputStream.available();
        bufferSize = Math.min(bytesAvailable, maxBufferSize);
        buffer = new byte[bufferSize];
        bytesRead = fileInputStream.read(buffer, 0, bufferSize);

        while (bytesRead > 0){
            dos.write(buffer, 0, bufferSize);
            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
        }     

        dos.writeBytes(lineEnd);
        dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);


        fileInputStream.close();
        dos.flush();
        dos.close();
    }
    catch (MalformedURLException ex){
       ex.printStackTrace();
    }
    catch (IOException ioe){
        ioe.printStackTrace();
    }


    //------------------ read the SERVER RESPONSE
    try {
        if(conn !=null){
            inStream = new DataInputStream ( conn.getInputStream() );
        }

        String str=null;

        if(inStream !=null){
             while (( str = inStream.readLine()) != null){
                 Log.e("Debug","Server Response "+str);
                 reponse_data=str;
             }


             inStream.close();
        }


    }
    catch (IOException ioex){
        ioex.printStackTrace();
    }
   return reponse_data;
}

您可以从此链接下载commons - io -2.4.jar

于 2012-12-06T12:04:47.790 回答
0

我有一个解决方案，这里是 Multiple Image Upload using AsyncTask in Android using Phonegap

无论哪种方式，一旦删除以下代码行，代码似乎在所有设备上都可以正常工作

conn.setChunkedStreamingMode(0);
于 2012-12-18T11:45:52.663 回答