java - 我的 Firebase 数据库中的数据被覆盖。如何修复它？

Question

我正在将多个编辑文本中的数据添加到我的 Firebase 数据库中。它添加得很好，但是当我尝试再次添加它时，它不会创建新对象。它会覆盖前一个。

public class HomeActivity extends AppCompatActivity {
    Button logout;
    EditText etfinalyear,etcnic,etname,etpaygroup,etregion,etcurrentposition,etcurrentaddress,etphonenumber,etmobilenumber;
    FirebaseAuth mfirebaseauth;
    Button btnsave;
    private FirebaseAuth.AuthStateListener mauthstatelistener;
    DatabaseReference reff;
    users user;
    ImageView ntc;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        ntc = findViewById(R.id.ntc);
        etfinalyear = findViewById(R.id.edittextfinyear);
        etcnic = findViewById(R.id.edittextcnic);
        etname = findViewById(R.id.edittextname);
        etpaygroup = findViewById(R.id.edittextpaygroup);
        etregion = findViewById(R.id.edittextregion);
        etcurrentposition = findViewById(R.id.edittextcurrentposition);
        etcurrentaddress = findViewById(R.id.edittextcurrentaddress);
        etphonenumber = findViewById(R.id.edittextphonenumber);
        etmobilenumber = findViewById(R.id.edittextmobilenumber);
        btnsave = findViewById(R.id.save);
        logout = findViewById(R.id.signout);
        reff = FirebaseDatabase.getInstance().getReference().child("users");
        logout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                FirebaseAuth.getInstance().signOut();
                Intent logout = new Intent(HomeActivity.this,LoginActivity.class);
                startActivity(logout);


            }
        });
        user = new users();
        btnsave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Long phn = Long.parseLong(etphonenumber.getText().toString());
                Long mob = Long.parseLong(etmobilenumber.getText().toString());
                user.setCnic(etcnic.getText().toString());
                user.setFinyear(etfinalyear.getText().toString());
                user.setName(etname.getText().toString());
                user.setPaygroup(etpaygroup.getText().toString());
                user.setDirectorate(etregion.getText().toString());
                user.setCurrentposition(etcurrentposition.getText().toString());
                user.setResidentialaddress(etcurrentaddress.getText().toString());
                user.setPhonenumber(phn);
                user.setMobilenumber(mob);
                reff.child("user1").setValue(user);
                //reff.push().setValue(user);
                Toast.makeText(HomeActivity.this, "Data Saved Successfully", Toast.LENGTH_SHORT).show();
            }
        });



    }
}

Answer 1

每次您插入相同的引用时，这就是它被替换的原因
请确保您在子方法 .child("user1") 中传递的 String 应与 Firebase 中的完全相同。,试试这个 -

 user = new users();
btnsave.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Long phn = Long.parseLong(etphonenumber.getText().toString());
        Long mob = Long.parseLong(etmobilenumber.getText().toString());
        user.setCnic(etcnic.getText().toString());
        user.setFinyear(etfinalyear.getText().toString());
        user.setName(etname.getText().toString());
        user.setPaygroup(etpaygroup.getText().toString());
        user.setDirectorate(etregion.getText().toString());
        user.setCurrentposition(etcurrentposition.getText().toString());
        user.setResidentialaddress(etcurrentaddress.getText().toString());
        user.setPhonenumber(phn);
        user.setMobilenumber(mob);
        DatabaseReference newRef = reff.child("user1").push();
        newRef.setValue(user);
        //reff.push().setValue(user);
        Toast.makeText(HomeActivity.this, "Data Saved Successfully", Toast.LENGTH_SHORT).show();
    }
});