Question

我想删除“TYPE = 0”记录，我的代码：

cv.put(Call.NAME, titleString);
cv.put(Call.BUILD_NAME, "");
cv.put(Call.BUILD, build);
cv.put(Call.UNIT, unit);
cv.put(Call.ROOM, room);
cv.put(Call.TIME, date);
cv.put(Call.TYPE, 0);// 
cv.put(Call.DEVICETYPE, doordevicetype);
cv.put(Call.PHOTO, baos.toByteArray());
cv.put(Call.CONTACT_ID, 9999);

Uri contactUri, uriRet;
ContentResolver resolver = getContentResolver();
uriRet = resolver.insert(contactUri, cv);

所以我可以插入很多记录，一些记录Call.TYPE=0，一些Call.TYPE=1，所以我想删除所有Call.TYPE=1。我的代码：

int a=getContentResolver().delete(Call.CONTENT_URI,  Call.TYPE +"=" +1, null);

但应用删除了所有记录，包括Call.TYPE=0。我不知道出了什么问题。添加，插入，更新记录一切正常，但删除一些reocrds没有效果，请问一些建议吗？

Answer 1

在匹配TYPE = 1 ...

时使用此代码删除特定行

 String[] selectionArgs=new String[]{String.valueOf(1)};
 // this is for which argument to match   with TYPE=1 and delete row

 String selection=""+TablenName.TYPE+"=?"; //  this is where condition 
 getContentResolver().delete( Call.CONTENT_URI, selection, selectionArgs);

 Note : just refer this [link][1]. its usefull to understand for , how delete are happening..
 [1]: http://www.w3schools.com/sql/sql_delete.asp

getContentResolver（）。删除过滤器不起作用

1 个答案: