서버 안드로이드에 이미지 업로드

서버 안드로이드에 이미지 업로드

---

품질 저하없이 이미지를 서버에 업로드하는 가장 좋은 방법을 알고 싶었습니다. 나는 Google에서 데이터를 게시하는 다양한 방법을 찾았습니다. 그러나 어떤 것이 업로드하는 것이 가장 좋을지 모르겠습니다. 나는 만났다

1. 멀티 파트 이미지 업로드.
2. 바이트 배열을 사용하여 이미지 업로드
3. base64 인코딩 문자열을 사용하여 이미지 업로드.

Base64 인코딩을 시도했는데 이미지의 해상도가 너무 높으면 OOM (메모리 부족)이 발생합니다. 이 문제를 다루는 모든 자습서를 주시면 감사하겠습니다. 미리 감사드립니다.

---

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, 1);

갤러리에서 이미지를 선택하려면 위 코드

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 1)
        if (resultCode == Activity.RESULT_OK) {
            Uri selectedImage = data.getData();

            String filePath = getPath(selectedImage);
            String file_extn = filePath.substring(filePath.lastIndexOf(".") + 1);
            image_name_tv.setText(filePath);

            try {
                if (file_extn.equals("img") || file_extn.equals("jpg") || file_extn.equals("jpeg") || file_extn.equals("gif") || file_extn.equals("png")) {
                    //FINE
                } else {
                    //NOT IN REQUIRED FORMAT
                }
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
}

public String getPath(Uri uri) {
    String[] projection = {MediaColumns.DATA};
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    column_index = cursor
            .getColumnIndexOrThrow(MediaColumns.DATA);
    cursor.moveToFirst();
    imagePath = cursor.getString(column_index);

    return cursor.getString(column_index);
}

이제 다중 양식 데이터를 사용하여 데이터 게시

HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("LINK TO SERVER");

멀티 파트 양식 데이터

MultipartEntity mpEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
if (filePath != null) {
    File file = new File(filePath);
    Log.d("EDIT USER PROFILE", "UPLOAD: file length = " + file.length());
    Log.d("EDIT USER PROFILE", "UPLOAD: file exist = " + file.exists());
    mpEntity.addPart("avatar", new FileBody(file, "application/octet"));
}

마지막으로 서버에 데이터 게시

httppost.setEntity(mpEntity);
HttpResponse response = httpclient.execute(httppost);

---

선택 및 업로드 할 주요 활동 클래스

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore;
//import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.ByteArrayOutputStream;
import java.util.ArrayList;


public class MainActivity extends Activity {

    Button btpic, btnup;
    private Uri fileUri;
    String picturePath;
    Uri selectedImage;
    Bitmap photo;
    String ba1;
    public static String URL = "Paste your URL here";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btpic = (Button) findViewById(R.id.cpic);
        btpic.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                clickpic();
            }
        });

        btnup = (Button) findViewById(R.id.up);
        btnup.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                upload();
            }
        });
    }

    private void upload() {
        // Image location URL
        Log.e("path", "----------------" + picturePath);

        // Image
        Bitmap bm = BitmapFactory.decodeFile(picturePath);
        ByteArrayOutputStream bao = new ByteArrayOutputStream();
        bm.compress(Bitmap.CompressFormat.JPEG, 90, bao);
        byte[] ba = bao.toByteArray();
       //ba1 = Base64.encodeBytes(ba);

        Log.e("base64", "-----" + ba1);

        // Upload image to server
        new uploadToServer().execute();

    }

    private void clickpic() {
        // Check Camera
        if (getApplicationContext().getPackageManager().hasSystemFeature(
                PackageManager.FEATURE_CAMERA)) {
            // Open default camera
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

            // start the image capture Intent
            startActivityForResult(intent, 100);

        } else {
            Toast.makeText(getApplication(), "Camera not supported", Toast.LENGTH_LONG).show();
        }
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == 100 && resultCode == RESULT_OK) {

            selectedImage = data.getData();
            photo = (Bitmap) data.getExtras().get("data");

            // Cursor to get image uri to display

            String[] filePathColumn = {MediaStore.Images.Media.DATA};
            Cursor cursor = getContentResolver().query(selectedImage,
                    filePathColumn, null, null, null);
            cursor.moveToFirst();

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

            Bitmap photo = (Bitmap) data.getExtras().get("data");
            ImageView imageView = (ImageView) findViewById(R.id.Imageprev);
            imageView.setImageBitmap(photo);
        }
    }

    public class uploadToServer extends AsyncTask<Void, Void, String> {

        private ProgressDialog pd = new ProgressDialog(MainActivity.this);
        protected void onPreExecute() {
            super.onPreExecute();
            pd.setMessage("Wait image uploading!");
            pd.show();
        }

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

            ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("base64", ba1));
            nameValuePairs.add(new BasicNameValuePair("ImageName", System.currentTimeMillis() + ".jpg"));
            try {
                HttpClient httpclient = new DefaultHttpClient();
                HttpPost httppost = new HttpPost(URL);
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                HttpResponse response = httpclient.execute(httppost);
                String st = EntityUtils.toString(response.getEntity());
                Log.v("log_tag", "In the try Loop" + st);

            } catch (Exception e) {
                Log.v("log_tag", "Error in http connection " + e.toString());
            }
            return "Success";

        }

        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            pd.hide();
            pd.dismiss();
        }
    }
}

업로드 이미지를 처리하고 base64 인코딩 데이터에서 이미지를 생성하는 PHP 코드

<?php
error_reporting(E_ALL);
if(isset($_POST['ImageName'])){
$imgname = $_POST['ImageName'];
$imsrc = base64_decode($_POST['base64']);
$fp = fopen($imgname, 'w');
fwrite($fp, $imsrc);
if(fclose($fp)){
 echo "Image uploaded";
}else{
 echo "Error uploading image";
}
}
?>

---

아래 코드를 사용하면 도움이됩니다 ....

        BitmapFactory.Options options = new BitmapFactory.Options();

        options.inSampleSize = 4;
        options.inPurgeable = true;
        Bitmap bm = BitmapFactory.decodeFile("your path of image",options);

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        bm.compress(Bitmap.CompressFormat.JPEG,40,baos); 


        // bitmap object

        byteImage_photo = baos.toByteArray();

                    //generate base64 string of image

                   String encodedImage =Base64.encodeToString(byteImage_photo,Base64.DEFAULT);

  //send this encoded string to server

---

카메라에서 이미지 파일 을 업로드하려면 이 방법을 시도하십시오.

package com.example.imageupload;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.message.BasicHeader;

public class MultipartEntity implements HttpEntity {

private String boundary = null;

ByteArrayOutputStream out = new ByteArrayOutputStream();
boolean isSetLast = false;
boolean isSetFirst = false;

public MultipartEntity() {
    this.boundary = System.currentTimeMillis() + "";
}

public void writeFirstBoundaryIfNeeds() {
    if (!isSetFirst) {
        try {
            out.write(("--" + boundary + "\r\n").getBytes());
        } catch (final IOException e) {

        }
    }
    isSetFirst = true;
}

public void writeLastBoundaryIfNeeds() {
    if (isSetLast) {
        return;
    }
    try {
        out.write(("\r\n--" + boundary + "--\r\n").getBytes());
    } catch (final IOException e) {

    }
    isSetLast = true;
}

public void addPart(final String key, final String value) {
    writeFirstBoundaryIfNeeds();
    try {
        out.write(("Content-Disposition: form-data; name=\"" + key + "\"\r\n")
                .getBytes());
        out.write("Content-Type: text/plain; charset=UTF-8\r\n".getBytes());
        out.write("Content-Transfer-Encoding: 8bit\r\n\r\n".getBytes());
        out.write(value.getBytes());
        out.write(("\r\n--" + boundary + "\r\n").getBytes());
    } catch (final IOException e) {

    }
}

public void addPart(final String key, final String fileName,
        final InputStream fin) {
    addPart(key, fileName, fin, "application/octet-stream");
}

public void addPart(final String key, final String fileName,
        final InputStream fin, String type) {
    writeFirstBoundaryIfNeeds();
    try {
        type = "Content-Type: " + type + "\r\n";
        out.write(("Content-Disposition: form-data; name=\"" + key
                + "\"; filename=\"" + fileName + "\"\r\n").getBytes());
        out.write(type.getBytes());
        out.write("Content-Transfer-Encoding: binary\r\n\r\n".getBytes());

        final byte[] tmp = new byte[4096];
        int l = 0;
        while ((l = fin.read(tmp)) != -1) {
            out.write(tmp, 0, l);
        }
        out.flush();
    } catch (final IOException e) {

    } finally {
        try {
            fin.close();
        } catch (final IOException e) {

        }
    }
}

public void addPart(final String key, final File value) {
    try {
        addPart(key, value.getName(), new FileInputStream(value));
    } catch (final FileNotFoundException e) {

    }
}

public long getContentLength() {
    writeLastBoundaryIfNeeds();
    return out.toByteArray().length;
}

public Header getContentType() {
    return new BasicHeader("Content-Type", "multipart/form-data; boundary="
            + boundary);
}

public boolean isChunked() {
    return false;
}

public boolean isRepeatable() {
    return false;
}

public boolean isStreaming() {
    return false;
}

public void writeTo(final OutputStream outstream) throws IOException {
    outstream.write(out.toByteArray());
}

public Header getContentEncoding() {
    return null;
}

public void consumeContent() throws IOException,
        UnsupportedOperationException {
    if (isStreaming()) {
        throw new UnsupportedOperationException(
                "Streaming entity does not implement #consumeContent()");
    }
}

public InputStream getContent() throws IOException,
        UnsupportedOperationException {
    return new ByteArrayInputStream(out.toByteArray());
}

}

업로드를위한 수업 사용

private void doFileUpload(File file_path) {

    Log.d("Uri", "Do file path" + file_path);

    try {

        HttpClient client = new DefaultHttpClient();
        //use your server path of php file
        HttpPost post = new HttpPost(ServerUploadPath);

        Log.d("ServerPath", "Path" + ServerUploadPath);

        FileBody bin1 = new FileBody(file_path);
        Log.d("Enter", "Filebody complete " + bin1);

        MultipartEntity reqEntity = new MultipartEntity();
        reqEntity.addPart("uploaded_file", bin1);
        reqEntity.addPart("email", new StringBody(useremail));

        post.setEntity(reqEntity);
        Log.d("Enter", "Image send complete");

        HttpResponse response = client.execute(post);
        resEntity = response.getEntity();
        Log.d("Enter", "Get Response");
        try {

            final String response_str = EntityUtils.toString(resEntity);
            if (resEntity != null) {
                Log.i("RESPONSE", response_str);
                JSONObject jobj = new JSONObject(response_str);
                result = jobj.getString("ResponseCode");
                Log.e("Result", "...." + result);

            }
        } catch (Exception ex) {
            Log.e("Debug", "error: " + ex.getMessage(), ex);
        }
    } catch (Exception e) {
        Log.e("Upload Exception", "");
        e.printStackTrace();
    }
}

업로드 서비스

   <?php
$image_name = $_FILES["uploaded_file"]["name"]; 
$tmp_arr = explode(".",$image_name);
$img_extn = end($tmp_arr);
$new_image_name = 'image_'. uniqid() .'.'.$img_extn;    
$flag=0;                 

if (file_exists("Images/".$new_image_name))
{
           $msg=$new_image_name . " already exists."
           header('Content-type: application/json');        
           echo json_encode(array("ResponseCode"=>"2","ResponseMsg"=>$msg));        
}else{  
move_uploaded_file($_FILES["uploaded_file"]["tmp_name"],"Images/". $new_image_name);
                   $flag = 1;
}   

if($flag == 1){                    
            require 'db.php';   
            $static_url =$new_image_name;
            $conn=mysql_connect($db_host,$db_username,$db_password) or die("unable to connect localhost".mysql_error());
            $db=mysql_select_db($db_database,$conn) or die("unable to select message_app"); 
            $email = "";
            if((isset($_REQUEST['email'])))
            {
                     $email = $_REQUEST['email'];
            }

    $sql ="insert into alert(images) values('$static_url')";

     $result=mysql_query($sql);

     if($result){
    echo json_encode(array("ResponseCode"=>"1","ResponseMsg"=> "Insert data successfully.","Result"=>"True","ImageName"=>$static_url,"email"=>$email));
       } else
       {

         echo json_encode(array("ResponseCode"=>"2","ResponseMsg"=> "Could not insert data.","Result"=>"False","email"=>$email));
        }
}
    else{
    echo json_encode(array("ResponseCode"=>"2","ResponseMsg"=> "Erroe While Inserting Image.","Result"=>"False"));
    }
    ?>

참고 URL : https://stackoverflow.com/questions/20322528/uploading-images-to-server-android