O app para de responder quando inicia, ja tentei corrigir o codigo, mas não estou encontrando o erro, se vocês puderem me ajudar. Lista Activity
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AlunoDAO dao = new AlunoDAO(this);
List<Aluno> alunos = dao.buscaAlunos();
dao.close();
ListView listaAlunos = (ListView) findViewById(R.id.lista_alunos);
ArrayAdapter<Aluno> adapter = new ArrayAdapter<Aluno>(this, android.R.layout.simple_list_item_1, alunos);
listaAlunos.setAdapter(adapter);
Button novoAluno = (Button) findViewById(R.id.novo_aluno);
novoAluno.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick (View v){
Intent intentVaiProFormulario = new Intent (MainActivity.this, FormularioActivity.class);
startActivity(intentVaiProFormulario);
}
});
}
}Formulario Activity
public class FormularioActivity extends AppCompatActivity {
private FormularioHelper helper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_formulario);
helper = new FormularioHelper(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_formulario, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_formulario_ok:
Aluno aluno = helper.pegaAluno();
AlunoDAO dao = new AlunoDAO(this);
dao.insere(aluno);
dao.close();
Toast.makeText(FormularioActivity.this, "Aluno " + aluno.getNome() + " salvo!", Toast.LENGTH_SHORT).show();
finish();
break;
}
return super.onOptionsItemSelected(item);
}
}AlunoDAO
public class AlunoDAO extends SQLiteOpenHelper{
public AlunoDAO(Context context) {
super(context, "Agenda", null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
String sql = "CREATE TABLE Alunos (id INTEGER PRIMARY KEY, nome TEXT NOT NULL, endereco TEXT, telefone TEXT, site TEXT,nota REAL);";
db.execSQL(sql);
}
@Override
public void onUpgrade(SQLiteDatabase db, int versaoAntiga, int versaoNova) {
String sql = "DROP TABLE IF EXISTS Alunos";
db.execSQL(sql);
onCreate(db);
}
public void insere(Aluno aluno) {
SQLiteDatabase db = getWritableDatabase();
ContentValues dados = new ContentValues();
dados.put("nome", aluno.getNome());
dados.put("endereco", aluno.getEndereco());
dados.put("telefone", aluno.getTelefone());
dados.put("site", aluno.getSite());
dados.put("nota", aluno.getNota());
db.insert("Alunos", null, dados);
}
public List<Aluno> buscaAlunos() {
SQLiteDatabase db = getReadableDatabase();
Cursor c = db.rawQuery("SELECT * FROM Aluno;",null);
List<Aluno> alunos = new ArrayList<Aluno>();
while (c.moveToNext()) {
Aluno aluno = new Aluno();
aluno.setId(c.getLong(c.getColumnIndex("id")));
aluno.setNome(c.getString(c.getColumnIndex("nome")));
aluno.setEndereco(c.getString(c.getColumnIndex("endereco")));
aluno.setTelefone(c.getString(c.getColumnIndex("telefone")));
aluno.setSite(c.getString(c.getColumnIndex("site")));
aluno.setNota(c.getDouble(c.getColumnIndex("nota")));
alunos.add(aluno);
}
c.close();
return alunos;
}
}O erro
FATAL EXCEPTION: main
Process: br.com.alura.agenda, PID: 23145
java.lang.RuntimeException: Unable to resume activity {br.com.alura.agenda/br.com.alura.agenda.MainActivity}: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3121)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3152)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
at android.database.CursorWindow.nativeGetString(Native Method)
at android.database.CursorWindow.getString(CursorWindow.java:438)
at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
at br.com.alura.agenda.modelo.AlunoDAO.buscaAlunos(AlunoDAO.java:56)
at br.com.alura.agenda.MainActivity.carregarLista(MainActivity.java:36)
at br.com.alura.agenda.MainActivity.onResume(MainActivity.java:45)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1281)
at android.app.Activity.performResume(Activity.java:6320)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3110)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3152)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
10-17 19:49:26.680 23145-23151/br.com.alura.agenda W/art: Suspending all threads took: 7.817ms
