关于在表中插入值的SQLiteConstraintException

时间:2011-08-21 12:30:09

标签: android

我是Android开发新手,我有一个带有以下代码的android数据库表

公共类SoftCopyDatabase扩展了SQLiteOpenHelper {

private static final String DATABASE_NAME = "SoftCopy.db";
private static final int DATABASE_VERSION = 1;

public SoftCopyDatabase(Context ctx) {
    super(ctx, DATABASE_NAME, null, DATABASE_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL("CREATE TABLE " + TABLE_NAME + " (" + _ID
            + " INTEGER PRIMARY KEY AUTOINCREMENT, " + SUBJECT
            + " TEXT NOT NULL," + TOPIC + " TEXT NOT NULL, "
            + LECTURENUMBER + " TEXT NOT NULL, " + PAGENUMBER
            + " TEXT NOT NULL, " + DATE + " TEXT NOT NULL, " + _DATA
            + " TEXT NOT NULL);");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
    onCreate(db);
}} 

我正在尝试使用addInfo()方法添加到此表中,如下所示:

private void addInfo(){
    ContentValues values = new ContentValues();
    values.put(SUBJECT, SaveData._subject);
    values.put(TOPIC, SaveData._topic);
    values.put(LECTURENUMBER, SaveData._lecturenumber);
    values.put(PAGENUMBER, Integer.toString(PAGE_NUMBER));
    values.put(DATE, SaveData._date);
    values.put(_DATA, SaveData.FILE_NAME + ".png");
    softCopyDB.getWritableDatabase().insertOrThrow(TABLE_NAME, null, values);

}

但是当我增加PAGE_NUMBER的值(Page_NUMBER是一个整数)同时保持所有其他条目相同并调用addInfo()时,我收到错误  softCopyDB.getWritableDatabase()。insertOrThrow(TABLE_NAME,null,values);

如下

08-21 18:16:11.216:ERROR / AndroidRuntime(329):引起:android.database.sqlite.SQLiteConstraintException:错误代码19:约束失败 08-21 18:16:11.216:ERROR / AndroidRuntime(329):在android.database.sqlite.SQLiteStatement.native_execute(Native方法) 08-21 18:16:11.216:ERROR / AndroidRuntime(329):在android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:55) 08-21 18:16:11.216:ERROR / AndroidRuntime(329):在android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1549) 08-21 18:16:11.216:ERROR / AndroidRuntime(329):在android.database.sqlite.SQLiteDatabase.insertOrThrow(SQLiteDatabase.java:1432) 08-21 18:16:11.216:ERROR / AndroidRuntime(329):at neduet.telecom.softcopy.surface.LectureNoting.addInfo(LectureNoting.java:161)

请帮我整理一下。

1 个答案:

答案 0 :(得分:0)

我能看到的唯一限制是PK和NOT NULL。由于_ID不是插入的一部分,我会检查您的文本值为null。