I have firebase database in my android project which contains three values: code, email, date. I am using switchcompat for counting present students in the firebase database. When switch will be checked, data will enter into the firebase database checking if the email is uniqe in the specific date. When switch will be unchecked, that current date's data will be removed. But my problem is that for the first time when I check the switch, it works fine. And in the second time after unchecking the switch once, when I check it once again, it enters data into firebase but also remove it automatically immediately even switch is still checked. I don't understand where is the problem in my code. I am providing my code in the below for working of SwitchCompat. Here is the code:
switch1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Date c = Calendar.getInstance().getTime();
SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy");
final String date = df.format(c);
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, -1);
final String previousDate = df.format(cal.getTime());
final int[] i = {0};
if (switch1.isChecked()) {
Query equery = present.orderByChild("email").equalTo(email);
equery.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (!dataSnapshot.exists()) {
String code = "1";
PresentStu presentStu = new PresentStu(FirebaseAuth.getInstance().getCurrentUser().getEmail(), date, code);
String uploadId = present.push().getKey();
present.child(uploadId).setValue(presentStu);
} else {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
String eemail = snapshot.child("email").getValue().toString();
String ddate = snapshot.child("date").getValue().toString();
if (eemail.equals(eemail) && ddate.equals(date)) {
i[0]++;
break;
}
}
// Toast.makeText(User.this,""+i[0]+"",Toast.LENGTH_SHORT).show();
if (i[0] < 1){
String code = "1";
PresentStu presentStu = new PresentStu(FirebaseAuth.getInstance().getCurrentUser().getEmail(), date, code);
String uploadId = present.push().getKey();
present.child(uploadId).setValue(presentStu);
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
} else {
Query equery = present.orderByChild("email").equalTo(email);
equery.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
String eemail = snapshot.child("email").getValue().toString();
String ddate = snapshot.child("date").getValue().toString();
if (eemail.equals(eemail) && ddate.equals(previousDate)) {
present.child(dataSnapshot.getChildren().iterator().next().getKey()).child("code").setValue("0");
}
if (eemail.equals(eemail) && ddate.equals(date)) {
snapshot.getRef().removeValue();
break;
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
});
Please, help me to find out the lacking in my code.
