将图片从android上传到Firebase后如何获取图片URL？

Question

我正在制作一个应用程序，用户将图像上传到 Firebase 存储上。上传图像后，我想将图像的 URL 和其他详细信息上传到我自己的 API。我如何获取用户刚刚上传的图像的 Uri。 This 教程教授如何上传，但不展示如何获取图像 URL。我尝试了所有教程，但没有一个显示我想要的东西。

Answer 1

根据文档，可以在

.getDownloadUrl

中调用

.onSuccessListener

来获取图片URL。

这是文档中的示例：

// Get the data from an ImageView as bytes
imageView.setDrawingCacheEnabled(true);
imageView.buildDrawingCache();
Bitmap bitmap = imageView.getDrawingCache();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] data = baos.toByteArray();

UploadTask uploadTask = mountainsRef.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) {
        // taskSnapshot.getMetadata() contains file metadata such as size, content-type, and download URL.
        Uri downloadUrl = taskSnapshot.getDownloadUrl();
    }
});

Answer 2

您将在 onSuccess 回调中获取下载 URL。检查以下代码

public static void storeInFirebase(Context context, Uri uri, String type) {

StorageReference riversRef = null;
                    mStorageRef = FirebaseStorage.getInstance().getReference();
                  //to create a separate folder with all the pictures uploaded
      riversRef = mStorageRef.child("pictures/" + "unique_value");

                    UploadTask uploadTask = riversRef.putFile(uri);
                    uploadTask.addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception exception) {
                DialogUtils.dismissProgressDialog();
                // Handle unsuccessful uploads
            }
        }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                // taskSnapshot.getMetadata() contains file metadata such as size, content-type, and download URL.
                downloadUrl = taskSnapshot.getDownloadUrl();
                Log.d("downloadUrl", "" + downloadUrl);

            }
        });
                }

Answer 3

在kotlin中可以这样获取上传的图片文件url

 private fun uploadImageToFirebase(fileUri: Uri) {
    val user = FirebaseAuth.getInstance().currentUser
    if (user != null && fileUri.toString().isNotEmpty()) {
        val storage = Firebase.storage
        val storageRef = storage.reference
        val profilePicRef = storageRef.child("profilePictures/${user.uid}.jpg").putFile(fileUri)

        profilePicRef.addOnProgressListener {
            val progress = (100.0 * it.bytesTransferred) / it.totalByteCount
            Log.d(TAG, "Upload is $progress% done")
        }.addOnPausedListener {
            Log.d(TAG, "Upload is paused")
        }.addOnSuccessListener { task ->
                task.storage.downloadUrl.addOnSuccessListener {
                    Glide.with(requireContext()).load(it).into(binding.profilePicture)
                }
            }
            .addOnFailureListener {
                Toast.makeText(requireContext(), it.message, Toast.LENGTH_SHORT).show()
            }
    } else {
        Toast.makeText(requireContext(), "User not authenticated", Toast.LENGTH_SHORT).show()
    }
}