Xtykutl

How can I put Firabase Database code into my Frebase auth code? so that the data will only save into the database if there are no errors or onComplete.

Firebase database code:

if (!nameStr.isEmpty()) {

                String ID = GDatabase.push().getKey();



                Accounts accounts = new Accounts(ID, nameStr, genderStr, emailStr, passwordStr);



                GDatabase.child(ID).setValue(accounts);





            } else {

                Toast.makeText(MainActivity.this, "Unable to save data into the database", Toast.LENGTH_SHORT).show();

            }

Firebase auth code:

 firebaseAuth.createUserWithEmailAndPassword(emailStr, passwordStr)

                    .addOnCompleteListener(new OnCompleteListener<AuthResult>() {

                        @Override

                        public void onComplete(@NonNull Task<AuthResult> task) {

                            progressBar.setVisibility(View.GONE);

                            if (task.isSuccessful()) {

                                firebaseAuth.getCurrentUser().sendEmailVerification()

                                        .addOnCompleteListener(new OnCompleteListener<Void>() {

                                            @Override

                                            public void onComplete(@NonNull Task<Void> task) {

                                                if (task.isSuccessful()) {

                                                    Toast.makeText(MainActivity.this, "Registered successfully. Please check your email for verification",

                                                            Toast.LENGTH_LONG).show();

                                                    email.setText("");

                                                    password.setText("");



                                                } else {

                                                    Toast.makeText(MainActivity.this, task.getException().getMessage(),

                                                            Toast.LENGTH_LONG).show();

                                                }

                                            }

                                        });



                            }

                        }

                    });

All of my code from that class:

public class MainActivity extends AppCompatActivity {

boolean connected = false;



private String blockCharacterSet = "~#^|$%&*!+-*/=.,{};'<>?`()_૱꠸┯┰┱┲❗►◄Ăă0123456789ǕǖꞀ¤Ð¢℥Ω℧" +

        "Kℶℷℸⅇ⅊⚌⚍⚎⚏⚭⚮⌀⏑⏒⏓⏔⏕⏖⏗⏘⏙⏠⏡⏦ᶀᶁᶂᶃᶄᶆᶇᶈᶉᶊᶋᶌᶍᶎᶏᶐᶑᶒᶓᶔᶕᶖᶗᶘᶙᶚᶸᵯᵰᵴᵶᵹᵼᵽᵾᵿ u200Cu200Du200Eu200F ⁁⁊" +

        "u206Au206Bu206Cu206Du206Eu206F⸜⸝¶¥£⅕⅙⅛⅔⅖⅗⅘⅜⅚⅐⅝↉⅓⅑⅒⅞←↑→↓↔↕↖↗↘↙↚↛↜↝↞↟↠↡↢↣↤↥↦↧↨↩↪" +

        "↫↬↭↮↯↰↱↲↳↴↵↶↷↸↹↺↻↼↽↾↿⇀⇁⇂⇃⇄⇅⇆⇇⇈⇉⇊⇋⇌⇍⇎⇏⇐⇑⇒⇓⇔⇕⇖⇗⇘⇙⇚⇛⇜⇝⇞⇟⇠⇡⇢⇣⇤⇥⇦⇨⇩⇪⇧⇫⇬⇭⇮⇯⇰" +

        "⇱⇲⇳⇴⇵⇶⇷⇸⇹⇺⇻⇼⇽⇾⇿⟰⟱⟲⟳⟴⟵⟶⟷⟸⟹⟺⟻⟼⟽⟾⟿⤀⤁⤂⤃⤄⤅⤆⤇⤈⤉⤊⤋⤌⤍⤎⤏⤐⤑⤒⤓⤔⤕⤖⤗" +

        "⤘⤙⤚⤛⤜⤝⤞⤟⤠⤡⤢⤣⤤⤥⤦⤧⤨⤩⤪⤫⤬⤭⤮⤯⤰⤱⤲⤳⤴⤵⤶⤷⤸⤹⤺⤻⤼⤽⤾⤿⥀⥁⥂⥃⥄⥅⥆⥇⥈⥉⥊⥋⥌⥍⥎⥏⥐⥑⥒⥓⥔⥕⥖⥗⥘⥙⥚⥛⥜⥝⥞⥟" +

        "⥠⥡⥢⥣⥤⥥⥦⥧⥨⥩⥪⥫⥬⥭⥮⥯⥰⥱⥲⥳⥴⥵⥶⥷⥸⥹⥺⥻⥼⥽⥾⥿➔➘➙➚➛➜➝➞➝➞➟➠➡➢➣➤➥➦➧➨➩➩➪➫➬➭➮➯➱➲➳" +

        "➴➵➶➷➸➹➺➻➼➽➾⬀⬁⬂⬃⬄⬅⬆⬇⬈⬉⬊⬋⬌⬍⬎⬏⬐⬑☇☈⏎⍃⍄⍅⍆⍇⍈⍐⍗⍌⍓⍍⍔⍏⍖♾⎌☊☋☌☍⌃⌄⌤⌅⌆⌇⚋⚊⌌⌍⌎⌏⌐⌑⌔⌕⌗" +

        "⌙⌢⌣⌯⌬⌭⌮⌖⌰⌱⌲⌳⌴⌵⌶⌷⌸⌹⌺⌻⌼⍯⍰⌽⌾⌿⍀⍁⍂⍉⍊⍋⍎⍏⍑⍒⍕⍖⍘⍙⍚⍛⍜⍝⍞⍠⍟⍡⍢⍣⍤⍥⍨⍩⍦⍧⍬⍿⍪⍮⍫⍱⍲⍭⍳⍴⍵⍶⍷⍸⍹⍺⍼⍽⍾⎀⎁⎂⎃" +

        "⎄⎅⎆⎉⎊⎋⎍⎎⎏⎐⎑⎒⎓⎔⎕⏣⌓⏥⏢⎖⎲⎳⎴⎵⎶⎸⎹⎺⎻⎼⎽⎾⎿⏀⏁⏂⏃⏄⏅⏆⏇⏈⏉⏉⏋⏌⏍⏐⏤⏚⏛Ⓝℰⓦ!   ⌘«»‹›‘’“”„‚❝❞£¥€$" +

        "¢¬¶@§®©™°×π±√‰Ω∞≈÷~≠¹²³½¼¾‐–—|⁄\{}†‡…·•●uF8FF⌥⌃⇧↩¡¿‽⁂∴∵◊※←→↑↓☜☞☝☟✔★☆♺☼☂☺☹☃✉✿✄" +

        "✈✌✎♠♦♣♥♪♫♯♀♂αßÁáÀàÅåÄäÆæÇçÉéÈèÊêÍíÌìÎîÑñÓóÒòÔôÖöØøÚúÙùÜüŽž₳฿￠€₡¢₢₵₫￡£₤₣ƒ₲₭₥₦₱＄$₮₩￦¥￥₴₰¤៛₪" +

        "₯₠₧₨௹﷼㍐৲৳~ƻƼƽ¹¸¬¨ɂǁ¯Ɂǂ¡´°ꟾ¦}{|.,·])[/_\¿º§"*-+(!&%$¼¾½¶©®@ẟⱿ`Ȿ^꜠꜡ỻ'=:;<ꞌꞋ꞊ꞁꞈ꞉>?÷ℾℿ℔℩℉⅀℈þ" +

        "ðÞµªꝋꜿꜾⱽⱺⱹⱷⱶⱵⱴⱱⱰⱦȶȴȣȢȡȝȜțȋȊȉȈǯǮǃǀƿƾƺƹƸƷƲưƪƣƢƟƛƖƕƍſỽ⸀⸁⸂⸃⸄⸅⸆⸇⸈⸉⸊⸋⸌⸍⸎⸏⸐⸑⸒⸔⸕▲▼◀▶◢◣◥◤△▽◿◺◹◸▴▾◂▸" +

        "▵▿◃▹◁▷◅▻◬⟁⧋⧊⊿∆∇◭◮⧩⧨⌔⟐◇◆◈⬖⬗⬘⬙⬠⬡⎔⋄◊⧫⬢⬣▰▪◼▮◾▗▖■∎▃▄▅▆▇█▌▐▍▎▉▊▋❘❙❚▀▘▝▙▚" +

        "▛▜▟▞░▒▓▂▁▬▔▫▯▭▱◽□◻▢⊞⊡⊟⊠▣▤▥▦⬚▧▨▩⬓◧⬒◨◩◪⬔⬕❏❐❑❒⧈◰◱◳◲◫⧇⧅⧄⍁⍂⟡⧉○◌◍◎◯❍◉" +

        "⦾⊙⦿⊜⊖⊘⊚⊛⊝●⚫⦁◐◑◒◓◔◕⦶⦸◵◴◶◷⊕⊗⦇⦈⦉⦊❨❩⸨⸩◖◗❪❫❮❯❬❭❰❱⊏⊐⊑⊒◘◙◚◛◜◝◞◟◠◡⋒⋓⋐⋑╰╮╭╯⌒╳✕╱╲⧸⧹⌓◦❖✖✚✜⧓" +

        "⧗⧑⧒⧖_⚊╴╼╾‐⁃‑‒-–⎯—―╶╺╸─━┄┅┈┉╌╍═≣≡☰☱☲☳☴☵☶☷╵╷╹╻│▕▏┃┆┇┊╎┋╿╽┌┍┎┏┐┑┒┓└┕┖┗┘┙┚┛├┝┞┟┠┡┢┣┤┥┦┧┨┩┪┫┬┭┮┳┴┵┶┷┸┹┺" +

        "┻┼┽┾┿╀╁╂╃╄╅╆╇╈╉╊╋╏║╔╒╓╕╖╗╚╘╙╛╜╝╞╟╠╡╢╣╤╥╦╧╨╩╪╫╬⌞⌟⌜⌝⌊⌋⌉⌈⌋₯ἀἁἂἃἄἅἆἇἈἉἊἋἌἍἎἏἐἑἒἓἔἕἘἙἚἛἜἝἠἡἢἣἤἥἦἧἨἩἪἫἬ" +

        "ἭἮἯἰἱἲἳἴἵἶἷἸἹἺἻἼἽἾἿὀὁὂὃὄὅὈὉὊὋὌὍὐὑὒὓὔὕὖὗὙὛὝὟὠὡὢὣὤὥὦὧὨὩὪὫὬὭὮὯὰάὲέὴήὶίὸόὺύὼώᾀᾁᾂᾃᾄᾅᾆᾇᾈᾉᾊᾋᾌᾍᾎᾏᾐᾑ" +

        "ᾒᾓᾔᾕᾖᾗᾘᾙᾚᾛᾜᾝᾞᾟᾠᾡᾢᾣᾤᾥᾦᾧᾨᾩᾪᾫᾬᾭᾮᾯᾰᾱᾲᾳᾴᾶᾷᾸᾹᾺΆᾼ᾽ι᾿῀῁ῂῃῄῆῇῈΈῊΉῌ῍῎῏ῐῑῒΐῖῗῘῙῚΊ῝῞῟ῠῡῢΰῤῥῦῧῨῩῪΎῬ῭΅" +

        "`ῲῳῴῶῷῸΌῺΏῼ´῾ͰͱͲͳ ʹ͵Ͷͷͺͻͼͽ;΄΅Ά·ΈΉΊΌΎΏΐΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩΪΫάέήίΰαβγδεζηθικλμνξοπρςστυφχ" +

        "ψωϊϋόύώϐϑϒϓϔϕϖϗϘϙϚϛϜϝϞϟϠϡϢϣϤϥϦϧϨϩϪϫϬϭϮϯϰϱϲϳϴϵ϶ϷϸϹϺϻϼϽϾϿⒶⓐ⒜ẠạẢảḀḁÂÃǍǎẤấẦầẨẩȂȃẪẫẬậÀÁẮắẰằẲẳẴẵẶặ" +

        "ĀāĄąǞȀȁÅǺǻÄäǟǠǡâáåãàẚȦȧȺÅⱥÆæǼǢǣⱯꜲꜳꜸꜺⱭꜹꜻª℀⅍℁Ⓑⓑ⒝ḂḃḄḅḆḇƁɃƀƃƂℬⒸⓒ⒞ḈḉĆćĈĉĊċČčÇçƇƈȻȼℂ℃ℭƆ℅" +

        "℆℄ꜾꜿⒹⓓ⒟ḊḋḌḍḎḏḐḑḒḓĎďƊƋƌƉĐđȡⅅⅆDZDzdzDŽDždžȸⒺⓔ⒠ḔḕḖḗḘḙḚḛḜḝẸẹẺẻẾếẼẽỀềỂểỄễỆệĒēĔĕĖėĘęĚěÈèÉéÊêËëȄȅȨȩȆȇƎ" +

        "ⱸɆℇℯ℮ƐℰƏǝⱻɇⒻⓕ⒡ḞḟƑƒꜰℲⅎꟻℱ℻Ⓖⓖ⒢ḠḡĜĝĞğĠġĢģǤǥǦǧǴℊ⅁ǵⒽⓗ⒣ḢḣḤḥḦḧḨḩḪḫẖĤĥȞȟĦħⱧⱨꜦℍǶℏℎℋℌꜧⒾⓘ⒤ḬḭḮḯIJij" +

        "ìíîïÌÍÎÏĨĩĪīĬĭĮįıƗƚỺǏǐⅈⅉℹℑℐⒿⓙ⒥ĴĵȷⱼɈɉǰⓀⓚ⒦ḰḱḲḳḴḵĶķƘƙꝀꝁꝂꝃꝄꝅǨǩⱩⱪĸⓁⓛ⒧ḶḷḸḹḺḻḼḽĹĺĻļĽİľĿŀŁłỈỉỊịȽⱠꝈꝉⱡⱢꞁℒLJLj" +

        "lj⅃⅂ℓȉȈȊȋⓂⓜ⒨ḾḿṀṁṂṃꟿꟽⱮƩƜℳⓃⓝ⒩ṄṅṆṇṈṉṊṋŃńŅņŇňǸǹŊƝñʼnÑȠƞŋNJNjnjȵℕ№ṌṍṎṏṐṑṒṓȪȫȬȭȮȯȰȱǪǫǬǭỌọỎỏỐốỒồ" +

        "ỔổỖỗỘộỚớỜờỞởỠỡỢợƠơŌōŎŏŐőÒÓÔÕÖǑȌȍȎȏŒœØǾꝊǽǿℴ⍥⍤Ⓞⓞ⒪òóôõöǒøꝎꝏⓅⓟ⒫℗ṔṕṖṗƤƥⱣℙǷꟼ℘Ⓠⓠ⒬Ɋɋℚ℺ȹⓇⓡ⒭ŔŕŖ" +

        "ŗŘřṘṙṚṛṜṝṞṟȐȑȒȓɍɌƦⱤ℞Ꝛꝛℜℛ℟ℝⓈⓢ⒮ṠṡṢṣṤṥṦṧṨṩŚśŜŝŞşŠšȘșȿꜱƧƨẞßẛẜẝ℠Ⓣⓣ⒯ṪṫṬṭṮṯṰṱŢţŤťŦŧƬƮẗȚȾƫƭțⱦȶ℡™Ⓤⓤ⒰ṲṳṴṵṶ" +

        "ṸṹṺṻỤỦủỨỪụứỬửừữỮỰựŨũŪūŬŭŮůŰűǙǚǗǘǛǜŲųǓǔȔȕÛûȖȗÙùÜüƯúɄưƲƱⓋⓥ⒱ṼṽṾṿỼɅ℣ⱱⱴⱽⓌⓦ⒲ẀẁẂẃẄẅẆẇẈẉŴŵẘⱲⱳⓍⓧ" +

        "⒳ẊẋẌẍℵ×Ⓨⓨ⒴ẎẏỾỿẙỲỳỴỵỶỷỸỹŶŷƳƴŸÿÝýɎɏȲƔ⅄ȳℽⓏⓩ⒵ẐẑẒẓẔẕŹźŻżŽžȤȥⱫⱬƵƶɀℨℤ⟀⟁⟂⟃⟄⟇⟈⟉⟊⟐⟑⟒⟓⟔⟕⟖⟗⟘⟙⟚⟛⟜" +

        "⟝⟞⟟⟠⟡⟢⟣⟤⟥⟦⟧⟨⟩⟪⟫⦀⦁⦂⦃⦄⦅⦆⦇⦈⦉⦊⦋⦌⦍⦎⦏⦐⦑⦒⦓⦔⦕⦖⦗⦘⦙⦚⦛⦜⦝⦞⦟⦠⦡⦢⦣⦤⦥⦦⦧⦨⦩⦪⦫⦬⦭⦮⦯⦰⦱⦲⦳⦴⦵⦶⦷⦸⦹⦺⦻⦼⦽⦾⦿⧀⧁⧂⧃⧄⧅⧆⧇⧈⧉⧊⧋" +

        "⧌⧍⧎⧏⧐⧑⧒⧓⧔⧕⧖⧗⧘⧙⧚⧛⧜⧝⧞⧟⧡⧢⧣⧤⧥⧦⧧⧨⧩⧪⧫⧬⧭⧮⧯⧰⧱⧲⧳⧴⧵⧶⧷⧸⧹⧺⧻⧼⧽⧾⧿∀∁∂∃∄∅∆∇∈∉∊∋∌∍∎∏∐∑−∓∔∕∖∗∘∙√∛" +

        "∜∝∞∟∠∡∢∣∤∥∦∧∨∩∪∫∬∭∮∯∰∱∲∳∴∵∶∷∸∹∺∻∼∽∾∿≀≁≂≃≄≅≆≇≈≉≊≋≌≍≎≏≐≑≒≓≔≕≖≗≘≙≚≛≜≝≞≟≠≡≢≣≤≥≦≧≨≩≪≫≬≭≮≯" +

        "≰≱≲≳≴≵≶≷≸≹≺≻≼≽≾≿⊀⊁⊂⊃⊄⊅⊆⊇⊈⊉⊊⊋⊌⊍⊎⊏⊐⊑⊒⊓⊔⊕⊖⊗⊘⊙⊚⊛⊜⊝⊞⊟⊠⊡⊢⊣⊤⊥⊦⊧⊨⊩⊪⊫⊬⊭⊮⊯⊰⊱⊲⊳⊴⊵⊶⊷⊸⊹⊺⊻" +

        "⊼⊽⊾⊿⋀⋁⋂⋃⋄⋅⋆⋇⋈⋉⋊⋋⋌⋍⋎⋏⋐⋑⋒⋓⋔⋕⋖⋗⋘⋙⋚⋛⋜⋝⋞⋟⋠⋡⋢⋣⋤⋥⋦⋧⋨⋩⋪⋫⋬⋭⋮⋯⋰⋱⋲⋳⋴⋵⋶⋷⋸⋹⋺⋻⋼⋽⋾⋿✕✖✚◀▶❝❞uF8FF" +

        "★☆☼☂☺☹✄✈✌✎♪♫☀☁☔⚡❆☽☾✆✔☯☮☠⚑☬✄✏♰✡✰✺⚢⚣♕♛♚♬ⓐⓑⓒⓓ↺↻⇖⇗⇘⇙⟵⟷⟶⤴⤵⤶⤷➫➬€₤＄₩₪⟁⟐◆⎔░▢⊡▩" +

        "⟡◎◵⊗❖ΩβΦΣΞ⟁⦻⧉⧭⧴∞≌⊕⋍⋰⋱✖⓵⓶⓷⓸⓹⓺⓻⓼⓽⓾ᴕ⸨⸩❪❫⓵⓶⓷⓸⓹⓺⓻⓼⓽⓾⒈⒉⒊⒋⒌⒍⒎⒏⒐⒑⒒⒓⒔⒕⒖⒗⒘⒙⒚⒛⓪①②③④" +

        "⑤⑥⑦⑧⑨⑩➀➁➂➃➄➅➆➇➈➉⑪⑫⑬⑭⑮⑯⑰⑱⑲⑳⓿❶❷❸❹❺❻❼❽❾❿➊➋➌➍➎➏➐➑➒➓⓫⓬⓭⓮⓯⓰⓱⓲⓳⓴⑴⑵⑶⑷⑸⑹⑺⑻⑼⑽⑾⑿⒀" +

        "⒁⒂⒃⒄⒅⒆⒇ᶅᶛᶜᶝᶞᶟᶠᶡᶢᶣᶤᶥᶦᶧᶨᶩᶪᶫᶬᶭᶮᶯᶰᶱᶲᶳᶴᶵᶶᶷᶹᶺᶻᶼᶽᶾᶿᴀᴁᴂᴃᴄᴅᴆᴇᴈᴉᴊᴋᴌᴍᴎᴏᴐᴑᴒᴓᴔᴕᴖᴗᴘᴙᴚᴛᴜᴝᴞᴟᴠᴡᴢᴣᴤᴥᴦᴧᴨᴩᴪᴫᴬᴭᴮᴯᴰᴱᴲᴳᴴᴵᴶᴷᴸᴹᴺᴻᴼᴽᴾᴿᵀᵁᵂᵃᵄᵅᵆᵇᵈᵉᵊᵋᵌᵍᵎᵏᵐᵑᵒᵓᵔᵕᵖᵗᵘᵙᵚᵛᵜᵝᵞᵟᵠᵡᵢᵣᵤᵥᵦᵧ" +

        "ᵨᵩᵪᵫᵬᵭᵮᵱᵲᵳᵵᵷᵸᵺᵻ ᷋ ᷌ ᷍ ᷎ ᷏ᷓᷔᷕᷖᷗᷘᷙᷛᷜᷝᷞᷟᷠᷡᷢᷣᷤᷥᷦ‘’‛‚“”„‟«»‹›Ꞌ"❛❜❝❞<>@‧¨․꞉:⁚⁝⁞‥…⁖⸪⸬⸫⸭⁛⁘⁙⁏;⦂⁃‐‑‒-–⎯—―_⁓⸛⸞⸟ⸯ¬/" +

        "\⁄\⁄|⎜¦‖‗†‡·•⸰°‣⁒%‰‱&⅋§÷+±=꞊′″‴⁗‵‶‷‸*⁑⁎⁕※⁜⁂!‼¡?¿⸮⁇⁉⁈‽⸘¼½¾²³©®™℠℻℅℁⅍℄¶⁋❡⁌⁍⸖⸗⸚⸓(){}⸨⸩❨❩❪❫⸦⸧❬❭❮❯❰❱❴❵❲❳⦗⦘⁅⁆" +

        "〈〉⏜⏝⏞⏟⸡⸠⸢⸣⸤⸥⎡⎤⎣⎦⎨⎬⌠⌡⎛⎠⎝⎞⁀⁔‿⁐‾⎟⎢⎥⎪ꞁ⎮⎧⎫⎩⎭⎰⎱✈☀☼☁☂☔⚡❄❅❆☃☉☄★☆☽☾⌛⌚☇☈⌂⌁✆☎☏☑✓✔⎷⍻✖✗✘☒✕☓☕♿✌☚☛☜☝☞☟☹☺☻☯⚘☮✝⚰⚱⚠" +

        "☠☢⚔⚓⎈⚒⚑⚐☡❂⚕⚖⚗✇☣⚙☤⚚⚛⚜☥☦☧☨☩†☪☫☬☭✁✂✃✄✍✎✏✐uF802✑✒✉✙✚✜✛♰♱✞✟✠✡☸✢✣✤✥✦✧✩✪✫✬✭✮✯✰✲✱✳" +

        "✴✵✶✷✸✹✺✻✼✽✾❀✿❁❃❇❈❉❊❋⁕☘❦❧☙❢❣♀♂⚢⚣⚤⚦⚧⚨⚩☿♁⚯♔♕♖♗♘♙♚♛♜♝♞♟☖☗♠♣♦♥❤❥♡♢♤♧⚀⚁⚂⚃⚄⚅⚇⚆⚈⚉" +

        "♨♩♪♫♬♭♮♯uF8FF⌨⏏⎗⎘⎙⎚⌥⎇⌘⌦⌫⌧♲♳♴♵♶♷♸♹♺♻♼♽⁌⁍⎌⌇⌲⍝⍟⍣⍤⍥⍨⍩⎋♃♄♅♆♇♈♉♊♋♌♍♎♏♐♑♒♓⏚⏛";



EditText email;

Toolbar toolbar;

ProgressBar progressBar;

EditText fname, Mname, Lname;

EditText password;

Button signup;

Button login;

Button forgotPass;

Spinner spinGender;



FirebaseAuth firebaseAuth;

DatabaseReference GDatabase;





private InputFilter filter = new InputFilter() {



    @Override

    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {



        if (source != null && blockCharacterSet.contains(("" + source))) {

            return "";

        }

        return null;

    }

};





@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    GDatabase = FirebaseDatabase.getInstance().getReference("Accounts");



    toolbar = findViewById(R.id.toolbar);

    progressBar = findViewById(R.id.progressBar);



    fname = findViewById(R.id.etFirstName);

    fname.setFilters(new InputFilter{new InputFilter.AllCaps(), new InputFilter.LengthFilter(10), filter});



    Mname = findViewById(R.id.etMid);

    Mname.setFilters(new InputFilter{new InputFilter.AllCaps(), new InputFilter.LengthFilter(2), filter});



    Lname = findViewById(R.id.etLastName);

    Lname.setFilters(new InputFilter{new InputFilter.AllCaps(), new InputFilter.LengthFilter(12), filter});



    email = findViewById(R.id.etEmail);

    password = findViewById(R.id.etPassword);



    spinGender = findViewById(R.id.spinnerGender);

    signup = findViewById(R.id.btnSignup);

    login = findViewById(R.id.btnLogin);

    forgotPass = findViewById(R.id.btnUserForgotPass);



    toolbar.setTitle(R.string.app_name);



    firebaseAuth = FirebaseAuth.getInstance();



    signup.setOnClickListener(new View.OnClickListener() {



        @Override

        public void onClick(View view) {

            progressBar.setVisibility(View.VISIBLE);

            String emailStr = email.getText().toString();

            String passwordStr = password.getText().toString();

            String FirstN = fname.getText().toString();

            String MiddleN = Mname.getText().toString();

            String LastN = Lname.getText().toString();

            String nameStr = FirstN + " " + MiddleN + " " + LastN;

            String genderStr = spinGender.getSelectedItem().toString();





            if (FirstN == null || FirstN.isEmpty()) {

                Toast.makeText(MainActivity.this, "First Name must not be empty", Toast.LENGTH_SHORT).show();

                return;

            }



            if (MiddleN == null || MiddleN.isEmpty()) {

                Toast.makeText(MainActivity.this, "Middle Name must not be empty", Toast.LENGTH_SHORT).show();

                return;

            }

            if (LastN == null || LastN.isEmpty()) {

                Toast.makeText(MainActivity.this, "Last Name must not be empty", Toast.LENGTH_SHORT).show();

                return;

            }



            if (emailStr == null || emailStr.isEmpty()) {

                Toast.makeText(MainActivity.this, "Email must not be empty", Toast.LENGTH_SHORT).show();



            } else if (!isEmailValid(emailStr)) {

                Toast.makeText(MainActivity.this, "Not a valid email address", Toast.LENGTH_SHORT).show();

                return;

            }

            if (passwordStr == null || passwordStr.isEmpty()) {

                Toast.makeText(MainActivity.this, "Password must not be empty", Toast.LENGTH_SHORT).show();

                return;

            }



            if (!nameStr.isEmpty()) {

                String ID = GDatabase.push().getKey();



                Accounts accounts = new Accounts(ID, nameStr, genderStr, emailStr, passwordStr);



                GDatabase.child(ID).setValue(accounts);





            } else {

                Toast.makeText(MainActivity.this, "Unable to save data into the database", Toast.LENGTH_SHORT).show();

            }

            firebaseAuth.createUserWithEmailAndPassword(emailStr, passwordStr)

                    .addOnCompleteListener(new OnCompleteListener<AuthResult>() {

                        @Override

                        public void onComplete(@NonNull Task<AuthResult> task) {

                            progressBar.setVisibility(View.GONE);

                            if (task.isSuccessful()) {

                                firebaseAuth.getCurrentUser().sendEmailVerification()

                                        .addOnCompleteListener(new OnCompleteListener<Void>() {

                                            @Override

                                            public void onComplete(@NonNull Task<Void> task) {

                                                if (task.isSuccessful()) {

                                                    Toast.makeText(MainActivity.this, "Registered successfully. Please check your email for verification",

                                                            Toast.LENGTH_LONG).show();

                                                    email.setText("");

                                                    password.setText("");



                                                } else {

                                                    Toast.makeText(MainActivity.this, task.getException().getMessage(),

                                                            Toast.LENGTH_LONG).show();

                                                }

                                            }

                                        });



                            }

                        }

                    });





        }

    });





    login.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View view) {

            startActivity(new Intent(MainActivity.this, LoginActivity.class));

        }

    });



    forgotPass.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View view) {

            startActivity(new Intent(MainActivity.this, ForgotPasswordActivity.class));

        }

    });



}



public static boolean isEmailValid(String email) {

    String expression = "^[\w\.-]+@([\w\-]+\.)+[A-Z]{2,4}$";

    Pattern pattern = Pattern.compile(expression, Pattern.CASE_INSENSITIVE);

    Matcher matcher = pattern.matcher(email);

    return matcher.matches();

}



}