android sqlite数据库上的错误日志

Question

我在我的 android 应用程序中使用 sqlite。 我创建了我的数据库，一切都很好，但是在 LogCat 上，我有一些错误，我不知道是什么意思，你能帮我解决这个错误吗？ 它们重要吗？

我的代码：

public class Helper extends SQLiteOpenHelper {

public Helper(Context params)
{
    super(params, RastakDatabse.DATABASE_NAME, null, 3);

}   

@Override
public void onCreate(SQLiteDatabase db) {
      String CREATE_TABLE =  "CREATE TABLE " + Province.TABLE_NAME + " (" +
                Province._ID + " INTEGER PRIMARY KEY," +
                Province.PROVINCE_NAME +" TEXT ";


        db.execSQL(CREATE_TABLE);

        CREATE_TABLE =   "CREATE TABLE " + City.TABLE_NAME + " (" +
                City.CITY_ID + " INTEGER PRIMARY KEY," +
                City.CITY_NAME +" TEXT, " +
                City.PROVINCE_ID +"INTEGER)";


        db.execSQL(CREATE_TABLE);

        CREATE_TABLE ="CREATE TABLE " + Company.TABLE_NAME + " (" +
                Company.COMPANY_ID +" INTEGER PRIMARY KEY," +
                Company.CITY_ID +" INTEGER, " +
                Company.COMPANY_NAME+" TEXT," +
                Company.LOCATION+" TEXT ," +
                Company.GUILD +" INTEGER)" ;
        db.execSQL(CREATE_TABLE);


        CREATE_TABLE= "CREATE TABLE " + Guild.TABLE_NAME + " (" +
        Guild.GUILD_ID + " INTEGER PRIMARY KEY," +
        Guild.GUILD_NAME +" TEXT)";
        db.execSQL(CREATE_TABLE);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    db.execSQL("DROP TABLE IF EXISTS "+RastakDatabse.DATABASE_NAME);    
}


public void add(String name,String loc,long id) {
    SQLiteDatabase db=this.getWritableDatabase();
    ContentValues values=new ContentValues();
    values.put("id",id );
    values.put("name",name );
    values.put("loc",loc);   
    db.insert("Location", null, values);
    db.close();
}

主要活动：

public void DownloadLocation() {
    Query q=new Query(getApplicationContext());

    final Helper hel=new Helper(getApplicationContext());

            List<Location> Loc=new ArrayList<Location>();  
              JSONObject toSend = new JSONObject();

             int db_count = hel.check();    
                try {           
                    toSend.put("city_id", 1);
               String result="";     
                JSONTransmitter transmitter = new JSONTransmitter();
                transmitter.url="http://192.168.1.5/include/json/locations.php";
              AsyncTask<JSONObject, JSONObject, JSONObject> jo=  transmitter.execute(new JSONObject[] {toSend});
             JSONObject jjjj=jo.get();
            JSONArray array=jjjj.getJSONArray("locations");
            Log.d("count:::", array.length()+"");
        for (int i = 0; i < array.length(); i++) {
            Location lo=new Location();

                JSONObject json_data = array.getJSONObject(i);
                JSONArray arr1=json_data.getJSONArray("location");
                hel.add(arr1.getString(1), arr1.getString(2),arr1.getInt(0));
            Log.i("SDFDS", arr1.getString(2)); 
            lo.id=arr1.getInt(0);  
            lo.name=arr1.getString(1);
            lo.loc=arr1.getString(2);
            Loc.add(lo);
            hel.close();   

                } 
                }   
        catch (JSONException e) {
            Log.e("EROOR1", e.getMessage());  
            } 
                catch (InterruptedException e) {
            Log.e("EROOR1", e.getMessage());        
        } 
                catch (ExecutionException e) {
            Log.e("EROOR2", e.getMessage());
        } 

        }

Answer 1

您尚未在任何地方关闭您的数据库。如果您完成了获取数据库之外的所有信息，则必须关闭游标和数据库，如下所示：

  yourCursor.close();

  yourDatabase.close();

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