Android将图像上传到服务器并在mysql数据库中保存图像路径

Question

我在tutorial上按照stackoverflow这个答案，将jpg图像上传到服务器，并使用PHP将图像路径保存在数据库中。

上传功能有效，但图像路径无法添加到数据库中。有人可以帮忙吗？

下面是我的Android代码和用于上传图像的php代码的副本。

class UploadFile extends AsyncTask<String, Void, String> {

    ProgressDialog loading;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        loading = ProgressDialog.show(ViewTaskActivity.this, "Uploading photo", "Please wait...",true,true);
    }

    @Override
    protected void onPostExecute(String message) {
        super.onPostExecute(message);
        loading.dismiss();
        Toast.makeText(getApplicationContext(),message,Toast.LENGTH_LONG).show();
    }

    @Override
    protected String doInBackground(String... arg0) {
        String sourceFileUri = arg0[0];
        String fileName = sourceFileUri;

        HttpURLConnection conn = null;
        DataOutputStream dos = null;
        String lineEnd = "\r\n";
        String twoHyphens = "--";
        String boundary = "*****";
        int bytesRead, bytesAvailable, bufferSize;
        byte[] buffer;
        int maxBufferSize = 1 * 1024 * 1024;
        File sourceFile = new File(sourceFileUri);

        if (!sourceFile.isFile()) {
            loading.dismiss();
            Log.e("uploadFile", "Source File not exist :" + uploadFilePath);
            return "Source File not exist";
        }

        try {

            // open a URL connection to the Servlet
            FileInputStream fileInputStream = new FileInputStream(sourceFile);
            URL url = new URL(upLoadServerUri);

            // Open a HTTP  connection to  the URL
            conn = (HttpURLConnection) url.openConnection();
            conn.setDoInput(true); // Allow Inputs
            conn.setDoOutput(true); // Allow Outputs
            conn.setUseCaches(false); // Don't use a Cached Copy
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("ENCTYPE", "multipart/form-data");
            conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            conn.setRequestProperty("uploaded_file", fileName);

            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("journey_id", Integer.toString(journey_id)));
            params.add(new BasicNameValuePair("task_id", Integer.toString(task_id)));

            OutputStream os = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
            writer.write(getQuery(params));

            dos = new DataOutputStream(os);

            dos.writeBytes(twoHyphens + boundary + lineEnd);
            dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
                    + fileName + "\"" + lineEnd);

            dos.writeBytes(lineEnd);

            // create a buffer of  maximum size
            bytesAvailable = fileInputStream.available();

            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            buffer = new byte[bufferSize];

            // read file and write it into form...
            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);

            }

            // send multipart form data necesssary after file data...
            dos.writeBytes(lineEnd);
            dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

            // Responses from the server (code and message)
            serverResponseCode = conn.getResponseCode();
            String serverResponseMessage = conn.getResponseMessage();
            Log.d("serverResponseMessage", serverResponseMessage);

            Log.i("uploadFile", "HTTP Response is : "
                    + serverResponseMessage + ": " + serverResponseCode);

            if(serverResponseCode == 200){
                return "Photo successfully uploaded";
            }

            //close the streams //
            fileInputStream.close();
            dos.flush();
            dos.close();

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

        return "Oops! An error occurred";
    }

}

 private String getQuery(List<NameValuePair> params) throws UnsupportedEncodingException
{
    StringBuilder result = new StringBuilder();
    boolean first = true;

    for (NameValuePair pair : params)
    {
        if (first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(pair.getName(), "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(pair.getValue(), "UTF-8"));
    }

    return result.toString();
}

<?php
$file_path = "uploads/";
$journey_id = $_GET["journey_id"];
$task_id = $_GET["task_id"];

$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {

$con = mysqli_connect("localhost","db_user","somepassword","mydb");
$result = mysqli_query($con, "UPDATE journey_task_pairs SET image_name = '".$_FILES['uploaded_file']['tmp_name']."', image_path = '".$file_path."' WHERE journey_id = $journey_id && task_id = $task_id");
mysqli_close($con);
} else{
    echo "fail";
}
?>