android中SQLite数据库的删除与更新
我正在删除和更新SQLite数据库,但删除和更新后,数据库记录中不会发生更改 更新功能:android中SQLite数据库的删除与更新,android,sqlite,Android,Sqlite,我正在删除和更新SQLite数据库,但删除和更新后,数据库记录中不会发生更改 更新功能: public void update(int iD, String name, String gender, String date,String branch, String mob, String email, String address) { // TODO Auto-generated method stub String [] para = new String[
public void update(int iD, String name, String gender, String date,String branch, String mob, String email, String address) {
// TODO Auto-generated method stub
String [] para = new String[7];
para[0]= name; para[1]=gender; para[2]=date; para[3]=branch; para[4]=mob; para[5]=email; para[6]=address;
db.execSQL("UPDATE stud SET Name=?,Gender=?,DOB=?,Branch=?,Mobile=?,EmailId=?,Address=? WHERE _id="+iD+"",para);
System.out.println("data updated....");
}
public void deleteData(int id) {
// TODO Auto-generated method stub
System.out.println("in del");
db.execSQL("DELETE FROM stud WHERE _id='"+id+"'");
System.out.println("data deleted...");
}
删除功能:
public void update(int iD, String name, String gender, String date,String branch, String mob, String email, String address) {
// TODO Auto-generated method stub
String [] para = new String[7];
para[0]= name; para[1]=gender; para[2]=date; para[3]=branch; para[4]=mob; para[5]=email; para[6]=address;
db.execSQL("UPDATE stud SET Name=?,Gender=?,DOB=?,Branch=?,Mobile=?,EmailId=?,Address=? WHERE _id="+iD+"",para);
System.out.println("data updated....");
}
public void deleteData(int id) {
// TODO Auto-generated method stub
System.out.println("in del");
db.execSQL("DELETE FROM stud WHERE _id='"+id+"'");
System.out.println("data deleted...");
}
执行查询后的语句。
db是SQLite数据库变量。调用
yourcursor.requery()代码>当您使用cursoradapter在listview中列出数据库时,操作完成后。日志中有错误吗?否…删除n次更新操作后,我正在显示数据…它按原样显示,您在哪里显示?如果在listview中,那么您是否调用了notifyDataSetChanged()
?如何执行此操作?我正在使用tableDebug显示数据以检查应用程序是否确实没有更改。或者使用Log.d()