在将图像上传到 Firebase 存储之前压缩图像

Question

我试图在使用 SiliCompressor 库将图像上传到 Firebase Storage 之前压缩图像，但它似乎不起作用，ProgressDialog 没有停止。我首先做的是通过单击 ImageButton 从 Gallery 中选择 Image 到 ImageButton 中。下面是我的代码。

imageSelect.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
                galleryIntent.setType("image/");
                startActivityForResult(galleryIntent, GALLERY_REQUEST);
            }
        });

---------------------------------------------------------------------

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == GALLERY_REQUEST && resultCode == RESULT_OK) {


            imageUri = data.getData();

           // imageSelect.setImageBitmap(BitmapFactory.decodeFile(imageSelectFile.getAbsolutePath()));
        //    Compressor com = Compressor.getDefault(this).compressToFile(imageFile);
           // imageSelect.setImageURI(imageUri);
            Picasso.with(c).load(imageUri).fit().into(imageSelect);

        }
    }

所以现在我有一个方法 startPosting() 可以通过单击按钮将数据上传到 Firebase 存储。下面是我的代码。

 private void startPosting() {
        mProgress.setMessage("Uploading Image...");
        //Compressing an Image ....
        String stringUri= imageUri.toString();
        Uri uri_image_final;
        //String filePath = SiliCompressor.with(getApplicationContext()).compress(stringUri);
        String filePath = SiliCompressor.with(getApplicationContext()).compress(stringUri, true);
        uri_image_final = Uri.parse(filePath);
        System.out.println("Whats here :" +
                ""+ uri_image_final);

        final String title_val = mPostTitle.getText().toString().trim();
        final String desc_val = mPostDesc.getText().toString().trim();
        if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && filePath != null) {
            mProgress.show();
            StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());
            filepath.putFile(uri_image_final).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {


                    Uri downloadUri = taskSnapshot.getDownloadUrl();
                    DatabaseReference newPost = mDatabase.push();
                    DatabaseReference c = mDatabase.push();
                    newPost.child("EventTitle").setValue(title_val);
                    newPost.child("EventDescription").setValue(desc_val);
                    newPost.child("EventImage").setValue(downloadUri.toString());
                    newPost.child("PostId").setValue(c);



                    mProgress.dismiss();
                    startActivity(new Intent(PostActivity.this, MainActivity.class));


                }
            }


            );


        } else if (TextUtils.isEmpty(title_val) && TextUtils.isEmpty(desc_val) && imageUri != null) {
            mProgress.show();
            StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());
            filepath.putFile(uri_image_final).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {


                    Uri downloadUri = taskSnapshot.getDownloadUrl();
                    DatabaseReference newPost = mDatabase.push();
                    newPost.child("EventTitle").setValue("");
                    newPost.child("EventDescription").setValue("");
                    newPost.child("EventImage").setValue(downloadUri.toString());


                    mProgress.dismiss();
                   // startActivity(new Intent(PostActivity.this, MainActivity.class));
                  Intent load=  new Intent(PostActivity.this,MainActivity.class);
                    load.putExtra(eventname,eventname);
                    startActivity(load);


                }
            }


            );

        }

        else if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && imageUri== null){

            Toast.makeText(getApplicationContext(),"Please insert an Image and Upload ! ",Toast.LENGTH_LONG).show();

        }
    }

现在，如果您在该方法中看到，我的本质是压缩加载到 ImageButton 中的图像，然后将其上传到 firebase。这是 Silicon Compressor 行，它试图压缩加载到 ImageButton 中的图像。

 String filePath = SiliCompressor.with(getApplicationContext()).compress(stringUri, true);

我从 Github 的 link 得到了这个库。 https://github.com/Tourenathan-G5organisation/SiliCompressor

请问我哪里错了，因为图片没有上传，但我希望它在压缩时上传。

Answer 1

这是我写的，你可以试试

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode == RESULT_OK) {
        if (requestCode == Constants.PICK_USER_PROFILE_IMAGE) {
            if (resultCode == RESULT_OK) {
                Bitmap bmp = ImagePicker.getImageFromResult(this, resultCode, data);//your compressed bitmap here
                startPosting(bmp);
            }
        }
    }
}

你的 startPosting 方法应该是这样的

 private void startPosting(Bitmap bmp) {
    byte[] data = bmp.toByteArray();
    mProgress.setMessage("Uploading Image...");

    final String title_val = mPostTitle.getText().toString().trim();
    final String desc_val = mPostDesc.getText().toString().trim();
    if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && filePath != null) {
        mProgress.show();
        StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());


        UploadTask uploadTask = filepath.putBytes(data);
        uploadTask.addOnFailureListener(new OnFailureListener() {
              @Override
              public void onFailure(@NonNull Exception exception) {
                // Handle unsuccessful uploads
              }
        }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
              @Override
              public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

            Uri downloadUri = taskSnapshot.getDownloadUrl();
            DatabaseReference newPost = mDatabase.push();
            DatabaseReference c = mDatabase.push();
            newPost.child("EventTitle").setValue(title_val);
            newPost.child("EventDescription").setValue(desc_val);
            newPost.child("EventImage").setValue(downloadUri.toString());
            newPost.child("PostId").setValue(c);



            mProgress.dismiss();
            startActivity(new Intent(PostActivity.this, MainActivity.class));


        }
    });


    } else if (TextUtils.isEmpty(title_val) && TextUtils.isEmpty(desc_val) && imageUri != null) {
        mProgress.show();
        StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());
        UploadTask uploadTask = filepath.putBytes(data);
        uploadTask.addOnFailureListener(new OnFailureListener() {
              @Override
              public void onFailure(@NonNull Exception exception) {
                // Handle unsuccessful uploads
              }
        }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
              @Override
              public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

                Uri downloadUri = taskSnapshot.getDownloadUrl();
                DatabaseReference newPost = mDatabase.push();
                newPost.child("EventTitle").setValue("");
                newPost.child("EventDescription").setValue("");
                newPost.child("EventImage").setValue(downloadUri.toString());


                mProgress.dismiss();
               // startActivity(new Intent(PostActivity.this, MainActivity.class));
                Intent load=  new Intent(PostActivity.this,MainActivity.class);
                load.putExtra(eventname,eventname);
                startActivity(load);


            }
        });

    }

    else if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && imageUri== null){

        Toast.makeText(getApplicationContext(),"Please insert an Image and Upload ! ",Toast.LENGTH_LONG).show();

    }
}

下面是 class ImagePicker 有一系列的方法来完成你的工作

public class ImagePicker {

private static final int DEFAULT_MIN_WIDTH_QUALITY = 400;        // min pixels
private static final String TAG = "ImagePicker";
private static final String TEMP_IMAGE_NAME = "tempImage";

public static int minWidthQuality = DEFAULT_MIN_WIDTH_QUALITY;

public static Bitmap getImageFromResult(Context context, int resultCode,
                                        Intent imageReturnedIntent) {
    Log.d(TAG, "getImageFromResult, resultCode: " + resultCode);
    Bitmap bm = null;
    File imageFile = getTempFile(context);
    if (resultCode == Activity.RESULT_OK) {
        Uri selectedImage;
        boolean isCamera = (imageReturnedIntent == null ||
                imageReturnedIntent.getData() == null ||
                imageReturnedIntent.getData().equals(Uri.fromFile(imageFile)));
        if (isCamera) {     /** CAMERA **/
            selectedImage = Uri.fromFile(imageFile);
        } else {            /** ALBUM **/
            selectedImage = imageReturnedIntent.getData();
        }
        Log.d(TAG, "selectedImage: " + selectedImage);

        bm = getImageResized(context, selectedImage);
        int rotation = getRotation(context, selectedImage, isCamera);
        bm = rotate(bm, rotation);
    }
    return bm;
}


private static Bitmap decodeBitmap(Context context, Uri theUri, int sampleSize) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = sampleSize;

    AssetFileDescriptor fileDescriptor = null;
    try {
        fileDescriptor = context.getContentResolver().openAssetFileDescriptor(theUri, "r");
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

    Bitmap actuallyUsableBitmap = BitmapFactory.decodeFileDescriptor(
            fileDescriptor.getFileDescriptor(), null, options);

    Log.d(TAG, options.inSampleSize + " sample method bitmap ... " +
            actuallyUsableBitmap.getWidth() + " " + actuallyUsableBitmap.getHeight());

    return actuallyUsableBitmap;
}

/**
 * Resize to avoid using too much memory loading big images (e.g.: 2560*1920)
 **/
private static Bitmap getImageResized(Context context, Uri selectedImage) {
    Bitmap bm = null;
    int[] sampleSizes = new int[]{5, 3, 2, 1};
    int i = 0;
    do {
        bm = decodeBitmap(context, selectedImage, sampleSizes[i]);
        Log.d(TAG, "resizer: new bitmap width = " + bm.getWidth());
        i++;
    } while (bm.getWidth() < minWidthQuality && i < sampleSizes.length);
    return bm;
}


private static int getRotation(Context context, Uri imageUri, boolean isCamera) {
    int rotation;
    if (isCamera) {
        rotation = getRotationFromCamera(context, imageUri);
    } else {
        rotation = getRotationFromGallery(context, imageUri);
    }
    Log.d(TAG, "Image rotation: " + rotation);
    return rotation;
}

private static int getRotationFromCamera(Context context, Uri imageFile) {
    int rotate = 0;
    try {

        context.getContentResolver().notifyChange(imageFile, null);
        ExifInterface exif = new ExifInterface(imageFile.getPath());
        int orientation = exif.getAttributeInt(
                ExifInterface.TAG_ORIENTATION,
                ExifInterface.ORIENTATION_NORMAL);

        switch (orientation) {
            case ExifInterface.ORIENTATION_ROTATE_270:
                rotate = 270;
                break;
            case ExifInterface.ORIENTATION_ROTATE_180:
                rotate = 180;
                break;
            case ExifInterface.ORIENTATION_ROTATE_90:
                rotate = 90;
                break;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return rotate;
}

public static int getRotationFromGallery(Context context, Uri imageUri) {
    String[] columns = {MediaStore.Images.Media.ORIENTATION};
    Cursor cursor = context.getContentResolver().query(imageUri, columns, null, null, null);
    if (cursor == null) return 0;

    cursor.moveToFirst();

    int orientationColumnIndex = cursor.getColumnIndex(columns[0]);
    return cursor.getInt(orientationColumnIndex);
}


private static Bitmap rotate(Bitmap bm, int rotation) {
    if (rotation != 0) {
        Matrix matrix = new Matrix();
        matrix.postRotate(rotation);
        Bitmap bmOut = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);
        return bmOut;
    }
    return bm;
}


 private static File getTempFile(Context context) {
        File imageFile = new File(context.getExternalCacheDir(), TEMP_IMAGE_NAME);
        imageFile.getParentFile().mkdirs();
        return imageFile;
    }
}

ImagePicker Class 拥有处理图像压缩和旋转的所有方法。

希望对您有所帮助

感谢 link 上传文件 ref

Uploading files on firebase

Answer 2

我是这样做的：

private void startPosting() {

        mProgress.setMessage(getString(R.string.downloading_route));

        final String titleVal  = mRouteTitle.getText().toString().trim();
        final String descVal  = mRouteDesc.getText().toString().trim();

        if (!TextUtils.isEmpty(titleVal) && !TextUtils.isEmpty(descVal) && mImageUri != null) {

            mProgress.show();

            StorageReference filepath = mStorage.child("Route images").child(mImageUri.getLastPathSegment());

            //compress image
            mSelectImage.setDrawingCacheEnabled(true);
            mSelectImage.buildDrawingCache();
            Bitmap bitmap = mSelectImage.getDrawingCache();
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream);
            byte[] data = byteArrayOutputStream.toByteArray();

            UploadTask uploadTask = filepath.putBytes(data);

            uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

                    @SuppressWarnings("VisibleForTests")
                    final Uri downloadUrl = taskSnapshot.getDownloadUrl();

                    final DatabaseReference newPost = mDatabase.push();

                    mDatabaseUser.addValueEventListener(new ValueEventListener() {
                        @Override
                        public void onDataChange(DataSnapshot dataSnapshot) {

                            newPost.child("title").setValue(titleVal);
                            newPost.child("desc").setValue(descVal);
                            newPost.child("image").setValue(downloadUrl.toString());
                            newPost.child("uid").setValue(mCurrentUser.getUid());
                            newPost.child("username").setValue(dataSnapshot.child("name").getValue()).addOnCompleteListener(new OnCompleteListener<Void>() {
                                @Override
                                public void onComplete(@NonNull Task<Void> task) {

                                    startActivity(new Intent(AddRouteActivity.this, MainActivity.class));

                                }
                            });

                        }

                        @Override
                        public void onCancelled(DatabaseError databaseError) {



                        }
                    });

                    mProgress.dismiss();

                }
            });

        }
    }

Answer 3

//declear local variable first

位图位图； Uri imageUri;

//button action to call Image picker method

ImageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(Intent.createChooser(intent,"Pick Image"),GALLERY_REQ_CODE);
        }
    });

//get bitmap from onActivityResult

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == GALLERY_REQ_CODE && resultCode == RESULT_OK && data != null) {
        imageUri = data.getData();
        try {
            bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
        } catch (IOException e) {
            e.printStackTrace();
        }
        imageView.setImageURI(imageUri);
    }
}

//compress image first then upload to firebase

public void postImage() {
    StorageReference storageReference = mStorageRef.child("Images/" + //imageName);
    databaseReference = FirebaseDatabase.getInstance().getReference().child("Jobs").child(//imageName);

    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 20, bytes);
    String path = MediaStore.Images.Media.insertImage(SaveJobActivity.this.getContentResolver(),bitmap,//imageName,null);

    Uri uri = Uri.parse(path);
    storageReference.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
        @Override
        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
            taskSnapshot.getStorage().getDownloadUrl().addOnCompleteListener(new OnCompleteListener<Uri>() {
                @Override
                public void onComplete(@NonNull Task<Uri> task) {
                    final String downloadUrl = task.getResult().toString();

                    if (task.isSuccessful()){
                        Map<String, Object> update_hashMap = new HashMap<>();

            **//assign download url in hashmap to upadate database reference**

                        update_hashMap.put("Image",downloadUrl);

            **//update database children here**

                        databaseReference.updateChildren(update_hashMap).addOnCompleteListener(new OnCompleteListener<Void>() {
                            @Override
                            public void onComplete(@NonNull Task<Void> task) {
                                if (task.isSuccessful()){
                                    //do what you want
                                }else {
                                    //show exception
                                }
                            }
                        });
                    }else{
                        //show exception
                    }
                }
            });
        }
    });
}

在将图像上传到 Firebase 存储之前压缩图像

Compressing an Image before Uploading it to Firebase Storage

java

android

image-compression

firebase

firebase-storage