Android数据库相关代码解读之 SQLLite

核心提示：} catch (Exception e) {Log.v(TAG, "insert Table TestUser 1 record fail");return false;} finally {//this.db.close();Log.v(TAG, "insert Table TestU

} catch (Exception e) {

Log.v(TAG, "insert Table TestUser 1 record fail");

return false;

} finally {

//this.db.close();

Log.v(TAG, "insert Table TestUser ");

}

}

public Cursor loadAll() {

Cursor cur = db.query("TestUser", new String[]

{ "ID", "NAME","SEX","AGES"}, null,

null, null, null, null);

return cur;

}

public void open(Context context){

if (null == db || !this.db.isOpen()){

this.context = context;

this.db = context.openOrCreateDatabase(this.DataBaseName,

context.MODE_PRIVATE, null);

createTabel();

Log.v(this.TAG, "create or Open DataBase。。。");

}

}

public void close() {

db.close();

}

}

package com.topsun;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.util.Log;

public class DBHelper {

private static final String TAG = "UserDB_DBHelper.java";

private static final String DataBaseName = "UserDB";

SQLiteDatabase db;

Context context;

public DBHelper(Context context) {

this.open(context);

}

private void createTabel() {

// TODO Auto-generated method stub

String sql = "";

try {

sql = "CREATE TABLE IF NOT EXISTS TestUser

(ID INTEGER PRIMARY KEY autoincrement,

NAME TEXT, SEX TEXT, AGES INTEGER)";

this.db.execSQL(sql);

Log.v(TAG, "Create Table TestUser ok");

} catch (Exception e) {

Log.v(TAG, "Create Table TestUser fail");

} finally {

//this.db.close();

Log.v(TAG, "Create Table TestUser ");