将图像从android上传到PHP服务器

Uploading Image from android to PHP server

提问by InnocentKiller

In my app i am uploading an image from my device to a local web server... after executing the code a .jpg file gets created in the server but it does not gets opened. And the size of the file in server is different from the original file.

在我的应用程序中，我将图像从我的设备上传到本地 Web 服务器......执行代码后，在服务器中创建了一个 .jpg 文件，但它没有打开。并且服务器中文件的大小与原始文件不同。

Android activity:--

安卓活动：--

public class MainActivity extends Activity {


private static int RESULT_LOAD_IMAGE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button btnSelectImage=(Button) findViewById(R.id.uploadButton);
    btnSelectImage.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

        Intent i=new   Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

        startActivityForResult(i, RESULT_LOAD_IMAGE);

        }
    });

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data!=null) {

        Uri selectedImage=data.getData();
        String[] filePathColumn={MediaStore.Images.Media.DATA};

        Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String picturePath = cursor.getString(columnIndex);
        cursor.close();


        Bitmap bitmap=BitmapFactory.decodeFile(picturePath);

        ImageView im = (ImageView) findViewById(R.id.imgBox);
        im.setImageBitmap(bitmap);

        /*
         * Convert the image to a string
         * */
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream); //compress to which format you want.
        byte [] byte_arr = stream.toByteArray();
        String image_str = Base64.encodeToString(byte_arr,Base64.DEFAULT);

        /*
         * Create a name value pair for the image string to be passed to the server
         * */
        ArrayList<NameValuePair> nameValuePairs = new  ArrayList<NameValuePair>();            
        nameValuePairs.add(new BasicNameValuePair("image",image_str));


        JSONObject jsonString=new JSONObject();
        try {
            jsonString.put("img", image_str);
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        new uploadImageToPhp().execute(jsonString);



    }


}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);


    return true;
}
public class uploadImageToPhp extends AsyncTask<JSONObject, Void, Void>
{
    String dataToSend=null;

    public static final String prefix="http://";                                                        //prefix of the urls
    public static final String server_ip="172.16.26.155";                                                   //the ip address where the php server is located    

    public static final String completeServerAddress=prefix+server_ip+"/test_upload/upload_image.php";                  //Exact location of the php files

    @Override
    protected Void doInBackground(JSONObject... params) {

        dataToSend="image="+params[0];
        communicator(completeServerAddress, dataToSend);




        return null;
    }

    public void communicator(String urlString,String dataToSend2)
    {
        String result=null;

        try
        {
            URL url=new URL(urlString);
            URLConnection conn=url.openConnection();

            HttpURLConnection httpConn=(HttpURLConnection) conn;
            httpConn.setRequestProperty("Accept", "application/json");
            httpConn.setRequestProperty("accept-charset", "UTF-8");
            httpConn.setRequestMethod("POST");         
            httpConn.connect();

            //Create an output stream to send data to the server
            OutputStreamWriter out=new OutputStreamWriter(httpConn.getOutputStream());
            out.write(dataToSend2);
            out.flush();

            int httpStatus = httpConn.getResponseCode();            
            System.out.println("Http status :"+httpStatus);

            if(httpStatus==HttpURLConnection.HTTP_OK)
            {
                Log.d("HTTP STatus", "http connection successful");

                BufferedReader in = new BufferedReader(new InputStreamReader(httpConn.getInputStream(),"UTF-8"));
                StringBuilder sb = new StringBuilder();
                String inputLine;
                while ((inputLine = in.readLine()) != null)
                {
                    System.out.println(inputLine);
                    sb.append(inputLine+"\n");
                }
                in.close();
                result=sb.toString();                       

                try
                {

                    //jsonResult = new JSONObject(result);
                }
                catch(Exception e)
                {
                     Log.e("JSON Parser", "Error parsing data " + e.toString());
                }


            }
            else
            {
                System.out.println("Somthing went wrong");
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }


}

}

PHP code:-

PHP代码：-

 $recievedJson=$_REQUEST['image'];
$imageContent=json_decode($recievedJson,true);
 $base=$imageContent["img"];

 $binary=base64_decode($base);

 echo $binary;
header('Content-Type: bitmap; charset=utf-8');
$file = fopen('uploaded_image.jpg', 'wb');
fwrite($file, $binary);
fclose($file);

回答by InnocentKiller

Use below code. It will do the same.

使用下面的代码。它会做同样的事情。

public class UploadImage extends Activity {
    InputStream inputStream;
        @Override
    public void onCreate(Bundle icicle) {
            super.onCreate(icicle);
            setContentView(R.layout.main);

            Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.icon);           ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream); //compress to which format you want.
            byte [] byte_arr = stream.toByteArray();
            String image_str = Base64.encodeBytes(byte_arr);
            ArrayList<NameValuePair> nameValuePairs = new  ArrayList<NameValuePair>();

            nameValuePairs.add(new BasicNameValuePair("image",image_str));

             Thread t = new Thread(new Runnable() {

            @Override
            public void run() {
                  try{
                         HttpClient httpclient = new DefaultHttpClient();
                         HttpPost httppost = new HttpPost("server-link/folder-name/upload_image.php");
                         httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                         HttpResponse response = httpclient.execute(httppost);
                         String the_string_response = convertResponseToString(response);
                         runOnUiThread(new Runnable() {

                                @Override
                                public void run() {
                                    Toast.makeText(UploadImage.this, "Response " + the_string_response, Toast.LENGTH_LONG).show();                          
                                }
                            });

                     }catch(Exception e){
                          runOnUiThread(new Runnable() {

                            @Override
                            public void run() {
                                Toast.makeText(UploadImage.this, "ERROR " + e.getMessage(), Toast.LENGTH_LONG).show();                              
                            }
                        });
                           System.out.println("Error in http connection "+e.toString());
                     }  
            }
        });
         t.start();
        }

        public String convertResponseToString(HttpResponse response) throws IllegalStateException, IOException{

             String res = "";
             StringBuffer buffer = new StringBuffer();
             inputStream = response.getEntity().getContent();
             int contentLength = (int) response.getEntity().getContentLength(); //getting content length…..
              runOnUiThread(new Runnable() {

            @Override
            public void run() {
                Toast.makeText(UploadImage.this, "contentLength : " + contentLength, Toast.LENGTH_LONG).show();                     
            }
        });

             if (contentLength < 0){
             }
             else{
                    byte[] data = new byte[512];
                    int len = 0;
                    try
                    {
                        while (-1 != (len = inputStream.read(data)) )
                        {
                            buffer.append(new String(data, 0, len)); //converting to string and appending  to stringbuffer…..
                        }
                    }
                    catch (IOException e)
                    {
                        e.printStackTrace();
                    }
                    try
                    {
                        inputStream.close(); // closing the stream…..
                    }
                    catch (IOException e)
                    {
                        e.printStackTrace();
                    }
                    res = buffer.toString();     // converting stringbuffer to string…..

                    runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                       Toast.makeText(UploadImage.this, "Result : " + res, Toast.LENGTH_LONG).show();
                    }
                });
                    //System.out.println("Response => " +  EntityUtils.toString(response.getEntity()));
             }
             return res;
        }
}

PHP Code

PHP代码

<?php
    $base=$_REQUEST['image'];
     $binary=base64_decode($base);
    header('Content-Type: bitmap; charset=utf-8');
    $file = fopen('uploaded_image.jpg', 'wb');
    fwrite($file, $binary);
    fclose($file);
    echo 'Image upload complete!!, Please check your php file directory……';
?>

UPDATE

更新

NameValuePair and Http Classes are deprecated so, I've tried this code and it's working for me. Hope that helps!

NameValuePair 和 Http Classes 已被弃用，所以我已经尝试过这段代码，它对我有用。希望有帮助！

private void uploadImage(Bitmap imageBitmap){
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    imageBitmap.compress(Bitmap.CompressFormat.PNG, 90, stream);
    byte[] b = stream.toByteArray();
    String encodedImage = Base64.encodeToString(b, Base64.DEFAULT);
    ArrayList<Pair<String, String>> params = new ArrayList<Pair<String, String>>();
    params.add(new Pair<>("image", encodedImage));

    try {
        new AsyncUploader().execute(my_upload_php, getQuery(params));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
}

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

    for(Pair<String, String> pair : params){
        if(first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(pair.first, "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(pair.second, "UTF-8"));
    }
    return result.toString();
}

private class AsyncUploader extends AsyncTask<String, Integer, String>
{
    @Override
    protected String doInBackground(String... strings) {
        String urlString = strings[0];
        String params = strings[1];
        URL url = null;
        InputStream stream = null;
        HttpURLConnection urlConnection = null;
        try {
            url = new URL(urlString);
            urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("POST");
            urlConnection.setDoOutput(true);

            urlConnection.connect();

            OutputStreamWriter wr = new OutputStreamWriter(urlConnection.getOutputStream());
            wr.write(params);
            wr.flush();

            stream = urlConnection.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"), 8);
            String result = reader.readLine();
            return result;
        }catch (IOException ioe){
            ioe.printStackTrace();
        } finally {
            if (urlConnection != null)
                urlConnection.disconnect();
        }
        return null;
    }

    @Override
    protected  void onPostExecute(String result) {
        Toast.makeText(MakePhoto.this, result, Toast.LENGTH_SHORT).show();
    }
}

回答by Dakshesh Khatri

    public JSONObject getJSONFromUrlPost(String url, String userid,
                String filepath, String status) {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(url);
            MultipartEntity entity = new MultipartEntity(
                    HttpMultipartMode.BROWSER_COMPATIBLE);
            HttpParams httpParams = httpclient.getParams();
            httpParams.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 100000);
            try {
                entity.addPart("id",
                        new StringBody(userid, Charset.forName("UTF-8")));
                entity.addPart("sharestatus",
                        new StringBody(status, Charset.forName("UTF-8")));
                entity.addPart("file", new FileBody(new File(filepath)));
                httppost.setEntity(entity);
                ResponseHandler<String> responseHandler = new BasicResponseHandler();
                String response = httpclient.execute(httppost, responseHandler);
                return new JSONObject(response.toString());
            } catch (Exception e) {
                return null;
            }
        }



------------------------------------------------------------------
in main.java  



JSONParser js = new JSONParser();
String url="";// upload file with Server url
            JSONObject data = js.getJSONFromUrlPost(url);
            String response;
            try {
                response = data.getString("Msg");
                if (response.contains("Succesfully upload file")) {
                    JSONObject jsondata = new JSONObject(data.getString("Data"));
                    Fileurl = jsondata.getString("Url");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }