图像使用改造从android上传到PHP服务器

Question

I am uploading image to server using retrofit. I am encoding image to bitmap and then convert bitmap to string and passing string to PHP. On PHP side I decode image again and then save to server folder. It works perfectly if I compress image quality to 30 but app crashes and shows null pointer if I set image quality to 100.

Here is my Code:

ResultActivity:

if (requestCode == 1 && null != data) {
            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);
            // photo = BitmapFactory.decodeFile(picturePath);


            profile_photo = 
ImageUtils.getInstant().getCompressedBitmap(picturePath);
            Uri tempUri = getImageUri(this, profile_photo);
            cursor.close();
            profile_image.setImageResource(android.R.color.transparent);
            Picasso.get()
                    .load(tempUri)
                    .resize(150, 150)
                    .into(profile_image);
            profile_image.setScaleType(ImageView.ScaleType.FIT_XY);
            profile_image.setPadding(5, 5, 5, 5);
            //Bitmap profile_photo = ((BitmapDrawable) 
profile_image.getDrawable()).getBitmap();
            upload_profileimage();

            b.dismiss();

        }

Bitmap to string:

public String BitmapTOString(Bitmap bitmap) {

    Bitmap bm = bitmap;
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.JPEG, 100, stream);
    byte[] byteFormat = stream.toByteArray();
    String imgString = Base64.encodeToString(byteFormat, Base64.DEFAULT);
    return imgString;


}

Retrofit API call:

call = user_profileimge_interface.profileImage_uplaod(BitmapTOString(profile_photo), user_id);

PHP Code:

$data = $baseurl.'user_profile_pictures/'.$user_id.".JPEG";
file_put_contents($data, base64_decode($profile_picture));
echo json_encode(Array('message' => "image inserted"));

API interface:

@POST("update_profilepic.php")
Call<Profile_Image_updateJson> profileImage_uplaod(@Query("profile_picture") String profileImage,
                                                   @Query("user_id") String user_id);

Answer 1

I'd suggest sending bitmap as binary data rather than converting to/from string. For example:

@POST
Call<Profile_Image_updateJson> profileImage_uplaod(@Query("user_id") String user_id, @Body RequestBody body);

and then something like:

requestBody = RequestBody.create(MediaType.parse("image/jpeg"), imageBytes)
call = user_profileimge_interface.profileImage_uplaod(user_id, requestBody);