Android:E / SQLiteDatabase:插入错误; android.database.sqlite.SQLiteException:没有这样的列

时间:2018-05-16 10:40:38

标签: android sqlite

朋友们!  我试图从xml文件填充一个简单的数据库,但是在标题中收到一个错误,并且在日志中写入,列中的值放错了。

我不明白,问题出在哪里,所以我请求你的帮助。代码如下。 非常感谢。

XML文件:

<?xml version="1.0" encoding="utf-8"?>
<cards>
    <record path="R.mipmap.ot1"  woman = "wfew" man = "qwe"/>
    <record path="R.mipmap.ot2"  woman = "rewr" man = "dwd"/>
</cards>

DBhelper类:

class DBHelper extends SQLiteOpenHelper {


    public DBHelper(Context context) {

        super(context, "myDB", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        Log.d(LOG_TAG, "--- onCreate database ---");

        db.execSQL("create table mytable ("
                + "id integer primary key autoincrement,"
                + "path text,"
                + "woman text," + "man text" + ");");
    }

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

    }
}

将数据添加到数据库:

 Resources res = this.getResources();
    ContentValues values = new ContentValues();

    XmlResourceParser _xml = res.getXml(R.xml.cardslist);
    try {

        int eventType = _xml.getEventType();
        while (eventType != XmlPullParser.END_DOCUMENT) {

            if ((eventType == XmlPullParser.START_TAG)
                    && (_xml.getName().equals("record"))) {

                String path = _xml.getAttributeValue(0);
                String woman = _xml.getAttributeValue(1);
                String man = _xml.getAttributeValue(2);
                values.put("path", path);
                values.put("woman", woman);
                values.put("man", man);
                db.insert("mytable", null, values);
                Log.d(LOG_TAG, "success");
            }
            eventType = _xml.next();
        }
    }
    // Catch errors
    catch (XmlPullParserException e) {
        Log.e("Test", e.getMessage(), e);
    } catch (IOException e) {
        Log.e("Test", e.getMessage(), e);

    } finally {
        // Close the xml file
        _xml.close();
    }



    dbHelper.close();
}

日志错误:

E/SQLiteLog: (1) table mytable has no column named man
E/SQLiteDatabase: Error inserting path=dwd woman=R.mipmap.ot2 man=rewr
                  android.database.sqlite.SQLiteException: table mytable has no column named man (code 1): , while compiling: INSERT INTO mytable(path,woman,man) VALUES (?,?,?)

2 个答案:

答案 0 :(得分:0)

  • 添加 CREATE TABLE IF NOT EXISTS
  • 删除多个 ;

尝试这种方式,只需纠正你的execSQL陈述。

 String sqlStatement = "CREATE TABLE IF NOT EXISTS mytable( id INTEGER PRIMARY KEY AUTOINCREMENT, path TEXT, woman TEXT, man TEXT)";
  db.execSQL(sqlStatement);

注意

如果出现同样的问题,则需要修改

   @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
  // ALTER TABLE LOGIC
    }

答案 1 :(得分:0)

您必须卸载您的应用,然后重新安装,因为probabelly您更改了数据库架构,并且在onUpgrade中您没有增加版本号,请查看this link以了解相关内容在更改架构时要执行的操作