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Eric Cheng edited this page Nov 29, 2022
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23 revisions
when you use these you will see import issues. Hover and use suggested import. In case of conflict, DO NOT USE KOTLIN IMPORT. Always use google import
Run this AFTER data is pushed to the database. Put intent swap in the run() function.
//import this version of handler
import android.os.Handler;
//...
// Redirect to profile view once done
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
//time delay to allow database to update
//TODO: PUT INTENT SWAP CODE HERE
}
}, 300);User Registration
User Signup. Can redirect intents inside the if else. task.getException() will display why user signup failed. IMPORTANT: REPLACE displayName = "Eric Cheng" with value pulled from text field (must do textfield.getText or whatever inside the if, variables will be out of scope) to set display Name
FirebaseAuth mAuth = FirebaseAuth.getInstance();
mAuth.createUserWithEmailAndPassword("[email protected]", "password").addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task)
{
if (task.isSuccessful()) {
System.out.println(getApplicationContext() + "Registration successful!");
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
String displayName = "Eric Cheng";
UserProfileChangeRequest profileUpdates = new UserProfileChangeRequest.Builder()
.setDisplayName(displayName).build();
user.updateProfile(profileUpdates);
FirebaseDatabase root;
DatabaseReference reference;
root = FirebaseDatabase.getInstance();
UserModel newUser = new UserModel(user.getUid(),user.getEmail(),user.getDisplayName(), new HashMap<>(), new HashMap<>());
reference = root.getReference("users");
reference.child(newUser.getUid()).setValue(newUser);
}
else {
// Registration failed
System.out.println(task.getException());
System.out.println(
getApplicationContext() +
" Registration failed!!"
+ " Please try again later");
}
}
});User Login.
FirebaseAuth mAuth = FirebaseAuth.getInstance();
mAuth.signInWithEmailAndPassword("[email protected]", "password").addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task)
{
if (task.isSuccessful()) {
System.out.println(getApplicationContext() + "Registration successful!");
// if the user created intent to login activity
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
System.out.println(user.getDisplayName());
System.out.println(user.getEmail());
System.out.println(user.getUid());
}
else {
// Registration failed
System.out.println(task.getException());
System.out.println(
getApplicationContext() +
" Login failed!!"
+ " Please try again later");
}
}
});User Logout
FirebaseAuth.getInstance().signOut()
.then(function() {
// Sign-out successful.
})
.catch(function(error) {
// An error happened
});Accessing User info. Can be done anywhere as long as past login/signin flow
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null) {
// Name, email address, uid
String name = user.getDisplayName();
String email = user.getEmail();
String uid = user.getUid();
}Get list of beaches. Work must be done inside else condition with the List of BeachModels
FirebaseDatabase root = FirebaseDatabase.getInstance();
root.getReference("beaches").get().addOnCompleteListener(new OnCompleteListener<DataSnapshot>() {
@Override
public void onComplete(@NonNull Task<DataSnapshot> task) {
if (!task.isSuccessful()) {
Log.e("firebase", "Error getting data", task.getException());
}
else {
GenericTypeIndicator<HashMap<String, BeachModel>> t = new GenericTypeIndicator<HashMap<String,BeachModel>>() {}; //beaches are Id'd by name
List<BeachModel> beachList = new ArrayList<>(task.getResult().getValue(t).values());
Log.d("firebase", String.valueOf(beachList));
}
}
});Search for a specific beach by name. case sensitive.
Replace beachNameToSearch with the beach name to search;
String beachNameToSearch = "beach1";
FirebaseDatabase root = FirebaseDatabase.getInstance();
root.getReference("beaches").child(beachNameToSearch).get().addOnCompleteListener(new OnCompleteListener<DataSnapshot>() {
@Override
public void onComplete(@NonNull Task<DataSnapshot> task) {
if (!task.isSuccessful()) {
Log.e("firebase", "Error getting data", task.getException());
}
else {
BeachModel beachResult = task.getResult().getValue(BeachModel.class);
System.out.println(beachResult);
}
}
});Create Review. Beach name (first parameter) must match! User Id is auto pulled in. Function will do nothing if user is not logged in when called.
/**
* Craetes a review tied to a user and a beach
* @param beachName Must match beach name exactly (BeachModel.getName())
* @param rating double for how many stars out of 5
* @param message Optional field. Leave empty string if no message. CANNOT BE NULL
* @param isAnonymous True if anonymous. False if displayname should be shown
*/
DatabaseHelper.createReview("beach2", 2.3, "I hate this beach!", false);Delete review. Only works if use rlogged in
/**
* Deletes reviews
* @param reviewID id of review. stored in ReviewModel.getId
* @param beachName name of beach. must match exactly
*/
DatabaseHelper.deleteReview("1667887691369", "beach1");generates uer model object. user model contains hashmap of trips/reviews
FirebaseDatabase root = FirebaseDatabase.getInstance();
root.getReference("users").child(user.getUid()).get().addOnCompleteListener(new OnCompleteListener<DataSnapshot>() {
@Override
public void onComplete(@NonNull Task<DataSnapshot> task) {
if (!task.isSuccessful()) {
Log.e("firebase", "Error getting data", task.getException());
}
else {
//User retrieved
UserModel result = task.getResult().getValue(UserModel.class);
System.out.println(result.getEmail());
}
}
});must be logged in. NEVER CREATE TRIP OBJECT MANUALLY
DatabaseHelper.createTrip("<startTimeAndDat>", DatabaseHelper.generateRouteFromUSC("<destination address>"), "<beachName>", <corresponding parking lot model>);