Bild hochladen mit android-upload-service

Question

Nach einigen Recherchen stieß ich auf eine offene Bibliothek für mehrteilige Datei-Upload. In meinem Fall möchte ich ein Bild hochladen mit PUT Anfrage, die die Bilder entweder aus der Galerie oder von der Kamera auswählen. Dies sind die Ressourcen, die ich bin mit: 1. https://github.com/gotev/android-upload-service 2. https://www.simplifiedcoding.net/android-upload-image-to-server/#comment-9852

ProfileSetting.java

public class ProfileSetting extends AppCompatActivity implements AdapterView.OnItemSelectedListener { 
private ImageView CustomerIcon; 
private Button confirm_button; 
//storage permission code 
private static final int STORAGE_PERMISSION_CODE = 123; 
//Bitmap to get image from gallery 
private Bitmap bitmap; 
//Uri to store the image uri 
private Uri selectedImage; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_profile_setting); 

    //Requesting storage permission 
    requestStoragePermission(); 

confirm_button.setOnClickListener(new Button.OnClickListener(){ 
     @Override 
     public void onClick(View view) { 


      uploadMultipart(); 
      //PUT VOLLEY 
      //saveProfileAccount(); 

     } 
    }); 
} 
private void showPickImageDialog() { 
    AlertDialog.Builder builderSingle = new AlertDialog.Builder(ProfileSetting.this); 
    builderSingle.setTitle("Set Image "); 

    final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
      ProfileSetting.this, 
      android.R.layout.select_dialog_singlechoice); 
    arrayAdapter.add("Gallery"); 
    arrayAdapter.add("Camera"); 

    builderSingle.setNegativeButton(
      "cancel", 
      new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int which) { 
        dialog.dismiss(); 
       } 
      }); 

    builderSingle.setAdapter(
      arrayAdapter, 
      new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int which) { 
        switch (which) { 
         case 0: 
          Intent pickPhoto = new Intent(Intent.ACTION_PICK, 
            android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
          startActivityForResult(pickPhoto, 1); 
          break; 

         case 1: 
          Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
          startActivityForResult(takePicture, 0); 
          break; 
        } 

       } 
      }); 
    builderSingle.show(); 
} 
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 
    switch(requestCode) { 
     case 0: 
      if(resultCode == RESULT_OK){ 


       selectedImage = imageReturnedIntent.getData(); 
       //CustomerIcon.setImageURI(selectedImage); 
       try{ 
        bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), selectedImage); 
        CustomerIcon.setImageBitmap(bitmap); 

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

      } 

      break; 
     case 1: 
      if(resultCode == RESULT_OK){ 

       Uri selectedImage = imageReturnedIntent.getData(); 
       //CustomerIcon.setImageURI(selectedImage); 
       try{ 
        bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), selectedImage); 
        //bitmap = bitmap.createScaledBitmap(bitmap, 150, 150, true); 
        CustomerIcon.setImageBitmap(bitmap); 




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

      } 
      break; 
    } 
} 
    /* 
* This is the method responsible for image upload 
* We need the full image path and the name for the image in this  method 
* */ 
public void uploadMultipart() { 
    //getting name for the image 
    String name = "customer_icon"; 

    //getting the actual path of the image 
    String path = getPath(selectedImage); 

    //Uploading code 
    try { 
     String uploadId = UUID.randomUUID().toString(); 

     //Creating a multi part request 
     new MultipartUploadRequest(this, uploadId, Constants.UPLOAD_URL) 
       .addFileToUpload(path, "image") //Adding file 
       .addParameter("name", name) //Adding text parameter to the request 
       .setNotificationConfig(new UploadNotificationConfig()) 
       .setMaxRetries(2) 
       .startUpload(); //Starting the upload 

    } catch (Exception exc) { 
     Toast.makeText(this, exc.getMessage(), Toast.LENGTH_SHORT).show(); 
    } 
} 

//method to get the file path from uri 
public String getPath(Uri uri) { 
    Cursor cursor = getContentResolver().query(uri, null, null, null, null); 
    cursor.moveToFirst(); 
    String document_id = cursor.getString(0); 
    document_id = document_id.substring(document_id.lastIndexOf(":") + 1); 
    cursor.close(); 

    cursor = getContentResolver().query(
      android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI, 
      null, MediaStore.Images.Media._ID + " = ? ", new String[]{document_id}, null); 
    cursor.moveToFirst(); 
    String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)); 
    cursor.close(); 

    return path; 
} 

//Requesting permission 
private void requestStoragePermission() { 
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) 
     return; 

    if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE)) { 
     //If the user has denied the permission previously your code will come to this block 
     //Here you can explain why you need this permission 
     //Explain here why you need this permission 
    } 
    //And finally ask for the permission 
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, STORAGE_PERMISSION_CODE); 
} 

//This method will be called when the user will tap on allow or deny 
@Override 
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { 

    //Checking the request code of our request 
    if (requestCode == STORAGE_PERMISSION_CODE) { 

     //If permission is granted 
     if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
      //Displaying a toast 
      Toast.makeText(this, "Permission granted now you can read the storage", Toast.LENGTH_LONG).show(); 
     } else { 
      //Displaying another toast if permission is not granted 
      Toast.makeText(this, "Oops you just denied the permission", Toast.LENGTH_LONG).show(); 
     } 
    } 
} 
} 

Ich erhalte diese Fehlermeldung:

FATAL EXCEPTION: main 
java.lang.NullPointerException: uri 

Auch ich bin nicht sicher, wie man Setzen Sie in dieser Methode Header für die Autorisierung. Bitte helfen Sie, danke!

Answer 1

String url = " http://server.yourserver.com/v1/example"; 

    try { 
     String uploadId = UUID.randomUUID().toString(); 

     //Creating a multi part request 
     MultipartUploadRequest request = new MultipartUploadRequest(this, uploadId, UPLOAD_URL); 

     request.addFileToUpload(images.getPath(), "image_url"); 
     request.setNotificationConfig(new UploadNotificationConfig()); 
     request.setMaxRetries(2); 
     request.startUpload(); //Starting the upload 

    } catch (Exception exc) { 
     Toast.makeText(this, exc.getMessage(), Toast.LENGTH_SHORT).show(); 
    } 

Answer 2

Sie können Multipart.Body von Retrofit für das Hochladen von Bildern auf den Server verwenden. This link führt Sie zum Hochladen von Dateien mit Multipart.

Answer 3

Überprüfen Sie folgenden Code. (Ich habe okHttp Bibliothek verwendet).

private int uploadFile(String imagePath) { 
    Log.i("PATH",imagePath); 
    OkHttpClient client = new OkHttpClient(); 
    File fileSource = new File(imagePath); 
    if (fileSource.isFile()){ 
     Log.i("EXIST","exist"); 
    }else { 
     Log.i("NOT EXIST","not exist"); 
    } 
    final MediaType MEDIA_TYPE; 
    String imageType; 
    if (imagePath.endsWith("png")){ 
     MEDIA_TYPE = MediaType.parse("image/png"); 
     imageType = ".png"; 
    }else { 
     MEDIA_TYPE = MediaType.parse("image/jpeg"); 
     imageType = ".jpg"; 
    } 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",Locale.US).format(new Date()); 
    String fileName = "Prathap_"+timeStamp+imageType; 


    RequestBody requestBody = new MultipartBody.Builder() 
      .setType(MultipartBody.FORM) .addFormDataPart("file",fileName,RequestBody.create(MEDIA_TYPE,fileSource)) 
      .build(); 
    Request request = new Request.Builder() 
      .url(your url)//your webservice url 
      .post(requestBody) 
      .build(); 
    try { 
     Response response = client.newCall(request).execute(); 
     if (response.isSuccessful()){ 
      Log.i("SUCC",""+response.message()); 
     } 
     String resp = response.message(); 
     Log.i("MSG",resp); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
    return 0; 
} 

fügen Sie die folgende Zeile in build.gradle unter App-Ordner hinzu.

compile 'com.squareup.okhttp3:okhttp:3.5.0'