Reputation: 41
issues connecting with the firebase database (app keeps crashing whenever i attempt to save to the database)
so i am making a diary application where users log in and then start writing on a diary app that anyone who has the application can access , the application was working fine but after integrating a second layout (the login layout) and the firebase authentication, the application crashes whenever i try to save or view anything from the database. moreover nothing seems to be saved in the database
the second issue is that i would like the userId under which the notes will be saved to be the email the user entered when signing up not the key that firebase can generate
I have tried checking both build gradles and they seem to be working just fine, i also tried just setting the user ID to be 123 to make sure it isn't null i also tried different versions of android to test it but nothing seems to be working
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference mDatabase = database.getReference("diary");
saveBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String diaryTitle = titleText.getText().toString();
String diaryContent = diaryText.getText().toString();
if(diaryTitle.length()==0||diaryContent.length()==0)
{
Toast.makeText(getApplication().getBaseContext(), "FIELD(S) CANNOT BE EMPTY", Toast.LENGTH_SHORT).show();
}
else {
String userId = "123";
diaryclass userDiary = new diaryclass(diaryTitle, diaryContent);
mDatabase.child(userId).setValue(userDiary);
titleText.setText("");
diaryText.setText("");
Toast.makeText(getApplication().getBaseContext(), "text saved", Toast.LENGTH_SHORT).show();
}
}
});
and below the the class that has the diaryclass constructor
public class diaryclass extends diary{
public String Title;
public String Diary;
public diaryclass(){
}
public diaryclass(String Title,String Diary){
this.Title=Title;
this.Diary=Diary;
}
}
this is what the data base looked like before when it worked
please feel free to ask any questions as i would appreciate any kind of help below is a link to the entire project if that would help click here for the android studio project in zip format
for those intrested in the entire code
package ir.mhkz.loginandsignup;
import android.content.Intent;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
public class MainActivity extends AppCompatActivity {
EditText password, reg_password,
reg_email, reg_confirmemail;
Button login, signUp, reg_register;
TextInputLayout txtInLayoutUsername, txtInLayoutPassword, txtInLayoutRegPassword;
CheckBox rememberMe;
private FirebaseAuth mAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
reg_email = findViewById(R.id.username);
password = findViewById(R.id.password);
login = findViewById(R.id.login);
signUp = findViewById(R.id.signUp);
txtInLayoutUsername = findViewById(R.id.txtInLayoutUsername);
txtInLayoutPassword = findViewById(R.id.txtInLayoutPassword);
rememberMe = findViewById(R.id.rememberMe);
mAuth = FirebaseAuth.getInstance();
ClickLogin();
//SignUp's Button for showing registration page
signUp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ClickSignUp();
}
});
}
//This is method for doing operation of check login
private void ClickLogin() {
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (reg_email.getText().toString().trim().isEmpty()) {
Snackbar snackbar = Snackbar.make(view, "Please fill out these fields",
Snackbar.LENGTH_LONG);
View snackbarView = snackbar.getView();
snackbarView.setBackgroundColor(getResources().getColor(R.color.red));
snackbar.show();
txtInLayoutUsername.setError("Username should not be empty");
} else {
//Here you can write the codes for checking username
}
if (password.getText().toString().trim().isEmpty()) {
Snackbar snackbar = Snackbar.make(view, "Please fill out these fields",
Snackbar.LENGTH_LONG);
View snackbarView = snackbar.getView();
snackbarView.setBackgroundColor(getResources().getColor(R.color.red));
snackbar.show();
txtInLayoutPassword.setError("Password should not be empty");
} else {
//Here you can write the codes for checking password
}
if (rememberMe.isChecked()) {
//Here you can write the codes if box is checked
} else {
//Here you can write the codes if box is not checked
}
mAuth.signInWithEmailAndPassword(reg_email.getText().toString(),password.getText().toString());
}
});
}
//The method for opening the registration page and another processes or checks for registering
private void ClickSignUp() {
final Intent intent;
intent = new Intent(this,diary.class);
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
View dialogView = inflater.inflate(R.layout.register, null);
dialog.setView(dialogView);
reg_password = dialogView.findViewById(R.id.reg_password);
reg_email = dialogView.findViewById(R.id.reg_email);
reg_confirmemail = dialogView.findViewById(R.id.reg_confirmemail);
reg_register = dialogView.findViewById(R.id.reg_register);
txtInLayoutRegPassword = dialogView.findViewById(R.id.txtInLayoutRegPassword);
reg_register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (reg_password.getText().toString().trim().isEmpty()) {
txtInLayoutRegPassword.setPasswordVisibilityToggleEnabled(false);
reg_password.setError("Please fill out this field");
} else {
txtInLayoutRegPassword.setPasswordVisibilityToggleEnabled(true);
startActivity(intent);
}
if (reg_email.getText().toString().trim().isEmpty()) {
reg_email.setError("Please fill out this field");
} else {
//Here you can write the codes for checking email
}
if (reg_confirmemail.getText().toString().trim().isEmpty()) {
reg_confirmemail.setError("Please fill out this field");
} else {
//Here you can write the codes for checking confirmemail
}
mAuth.createUserWithEmailAndPassword(reg_email.getText().toString(),reg_password.getText().toString());
}
});
dialog.show();
}
}
and this is the part that the user uses to save and view the diary
package ir.mhkz.loginandsignup;
import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.constraint.solver.widgets.Snapshot;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
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.ArrayList;
import java.util.List;
public class diary extends MainActivity {
EditText titleText;
EditText diaryText;
Button saveBtn;
Button viewdata;
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference mDatabase = database.getReference().child("diary");
TextView dtitle;
TextView ddiary;
Button clear;
@Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.diary_layout);
titleText=findViewById(R.id.editTextTitle);
diaryText=findViewById(R.id.editTextDiary);
saveBtn = findViewById(R.id.buttonSaveDiary);
viewdata= findViewById(R.id.viewbutton);
dtitle = findViewById(R.id.displaytitle);
ddiary = findViewById(R.id.displaydiary);
clear = findViewById(R.id.buttoncln);
dtitle.setMovementMethod(new ScrollingMovementMethod());
ddiary.setMovementMethod(new ScrollingMovementMethod());
final FirebaseAuth mAuth = null;
final String userId;
if (mAuth.getCurrentUser() != null){
userId = mAuth.getCurrentUser().getUid();
}
viewdata.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dtitle.setText("");
ddiary.setText("");
Toast.makeText(getApplication().getBaseContext(), "text updated", Toast.LENGTH_SHORT).show();
mDatabase.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
List<diaryclass> DiaryList = new ArrayList<diaryclass>();
dtitle.setText("");
ddiary.setText("");
for (DataSnapshot diarySnapshot: dataSnapshot.getChildren()) {
diaryclass thediary = diarySnapshot.getValue(diaryclass.class);
DiaryList.add(thediary);
}
for (int i=0 ; i<DiaryList.size();i++) {
diaryclass listofstuff = DiaryList.get(i);
String titlelist=listofstuff.Title;
String diarylist = listofstuff.Diary;
dtitle.append(i+ "\n" ) ;
dtitle.append(titlelist + "\n" ) ;
dtitle.append("\n" ) ;
dtitle.append("\n" ) ;
dtitle.append(diarylist + "\n" ) ;
dtitle.append("\n" ) ;
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
});
saveBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String diaryTitle = titleText.getText().toString();
String diaryContent = diaryText.getText().toString();
if (mAuth.getCurrentUser() != null) {
mDatabase.child(userId).setValue(diaryTitle, diaryContent)
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()) {
Toast.makeText(getApplication().getBaseContext(), "Saved...", Toast.LENGTH_SHORT).show();
titleText.setText("");
diaryText.setText("");
}
}
});
}
clear.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
titleText.setText("");
diaryText.setText("");
dtitle.setText("");
ddiary.setText("");
Toast.makeText(getApplication().getBaseContext(), "text cleared ", Toast.LENGTH_SHORT).show();
}
});
}
});
}
}
and the gradle is working just fine so i dont think it is needed and the other class is already available up there
logcat below
2019-04-15 04:00:01.684 1778-1803/? E/storaged: getDiskStats failed with result NOT_SUPPORTED and size 0
2019-04-15 04:00:57.777 1869-1869/? E/netmgr: Failed to open QEMU pipe 'qemud:network': Invalid argument
2019-04-15 04:00:57.777 1869-1869/? E/netmgr: WifiForwarder unable to open QEMU pipe: Invalid argument
2019-04-15 04:01:00.007 1926-1940/? E/memtrack: Couldn't load memtrack module
2019-04-15 04:01:00.032 1926-1940/? E/memtrack: Couldn't load memtrack module
2019-04-15 04:01:00.049 1926-1940/? E/memtrack: Couldn't load memtrack module
2019-04-15 04:01:01.687 1778-1803/? E/storaged: getDiskStats failed with result NOT_SUPPORTED and size 0
Upvotes: 0
Views: 849
Answers (2)
Reputation: 61
Sorry but symbols like @ cannot be use as a name for a firebase database path that's why they generate unique key.
Upvotes: 0
Reputation: 199
I did not download your complete code but try to save data on firebase like this
First change DatabaseReference mDatabase = database.getReference("diary"); if diary is the direct child of your database to DatabaseReference mDatabase = database.getReference().child("diary");
2nd you have to get the id of the current user for that
FirebaseAuth mAuth;
String userId;
if (mAuth.getCurrentUser() != null){
userId = mAuth.getCurrentUser().getUid();
}
3rd to save data on Firebase DataBase make sure current user is loged in
if (mAuth.getCurrentUser() != null){
mDatabase.child(userId).setValue(userDiary)
.addOnCompleteListener(task -> {
if (task.isSuccessful()) {
Toast.makeText(getActivity(),"Saved...",Toast.LENGTH_SHORT).show();
titleText.setText("");
diaryText.setText("");
}
});
}
4th be sure in your diaryclass make GETTER and SETTER for all your variabels.
Upvotes: 1
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