Firebase实时数据库，可链接同一对象中的图像

Question

如果你有这样的课，有没有可能

public class UserInfo {
    String name;
    String age;
    String url;
}

首先从android上传图像，该图像保存在firebase存储中。在下一步中，您将发布您的姓名、年龄和上次上传图像使用的存储空间，并将此图像与姓名和年龄链接

举个例子

姓名：'John'

年龄：50

url:firebase url图像

Answer 1

我已经使用过这种类型的任务

根据您的要求尝试此代码，

  StorageReference riversRef = mStorageRef.child("posts/images" + userId + "/" + String.valueOf(System.currentTimeMillis()) + ".jpg");
                            riversRef.putBytes(bytes)
                                    .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                                        @Override
                                        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                                            // Get a URL to the uploaded content
                                            Uri downloadUrl = taskSnapshot.getDownloadUrl();
                                            Log.d("downloadUrl", "" + downloadUrl);

                                            writeNewPost(userId, user.getUsername(), user.getProfilePic(), String.valueOf(downloadUrl), body);
                                        }
                                    })
                                    .addOnFailureListener(new OnFailureListener() {
                                        @Override
                                        public void onFailure(@NonNull Exception exception) {
                                            // Handle unsuccessful uploads
                                            // ...

                                        }
                                    }).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                                @Override
                                public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                                    //calculating progress percentage
                                    double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();

                                    //displaying percentage in progress dialog
                                }
                            });

和WriteNewPost函数如下-

private void writeNewPost(String userId, String username, String userImage, String img, String body) {
    // Create new post at /user-posts/$userid/$postid and at
    // /posts/$postid simultaneously
    String key = mDatabase.child(KeyTAG.TAG_POSTS).push().getKey();
    Post post = new Post(userId, username, body, img, userImage, key, DateTimeUtil.GetUTCdatetimeAsDate(),"image","noThumb");
    Map<String, Object> postValues = post.toMap();

    Map<String, Object> childUpdates = new HashMap<>();
    childUpdates.put("/" + KeyTAG.TAG_POSTS + "/" + key, postValues);

    mDatabase.updateChildren(childUpdates);
    mDialog.hide();

}

Answer 2

创建模型类，

   public class Model implements Serializable {
   public String name;
   public String age;
   public String photoUrl;

   public Model (){
   }

public Model (String name, String age,String photoUrl){
   this.name= name;
   this.age= age;
   this.photoUrl= photoUrl;
}
}  

在Firebase存储中插入映像，

  UploadTask uploadTask;
  uploadTask = imagePathReference.putBytes(dataNew);
  uploadTask.addOnFailureListener(new OnFailureListener() {
  @Override
  public void onFailure(@NonNull Exception exception) {
   Log.e("firebase ", " addOnFailureListener ");
  }
 }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {

 @Override
 public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
 //taskSnapShot u will get the download url.
 }
 });

保存下载url，然后在获得姓名和年龄后进入下一步

    Model user = new Model (name,age,url);

在此对象（用户）中，您将拥有所有数据。现在将对象保存在实时firebase表中。

Answer 3

是的。您只需简单地使用Firebase存储上传图像，在回调中您可以获得该图像的可下载网址。然后将所有值放入自定义对象中，并将该对象保存在Firebase实时数据库中。