尝试一下:

StorageReference ref = storage.getReference();
StorageReference reference = ref.child("images.jpg");

reference.getMetadata().addOnSuccessListener(new OnSuccessListener<StorageMetadata>() {
@Override
public void onSuccess(StorageMetadata storageMetadata) {
    Log.i("The size of the file is:", storageMetadata.getSizeBytes());
  }
}).addOnFailureListener(new OnFailureListener() {
   @Override
   public void onFailure(@NonNull Exception exception) {

    }
});

使用getSizeBytes()，您将能够获取文件的大小.

Using getSizeBytes() you will be able to get the size of the file.

public long getSizeBytes ():

退货 StorageReference对象的存储大小(以字节为单位)

Returns the stored Size in bytes of the StorageReference object

public StorageMetadata ():

创建一个StorageMetadata对象以保存StorageReference的元数据.

Creates a StorageMetadata object to hold metadata for a StorageReference.

有关更多信息，请检查以下内容:

For more info check this:

https://developers.google.com/android/reference/com/google/firebase/storage/StorageMetadata.html https://firebase.google.com/docs/storage/android/file-metadata