android sqlite 建增刪改查

1、繼承sqliteopenhelper類

public

class
myopenhelper
extends
sqliteopenhelper 
@override
public
void
oncreate(sqlitedatabase db) 
@override
public
void
onupgrade(sqlitedatabase arg0, int arg1, int arg2) 
}

myopenhelper oh=new myopenhelper(getcontext());

sqlitedatabase db=oh.getwritabledatabase();

（1）插入

public

void
insertdatebase()

api插入

contentvalues cv=new contentvalues();
cv.put("name", "ppa");
cv.put("money", 16000);
long id = db.insert("person", null, cv);

public

void
updatedatabase());
}

api更新

contentvalues cv=new contentvalues();
cv.put("money", 16005);
int num = db.update("person", cv, "name=?", new
string);

public

void
deletedatabase()

api刪除

int num = db.delete("person", "name=?", new string);

public void select() );

while (cursor.movetonext()) 
}

api查詢

cursor cursor = db.query("person", new
string, "name=?", new
string, null, null, null);

1、繼承sqliteopenhelper類

public class myopenhelper extends sqliteopenhelper 
@override
public void oncreate(sqlitedatabase db) 
@override
public void onupgrade(sqlitedatabase arg0, int arg1, int arg2) }1
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2、獲取資料庫例項
myopenhelper oh=new myopenhelper(getcontext());
sqlitedatabase db=oh.getwritabledatabase();12
3、資料庫增刪查改操作 
（1）插入
public void insertdatebase()12
3456
api插入
contentvalues cv=new contentvalues();
cv.put("name", "ppa");
cv.put("money", 16000);
long id = db.insert("person", null, cv);12
345（2）更新
public void updatedatabase());
}1234
5api更新
contentvalues cv=new contentvalues();
cv.put("money", 16005);
int num = db.update("person", cv, "name=?", new string);12
34（3）刪除
public void deletedatabase()12
3456
api刪除
int num = db.delete("person", "name=?", new string);12
(4)查詢
public void select() );
while (cursor.movetonext()) 
}123456
78910
11api查詢
cursor cursor = db.query("person", new string, "name=?", new string, null, null, null);
12

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