Saya ingin tahu cara mana yang terbaik untuk mengunggah gambar ke server tanpa kehilangan kualitasnya. Saya telah mencari di google menemukan berbagai metode pengeposan data. Tapi saya tidak yakin mana yang terbaik untuk diunggah. Saya datang
- Unggahan Gambar Multibagian.
- Mengupload gambar menggunakan array byte
- Mengupload gambar menggunakan string berenkode base64.
Saya telah mencoba pengkodean Base64 itu membawa saya ke OOM (Memori habis) jika gambar dalam resolusi terlalu tinggi. Tutorial apa pun yang menangani masalah ini akan dihargai. Terima kasih sebelumnya.
Jawaban:
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK); photoPickerIntent.setType("image/*"); startActivityForResult(photoPickerIntent, 1);
KODE DI ATAS UNTUK MEMILIH GAMBAR DARI GALERI
@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); }
SEKARANG POSTING DATA DENGAN MENGGUNAKAN DATA FORMULIR MULTIPART
HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("LINK TO SERVER");
DATA FORMULIR multibagian
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")); }
AKHIRNYA POSTING DATA KE SERVER
httppost.setEntity(mpEntity); HttpResponse response = httpclient.execute(httppost);
sumber
Kelas kegiatan utama untuk memilih dan mengunggah
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(); } } }
kode php untuk menangani gambar unggahan dan juga membuat gambar dari data yang dikodekan base64
<?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"; } } ?>
sumber
gunakan kode di bawah ini untuk membantu Anda ....
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
sumber
Coba metode ini untuk mengunggah file Gambar dari kamera
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()); } }
Penggunaan kelas untuk mengunggah
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(); } }
Layanan untuk mengunggah
<?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")); } ?>
sumber