Question

我是android编程和SQLite的新手，遇到了障碍。我有3张桌子; teams，leagues和一个名为teams_vs_leagues的查找表，其中包含团队的ID和联盟的ID，以便它们相互关联。以下是表格设计：

//Create teams Table
private static final String CREATE_TEAMS_TABLE = "CREATE TABLE "
        + TEAMS_TABLE + "("
        + ID + " INTEGER PRIMARY KEY,"
        + TEAM_NAME + " TEXT,"
        + IMAGE + " TEXT" + ")";

//Create leagues Table
private static final String CREATE_LEAGUES_TABLE = "CREATE TABLE "
        + LEAGUES_TABLE + "("
        + ID + " INTEGER PRIMARY KEY,"
        + LEAGUE_NAME + " TEXT" + ")";

//Create teams_vs_leagues Table
private static final String CREATE_TEAMS_VS_LEAGUES_TABLE = "CREATE TABLE "
        + TEAMS_VS_LEAGUES_TABLE + "("
        + ID + " INTEGER PRIMARY KEY,"
        + TEAM_ID + " INTEGER,"
        + LEAGUE_ID + " INTEGER,"
        + POINTS + " INTEGER"+ ")";

以下是我添加新团队的方法：

public boolean createTeam(String team_name, String image, String team_id, String league_id, String points) {
 SQLiteDatabase db = this.getWritableDatabase();

 ContentValues values = new ContentValues();

 values.put(TEAM_NAME, team_name);
 values.put(IMAGE, image);

 long result = db.insert(TEAMS_TABLE, null, values);

 if (result == -1)
  return false;
 else
  return true;
}

如何将TEAM_ID作为上面插入内容的ID添加到teams_vs_league表中？任何帮助都将非常感激。

Answer 1

根据SQLite API Android SQLite API，insert方法返回新插入行的行ID，如果发生错误则返回-1。

因此，您可以按如下方式更改代码：

  long result = db.insert(TEAMS_TABLE, null, values);

  if (result == -1) { 
      //throw error here
      return false;
   } else { 
     //result contains the id needed
     //do something
     return true;
  }

干杯！快乐编程！

Answer 2

insert()方法返回新插入行的行ID，如果发生错误则返回-1。

所以你可以修改你的代码：

if (result == -1)
    return false;
else
    //create the record in the teams_vs_leagues here
    //using result as TEAM_ID and league_id as LEAGUE_ID 

    return true;
}

SQLite从前一个插入插入id以填充另一个表中的列的值

2 个答案: