Obteniendo "java.lang.NullPointerException: No se puede pasar nulo para el argumento 'pathString' en child ()" en Firebase
Imagen de DB en la consola de Firebase
Realmente no sé qué está mal aquí, puedo agregar datos sobre la otra actividad. Recibo el error "java.lang.NullPointerException: no se puede pasar nulo para el argumento 'pathString' en child ()" y no sé cómo solucionarlo. Hay otras 3 clases creadas, solo una es agregar datos al almacenamiento de la base de datos en tiempo real de Firebase.
package com.example.akshay.katiroll.FirstScreen;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.example.akshay.katiroll.R;
import com.example.akshay.katiroll.SecondScreen.welcome;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
public class Profile extends AppCompatActivity {
EditText fName, lName, PhNo, BDay, Zip;
Button svBtn;
DatabaseReference mDataReference;
String keyUser;
String fNameStr, lNameStr, PhNoStr, BDayStr, ZipStr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
keyUser = getIntent().getStringExtra("USER_KEY");
mDataReference = FirebaseDatabase.getInstance().getReference().child("Users").child(keyUser);//error in this line
fName = (EditText) findViewById(R.id.fName);
lName = (EditText) findViewById(R.id.lName);
PhNo = (EditText) findViewById(R.id.phno);
BDay = (EditText) findViewById(R.id.bday);
Zip = (EditText) findViewById(R.id.zip);
svBtn = (Button) findViewById(R.id.svBtn);
svBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
fNameStr = fName.getText().toString();
lNameStr = lName.getText().toString();
PhNoStr = PhNo.getText().toString();
BDayStr = BDay.getText().toString();
ZipStr = Zip.getText().toString();
if(!TextUtils.isEmpty(fNameStr) && !TextUtils.isEmpty(lNameStr) && !TextUtils.isEmpty(PhNoStr)) {
DatabaseReference mDataRef = mDataReference.child("Users").push();
mDataRef.child("firstName").setValue(""+fNameStr);
mDataRef.child("lastName").setValue(""+lNameStr);
mDataRef.child("phoneNumber").setValue(""+PhNoStr);
mDataRef.child("isVerified").setValue("verified");
if(!TextUtils.isEmpty(BDayStr)){
mDataRef.child("birthday").setValue(""+BDayStr);
}else{
mDataRef.child("birthday").setValue("null");
}
if(!TextUtils.isEmpty(ZipStr)){
mDataRef.child("zipcode").setValue("ZipStr");
}else{
mDataRef.child("zipcode").setValue("null");
}
Toast.makeText(Profile.this, "User profile added", Toast.LENGTH_LONG).show();
startActivity(new Intent(Profile.this, welcome.class));
}else{
Toast.makeText(Profile.this, "Failed to create User Account", Toast.LENGTH_LONG).show();
}
}
});
}
}
package com.example.akshay.katiroll.FirstScreen;
import android.content.Intent;
import android.graphics.Color;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.example.akshay.katiroll.R;
import com.example.akshay.katiroll.SecondScreen.welcome;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.Iterator;
public class katiRoll extends AppCompatActivity {
EditText userEdit;
EditText passEdit;
String sUser, sPass;
Button sign;
Button reg;
Boolean signInVLogIn;
FirebaseAuth mAuth;
FirebaseAuth.AuthStateListener mAuthListener;
DatabaseReference mDatabaseRef;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_kati_roll);
float Re = 255;
float Gr = 148;
float Bl = 0;
userEdit = (EditText)findViewById(R.id.user);
passEdit = (EditText)findViewById(R.id.pass);
sign = (Button) findViewById(R.id.sign);
reg = (Button) findViewById(R.id.reg);
userEdit.setTextColor(Color.rgb(Re,Gr,Bl));
passEdit.setTextColor(Color.rgb(Re,Gr,Bl));
sign.setTextColor(Color.rgb(Re,Gr,Bl));
reg.setTextColor(Color.rgb(Re,Gr,Bl));
mAuth = FirebaseAuth.getInstance();
mDatabaseRef = FirebaseDatabase.getInstance().getReference().child("Users");
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if(!TextUtils.isEmpty(sUser) && !TextUtils.isEmpty(sPass)){
signInVLogIn = true;
}else{
signInVLogIn = false;
}
if(user != null && signInVLogIn) {
}else{
//Toast.makeText(katiRoll.this, "Log In Failed", Toast.LENGTH_LONG).show();
}
}
};
sign.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sUser = userEdit.getText().toString().trim();
sPass = passEdit.getText().toString().trim();
if(!TextUtils.isEmpty(sUser) && !TextUtils.isEmpty(sPass))
{
mAuth.signInWithEmailAndPassword(sUser, sPass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
mDatabaseRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
checkUserValidation(dataSnapshot, sUser);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}else{
Toast.makeText(katiRoll.this, "User Login Doesn't Exist" , Toast.LENGTH_LONG).show();
}
}
});
}
}
});
reg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(katiRoll.this, signUp.class));
}
});
}
private void checkUserValidation(DataSnapshot dataSnapshot, String emailForVer) {
Iterator iterator = dataSnapshot.getChildren().iterator();
while (iterator.hasNext())
{
DataSnapshot dataUser = (DataSnapshot)iterator.next();
if (dataUser.child("emailUser").getValue().toString().equals(emailForVer)){
if(dataUser.child("isVerified").getValue().toString().equals("unverified"))
{
Intent in = new Intent(katiRoll.this, Profile.class);
in.putExtra("USER KEY", dataUser.child("userKey").getValue().toString());
startActivity(in);
Log.d("USERKEY",dataUser.child("userKey").getValue().toString());
}
else{
startActivity(new Intent(katiRoll.this, welcome.class));
}
}
}
}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
@Override
protected void onStop() {
super.onStop();
if(mAuthListener !=null){
mAuth.removeAuthStateListener(mAuthListener);
}
}
}
package com.example.akshay.katiroll.FirstScreen;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.InputType;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Toast;
import com.example.akshay.katiroll.SecondScreen.welcome;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.example.akshay.katiroll.R;
import com.google.firebase.database.ValueEventListener;
import java.util.Iterator;
public class signUp extends AppCompatActivity {
EditText nUser, nPass;
Button registerBtn, backToMain;
ImageButton passVis;
FirebaseAuth mAuth;
FirebaseAuth.AuthStateListener mAuthListener;
DatabaseReference mDatabaseRef, mUserCheckData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_up);
nUser = (EditText) findViewById(R.id.nUser);
nPass = (EditText) findViewById(R.id.nPass);
registerBtn = (Button) findViewById(R.id.registerBtn);
backToMain = (Button) findViewById(R.id.backToMain);
passVis = (ImageButton)findViewById(R.id.passVis);
passVis.setImageResource(R.drawable.open);
passVis.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Drawable drawable = passVis.getDrawable();
if(drawable.getConstantState().equals(getResources().getDrawable(R.drawable.open,null).getConstantState())){
passVis.setImageResource(R.drawable.closed);
nPass.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
}else{
passVis.setImageResource(R.drawable.open);
nPass.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_WEB_PASSWORD);
}
}
});
float Re = 255;
float Gr = 148;
float Bl = 0;
nUser.setTextColor(Color.rgb(Re, Gr, Bl));
nPass.setTextColor(Color.rgb(Re, Gr, Bl));
registerBtn.setTextColor(Color.rgb(Re, Gr, Bl));
backToMain.setTextColor(Color.rgb(Re, Gr, Bl));
mAuth = FirebaseAuth.getInstance();
mDatabaseRef = FirebaseDatabase.getInstance().getReference();
mUserCheckData = FirebaseDatabase.getInstance().getReference().child("User");
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
final String emailForVer = user.getEmail();
mUserCheckData.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
checkForValidation(dataSnapshot, emailForVer);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
} else {
Log.d("TAG", "onAuthStateChanged:signed_out");
}
}
};
registerBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
final String nUserString, nPassString;
nUserString = (nUser.getText().toString().trim());
nPassString = (nPass.getText().toString().trim());
if(nPassString.length()>=6){
if (!TextUtils.isEmpty(nUserString) && !TextUtils.isEmpty(nPassString)) {
mAuth.createUserWithEmailAndPassword(nUserString, nPassString).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
DatabaseReference mChildDatabase = mDatabaseRef.child("Users").push();
String key_user = mChildDatabase.getKey();
mChildDatabase.child("isVerified").setValue("unverified");
mChildDatabase.child("userKey").setValue(key_user);
mChildDatabase.child("EmailUser").setValue(nUserString);
mChildDatabase.child("PasswordUser").setValue(nPassString);
Toast.makeText(signUp.this, "User Account Created, Check Email For Confirmation", Toast.LENGTH_LONG).show();
FirebaseUser user = mAuth.getCurrentUser();
if (user != null) {
user.sendEmailVerification();
}
startActivity(new Intent(signUp.this, Profile.class));
} else {
Toast.makeText(signUp.this, "Failed to create User Account", Toast.LENGTH_LONG).show();
}
}
});
} else {
Toast.makeText(signUp.this, "Failed to create User Account", Toast.LENGTH_LONG).show();
}
}else {
Toast.makeText(signUp.this, "Failed to create User Account", Toast.LENGTH_LONG).show();
}
}
});
backToMain.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(signUp.this, katiRoll.class));
}
});
}
private void checkForValidation(DataSnapshot dataSnapshot, String emailForVer) {
Iterator iterator = dataSnapshot.getChildren().iterator();
while (iterator.hasNext())
{
DataSnapshot dataUser = (DataSnapshot)iterator.next();
if (dataUser.child("emailUser").getValue().toString().equals(emailForVer)){
if(dataUser.child("isVerified").getValue().toString().equals("unverified"))
{
Intent in = new Intent(signUp.this, Profile.class);
in.putExtra("USER KEY", dataUser.child("userKey").getValue().toString());
startActivity(in);
Log.d("USERKEY",dataUser.child("userKey").getValue().toString());
}
else{
startActivity(new Intent(signUp.this, welcome.class));
}
}
}
}
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
@Override
protected void onStop() {
super.onStop();
if(mAuthListener !=null){
mAuth.removeAuthStateListener(mAuthListener);
}
}
}
package com.example.akshay.katiroll.SecondScreen;
import android.content.Intent;
import android.graphics.Color;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import com.example.akshay.katiroll.FirstScreen.katiRoll;
import com.example.akshay.katiroll.R;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
public class welcome extends AppCompatActivity {
Button logOutBtn;
FirebaseAuth mAuth;
FirebaseAuth.AuthStateListener mAuthListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
float Re = 255;
float Gr = 148;
float Bl = 0;
logOutBtn = (Button)findViewById(R.id.logOutBtn);
logOutBtn.setTextColor(Color.rgb(Re,Gr,Bl));
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if(user !=null) {
}else{
}
}
};
logOutBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mAuth.signOut();
finish();
startActivity(new Intent(welcome.this, katiRoll.class));
}
});
}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
@Override
protected void onStop() {
super.onStop();
mAuth.removeAuthStateListener(mAuthListener);
}
}