firebaseDatabase = FirebaseDatabase.getInstance();
    databaseReference = firebaseDatabase.getReference("PersonalDetails");

private void signInuser(String phone, String password) {
    progress.show();
    final String localphone=phone;
    final String localpassword=password;
    databaseReference.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (dataSnapshot.exists()) {
                progress.dismiss();
                for (DataSnapshot childSnapshot : dataSnapshot.getChildren()) {
                    PersonalData user = childSnapshot.getValue(PersonalData.class);
                    if (user.getPasssword().equals(localpassword) & user.getMobile().equals(localphone)) {
                        Toast.makeText(MainActivity.this, "Succesfully login", Toast.LENGTH_SHORT).show();
                        startActivity(new Intent(MainActivity.this, Main2Activity.class));
                        finish();
                    } else {
                        Toast.makeText(getApplicationContext(), "Wrong Credential", Toast.LENGTH_SHORT).show();
                    }
                }
            }
        }
        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });


}