Question

我正在尝试在我的sqlite数据库中插入日期选择器和时间选择器中的值。我已将日期和时间存储在对象变量中，然后在我的DBhandler类中调用一个方法，以通过contentvalue对象插入它们。

现在我失败的地方是实际的插入和数据类型。

我在'timeApp'和'dateApp'的以下代码中收到错误我将这些变量作为DATE和TIME变量传递给createAppointmentEntry'方法。：

错误讯息：

 The method put(String, String) in the type ContentValues is not applicable for the arguments (String, Time)

发生错误的方法：

public void createAppointmentEntry(String nameApp, String typeApp, Time timeApp, Date dateApp ,String commentApp, Boolean onOrOff) {



        ContentValues cv = new ContentValues();
        cv.put(KEY_NAMEAPP, nameApp);
        cv.put(KEY_TYPEAPP, typeApp);

                    //ERROR on the following two 'puts'
        cv.put(KEY_TIMEAPP, timeApp);
        cv.put(KEY_DATEAPP, dateApp);

        cv.put(KEY_COMMENTAPP, commentApp);
        cv.put(KEY_ALARM, onOrOff);
        ourDatabase.insert(DATABASE_TABLE, null, cv);

继承我的数据库专栏：

    public static final String KEY_ROWAPPID = "_appid";
public static final String KEY_NAMEAPP = "app_name";
public static final String KEY_TYPEAPP = "app_type";
public static final String KEY_TIMEAPP = "app_time";
public static final String KEY_DATEAPP = "app_date";
public static final String KEY_COMMENTAPP = "app_comments";
public static final String KEY_ALARM = "app_alarm";

我的onCreate方法：

db.execSQL("CREATE TABLE " + DATABASE_TABLEAPP + " (" +
            KEY_ROWAPPID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                KEY_NAMEAPP + " TEXT NOT NULL, " +
                KEY_TYPEAPP + " TEXT NOT NULL, " +
                KEY_TIMEAPP + " TEXT NOT NULL, " +
                KEY_DATEAPP + " TEXT NOT NULL, " +
                KEY_COMMENTAPP + " TEXT NOT NULL, " +
                KEY_ALARM + "BOOLEAN NOT NULL);"

                );

以下是我如何设置时间和日期对象变量：

    Date setDate = new Date(dobYear - 1900, dobMonth, dobDate);


Time timeToSet = new Time();
timeToSet.set(0, dobMinute, dobHour);

Answer 1

从编译错误和ContentValues的API来看，似乎ContentValues仅支持原始类型String和byte[]。所以，尝试替换：

//ERROR on the following two 'puts'
 cv.put(KEY_TIMEAPP, timeApp);
 cv.put(KEY_DATEAPP, dateApp);

使用：

 cv.put(KEY_TIMEAPP, timeApp.toString());
 cv.put(KEY_DATEAPP, dateApp.toString());

您可以使用格式化工具将Time和Date格式化为标准String，以便能够将其解析回来。

Answer 2

我猜想但是我不确定 KEY_ALARM + "BOOLEAN NOT NULL);" 你错过了创建声明的空白。尝试删除它并使用空格重新创建它。

db.execSQL("CREATE TABLE " + DATABASE_TABLEAPP + " (" +
            KEY_ROWAPPID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                KEY_NAMEAPP + " TEXT NOT NULL, " +
                KEY_TYPEAPP + " TEXT NOT NULL, " +
                KEY_TIMEAPP + " TEXT NOT NULL, " +
                KEY_DATEAPP + " TEXT NOT NULL, " +
                KEY_COMMENTAPP + " TEXT NOT NULL, " +
                KEY_ALARM + " BOOLEAN NOT NULL);"

KEY_ALARM + " BOOLEAN NOT NULL);" 昨天做了同样的错误。如果您写了一个Helperclass，只需更改DATABASE_VERSION Else，拨打db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLEAPP); Helper类会将其称为例如

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    Log.w(MySQLiteHelper.class.getName(),
            "Upgrading database from version " + oldVersion + " to "
                    + newVersion + ", which will destroy all old data");
    db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLEAPP);
    onCreate(db); //recreate 
}

使用新语句自动重新创建数据库。

插入日期和时间

2 个答案: