Question

当我在UI上使用firebase初始化数据和setText时，它被延迟了10~15秒。另一方面，当我使用Volley时，它只延迟了1秒钟。

为什么我使用firebase时速度太慢？如何修改此代码？

这是我的代码（使用ValueEventListener）和JSON树

"couple_profile" : {
"TEST999AhCBcHK32AQzU3JglVbAxhTD6Mn1" : {
  "birthday_1" : "1994-06-29",
  "birthday_2" : "19940629",
  "couple_nick" : "TEST999",
  "exp" : 0,
  "gold" : 0,
  "level" : 1,
  "member" : {
    "AhCBcHK32AQzU3JglVbAxhTD6Mn1" : {
      "FCM" : "d5Y-fl_0VCs:APA91bHX7HA531PXc1e4clUg61uB3XsKlwmQ_2U9OaESUTP0r-dnwbitSvxQ4EDMqPzK-t_5b9qPOhLm01FRffgB9-Ot6bZmx1JzwZvc07yoyhashGUS79E7Dztr2J7NfR1NGXw1LT2V",
      "birthday" : "1994-06-29",
      "name" : "김준겸",
      "phone_number" : "01050639201"
    },
    "FMsH7leNTOXBgbOFoWdaTMjt05T2" : {
      "birthday" : "19940629",
      "name" : "kimGod",
      "phone_number" : "1541"
    }
  },
  "mileage" : 0,
  "name_1" : "김준겸",
  "name_2" : "kimGod",
  "uid_1" : "AhCBcHK32AQzU3JglVbAxhTD6Mn1",
  "uid_2" : "FMsH7leNTOXBgbOFoWdaTMjt05T2"
}


private void get_home_info() {
    valueEventListener = new ValueEventListener() {
        @Override
        public void onDataChange(final DataSnapshot dataSnapshot) {
            coupleProfile = dataSnapshot.getValue(CoupleProfile.class);
            if (coupleProfile == null) {
                Log.e(TAG, "User " + FirebaseAuth.getInstance().getCurrentUser().getEmail() + " is unexpectedly null_1");
                Toast.makeText(Home_Fragment.this.getContext(), "Error_1", Toast.LENGTH_SHORT).show();
            } else {

                StorageReference storageRef2 = storage.getReferenceFromUrl("FirebaseURL").child("Profile_image/" + FirebaseAuth.getInstance().getCurrentUser().getUid());

                Glide.with(getContext()).using(new FirebaseImageLoader()).load(storageRef2).centerCrop()
                        .bitmapTransform(new CropCircleTransformation(new CustomBitmapPool()))
                        .into(me_view);
                SharedPreferences.Editor sh = home_info.edit();

                if (My_UID.equals(coupleProfile.uid_1)) {
                    my_number = 1;
                    sh.putString("my_name",coupleProfile.name_1);
                    sh.putString("op_name",coupleProfile.name_2);
                    sh.apply();
                    my_name_text.setText(coupleProfile.name_1);
                    op_name_text.setText(coupleProfile.name_2);
                    state_text.setText(coupleProfile.state_1);
                    op_state_text.setText(coupleProfile.state_2);
                    StorageReference storageRef = storage.getReferenceFromUrl("FirebaseURL").child("Profile_image/" + coupleProfile.uid_2);
                    Glide.with(getContext()).using(new FirebaseImageLoader()).load(storageRef).centerCrop()
                            .diskCacheStrategy(DiskCacheStrategy.ALL)
                            .bitmapTransform(new CropCircleTransformation(new CustomBitmapPool()))
                            .into(friend_view);

                } else if (My_UID.equals(coupleProfile.uid_2)) {
                    my_number = 2;
                    sh.putString("my_name",coupleProfile.name_2);
                    sh.putString("op_name",coupleProfile.name_1);
                    sh.apply();
                    my_name_text.setText(coupleProfile.name_2);
                    op_name_text.setText(coupleProfile.name_1);
                    state_text.setText(coupleProfile.state_2);
                    op_state_text.setText(coupleProfile.state_1);

                    StorageReference storageRef = storage.getReferenceFromUrl("FirebaseURL").child("Profile_image/" + coupleProfile.uid_1);

                    Glide.with(getContext()).using(new FirebaseImageLoader()).load(storageRef).centerCrop().diskCacheStrategy(DiskCacheStrategy.SOURCE)
                            .bitmapTransform(new CropCircleTransformation(new CustomBitmapPool()))
                            .diskCacheStrategy(DiskCacheStrategy.ALL)
                            .into(friend_view);


                } else {
                    Log.e(TAG, "User " + FirebaseAuth.getInstance().getCurrentUser().getEmail() + " is unexpectedly null_2");
                    Toast.makeText(Home_Fragment.this.getContext(), "Error", Toast.LENGTH_SHORT).show();
                }

            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Log.w(TAG, "onCancelled: ", databaseError.toException());

        }
    };
    ref = databaseReference.child("couple_profile").child(room_token);
    ref.addValueEventListener(valueEventListener);
}

Answer 1

我认为如果你从firebase使用这个方法，你将有更好的数据加载：

FirebaseDatabase.getInstance().setPersistenceEnabled(true);

使用上面的代码，解释一下：

Firebase在离线数据时提供了极大的支持。它在没有互联网连接时自动离线存储数据。当设备连接到互联网时，所有数据都将被推送到实时数据库。但是，即使应用程序重新启动，启用磁盘持久性也会使数据脱机。

同时尝试并检索onStart()

中的数据

Android Firebase实时数据库获取数据的速度非常慢

1 个答案: