Question

在我的Android应用的AccountActivity中，用户可以更改其个人资料设置（例如图片，姓名，电子邮件等）。

我编写的代码将获取用户选择的图像的URI，并将其上传到Firebase Storage，然后获取其下载URL 并将其存储在Cloud Firestore中。

但是在将图像上传到存储设备之前，我想压缩图像Uri，然后将原始图像和压缩后的图像上传到存储设备。最后，我想下载压缩图像的网址，以在活动中显示它。

我尝试了很多代码，而这是我最后尝试的代码：

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == GALLERY_REQUEST_CODE && resultCode == RESULT_OK) {

            accountImageProgressBar.setVisibility(View.VISIBLE);

            Uri fileUri = data.getData();

            StorageReference accountImagesReferences = storageReference.child("Users Images").child(userID + "/" + fileUri.getLastPathSegment());

            Bitmap bitmap = ((BitmapDrawable) accountImage.getDrawable()).getBitmap();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
            byte[] bytes = baos.toByteArray();

            // Upload To Storage
            UploadTask uploadTask = accountImagesReferences.putBytes(bytes);
            uploadTask

                    .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {

                    accountImageProgressBar.setVisibility(View.INVISIBLE);
                    Toast.makeText(AccountActivity.this, "Upload Failed!", Toast.LENGTH_SHORT).show();

                }
            })

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

                    accountImageProgressBar.setVisibility(View.INVISIBLE);
                    Toast.makeText(AccountActivity.this, "Upload Success", Toast.LENGTH_SHORT).show();

                }
            });

            // Get Download Url
            Task<Uri> urlTask = uploadTask.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
                @Override
                public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {

                    if (!task.isSuccessful()) {

                        throw task.getException();

                    }

                    // Continue with the task to get the download URL
                    return accountImagesReferences.getDownloadUrl();

                }
            })
                    .addOnCompleteListener(new OnCompleteListener<Uri>() {
                        @Override
                        public void onComplete(@NonNull Task<Uri> task) {

                            if (task.isSuccessful()) {

                                Uri downloadUri = task.getResult();
                                firebaseFirestore.collection("Users").document(userID).update("image", downloadUri.toString());
                                loadInfo(userID);

                            } else {

                                Toast.makeText(AccountActivity.this, "Task Not Successful", Toast.LENGTH_SHORT).show();

                            }

                        }
                    });

        }

    }

Answer 1

这将完全满足您的要求。如果不是，那是因为“用户”未通过firebase进行身份验证，因此您需要通过电子邮件或匿名身份验证进行注册

private static final int RESULT_GALLERY = 1;
private Uri imageUri;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button button = findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent galleryIntent = new Intent(
                    Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
            startActivityForResult(galleryIntent, RESULT_GALLERY);
        }
    });
}


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

    switch (requestCode) {
        case RESULT_GALLERY:
            if (null != data) {
                imageUri = data.getData();
                UploadImages();
            }
            break;
        default:
            break;
    }
}
private byte[] compress(Uri image){
    Uri selectedImage = image;

    InputStream imageStream = null;
    try {
        imageStream = getContentResolver().openInputStream(
                selectedImage);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

    Bitmap bmp = BitmapFactory.decodeStream(imageStream);

    ByteArrayOutputStream stream = new ByteArrayOutputStream();

    bmp.compress(Bitmap.CompressFormat.JPEG, 20, stream);
    byte[] byteArray = stream.toByteArray();
    try {
        stream.close();
        stream = null;
        return byteArray;
    } catch (IOException e) {

        e.printStackTrace();
    }

    return null;
}

public void UploadImages() {
     final StorageReference ref = FirebaseStorage.getInstance().getReference().child("/images/");
    //Uploading original file.
    UploadTask uploadTask = ref.putFile(imageUri);
    Task<Uri> urlTask = uploadTask.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
        @Override
        public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {
            if (!task.isSuccessful()) {
                throw task.getException();
            }

            // Continue with the task to get the download URL
            return ref.getDownloadUrl();
        }
    }).addOnCompleteListener(new OnCompleteListener<Uri>() {
        @Override
        public void onComplete(@NonNull Task<Uri> task) {
            //Original file download url.
            final StorageReference ref2 = FirebaseStorage.getInstance().getReference().child("Compressed");

            String downloadUri = String.valueOf(task.getResult());
            //Uploading compressed file.
            byte[] data = compress(imageUri);
            UploadTask uploadTask = ref2.putBytes(data);
            Task<Uri> urlTask = uploadTask.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
                @Override
                public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {
                    if (!task.isSuccessful()) {
                        throw task.getException();
                    }

                    // Continue with the task to get the download URL
                    return ref2.getDownloadUrl();
                }
            }).addOnCompleteListener(new OnCompleteListener<Uri>() {
                @Override
                public void onComplete(@NonNull Task<Uri> task) {
                    //Compressed file download url
                    String downloadUri = String.valueOf(task.getResult());

                }
            });
        }
    });
}

}

压缩Uri映像并上传Firebase存储

1 个答案: