游标未封闭的方向变化

Question

严格的模式，运行时，当手机变革的方向，我的应用程序将与错误

资源在连接的堆栈跟踪获取，但从来没有公布过崩溃。 有关避免资源泄漏的信息，请参阅java.io.Closeable。 java.lang.Throwable中：显式的终止方法“关闭”不叫

奇怪的是，如果我以调试模式运行应用程序，并把断点在所有cursor.close（）只是为了确保它实际上是命中，所有的断点都会被击中，应用程序永远不会崩溃。

这是我的片段，它调用另一个包含所有SqlBrite查询和游标的类（为简洁起见，代码已缩短）。

public class MenuSummary extends Fragment{ 

private DbHelper dbHelper; 
private Observable<?> income1, income2; 
private Observable imin; 
private Subscription s; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    dbHelper = new DbHelper(getContext()); 
} 

@Override 
public void onPause(){ 
    super.onPause(); 
    s.unsubscribe(); 
} 

@Override 
public void onResume(){ 
    super.onResume(); 
    displaySummary(selectedYear,selectedMonth); 
} 

@Override 
public void onStop() { 
    super.onStop(); 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState){ 
    super.onActivityCreated(savedInstanceState); 
} 

private void displaySummary(final int selectedYear, final int selectedMonth){ 

    income1 = dbHelper.getIncome(selectedYear,selectedMonth,1); 
    income2 = dbHelper.getIncome(selectedYear,selectedMonth,2); 

    List<Observable<?>> myObservables = Arrays.asList(income1,income2); 
    imin = Observable.combineLatest(myObservables, new FuncN<List<BigDecimal>>() { 
     @Override 
     public List<BigDecimal> call(Object... args) { 
      List<BigDecimal> listIncome = new ArrayList<~>(); 
      listIncome.add((BigDecimal) args[0]); 
      listIncome.add((BigDecimal) args[1]); 
      return listIncome ; 
     } 
    } 
).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()); 
s = imin.subscribe(new Action1<List<BigDecimal>>() { 
@Override 
public void call(List<BigDecimal> expensesAndBalance) { 
    //do plenty of view.settext here 
}}); 
} 

这里是如何，包含了函数getIncome看起来像DbHelper类：

任何人都可以找出哪里我错在哪里？

public class DbHelper { 

     private MySQLiteHelper mySQLiteHelper; 
     SqlBrite sqlBrite = new SqlBrite.Builder().build(); 
     BriteDatabase briteDb; 
     Subscription subscription; 

     private static DbHelper instance; 
     public DbHelper(Context context) { 
      mySQLiteHelper = new MySQLiteHelper(context); 
      sqlBrite = new SqlBrite.Builder().build(); 
      briteDb = sqlBrite.wrapDatabaseHelper(mySQLiteHelper,Schedulers.io()); 
     } 

     public Observable<BigDecimal> getIncome(final int endYear, final int endMonth, final int moneyJar){ 
     final String[] args = new String[]{moneyJar + "", endYear + "", endMonth + "", endYear + "", }; 
     Observable<BigDecimal> myObservable; 
     myObservable = briteDb.createQuery(MySQLiteHelper.TABLE_INCOME, "SELECT total FROM " + MySQLiteHelper.TABLE_INCOME + 
       " WHERE moneyJar = ? AND ((year = ? AND month <= ?) OR (year < ?)) and isDeleted = 0", args) 
       .map(new Func1<SqlBrite.Query, BigDecimal>() { 
        @Override 
        public BigDecimal call(SqlBrite.Query query) { 
         Cursor cursor = query.run(); 
         BigDecimal income, incomeTotal = new BigDecimal(0); 
         if (cursor != null) { 
          try { 
           if (cursor.getCount() > 0 && cursor.moveToFirst()) { 
            do { 
             income = new BigDecimal(cursor.getString(cursor.getColumnIndex("total"))); 
             incomeTotal = incomeTotal.add(income); 
            } while (cursor.moveToNext()); 
           } 
          } catch (Exception e) { 
           e.printStackTrace(); 
          } finally { 
           cursor.close(); 
          } 
         } 
         return incomeTotal; 
        } 
       }); 
     return myObservable; 
    } 
} 

Answer 1

您没有关闭您的BriteDatabase实例。从docs

briteDb.close(); 

：

你应该当被关闭您的片段执行此

关闭底层SQLiteOpenHelper和删除缓存的读取和写入数据库。这并不妨碍现有的观察对象保留现有引用，并且不会尝试为新订阅创建新引用。