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android - 如何使用 SQLiteStatement 向 Sqlite 插入空值

我尝试保存到SqliteEventpublicclassEventDao{privateSQLiteStatementinsertStatement;privateSQLiteDatabasedb;privatestaticfinalStringINSERT="insertinto"+EventsTable.TABLE_NAME+"("+EventsColumns.WHO+","+EventsColumns.WHAT+")values(?,?)";publicEventDao(SQLiteDatabasedb){this.db=db;Log.w(TAG,EventDao.INSERT)