SQLite的连接对象泄露 - 机器人 [英] SQLite connection object leaked - Android

问题描述

我在做我的第一个Android的应用程序，我花了一些源码教程第一，教我用一个databaseHelper扩展SQLiteOpenHelper。所以我的databaseHelper确实扩展SQLiteOpenHelper。我得到了logcat的一个SQLite连接泄漏预警所以想怎样做以修复一些建议。

I am making my first android app, and I took some sqlite tutorials first, that taught me to use a databaseHelper that extends SQLiteOpenHelper. So my databaseHelper does extend SQLiteOpenHelper. I get a sqlite connection leak warning in the Logcat so would like some advice about what to do to fix that.

我得到这个错误：

02-01 21:39:50.740: W/SQLiteConnectionPool(32061): A SQLiteConnection object for database '/data/data/com.btf271.fashionassistant/databases/clothingManager' was leaked!  Please fix your application to end transactions in progress properly and to close the database when it is no longer needed.

我databaseHelper函数被调用的地方发生泄漏：

My databaseHelper functions that are called where the leak occurs:

 public List<Sticker> getObjectsByGenderAndCategory(String gender, String category) {
        List<Sticker> objects = new ArrayList<Object>();
        String selectQuery = String.format(
                "SELECT * FROM %s WHERE %s = \"%s\" AND %s = \"%s\"",
                TABLE_OBJECT, KEY_GENDER, gender, KEY_CATEGORY, category);

        Log.e(LOG, selectQuery);

        SQLiteDatabase db = this.getReadableDatabase();
        Cursor c = db.rawQuery(selectQuery, null);
     try{
        // looping through all rows and adding to list
        if (c.moveToFirst()) {
            do {
                Object o = createClothingItemJavaObject(c);

                // adding to object list
                objects.add(o);
            } while (c.moveToNext());
        }
     }finally {
           c.close();
db.close();
     }
        return objects;
    }

我发现这里面我会尝试明天。这晚。

感谢。

推荐答案

我所做的只是实现这个回答类似的问题，现在，它不显示SQL连接对象泄漏错误。我不能推荐这还不够。只用了几分钟的时间来实施和工​​作。

All I did was implement this answer to a similar question and now it doesn't show the SQL connection object leak error. I cannot recommend this enough. It only took a few minutes to implement and worked.

下面是code：

public class DatabaseHelper extends SQLiteOpenHelper { 

  private static DatabaseHelper mInstance = null;

  private static final String DATABASE_NAME = "database_name";
  private static final String DATABASE_TABLE = "table_name";
  private static final int DATABASE_VERSION = 1;

  public static DatabaseHelper getInstance(Context ctx) {

    // Use the application context, which will ensure that you 
    // don't accidentally leak an Activity's context.
    // See this article for more information: http://bit.ly/6LRzfx
    if (mInstance == null) {
      mInstance = new DatabaseHelper(ctx.getApplicationContext());
    }
    return mInstance;
  }

  /**
   * Constructor should be private to prevent direct instantiation.
   * make call to static factory method "getInstance()" instead.
   */
  private DatabaseHelper(Context ctx) {
    super(ctx, DATABASE_NAME, null, DATABASE_VERSION);
  }
}

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