Error When Updating Data : java.lang.NullPointerException: Can't pass null for argument 'pathString' in child()

Question

This is a simple sample of a crud function with Firebase via Android Studio. I found several obstacles in the update process, along with errors that appeared when updating.

java.lang.NullPointerException: Can't pass null for argument 'pathString' in child()

Is there a simple solution to overcome this? Here is the complete code for the update activity.

    import static android.text.TextUtils.isEmpty;
    import android.annotation.SuppressLint;
    import android.app.DatePickerDialog;
    import android.os.Bundle;
    import android.text.TextUtils;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.RadioButton;
    import android.widget.RadioGroup;
    import android.widget.Spinner;
    import android.widget.Toast;
    import androidx.appcompat.app.AppCompatActivity;
    
    //import com.bumptech.glide.Glide;
    import com.google.android.gms.tasks.OnSuccessListener;
    import com.google.firebase.database.DatabaseReference;
    import com.google.firebase.database.FirebaseDatabase;
    
    import java.text.SimpleDateFormat;
    
    public class UpdateLaundry extends AppCompatActivity {
    //deklarasi variable
    private EditText namaBaru, tempatBaru;
    private Spinner jenisBaru;
    private RadioButton ktgBaru, new_Rb1, new_Rb2, new_Rb3;
    private Button update;
    private DatabaseReference database;
    private RadioGroup rgkategoriBaru;
    private String cekNama, cekTempat, cekJenis, cekKategori;

    @SuppressLint("WrongViewCast")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_updatelaundry);

        namaBaru = findViewById(R.id.new_nama);
        tempatBaru = findViewById(R.id.new_lokasi);
        jenisBaru = findViewById(R.id.newspinner_jenis);
        update = findViewById(R.id.btn_update);
        new_Rb1 = findViewById(R.id.new_rb1);
        new_Rb2 = findViewById(R.id.new_rb2);
        new_Rb3 = findViewById(R.id.new_rb3);
        rgkategoriBaru = findViewById(R.id.new_rg_ktg);

        final String getKategori = getIntent().getExtras().getString("dataKategori");

        if (getKategori.equals("Cuci")) {
            new_Rb1.setChecked(true);
        } else if (getKategori.equals("Setrika")) {
            new_Rb2.setChecked(true);
        } else if (getKategori.equals("Cuci dan Setrika")) {
            new_Rb3.setChecked(true);
        }

        database= FirebaseDatabase.getInstance().getReference();
        getData();


        update.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                int pilihKtgBaru = rgkategoriBaru.getCheckedRadioButtonId();
                ktgBaru = findViewById(pilihKtgBaru);
                cekNama = namaBaru.getText().toString();
                cekTempat = tempatBaru.getText().toString();
                cekJenis = jenisBaru.getSelectedItem().toString();


//mengubah data databse menggunakan data yang baru di inputkan
                if (isEmpty(cekNama) || isEmpty(cekTempat)) {
                    Toast.makeText(UpdateLaundry.this, "Data tidak boleh kosong", Toast.LENGTH_SHORT).show();
                } else {
                                    /*Processing Update Data
                                    Reload setter recomended to get new data from user*/

                    Laundry setLaundry = new Laundry();
                    setLaundry.setNama(namaBaru.getText().toString());
                    setLaundry.setJenis(jenisBaru.getSelectedItem().toString());
                    setLaundry.setTempat(tempatBaru.getText().toString());
                    setLaundry.setKategori(ktgBaru.getText().toString());
                    updateLaundry(setLaundry);

                }
            }
        });
    }

    private boolean isEmpty(String s){
        return TextUtils.isEmpty(s);
    }

    //mengambil data dari database ke form update
    private void getData() {

        final String getNama = getIntent().getExtras().getString("dataNama");
        final String getTempat = getIntent().getExtras().getString("dataTempat");
        final String getKategori = getIntent().getExtras().getString("dataKategori");
        final String getJenis = getIntent().getExtras().getString("dataJenis");


        namaBaru.setText(getNama);
        tempatBaru.setText(getTempat);


    }
    private void updateLaundry(Laundry ldry) {

        String getKey = getIntent().getExtras().getString("getPrimaryKey");
        database.child("Admin")
                .child("Laundry")
                .child(getKey)
                .setValue(ldry)
                .addOnSuccessListener(new OnSuccessListener<Void>() {
                    @Override
                    public void onSuccess(Void aVoid) {
                        namaBaru.setText("");
                        tempatBaru.setText("");

                        Toast.makeText(UpdateLaundry.this, "Data Berhasil diubah", Toast.LENGTH_SHORT).show();
                        finish();
                    }
                });
    }

score -1 · Answer 1 · answered Dec 17 '22 at 06:53

If I'm right, your getKey variable in updateLaundry() method is nullable, since your are setting the value of the intent key getPrimaryKey to this variable. So whenever you dont pass the value for getPrimaryKey via the intent then getKey will be set as null and this NPE can occur.

Therefore, either do a null check for getkey before you use it or make sure you are passing the key via the intent from the previous activity.

Error When Updating Data : java.lang.NullPointerException: Can't pass null for argument 'pathString' in child()

1 Answers1