没有这样的表找到android

Question

我正在为一个应用程序创建数据库，这是我的代码给我错误没有这样的表找到问题请帮忙

protected static final String player = ("CREATE TABLE " + table_player
            + " (" + player_id + " INTEGER PRIMARY KEY AUTOINCREMENT, "
            + player_name + " TEXT, " + player_dob + "INTEGER" + player_gender + " TEXT);");

oncreatdatabase（）

中的

db.execSQL(player);

插入方法：

public long insert_Place(  )//, String _Placealti)
    {    
        try
        {
            SQLiteDatabase db= this.getWritableDatabase();
            ContentValues contentValues = new ContentValues();  
            contentValues.put(player_name, "name"); 
            contentValues.put(player_dob,  "123");
            contentValues.put(player_gender, "male");

            return db.insert(table_player, null, contentValues);
        }
        catch(Exception ex)
        {
            Log.d("Insert:  insert_Place",ex.toString());
        }
        return 0;
    }

Answer 1

在,之后错过INTEGER并在列名和列类型之间添加一个空格

+ " INTEGER " + player_gender + " + " TEXT);")//  Missed , after INTEGER and add one space before INTEGER

正确：

protected static final String player = ("CREATE TABLE " + table_player
        + " (" + player_id + " INTEGER PRIMARY KEY AUTOINCREMENT, "
        + player_name + " TEXT, " + player_dob + " INTEGER," + player_gender + " TEXT);");

这就是为什么你的桌子没有装箱而且你没有这样的桌子找到了例外

Answer 2

由于语法错误，未创建表：

player_name + " TEXT, " + player_dob + "INTEGER" + player_gender + " TEXT);"

应该是

player_name + " TEXT, " + player_dob + " INTEGER, " + player_gender + " TEXT);"

Answer 3

//write to this

String player = "CREATE TABLE IF NOT EXISTS "
            + table_player + "(" + player_id
                      + " integer primary key , " + player_name
                      + " text ,"+ player_dob+" integer,"+player_gender+" text);";