I am developing an Android app, and I have already implemented authentication with Firebase. After logging in, in my NavigationDrawerActivity
I have a ListView
that I had set a FirebaseListAdapater
to that gets user specific data.
In my onCreate()
method I have the following:
firebaseAuth = FirebaseAuth.getInstance();
FirebaseUser localUser = firebaseAuth.getCurrentUser();
String localUserEmail = localUser.getEmail();
String localUserEmailUniqueID = getEmailAddressUniqueID(localUserEmail);
String dbUsersRoot = "https://DATABASENAME.firebaseio.com/Users/";
String dbUniqueRefForCurrentUser = dbUsersRoot + localUserEmailUniqueID +"/parishioners";
DatabaseReference databaseReferenceCurrentUser = FirebaseDatabase.getInstance().getReferenceFromUrl(dbUniqueRefForCurrentUser);
final FirebaseListAdapter<String> firebaseListAdapter = new FirebaseListAdapter<String>(
this,
String.class,
android.R.layout.simple_list_item_2,
databaseReferenceCurrentUser
) {
@Override
protected void populateView(View v, String model, int position) {
TextView textView = (TextView) v.findViewById(android.R.id.text1);
textView.setText(model);
}
};
mListView.setAdapter(firebaseListAdapter);
Now, in my onStart()
method I have added an setOnClickListener
to a button that wishes to add a new item into my list , like this :
@Override
protected void onStart(){
super.onStart();
mButtonAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
firebaseAuth = FirebaseAuth.getInstance();
FirebaseUser localUser = firebaseAuth.getCurrentUser();
String localUserEmail = localUser.getEmail();
String localUserEmailUniqueID = getEmailAddressUniqueID(localUserEmail);
String dbUsersRoot = "https://DATABASENAME.firebaseio.com/Users/";
String dbUniqueRefForCurrentUser = dbUsersRoot + localUserEmailUniqueID +"/parishioners";
DatabaseReference databaseReferenceCurrentUser = FirebaseDatabase.getInstance().getReferenceFromUrl(dbUniqueRefForCurrentUser);
databaseReferenceCurrentUser.push().setValue(editTextNewMember.getText().toString().trim());
}
});
}
On clicking the Add Button, I'll have in my database something like this (supposing the EditText
has in it the string 'capuccino'):
"luminittta" : {
"parishioners" : {
"-KX1GcEWPMy7oFWgt_3h" : "capuccino"
Now, my List will show 'capuccino' (since it's a realtime database my list will automatically get updated with the newly added value).
My question is:
How can I implement next a delete functionality that when the user long clicks an item from the ListView
it gets removed?
Entire Database looks like this:
{
"Users" : {
"davidivanmircea" : {
"parishioners" : {
"-KX1FNcgSXgsMNz6QRIS" : "Gus Crick",
"-KX1FVIzzPM4nMrMvm9x" : "Florentino Williams",
"-KX1FZ27M-KS5TQZQ76u" : "Marc Raff",
"-KX1FbercKpPrl9r9tb4" : "Frederick Haddon",
"-KX1FgguOlRRN4sZKS8Z" : "Cristobal Wolfe",
"-KX1FkgwifQLIHplsZNx" : "Scott Nodal",
"-KX1Fp64Sa2QD94GR9uK" : "Odis Nevers",
"-KX1FrYK5PeuBucEiamY" : "Chauncey Mossman",
"-KX1FvIBDSrvppC3e4Ip" : "Alfonso Ignacio",
"-KX1Fy7dEHH8Z9JV-BRL" : "Douglas Hettinger",
"-KX1WdtbV4PEiscJV6E_" : "Daniel Muresan",
"-KX1WvYqekJZdWS6wGh6" : "Angelina Jolie"
}
},
"luminittta" : {
"parishioners" : {
"-KX1GYuSsgmHyGk5LQLA" : "mocha",
"-KX1G_Q130sWitNGzlAR" : "triplo",
"-KX1GaPIhuIyhV4vmLGe" : "latte",
"-KX1GcEWPMy7oFWgt_3h" : "capuccino",
"-KX1Gf7TKY3N8IQETig-" : "machiatto",
"-KX1Gh4KoYpcVpCDFI2x" : "cafe melange",
"-KX1GoCutX3XO-CRWWB3" : "ristretto",
"-KX1GpvdE5i9UR2ZaX0K" : "americano",
"-KX1Grb8S5QZu4HT9cuW" : "espresso"
}
}
}
}
Thank you very much for your help !
PS: I have modified my actual database name with 'DATABASENAME' inside the code.