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Estou fazendo um checklist pre definido salvo no banco, porem não consigo atualizar o checkbox marcado para o banco de dados. Segue o codigo, fiz o teste de debug que sempre dar erro na parte “Boolean checkTarefa”. Nao consigo achar uma solucao que funcione no meu código.

Segue meu código: Main Activity:

public class MainActivity extends AppCompatActivity {  EditText codigoTarefa; Button btnSalvar; CheckBox tarefaChBox; TextView nomeTarefa; ListView listTarefas; BancoDados db = new BancoDados(this); Tarefa t = new Tarefa();  @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);      codigoTarefa = findViewById(R.id.codigoTarefa);     btnSalvar = findViewById(R.id.btnSalvar);     tarefaChBox = findViewById(R.id.tarefaChBox);     nomeTarefa = findViewById(R.id.nomeTarefa);      if (db.listaTodasTarefas().size() == 0) {         db.addTarefa(new Tarefa("Tarefa1", 0));         db.addTarefa(new Tarefa("Tarefa2", 0));         db.addTarefa(new Tarefa("Tarefa3", 0));     }      btnSalvar.setOnClickListener(new View.OnClickListener() {         @Override         public void onClick(View view) {             Boolean checkTarefa = tarefaChBox.isChecked();             for (int i = 0; i <= 3; i++) {                 t = db.selecionarTarefa(i);                 if (checkTarefa.booleanValue() == true) {                     db.atualizaTarefa(new Tarefa(i, t.getNometarefa(), 1));                  } else {                     db.atualizaTarefa(new Tarefa(i, t.getNometarefa(), 0));                 }              }         }     });      listTarefas = findViewById(R.id.listaTarefa);     ArrayAdapter adapter = new TarefaAdapter(this, listarTarefas());     listTarefas.setAdapter(adapter);   }   private ArrayList<Tarefa> listarTarefas() {     ArrayList<Tarefa> tarefas = new ArrayList<Tarefa>();      for (int i = 1; i <= 3; i++) {         t = db.selecionarTarefa(i);         //Exibir tarefas no listView         tarefas.add(new Tarefa(t.getNometarefa(), t.getTarefa()));     }      return tarefas; }  } 

Classe TarefaAdapter:

public class TarefaAdapter extends ArrayAdapter<Tarefa> { private final Context context; private final ArrayList<Tarefa> tasks;  public TarefaAdapter(Context context, ArrayList<Tarefa> tasks) {     super(context, R.layout.tarefa, tasks);     this.context = context;     this.tasks = tasks; }  public View getView(int position, View convertView, ViewGroup parent) {      LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);     View rowView = inflater.inflate(R.layout.tarefa, parent, false);     TextView nomeTarefa = rowView.findViewById(R.id.nomeTarefa);     CheckBox nomeCheck = rowView.findViewById(R.id.tarefaChBox);      nomeTarefa.setText(tasks.get(position).getNometarefa());      if (nomeCheck.isChecked()) {          tasks.get(position).getTarefa();     }       return rowView;  }     } 

Classe Banco de dados:

 public class BancoDados extends SQLiteOpenHelper {  private static final int VERSAO_BANCO = 1; private static final String BANCO_TAREFA = "bd_tarefas"; private static final String TABELA_TAREFA = "tb_tarefas"; private static final String COLUNA_CODIGO = "codigoTarefa"; private static final String COLUNA_NOME = "nomeTarefa"; private static final String COLUNA_CHECK = "checkTarefa";   public BancoDados(Context context) {     super(context, BANCO_TAREFA, null, VERSAO_BANCO);  }  @Override public void onCreate(SQLiteDatabase db) {      String QUERY_COLUNA = "CREATE TABLE " + TABELA_TAREFA + "(" +             COLUNA_CODIGO + " INTEGER PRIMARY KEY, " + COLUNA_NOME + " TEXT, " + COLUNA_CHECK + " INTEGER ); ";     db.execSQL(QUERY_COLUNA); }  @Override public void onUpgrade(SQLiteDatabase db, int i, int i1) {  }  /*CRUD ABAIXO*/  void addTarefa(Tarefa tarefa) {     SQLiteDatabase db = this.getWritableDatabase();      ContentValues values = new ContentValues();      values.put(COLUNA_NOME, tarefa.getNometarefa());     values.put(COLUNA_CHECK, tarefa.getTarefa());     db.insert(TABELA_TAREFA, null, values);     db.close();  }   Tarefa selecionarTarefa(int codigo) {     SQLiteDatabase db = this.getReadableDatabase();      Cursor cursor = db.query(TABELA_TAREFA, new String[]{COLUNA_CODIGO, COLUNA_NOME, COLUNA_CHECK}, COLUNA_CODIGO + " = ? ", new String[]{             String.valueOf(codigo)}, null, null, null, null);      if (cursor != null) {         cursor.moveToFirst();     }     Tarefa tarefa = new Tarefa(Integer.parseInt(cursor.getString(0))             , cursor.getString(1), Integer.parseInt(cursor.getString(2)));     return tarefa; }  void atualizaTarefa(Tarefa tarefa) {      SQLiteDatabase db = this.getWritableDatabase();      ContentValues values = new ContentValues();      values.put(COLUNA_NOME, tarefa.getNometarefa());     values.put(COLUNA_CHECK, tarefa.getTarefa());      db.update(TABELA_TAREFA, values, COLUNA_CODIGO + " = ?"             , new String[]{String.valueOf(tarefa.getCodigotar())});  }  public List<Tarefa> listaTodasTarefas() {      List<Tarefa> listaTarefas = new ArrayList<Tarefa>();     String query = "SELECT * FROM " + TABELA_TAREFA;      SQLiteDatabase db = this.getWritableDatabase();     Cursor c = db.rawQuery(query, null);      if (c.moveToFirst()) {         do {             Tarefa tarefa = new Tarefa();             tarefa.setCodigotar(Integer.parseInt(c.getString(0)));             tarefa.setNometarefa(c.getString(1));             tarefa.setTarefa(Integer.parseInt(c.getString(2)));              listaTarefas.add(tarefa);           } while (c.moveToNext());     }     return listaTarefas;  }       } 

Classe Tarefa:

public class Tarefa { private int codigotar; private String nometarefa; private int tarefa = 0;   public Tarefa() {  }   //insert data public Tarefa(String _nometarefa, int _tarefa) {     this.nometarefa = _nometarefa;     this.tarefa = _tarefa; }  //update public Tarefa(int _codigotar, String _nometarefa, int _tarefa) {     this.codigotar = _codigotar;     this.nometarefa = _nometarefa;     this.tarefa = _tarefa; }   public int getCodigotar() {     return codigotar; }  public void setCodigotar(int codigotar) {     this.codigotar = codigotar; }   public String getNometarefa() {     return nometarefa; }  public void setNometarefa(String nometarefa) {     this.nometarefa = nometarefa; }  public int getTarefa() {     return tarefa; }  public void setTarefa(int tarefa) {     this.tarefa = tarefa; } } 

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