I have very big problem. I have this structure in my Firebase:
I would like to save this structure in JSON file/String no matter. I would get such a result:
{
"-Ka8_NYNxaFCcZQ3eaTp" : {
"Persons" : {
"-KaHUTUan-l06OVjsUlu" : {
"birthDay" : "13.01.2017",
"deathDay" : "06.01.2017",
"lastName" : "LastName1",
"latitude" : "54.2039383",
"longitude" : "16.1930868",
"name" : "name1"
},
"-KaHU_nPOE2NlqTbhLxT" : {
"birthDay" : "11.01.2017",
"deathDay" : "03.01.2017",
"lastName" : "LastName2",
"latitude" : "54.2039383",
"longitude" : "16.1930868",
"name" : "name2"
}
},
"city" : "Wroclaw",
"county" : "county1",
"nameCemetery" : "nameCemetery1",
"province" : "province1",
"street" : "street1"
}
I tried through DataSnaphot but the result was not in the format JSON, e.g:
{-Ka8_NYNxaFCcZQ3eaTp={nameCemetery=nameCemetery1, street=street1, county=county1, province=province1, Persons={-KaHU_nPOE2NlqTbhLxT={name=Damian, latitude=54.2039383, lastName=Szeeczyk, birthDay=11.01.2017, longitude=16.1930868, deathDay=03.01.2017}, -KaHUTUan-l06OVjsUlu={name=name1, latitude=54.2039383, lastName=LastName1, birthDay=13.01.2017, longitude=16.1930868, deathDay=06.01.2017}}, city=Wroclaw}}
The most important for me is not to create JSONArray Persons, because then my application will run incorrectly.
In short, I would like to make a copy node (in my example key -"Ka8_NYNxaFCcZQ3eaTp"
Related
In my application I am downloading very large, complex, JSON files (over 100MB) from the server. The structure of these files can differ and I don't always know the key names. Because of this I cannot create a custom object to hold the data. The one thing that I do always know is that the file contains an array of objects. What I need to do is convert each object into a JsonObject and add it to a Kotlin List to be used in a RecyclerView and other places throughout the app.
What I do currently is download the JSON as a Reader object using OKHttp like this:
val jsonStream = response.body!!.charStream()
From there I use Gson's JsonReader to iterate through the file and create my JSON objects.
val array = mutableListOf<JsonObject>()
JsonReader(jsonStream).use {reader ->
reader.beginArray()
while (reader.hasNext()) {
val json = JsonParser.parseReader(reader).asJsonObject
array.add(json)
}
}
Here is an example of what an object looks like:
{
"employee" : [
{
"person_id" : 1441815,
"id" : 1441815,
"first" : "Steve",
"last" : "Eastin",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 1470429,
"id" : 1470429,
"first" : "Kerry",
"last" : "Remsen",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 1471551,
"id" : 1471551,
"first" : "Clu",
"last" : "Gulager",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 1604199,
"id" : 1604199,
"first" : "Brian",
"last" : "Wimmer",
"movie_custom_id" : 3916884,
"middle" : "",
"job" : "actor"
},
{
"person_id" : 1632559,
"id" : 1632559,
"first" : "Lyman",
"last" : "Ward",
"movie_custom_id" : 3916884,
"middle" : "",
"job" : "actor"
},
{
"person_id" : 1788526,
"id" : 1788526,
"first" : "Christie",
"last" : "Clark",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 1869213,
"id" : 1869213,
"first" : "Sydney",
"last" : "Walsh",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 1892343,
"id" : 1892343,
"first" : "Robert",
"last" : "Rusler",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 1961713,
"id" : 1961713,
"first" : "Jack",
"last" : "Sholder",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 2476997,
"id" : 2476997,
"first" : "Tom",
"last" : "McFadden",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 3401109,
"id" : 3401109,
"first" : "Allison",
"last" : "Barron",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 8201549,
"id" : 8201549,
"first" : "JoAnn",
"last" : "Willette",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 27936448,
"id" : 27936448,
"first" : "Melinda",
"last" : "Fee",
"custom_id" : 3916884,
"middle" : "O."
},
{
"person_id" : 40371176,
"id" : 40371176,
"first" : "Steven",
"last" : "Smith",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 45323542,
"id" : 45323542,
"first" : "Kimberly",
"last" : "Lynn",
"custom_id" : 3916884,
"middle" : ""
},
{
"person_id" : 45323546,
"id" : 45323546,
"first" : "Jonathan",
"last" : "Hart",
"custom_id" : 3916884,
"middle" : ""
}
],
"id" : 3916884,
"array1" : [
"3",
"4",
"5"
],
"date_added" : "2020-10-10 15:26:09",
"number1" : 1985,
"verified" : 0,
"number2" : 14446757,
"string1" : "test string 1",
"null1" : null,
"string2" : "test string 2",
"null2" : null,
"number3" : 0,
"array2" : [
"1",
"2",
"3"
],
"string3" : "test string 3",
"string4" : "test string 4",
"null3" : null,
"null4" : null,
"number4" : 1
}
My JSON files can contain 10,000+ objects. The issue I am having is that I'm running out of memory. Through a lot of testing I've determined that it is because of the nested array of employee objects. Is there a way to parse this file more efficiently, to prevent running out of memory, or am I going to have to come up with a different solution to handle this amount of data?
{
"Events" : {
"events" : {
"-KT5UMQAhDHs1bB8bKLc" : {
"activity" : "biking",
"address" : "54°05'45.8\"N 28°19'02.9\"E, просп. Мира 9, Жодино, Беларусь",
"category" : "sport",
"creatorID" : "m11EvlP19OSbEz8XYl2MsNCwGXX2",
"date" : 1475431200689,
"forFriends" : true,
"info" : "вттчтвт",
"name" : "ьаьатвтвтт",
"uid" : "-KT5UMQAhDHs1bB8bKLc"
},
"-KUSsl7RaL-dVoDCoSYT" : {
"activity" : "picnic",
"address" : "Узденский район, Узденский район, Беларусь",
"category" : "entertainment",
"creatorID" : "1RXDSJzSEXakxvNdM41Ae3nbHN72",
"date" : 1477328400000,
"forFriends" : false,
"info" : "45",
"name" : "Test of date",
"uid" : "-KUSsl7RaL-dVoDCoSYT"
}
},
"FriendsOF" : {
"NuKweeGv8zTgt1Vi9RcU3i1u86U2" : {
"1RXDSJzSEXakxvNdM41Ae3nbHN72" : true
},
"m11EvlP19OSbEz8XYl2MsNCwGXX2" : {
"1RXDSJzSEXakxvNdM41Ae3nbHN72" : true
}
},
"Users" : {
"1RXDSJzSEXakxvNdM41Ae3nbHN72" : {
"email" : "*#gmail.com",
"name" : "Алексей Гвоздицкий",
"picture" : "*.jpg"
},
"NuKweeGv8zTgt1Vi9RcU3i1u86U2" : {
"email" : "*#gmail.com",
"name" : "Ольга Гвоздицкая",
"picture" : "*.jpg"
},
"m11EvlP19OSbEz8XYl2MsNCwGXX2" : {
"email" : "*#gmail.com",
"name" : "Егор Александров",
"picture" : "*.jpg"
}
}
}
I have a list of "events". Every "event" can be "forFiends" only (only if current user is in event creators "FriendsOF" list, then he can see this event. FriendsOF it's a whitelist). All availiable for current user events i want to represent in RecyclerView.
I am stucked. I can get all data snapshot and then filter on client side it. But it is not way of Jedi, because i load tonns of unnecessary data. Another solution is to deny acces to event if user should not see it. But i don't understand how to do it. My ref is mEventsRef = FirebaseDatabase.getInstance().getReference().child("Events").child("events"); And rule i can make for
"events":{
"$eventId":{".read":....}
}
So according to this guide i'll get empty recyclerView because of "error callback triggered with PERMISSION_DENIED"
Help me to solve my problem please!
I have a child node that looks like this:
and I want to get the data and put the userID in the from of array. So that I can iterate and write data in those userID. However currently I am unable to figure out how to read from the database and get the userID into an array.
I only want the userID in the array. Where the node is like (friends/"key"/userID).
here is the json -
"friends" : {
"-KVFPNlR76oIsnvdeuEr" : {
"userID" : "QbfjBiy7yhTT9Bi9H8dLNv7h0A02",
"userName" : "michael s speed",
"userPhoto" : ""
},
"-KVFPNmS42zrefrGKM2L" : {
"userID" : "QbfjBiy7yhTT9Bi9H8dLNv7h0A02",
"userName" : "michael s speed",
"userPhoto" : ""
},
"-KVQWEH4xY1-88vyUmKd" : {
"userID" : "ZEBXY8WmQaWIza4L2ptSPpKUQGY2",
"userName" : "michael dinesh",
"userPhoto" : ""
},
"-KVVeqLtEji4b1ZW3gcj" : {
"userID" : "Hvf69rGDTsgQgBLdnUcg5uGZSgB2",
"userName" : "rina bora",
"userPhoto" : ""
}
},
Having the following data:
"animals" : {
"a1" : {
"name" : "Dog"
},
"a2" : {
"name" : "Cat"
},
"a3" : {
"name" : "Cow"
}
},
"users" : {
"u1" : {
"favAnimals" : {
"a1" : true,
"a2" : true
},
"name" : "Danilo"
}
}
How can I display for the user, using the FirebaseListAdapter, the complete list of animals, highlighing user's favorite animals?
Is it possible to query and join them, to get a Database Reference that would watch for changes both in "/animals" and "/users/$uid/favAnimals" and return something like:
"animals" : {
"a1" : {
"name" : "Dog",
"fav" : true
},
"a2" : {
"name" : "Cat"
"fav" : true
},
"a3" : {
"name" : "Cow"
}
}
I am using the original retrofit to call the Instagram api. The call returns this reponse
{ "data" : [ { "attribution" : null,
"caption" : { "created_time" : "1460953831",
"from" : { "full_name" : "Edward ♕",
"id" : "282525924",
"profile_picture" : "https://scontent.cdninstagram.com/t51.2885-19/s150x150/12519400_165282517199271_1363863979_a.jpg",
"username" : "manlike_eddy"
},
"id" : "17847512245075242",
"text" : "Oh girl"
},
"comments" : { "count" : 1,
"data" : [ { "created_time" : "1460953885",
"from" : { "full_name" : "Edward ♕",
"id" : "282525924",
"profile_picture" : "https://scontent.cdninstagram.com/t51.2885-19/s150x150/12519400_165282517199271_1363863979_a.jpg",
"username" : "manlike_eddy"
},
"id" : "17847512257075242",
"text" : "#love #TagsForLikes #TagsForLikesApp #instagood #me #smile #follow #cute #photooftheday #tbt #followme #girl #beautiful #happy #picoftheday #instadaily #food #swag #amazing #TFLers #fashion #igers #fun #summer #instalike #bestoftheday #smile #like4like #friends #instamood"
} ]
},
"created_time" : "1460953831",
"filter" : "Normal",
"id" : "1230892414266144399_282525924",
"images" : { "low_resolution" : { "height" : 320,
"url" : "https://scontent.cdninstagram.com/t51.2885-15/s320x320/e35/12965764_932183320233898_1928407701_n.jpg?ig_cache_key=MTIzMDg5MjQxNDI2NjE0NDM5OQ%3D%3D.2.l",
"width" : 320
},
"standard_resolution" : { "height" : 640,
"url" : "https://scontent.cdninstagram.com/t51.2885-15/s640x640/sh0.08/e35/12965764_932183320233898_1928407701_n.jpg?ig_cache_key=MTIzMDg5MjQxNDI2NjE0NDM5OQ%3D%3D.2.l",
"width" : 640
},
"thumbnail" : { "height" : 150,
"url" : "https://scontent.cdninstagram.com/t51.2885-15/s150x150/e35/c257.0.565.565/12950340_1566398773652655_1170974002_n.jpg?ig_cache_key=MTIzMDg5MjQxNDI2NjE0NDM5OQ%3D%3D.2.c",
"width" : 150
}
},
"likes" : { "count" : 0,
"data" : [ ]
},
"link" : "https://www.instagram.com/p/BEVAiEVDnaP/",
"location" : null,
"tags" : [ "beautiful",
"cute",
"fashion",
"love",
"summer",
"food",
"instalike",
"tbt",
"tagsforlikesapp",
"igers",
"follow",
"instadaily",
"instamood",
"friends",
"girl",
"me",
"swag",
"like4like",
"tflers",
"followme",
"instagood",
"tagsforlikes",
"amazing",
"bestoftheday",
"fun",
"smile",
"photooftheday",
"picoftheday",
"happy"
],
"type" : "image",
"user" : { "full_name" : "Edward ♕",
"id" : "282525924",
"profile_picture" : "https://scontent.cdninstagram.com/t51.2885-19/s150x150/12519400_165282517199271_1363863979_a.jpg",
"username" : "manlike_eddy"
},
"user_has_liked" : false,
"users_in_photo" : [ ]
} ],
}
}
As you can see some of the labels are using snakecase, such as standard_resolution. When I plug this data into Json Pogo it creates two classes for standard_resolution. One named StandardResolution and one StandardResolution. When I call .getStandardResolution() on the respective object null is returned, even though it should have valid data.