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我觉得真的愚蠢的甚至问这个问题,可能是愚蠢的问,因为我认为答案是“它永远不应该那样做”,但我非常卡在这目前的问题我在,所以我想问无论如何。有时阵列不是从多个线程添加项目
我有一个数组类,我创建...
public class Search_Results_Item {
private String SortSearchSite;
private String SortSearchLocation;
private String SortTitle;
private String SortLinkURL;
private String SortImageSRC;
private String SortPrice;
private String SortDescription;
private String SortLocation;
private String SortDateTime;
private String SortTrueDateTime;
private String SortOriginalURL;
public Search_Results_Item(String SortSearchSite, String SortSearchLocation, String SortTitle, String SortLinkURL, String SortImageSRC,
String SortPrice, String SortDescription, String SortLocation, String SortDateTime, String SortTrueDateTime, String SortOriginalURL) {
this.SortSearchSite = SortSearchSite;
this.SortSearchLocation = SortSearchLocation;
this.SortTitle = SortTitle;
this.SortLinkURL = SortLinkURL;
this.SortImageSRC = SortImageSRC;
this.SortPrice = SortPrice;
this.SortDescription = SortDescription;
this.SortLocation = SortLocation;
this.SortDateTime = SortDateTime;
this.SortTrueDateTime = SortTrueDateTime;
this.SortOriginalURL = SortOriginalURL;
}
我把它做我的方法...
private ArrayList<Search_Results_Item> SearchResultsRow = new ArrayList<Search_Results_Item>();
我从2个不同的线程是项目添加到这个开始在同一时间使用..
SearchResultsRow.add(new Search_Results_Item(sSite, sLocation, SortTitle, SortLinkURL, SortImageSRC, SortPrice, SortDescription, SortLocation,
SortDateTime, EPOCHDATETIME, sBaseURL));
然后,我有一个runnable,不断运行,它这样做...
getWriteDB();
Sql_Database_Globals.SQL_DATABASE.beginTransaction();
while (SearchResultsRow.size() > 0) {
int theMax = SearchResultsRow.size() - 1;
SQLCOUNT++;
Search_Results_Item ITEM = SearchResultsRow.get(theMax);
SearchResultsRow.remove(ITEM);
try {
if (ITEM != null) {
SQLiteStatement statement = Sql_Database_Globals.SQL_DATABASE
.compileStatement("INSERT INTO TEMPSORT (SortSearchSite, SortSearchLocation, SortTitle, SortLinkURL, SortImageSRC, SortPrice, SortDescription, SortLocation, SortDateTime, SortTrueDateTime, SortOriginalURL) VALUES (?,?,?,?,?,?,?,?,?,?,?)");
statement.clearBindings();
statement.bindString(1, ITEM.getSortSearchSite());
statement.bindString(2, ITEM.getSortSearchLocation());
statement.bindString(3, ITEM.getSortTitle());
statement.bindString(4, ITEM.getSortLinkURL());
statement.bindString(5, ITEM.getSortImageSRC());
statement.bindString(6, ITEM.getSortPrice());
statement.bindString(7, ITEM.getSortDescription());
statement.bindString(8, ITEM.getSortLocation());
statement.bindString(9, ITEM.getSortDateTime());
statement.bindString(10, ITEM.getSortTrueDateTime());
statement.bindString(11, ITEM.getSortOriginalURL());
statement.executeInsert();
} else {
Log.d("EXCEPTION", "----------->NULL");
}
} catch(Exception e1){
// catch all the exceptions
Log.d("SQLEXCEPTION", "SQL - > " + e1.getMessage());
}
}
Sql_Database_Globals.SQL_DATABASE.setTransactionSuccessful();
Sql_Database_Globals.SQL_DATABASE.endTransaction();
SQLDB.close();
现在为了一些奇怪的原因。有时会有一些项目被假设添加到SearchResults中(并且计数之前和之后确认它被添加)实际上不会被查看并试图插入到SQLDatabase中(这正是SQLCOUNT ++的功能) 。有时候它只有1条记录,有时候它会记录所有记录的时间的3.90%。
我不能为了我的生活开始明白我失踪了。
尝试将'SearchResultsRow'设置为volatile。请你详细说明一下 – 2015-03-31 04:03:45
。 – eqiz 2015-03-31 04:04:55
如果它是一个arraylist,那么这样做:'volatile ArrayList SearchResultsRow;' –
2015-03-31 04:06:30