Android 深入研究SQLite实例（六）

petrel919

　　


public void delete(Integer... ids){
if(ids.length>0){
StringBuilder sb = new StringBuilder();
String[] strIds = new String[ids.length];
for(int i=0 ; i < ids.length ; i++){
sb.append('?').append(',');
strIds = String.valueOf(ids);
}
sb.deleteCharAt(sb.length()-1);
SQLiteDatabase database = dbmanger.getWritableDatabase();
//参数 表名 指定条件 条件占位值
database.delete("person", "personid in("+ sb + ")", strIds);
}
}
public List getScrollData(int startResult, int maxResult){
List persons = new ArrayList();
SQLiteDatabase database = dbmanger.getWritableDatabase();
//参数 表名 返回字段 指定条件 指定条件映射值 是否分组 分组条件 是否排序 分页条件
Cursor cursor = database.query("person", new String[]{"personid", "name", "age"},null, null, null, null, "personid desc", startResult+ ","+ maxResult);
while(cursor.moveToNext()){
persons.add(new Person(cursor.getInt(0), cursor.getString(1), cursor.getShort(2)));
}
return persons;
}
public long getCount(){
SQLiteDatabase database = dbmanger.getWritableDatabase();
Cursor cursor = database.query("person", new String[]{"count(*)"}, null, null, null, null, null);
if(cursor.moveToNext()){
return cursor.getLong(0);
}
return 0;
}
}测试类代码
package eoe.demo;
import java.util.List;
import it.bean.Person;
import it.service.PersonService;
import android.test.AndroidTestCase;
import android.util.Log;
/**
*
* 执行PersonService的测试
*
*/
public class PersonServiceTest extends AndroidTestCase {
private static final String tag="PersonServiceTest";
public void testsave()throws Exception{
PersonService personservice=new PersonService(this.getContext());
for(int i=0;i<10;i++){
personservice.save(new Person("huhuanhuan",(short)33));
}
}

public void testfindbyid(){
PersonService personservice=new PersonService(this.getContext());
Person p=personservice.findbyid(1);
Log.i(tag,p.toString());
}
public void testupdate(){
Person person=new Person(1,"chun",(short)20);
PersonService personservice=new PersonService(this.getContext());
personservice.update(person);
Person p=personservice.findbyid(1);
Log.i(tag,p.toString());
}
public void testgetdatePerson(){
Person p=new Person();
PersonService personservice=new PersonService(this.getContext());
List list=personservice.getdatePerson(0, 10);
for(int i=0;i< p>
p=(Person)list.get(i);
Log.i(tag,p.toString());
}
}
public void testgetcount(){
PersonService personservice=new PersonService(this.getContext());
long l=personservice.getcount();
Log.i(tag, String.valueOf(l));
}
public void testdelete(){
PersonService personservice=new PersonService(this.getContext());
personservice.delete(1,2,3);
}
}