Военнослужащих вижу посты друзей
Я хочу заполнить все сообщения пользователя и его друзей. Моя реализация базы данных прилагается
Реализация Пользователя
Реализация Сообщений
Текст Json: -
{
"UserTable" : {
"KhusbuDOTaATgDOTcom" : "-KIcHQ66Vig1aUjmWIfg",
"aDOTkATgDOTcom" : "-KIYwF0kWZ97pkm0od-F",
"amATaDOTa" : "-KIa86JUxWbDnqStdDxh",
"amanATaDOTa" : "-KIa9eEbHu4YNGnjpbZv",
"arnabDOTdaATgmailDOTcom" : "-KIYu5eUE04if17exaYe",
"imakshayboraATgmailDOTcom" : "-KIT9PnIJbOGigKT1BHa",
"newuserATgmailDOTcom" : "-KJ12Z9IZNz_kGNIcPs1",
"rameshDOTtATgmailDOTcom" : "-KIa0kfOzm_hlUJ_pBbV",
"sovanDOTgATgmailDOTcom" : "-KIT9WWG--HaRzCm6fg_",
"test1ATuserDOTcom" : "-KJEgt7DD125dBgwSPSh",
"testATtDOTt" : "-KIa4-dHS7-iVT9b2Jh4"
},
"message" : "Do you have data? You'll love Firebase.",
"message1" : "akshay is the best",
"posts" : {
"-KIa9UA-FUMSDg4uwVTf" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9760896 77.7576878",
"post" : "hi",
"timestamp" : 1464150389786
},
"-KIa9XhunDYdVzj0g8Dx" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9762825 77.7577278",
"post" : "hello",
"timestamp" : 1464150404299
},
"-KIcHFDcUuUu8nUO8Wg2" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9757344 77.7575097",
"post" : "hi Khusbu ",
"timestamp" : 1464185980168
},
"-KIi3chQa1WW_K3JL_O5" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.976163 77.7577681",
"post" : "hi bolo",
"timestamp" : 1464283075118
},
"-KIi7ab1al65UBp4IXDB" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"mLocation" : "12.9761519 77.7577668",
"post" : "hi",
"timestamp" : 1464284113805
},
"-KIi7dxmgIwbJnl2KnBP" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"mLocation" : "12.9761519 77.7577668",
"post" : "hibn",
"timestamp" : 1464284127520
},
"-KIi83HBrUaElIwj5bT1" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"mLocation" : "12.9761519 77.7577668",
"post" : "aka ",
"timestamp" : 1464284236238
},
"-KIi8PeO_T00FA3bRYm_" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"mLocation" : "12.9761519 77.7577668",
"post" : "ji",
"timestamp" : 1464284326992
},
"-KIiDwSd7H65RDilOZ00" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"mLocation" : "12.9760913 77.7577808",
"post" : "hj",
"timestamp" : 1464285776169
},
"-KImYPEKRS4DqwnOvi-W" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"mLocation" : "12.9761887 77.7576894",
"post" : "hi",
"timestamp" : 1464358249771
},
"-KImcjHn6vtkYmwRUiFF" : {
"author" : "-KIa9eEbHu4YNGnjpbZv",
"mLocation" : "12.9757941 77.7578351",
"post" : "mat dikhana isko",
"timestamp" : 1464359646738
},
"-KImhPxhaUcvs228_sQ6" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9761605 77.7577076",
"post" : "yum hai hum",
"timestamp" : 1464360874200
},
"-KImmbSE0ytEDxdrvt4K" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9756235 77.7576516",
"post" : "goodnight ",
"timestamp" : 1464362237046
},
"-KImrq-fVNYTZZ_7aWkG" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9761095 77.7577431",
"post" : "test1",
"timestamp" : 1464363606381
},
"-KImsBvI_v0ChkTfNr2H" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9761095 77.7577431",
"post" : "test2😃",
"timestamp" : 1464363700223
},
"-KIrKTvw8oSWfE07R6WM" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9761034 77.7577107",
"post" : "test3",
"timestamp" : 1464438485113
},
"-KIrKsN-2HRpwbRz_1nq" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9761034 77.7577107",
"post" : "test4",
"timestamp" : 1464438589263
},
"-KIrLHKJeuqxb4Wp48Qn" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"mLocation" : "12.9758123 77.7578919",
"post" : "test5",
"timestamp" : 1464438695998
},
"-KIrMwNcSBR4ykm2n5ks" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9760823 77.7576796",
"post" : "test6",
"timestamp" : 1464439130185
},
"-KIrNHQLY-PT07lEnFo1" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9760823 77.7576796",
"post" : "test 7😉",
"timestamp" : 1464439220275
},
"-KIrOKW0wkX4Jjtp_6lM" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9760568 77.7577028",
"post" : "test8",
"timestamp" : 1464439495086
},
"-KIrQE8PWxVP7dsW4LUQ" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9760223 77.7578286",
"post" : "test9",
"timestamp" : 1464439993419
},
"-KIrYsXtkfM6M2vClmCX" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.97617 77.7577447",
"post" : "test 10",
"timestamp" : 1464442260015
},
"-KIrdL0HJgyTLX6fDsjL" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9760616 77.7576665",
"post" : "test11",
"timestamp" : 1464443691516
},
"-KIv5c1OIISFBXXTeQF0" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"authorName" : "sovan",
"mLocation" : "12.9759527 77.7578142",
"post" : "hello #sovan",
"timestamp" : 1464501699050
},
"-KIwsU1TyXRV7PTYqfhv" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"authorName" : "sovan",
"mLocation" : "12.9755286 77.7579091",
"post" : "test from sovan",
"timestamp" : 1464531546607
},
"-KIwvMArad5wufME46d2" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"authorName" : "sovan",
"mLocation" : "12.9762825 77.7577278",
"post" : "test2 from sovan",
"timestamp" : 1464532300871
},
"-KIx9jBV7qqOhb_04FiR" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"authorName" : "sovan",
"mLocation" : "12.9761452 77.757783",
"post" : "test3 from sovan",
"timestamp" : 1464536331444
},
"-KIxATLiQRW6VPUulgLl" : {
"author" : "-KIT9WWG--HaRzCm6fg_",
"authorName" : "sovan",
"mLocation" : "12.9762063 77.7577588",
"post" : "test4 from sovan",
"timestamp" : 1464536524673
},
"-KJ-aFZu75WE8fu4alTM" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9791569 77.7288152",
"post" : "test12 from akshay",
"timestamp" : 1464593877941
},
"-KJ132_Yz1lInWMM1bZc" : {
"author" : "-KJ12Z9IZNz_kGNIcPs1",
"authorName" : "newuser",
"mLocation" : "12.9760395 77.7577474",
"post" : "hum hai new user",
"timestamp" : 1464618466004
},
"-KJ4SJGPOeh3OxkcVuZC" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9812033 77.7240957",
"post" : "hi test 13",
"timestamp" : 1464675421809
},
"-KJ6DbioHox2NSLR0Z8T" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9759283 77.7577924",
"post" : "feeling #great #partying # ",
"timestamp" : 1464705121602
},
"-KJ6EAoFUoGPOyduvkvf" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"mLocation" : "12.9759283 77.7577924",
"post" : "#coding",
"timestamp" : 1464705269345
},
"-KJ6J4ehY86MbFdL6mN-" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"hashTags" : [ "#you" ],
"mLocation" : "12.9757097 77.7578994",
"post" : "love making ##you",
"timestamp" : 1464706555095
},
"-KJ6JJeQ3VZ-6B59Z7xx" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"hashTags" : [ null, "#a", "#b", "#c", "#d" ],
"mLocation" : "12.9757097 77.7578994",
"post" : "#a# b #b #c #d",
"timestamp" : 1464706616439
},
"-KJ6Jqy4Q-DxJv9HCaaO" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"hashTags" : [ "#test1" ],
"mLocation" : "12.9758581 77.7577817",
"post" : "#test1",
"timestamp" : 1464706756825
},
"-KJ6JxRZ5qczbKm-e_a2" : {
"author" : "-KIT9PnIJbOGigKT1BHa",
"authorName" : "akshay",
"hashTags" : [ "#test2", "#test3" ],
"mLocation" : "12.9758581 77.7577817",
"post" : "#test2 #test3",
"timestamp" : 1464706783346
}
},
"user" : {
"-KIT9PnIJbOGigKT1BHa" : {
"email" : "imakshaybora@gmail.com",
"friends" : {
"-KIl0na9cZ1EY9jF4HSi" : "-KIa0kfOzm_hlUJ_pBbV",
"-KIl18efwTfR1sq-6unv" : "-KIcHQ66Vig1aUjmWIfg",
"-KIlN2cA8nSMU-0ljDgr" : "-KIT9WWG--HaRzCm6fg_",
"-KIlOczOGj9oWt3itAoH" : "-KIa4-dHS7-iVT9b2Jh4",
"-KIlOzMIiMIdFEfqdRWF" : "-KIYwF0kWZ97pkm0od-F",
"-KIlPas-62dWJSGaWVd7" : "-KIa86JUxWbDnqStdDxh",
"-KImcszKNBWW1O2BhZg6" : "-KIa9eEbHu4YNGnjpbZv"
},
"name" : "akshay",
"password" : "alcohol",
"uniqueId" : "-KIT9PnIJbOGigKT1BHa"
},
"-KIT9WWG--HaRzCm6fg_" : {
"email" : "sovan.g@gmail.com",
"friends" : {
"-KIlN2eNvL2poRh2L1aG" : "-KIT9PnIJbOGigKT1BHa"
},
"name" : "sovan",
"password" : "sovan",
"uniqueId" : "-KIT9WWG--HaRzCm6fg_"
},
"-KIYu5eUE04if17exaYe" : {
"email" : "arnab.da@gmail.com",
"name" : "arnab",
"password" : "arnab",
"uniqueId" : "-KIYu5eUE04if17exaYe"
},
"-KIYwF0kWZ97pkm0od-F" : {
"email" : "a.k@g.com",
"friends" : {
"-KIlOzMIiMIdFEfqdRWG" : "-KIT9PnIJbOGigKT1BHa"
},
"name" : "ardhendu ",
"password" : "ak",
"uniqueId" : "-KIYwF0kWZ97pkm0od-F"
},
"-KIa0kfOzm_hlUJ_pBbV" : {
"email" : "ramesh.t@gmail.com",
"friends" : {
"-KIl0naLO88NGJZsIWzu" : "-KIT9PnIJbOGigKT1BHa"
},
"name" : "ramesh ",
"password" : "ramesh",
"uniqueId" : "-KIa0kfOzm_hlUJ_pBbV"
},
"-KIa4-dHS7-iVT9b2Jh4" : {
"email" : "test@t.t",
"friends" : {
"-KIlOczeUi8zciZkvtSC" : "-KIT9PnIJbOGigKT1BHa"
},
"name" : "test",
"password" : "test",
"uniqueId" : "-KIa4-dHS7-iVT9b2Jh4"
},
"-KIa86JUxWbDnqStdDxh" : {
"email" : "am@a.a",
"friends" : {
"-KIlPas9zzXvWLXdJva6" : "-KIT9PnIJbOGigKT1BHa"
},
"name" : "am",
"password" : "am",
"uniqueId" : "-KIa86JUxWbDnqStdDxh"
},
"-KIa9eEbHu4YNGnjpbZv" : {
"email" : "aman@a.a",
"friends" : {
"-KImcszKNBWW1O2BhZg7" : "-KIT9PnIJbOGigKT1BHa"
},
"name" : "aman",
"password" : "aman",
"uniqueId" : "-KIa9eEbHu4YNGnjpbZv"
},
"-KIcHQ66Vig1aUjmWIfg" : {
"email" : "Khusbu.a@g.com",
"friends" : {
"-KIl18egKD9k1xv8rhd5" : "-KIT9PnIJbOGigKT1BHa"
},
"name" : "Khusbu Agarwal ",
"password" : "Khusbu",
"uniqueId" : "-KIcHQ66Vig1aUjmWIfg"
},
"-KJ12Z9IZNz_kGNIcPs1" : {
"email" : "newuser@gmail.com",
"name" : "newuser",
"password" : "newuser",
"uniqueId" : "-KJ12Z9IZNz_kGNIcPs1"
},
"-KJEgt7DD125dBgwSPSh" : {
"email" : "test1@user.com",
"name" : "testuser",
"password" : "test1",
"uniqueId" : "-KJEgt7DD125dBgwSPSh"
}
}
}
В настоящее время я достигаю этого с помощью кода ниже:
postQuery=posts.orderByChild("timestamp");
friends.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot friendSnap) {
for(DataSnapshot snap:friendSnap.getChildren()) {
friendStringList.add(snap.getValue(String.class));
}
postQuery.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot postSnap) {
postsTest.clear();
for (DataSnapshot snapshot : postSnap.getChildren()) {
if (friendStringList.contains(snapshot.getValue(PostPOJO.class).getAuthor()) || (snapshot.getValue(PostPOJO.class).getAuthor().equals(uniqueId))) {
postsTest.add(snapshot.getValue(PostPOJO.class));
}
}
Collections.reverse(postsTest);
hide();
postAdapter.notifyDataSetChanged();
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
Это хороший способ реализации или я могу использовать некоторые запросы, чтобы получить вещи в лучшем виде?
Пожалуйста, Направляйте.
1 ответ:
Теперь я реализую вышесказанное таким образом. Если у кого-то есть лучший способ реализации, пожалуйста, напишите. сначала проверка 20 сообщений, а затем прокрутка от пользователя, получающего следующий набор данных.
postQuery=posts.orderByKey().startAt("").limitToLast(20); friends.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot friendSnap) { for(DataSnapshot snap:friendSnap.getChildren()) { friendStringList.add(snap.getValue(String.class)); } postQuery.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot postSnap) { postsTest.clear(); int count=0; for (DataSnapshot snapshot : postSnap.getChildren()) { if(count==0) { start = snapshot.getKey(); count++; } // start=snapshot.getKey(); if (friendStringList.contains(snapshot.getValue(PostPOJO.class).getAuthor()) || (snapshot.getValue(PostPOJO.class).getAuthor().equals(uniqueId))) { postsTest.add(snapshot.getValue(PostPOJO.class)); } } Collections.reverse(postsTest); hide(); count=0; postAdapter.notifyDataSetChanged(); } @Override public void onCancelled(DatabaseError databaseError) { } }); } @Override public void onCancelled(DatabaseError databaseError) { } }); mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { if(dy > 0) //check for scroll down { visibleItemCount = mLayoutManager.getChildCount(); totalItemCount = mLayoutManager.getItemCount(); pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition(); if (loading) { if ( (visibleItemCount + pastVisiblesItems) >= totalItemCount) { loading = false; Log.v("...", "Last Item Wow !"); //Do pagination.. i.e. fetch new data show(); postQuery=posts.orderByKey().endAt(start).limitToLast(20); postQuery.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot postSnap) { postsList.clear(); int count=0; for (DataSnapshot snapshot : postSnap.getChildren()) { if(count==0) { start = snapshot.getKey(); count++; } //start=snapshot.getKey(); if (friendStringList.contains(snapshot.getValue(PostPOJO.class).getAuthor()) || (snapshot.getValue(PostPOJO.class).getAuthor().equals(uniqueId))) { postsList.add(snapshot.getValue(PostPOJO.class)); loading=true; } else if(snapshot.getKey().equals(FirstPostKey)){ loading=false; Snackbar.make(mView,"Reached End",Snackbar.LENGTH_LONG).show(); } } postsList.remove(postsList.size()-1); Collections.reverse(postsList); postsTest.addAll(postsList); hide(); count=0; postAdapter.notifyDataSetChanged(); } @Override public void onCancelled(DatabaseError databaseError) { } }); } } } } });