如何在 android 中使用解析 api 在解析服务器中上传图像

Question

I want to upload an image in parse cloud server in android. But I am unable to do so.

I have tried the following code:

Drawable drawable = getResources().getDrawable(R.drawable.profilepic) ;
Bitmap bitmap = (Bitmap)(Bitmap)drawable()
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] data = stream.toByteArray();                

ParseFile imageFile = new ParseFile("image.png", data);
imageFile.saveInBackground();

Please let me know how can I do it.

Answer 1

After struggling for several hours here is code segment works for me.

1. Data Member of activity class

Bitmap bmp;
Intent i;
Uri BmpFileName = null;

2. Starting the camera. Goal is to start camera activity and BmpFileName to store the referrence to file

String storageState = Environment.getExternalStorageState();
if (storageState.equals(Environment.MEDIA_MOUNTED)) {

String path = Environment.getExternalStorageDirectory().getName() + File.separatorChar + "Android/data/" + this.getPackageName() + "/files/" + "Doc1" + ".jpg";

File photoFile = new File(path);
try {
if (photoFile.exists() == false) { 
photoFile.getParentFile().mkdirs();
photoFile.createNewFile();
}
} 
catch (IOException e) 
{
Log.e("DocumentActivity", "Could not create file.", e);
}
Log.i("DocumentActivity", path);
BmpFileName = Uri.fromFile(photoFile);
i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, BmpFileName);
startActivityForResult(i, 0);

3. Reading contents from Camera output by overriding onActivityResult. Goal is to get bmp variable valuated.

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
try {
bmp = MediaStore.Images.Media.getBitmap( this.getContentResolver(), BmpFileName);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {

// TODO Auto-generated catch block
e.printStackTrace();
}
// Myocode to display image on UI - You can ignore
if (bmp != null)
IV.setImageBitmap(bmp);
}
}

4. On Save event

// MUST ENSURE THAT YOU INITIALIZE PARSE
Parse.initialize(mContext, "Key1", "Key2");

ParseObject pObj = null;
ParseFile pFile = null ;
pObj = new ParseObject ("Document");
pObj.put("Notes", "Some Value");

// Ensure bmp has value
if (bmp == null || BmpFileName == null) {
Log.d ("Error" , "Problem with image"
return;
}

ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(CompressFormat.PNG, 100, stream);
pFile = new ParseFile("DocImage.jpg", stream.toByteArray());
try 
{
pFile.save();
pObj.put("FileName", pFile);
pObj.save();
_mParse.DisplayMessage("Image Saved");
} 
catch (ParseException e) 
{
// TODO Auto-generated catch block
_mParse.DisplayMessage("Error in saving image");
e.printStackTrace();
}

// Finish activity in my case . you may choose some thing else finish();

So here are key difference from others

• I called initialize parse. You may laugh about it but folks have spent hour's debugging code without realize that parse was not initialized
• Use Save instead of SaveInBackground. I understand that it may hold the activity but that is desired behavior for me and more importantly it works

Let me know if it does not work

Answer 2

Save ParseObject in the background

 // ParseObject ParseObject pObject = new ParseObject("ExampleObject"); pObject.put("myNumber", number); pObject.put("myString", name); pObject.saveInBackground(); // asynchronous, no callback

Save in the background with callback

pObject.saveInBackground(new SaveCallback () { @Override public void done(ParseException ex) { if (ex == null) { isSaved = true; } else { // Failed isSaved = false; } } });

Variations of the save...() method include the following:

 saveAllinBackground() saves a ParseObject with or without a callback. saveAll(List<ParseObject> objects) saves a list of ParseObjects. saveAllinBackground(List<ParseObject> objects) saves a list of ParseObjects in the background. saveEventually() lets you save a data object to the server at some point in the future; use this method if the Parse cloud is not currently accessible.

Once a ParseObject has been successfully saved on the Cloud, it is assigned a unique Object-ID. This Object-ID is very important as it uniquely identifies that ParseObject instance. You would use the Object-ID, for example, to determine if the object was successfully saved on the cloud, for retrieving and refreshing a given Parse object instance, and for deleting a particular ParseObject.

I hope you will solve your problem..

Answer 3

Parse.initialize(this, "applicationId", "clientKey");

     byte[] data = "Sample".getBytes();    //data of your image file comes here

     final ParseFile file = new ParseFile(data);
     try {
        file.save();
    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
     if (file.isDirty()){
                     //exception or error message etc 
     }
     else{

         try {
            ParseUser.logIn("username", "password");    //skip this if already logged in
        } catch (ParseException e2) {
            e2.printStackTrace();
        }
         ParseObject userDisplayImage = new ParseObject("UserDisplayImage");
            user = ParseUser.getCurrentUser();
            userDisplayImage.put("user", user);     //The logged in User
            userDisplayImage.put("displayImage", file); //The image saved previously
            try {
                userDisplayImage.save();      //image and user object saved in a new table. Check data browser
            } catch (ParseException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }

         //See how to retrieve

         ParseQuery query = new ParseQuery("UserDisplayImage");
         query.whereEqualTo("user", user);
         try {
            parseObject = query.getFirst();
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
         ParseFile imageFile = null;
          imageFile = parseObject.getParseFile("displayImage");
          try {
            byte[] imgData = imageFile.getData(); //your image data!!
        } catch (ParseException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

     }

Answer 4

Use it like this

 //Convert Bitmap to Byte array --For Saving Image to Parse Db. */

 Bitmap profileImage= "your bitmap";

 ByteArrayOutputStream blob = new ByteArrayOutputStream();

 profileImage.compress(CompressFormat.PNG, 0 /* ignored for PNG */,blob);

 imgArray = blob.toByteArray();

 //Assign Byte array to ParseFile
 parseImagefile = new ParseFile("profile_pic.png", imgArray);

 parseUser.getCurrentUser().put("columname in parse db", parseImagefile);
 parseUser.getCurrentUser().saveInBackground();

I hope this will help you..

Answer 5

Simple code of Imageupload and retriving using Glide to parse.

Image Upload

destination_profile is File object of you want to upload image path.

    ParseUser currentUser = ParseUser.getCurrentUser();
    if (destination_profile != null) {
            Glide.with(getActivity()).load(destination_profile.getAbsolutePath()).asBitmap().toBytes().centerCrop().into(new SimpleTarget<byte[]>() {
                @Override
                public void onResourceReady(byte[] resource, GlideAnimation<? super byte[]> glideAnimation) {


                    final ParseFile parseFile = new ParseFile(destination_profile.getName(), resource);
                    parseFile.saveInBackground(new SaveCallback() {
                        @Override
                        public void done(ParseException e) {
                            currentUser.put("picture", parseFile);
                            currentUser.saveInBackground(new SaveCallback() {
                                @Override
                                public void done(ParseException e) {
                                    showToast("Profile image upload success");
                                }
                            });
                        }
                    });


                }
            });
        }

Image Retriving

img_userProfilePicture_bg is boject of ImageView where you want to set image.

    ParseUser currentUser = ParseUser.getCurrentUser();
    if (currentUser.has("picture")) {
        ParseFile imageFile = (ParseFile) currentUser.get("picture");
        imageFile.getDataInBackground(new GetDataCallback() {
            public void done(final byte[] data, ParseException e) {
                if (e == null) {

                    Glide.with(getActivity()).load(data).centerCrop().into(img_userProfilePicture_bg);

                } else {
                    // something went wrong
                }
            }
        });
    }

Answer 6

Assuming you have your bitmap file bitmap .

    ParseObject object = new ParseObject("NameOfClass");

    ByteArrayOutputStream stream = new ByteArrayOutputStream();

    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
    byte[] scaledData = stream.toByteArray();

    ParseFile image = new ParseFile("image.jpeg",scaledData);
    image.saveInBackground(new SaveCallback() {
        @Override
        public void done(ParseException e) {
            if (e==null)
                //Image has been saved as a parse file.
            else
                //Failed to save the image as parse file.
        }
    });

    object.put("images",image);
    object.saveInBackground(new SaveCallback() {
        @Override
        public void done(ParseException e) {
            if (e==null)
                //Image has been successfuly uploaded to Parse Server.
            else
                //Error Occured.
        }
    });

It is important to convert the Bitmap into byte[] and then uploading the Parse File before associating it with the Parse Object.