我在包含已存在的数据的数据库中遇到问题,但数据未出现在文本框中。请帮忙
这是来自Form.java的数据
String modul;
String itemreg;
modul = dataSource.getModule(assignmentid,orderid,productmoduleid,productdetailid);
//itemreg = dataSource.getItemreg(productmoduleid, productdetailid);
if(Globals.modul==null){
Globals.modul=modul;
}
String namamodul;
namamodul=dataSource.getModul1(productmoduleid);
edModul.setText(namamodul);
这是dbdatasource.java
public String getModule(String assignmentid, String orderid, String productmoduleid, String productdetailid){
Cursor cursor = database.query(DBHelper.ASSIGNMENT_ORDER_DETAIL,allAssignemntOrderDetail, DBHelper.ASSIGNMENT_ID +"= 'assgn1' and "+DBHelper.ORDER_ID +"= 'ord1'", null, null, null, null);
cursor.moveToFirst();
AssignmentOrderDetail = cursor.getString(cursor.getColumnIndex(DBHelper.PRODUCT_MODULE_ID));
cursor.close();
return AssignmentOrderDetail;
}
public String getModul1(String productmoduleid){
String productmodul ;
Cursor cursor = database.query(DBHelper.PRODUCT_MODULE,allProductModule, DBHelper.PRODUCT_MODULE_ID +"='"+Globals.modul+"'", null, null, null, null);
cursor.moveToFirst();
productmodul = cursor.getString(cursor.getColumnIndex(DBHelper.PRODUCT_MODULE_DESC));
cursor.close();
return productmodul;
}
答案 0 :(得分:0)
尝试使用以下代码:
Cursor cursor = null;
String TABLE_NAME = "yourTableName";
String[] allColumns = {"coloumn1","coloumn2","coloumn3"};
String whereClause = "coloumn1"+"=?";
String[] whereArgs = new String[] {method_parameter};
如下所示:
private Cursor getData(String param_id)
{
try{
sqliteDb = appDb.getWritableDatabase();
if(sqliteDb.isOpen())
{
cursor = sqliteDb.query(TABLE_NAME, whereClause, whereArgs);
}
}catch(Exception ex)
{
b = false;
ex.printStackTrace();
}
return cursor;
}
答案 1 :(得分:0)
尝试这可能会有所帮助:
try{
Cursor cursor =
database.query(DBHelper.ASSIGNMENT_ORDER_DETAIL,allAssignemntOrderDetail,
DBHelper.ASSIGNMENT_ID +"= 'assgn1' and "+DBHelper.ORDER_ID +"= 'ord1'",
null, null, null, null);
if(cursor != null) {
cursor.moveToFirst();
AssignmentOrderDetail =
cursor.getString(cursor.getColumnIndex(DBHelper.PRODUCT_MODULE_ID));
}
return AssignmentOrderDetail;
}finally {
cursor.close();
}