Firebase retrieving multiple objects in multiple nodes

I am trying to read data from a firebase realTime database in android
(For some reason FireBase sorts the location data and then the VideoEntry but I think it's correct anyway...according to the json generated)

In case you needed this is how I add the nodes:

submitVideoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String locationName = locationInput.getText().toString();
double lat = Double.parseDouble(latInput.getText().toString());
double lon = Double.parseDouble(longInput.getText().toString());

String userid = mFirebaseUser.getEmail().substring(0, mFirebaseUser.getEmail().indexOf("@"));
String cleanUserId = userid.replaceAll("W", "");
updateUserInfo(cleanUserId, mFirebaseUser.getEmail(), "nsaofdhiqo3", locationName, lat, lon);
}
});

}

private void updateUserInfo(String userId, String email, String videoId, String locName, double lat, double lon) {
LocationData location = new LocationData(locName,lat,lon);
VideoEntry videoEntry = new VideoEntry(videoId,location);
UserData user = new UserData(email, videoEntry);

mDatabaseRef.child("users").child(userId).setValue(user);
}


{
"users" : {
"valentinogiuseppe00" : {
"mName" : "valentino.giuseppe00@gmail.com",
"mVideoEntry" : {
"mLocationData" : {
"mLatitude" : 58,
"mLongitude" : 10,
"mName" : "locationName"
},
"mVideoId" : "nsaofdhiqo3"
}
}
}
}


This is what I tried so far:

databaseRef.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
double lat = 0.0, lon = 0.0;
String locName = null;
String fVideoId = null, videoName = null;
String userName = null;

//TODO Need to re-structure the to add markers
for (DataSnapshot userSnapshot : dataSnapshot.getChildren()) {
Log.d(TAG, "userSnapShot children #:" + userSnapshot.getChildrenCount());
userName = userSnapshot.child(cleanUserId).getValue(String.class);
for (DataSnapshot videoSnapShot : dataSnapshot.getChildren()) {
Log.d(TAG, "videoSnapShot children #:" + videoSnapShot.getChildrenCount());
fVideoId = videoSnapShot.child("videoId").getValue(String.class);
// videoName = videoSnapShot.child("").getValue(String.class);
for (DataSnapshot locationSnapShot : dataSnapshot.getChildren()) {
Log.d(TAG, "locationSnapShot children #:" + (locationSnapShot.getChildrenCount()));
lat = locationSnapShot.child("mLatitude").getValue(Double.class);
lon = locationSnapShot.child("mLongitude").getValue(Double.class);
}
}
}
}


Please let me know if you need something else from me.

I am missing something little since I can see the map that gets generated and all the value within
Thanks fellow Devs

do you need to get the values inside mLocationData ?
– Gastón Saillén
2 days ago

Yes in a nutshell I have 3 models user,video and location. I need those values. Especially location since I am working with maps. (Can you tell me anything regarding that graphic bug regarding the nodes order)
– zepvalue
2 days ago

1 Answer
1

if you want to get all the values inside mVideoEntry with the data of mLocationData

mVideoEntry

mLocationData

do this

Create a new class that will be your pojo object this will be called userPojo.class

public class UserPojo {


private long mLatitude;
private long mLongitude;
private String mName;

public long getmLatitude() {
return mLatitude;
}

public void setmLatitude(long mLatitude) {
this.mLatitude = mLatitude;
}

public long getmLongitude() {
return mLongitude;
}

public void setmLongitude(long mLongitude) {
this.mLongitude = mLongitude;
}

public String getmName() {
return mName;
}

public void setmName(String mName) {
this.mName = mName;
}




}


then just in your reference iterate inside mVideoEntry child and get your values

databaseRef.child("users").child("valentinogiuseppe00").child("mVideoEntry").addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {

for(DataSnapshot snapShot : dataSnapshot.getChildren()){
UserPojo user= snapShot.getValue(UserPojo.class);
//Getting your values
long longitude = user.getmLongitude();
long latitude = user.getmLatitude();
String name = user.getmName();
Log.e("Data: " , "" + latitude + "" + longitude + "" + name);
}
}

@Override
public void onCancelled(DatabaseError databaseError) {
System.out.println("The read failed: " + databaseError.getCode());
}
});


with this you should be able to get all your mLocationData inside each mVideoEntry

mLocationData

mVideoEntry

I already have 3 models classes. I need to retrieve everything from that database. mName,mVideoentry and mLocationData. That unfortunately works only for one node eheh
– zepvalue
2 days ago

you can then add the values that i posted here to them and reference like i do here, but try doing this class alone and try doing this , it should work, then you can just edit your code, but for understaning purposes i think its cleaner
– Gastón Saillén
2 days ago

I already did for one node. My problem is with multiple :( We just missing something really small
– zepvalue
2 days ago

take a look at this link , this should solve your issue quora.com/…
– Gastón Saillén
2 days ago

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