CODEWITHSUNDEEP
androidfirebasefirebase-realtime-database
ghost
ghost

Reputation: 24

How to bypass the Firebase Database refresh in Android

While I am currently in other activity if my database changes my app get me into the list view page which is as shown bellow:

I wanna know how to I stop refreshing the data while I am not currently looking at that activity Operating Code

 DatabaseReference myRef = FirebaseDatabase.getInstance().getReference().child("new");
    myRef.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            // This method is called once with the initial value and again
            // whenever data at this location is updated.
            //   Object key = dataSnapshot.getValue();
            if (dataSnapshot.hasChild(ch) ) {
                Map<String ,Object> key = (Map<String, Object>) dataSnapshot.child(ch).getValue();
                sname = (String) key.get("sname");
             //   Log.v("ABCD ", "Value is: " + key.get("sname"));
                if(dataSnapshot.getValue() != null)
                {
                    Intent intent = new Intent("com.example.sunny.new.Selectclass");
                    startActivity(intent);
                    finish();
                }
            }  else{

                AlertDialog.Builder builder1 = new AlertDialog.Builder(MainActivity.this);
                builder1.setMessage("Check your Code");
                builder1.setCancelable(true);

                builder1.setPositiveButton(
                        "Ok",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                dialog.cancel();
                            }
                        });

                AlertDialog alert11 = builder1.create();
                alert11.show();
            }


        }

        @Override
        public void onCancelled(DatabaseError error) {
            // Failed to read value
            Log.v("XYZ", "Failed to read value.", error.toException());
        }
    });

Upvotes: 0

Views: 1135

Answers (1)

Devrim
Devrim

Reputation: 15543

At onPause method of your activity, remove your event listener. And add it at onResume method.

Detail:

Define your DatabaseReference and ValueEventListener as reachable variables because you are going to reference them at onPause and onResume methods:

ValueEventListener myValueEventListner;
DatabaseReference myRef;

// Below may be inside onCreate method:
myRef = FirebaseDatabase.getInstance().getReference().child("new");
myValueEventListner= new ValueEventListener() {
    // your event listener logic here
};

Add & remove at onPause and onResume methods: 

@Override
public void onResume() {
     super.onResume();
     myRef.addValueEventListener(myValueEventListner);
}

@Override
public void onPause() {
    super.onPause();
    myRef.removeEventListener(myValueEventListner);
}

Upvotes: 2

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