android ormlite 登录注册的例子
ormlite的资料真少，网上很难找，就干脆自己看些api，以前以为这些api什马的很难，看下来之后觉得也不怎么困难。找了些操作数据库的类的用法，所以做了一个登录注册的小例子。
首先是登录相关的类
package com.cng;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import com.cng.dao.UsersDao;
import com.cng.model.UsersEntity;
import com.cng.utils.DataHelper;
import com.j256.ormlite.android.apptools.OrmLiteBaseActivity;
import com.j256.ormlite.dao.Dao;
import android.R.integer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class OrmliteLoginDemoActivity extends OrmLiteBaseActivity<DataHelper> {
private EditText username;
private EditText password;
private Button submit;
private Button register;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initView();
handlerbtn();
}
public void initView()
{
username=(EditText)findViewById(R.id.username);
password=(EditText)findViewById(R.id.password);
submit=(Button)findViewById(R.id.submit);
register=(Button)findViewById(R.id.register);
}
public void handlerbtn()
{
submit.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
String usernameString=username.getText().toString();
String passwordString=password.getText().toString();
UsersDao usersDao=new UsersDao();
List<UsersEntity> userlist=new ArrayList<UsersEntity>();
try
{
Dao<UsersEntity, Integer> userDao=getHelper().getUserDataDao();
userlist=usersDao.findUser(userDao,usernameString, passwordString);
} catch (SQLException e)
{
e.printStackTrace();
}
if(userlist==null||userlist.size()<=0)
{
alert("用户名或密码错误");
}
else
{
alert("欢迎登录");
Intent intent =new Intent();
intent.setClass(OrmliteLoginDemoActivity.this, welcom.class);
startActivity(intent);
}
}
});
register.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
Intent intent =new Intent();
intent.setClass(OrmliteLoginDemoActivity.this, register.class);
startActivity(intent);
}
});
}
public void alert(String str)
{
Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
}
}
然后是注册的
package com.cng;
import java.sql.SQLException;
import java.util.List;
import com.cng.dao.UsersDao;
import com.cng.model.UsersEntity;
import com.cng.utils.DataHelper;
import com.j256.ormlite.android.apptools.OrmLiteBaseActivity;
import com.j256.ormlite.dao.Dao;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class register extends OrmLiteBaseActivity<DataHelper>
{
private EditText register_username;
private EditText register_password;
private EditText register_repassword;
private Button register_btn;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
initview();
handlerbtn();
}
public void initview()
{
register_username=(EditText)findViewById(R.id.register_username);
register_password=(EditText)findViewById(R.id.register_password);
register_repassword=(EditText)findViewById(R.id.register_repassword);
register_btn=(Button)findViewById(R.id.register_btn);
}
public void handlerbtn()
{
register_btn.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
String usernameString=register_username.getText().toString();
String passwordString=register_password.getText().toString();
String repasswordString=register_repassword.getText().toString();
if(usernameString.equals(""))
{
register_username.setError("请输入用户名");
return;
}
if(passwordString.equals(""))
{
register_password.setError("请输入密码");
return;
}
if(repasswordString.equals(""))
{
register_repassword.setError("请重复密码");
return;
}
if(!repasswordString.equals(passwordString))
{
register_repassword.setError("重复密码与原密码不一致");
return;
}
UsersDao userDao=new UsersDao();
try
{
Dao<UsersEntity, Integer> userentitydao=getHelper().getUserDataDao();
List<UsersEntity> userlist=userDao.findUser(userentitydao, usernameString);
if(userlist==null||userlist.size()<=0)
{
userDao.addsuer(userentitydao, usernameString, passwordString);
alert("注册成功");
}
else
{
alert("此账户已经被注册");
register_username.setText("");
}
} catch (SQLException e)
{
e.printStackTrace();
}
}
});
}
public void alert(String str)
{
Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
}
}
最后欢迎界面
package com.cng;
import android.app.Activity;
import android.os.Bundle;
public class welcom extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.welcom);
}
}
再是数据库映射的实体类
package com.cng.model;
import java.io.Serializable;
import com.j256.ormlite.field.DatabaseField;
import android.R.integer;
public class UsersEntity implements Serializable
{
private static final long serialVersionUID = -6582623980712135028L;
@DatabaseField(generatedId=true)
private int id;
@DatabaseField
private String username;
@DatabaseField
private String password;
public UsersEntity(){}
public UsersEntity(int id, String username, String password)
{
super();
this.id = id;
this.username = username;
this.password = password;
}
public int getId()
{
return id;
}
public String getPassword()
{
return password;
}
public String getUsername()
{
return username;
}
public void setId(int id)
{
this.id = id;
}
public void setPassword(String password)
{
this.password = password;
}
public void setUsername(String username)
{
this.username = username;
}
}
再是操作数据库的类，我按照mvc的模式把操作数据库的类单独分离开了
package com.cng.dao;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.cng.model.UsersEntity;
import com.j256.ormlite.dao.Dao;
public class UsersDao
{
public List<UsersEntity> findUser(Dao<UsersEntity, Integer> userdao,String username,String password) throws SQLException
{
Dao<UsersEntity, Integer> userDao = userdao;
Map<String, Object> userMap=new HashMap<String, Object>();
userMap.put("username", username);
userMap.put("password", password);
List<UsersEntity> userlistEntities=userDao.queryForFieldValues(userMap);
return userlistEntities==null?null:userlistEntities;
}
public List<UsersEntity> findUser(Dao<UsersEntity, Integer> userdao,String username) throws SQLException
{
Dao<UsersEntity, Integer> userDao = userdao;
Map<String, Object> userMap=new HashMap<String, Object>();
userMap.put("username", username);
List<UsersEntity> userlistEntities=userDao.queryForFieldValues(userMap);
return userlistEntities==null?null:userlistEntities;
}
public void addsuer(Dao<UsersEntity, Integer> userdao,String username,String password) throws SQLException
{
Dao<UsersEntity, Integer> userDao = userdao;
UsersEntity usersEntity=new UsersEntity();
usersEntity.setUsername(username);
usersEntity.setPassword(password);
userDao.create(usersEntity);
}
}
最后是数据库管理类
package com.cng.utils;
import java.sql.SQLException;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import com.cng.model.UsersEntity;
import com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper;
import com.j256.ormlite.dao.Dao;
import com.j256.ormlite.support.ConnectionSource;
import com.j256.ormlite.table.TableUtils;
public class DataHelper extends OrmLiteSqliteOpenHelper
{
private static final String DATABASE_NAME = "OrmliteLoginDemo.db";
private static final int DATABASE_VERSION = 1;
private Dao<UsersEntity, Integer> userDao = null;
public DataHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db, ConnectionSource connectionSource)
{
try
{
TableUtils.createTable(connectionSource, UsersEntity.class);
} catch (SQLException e)
{
Log.e(DataHelper.class.getName(), "创建数据库失败", e);
e.printStackTrace();
}
}
@Override
public void onUpgrade(SQLiteDatabase db, ConnectionSource connectionSource,
int arg2, int arg3)
{
try
{
TableUtils.dropTable(connectionSource, UsersEntity.class, true);
onCreate(db, connectionSource);
} catch (SQLException e)
{
Log.e(DataHelper.class.getName(), "更新数据库失败", e);
e.printStackTrace();
}
}
@Override
public void close()
{
super.close();
userDao = null;
}
public Dao<UsersEntity, Integer> getUserDataDao() throws SQLException
{
if (userDao == null)
{
userDao = getDao(UsersEntity.class);
}
return userDao;
}
}
布局代码如下
<?xml version="1.0" encoding="utf-8" ?> - <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> - <LinearLayout android:layout_marginTop="80dp" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <TextView android:layout_marginLeft="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="用户名" /> <EditText android:id="@+id/username" android:layout_marginLeft="10dp" android:layout_width="200dp" android:layout_height="wrap_content" android:hint="请输入用户名" /> </LinearLayout> - <LinearLayout android:layout_marginTop="10dp" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <TextView android:layout_marginLeft="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="密码 " /> <EditText android:id="@+id/password" android:layout_marginLeft="10dp" android:layout_width="200dp" android:layout_height="wrap_content" android:hint="请输入密码" /> </LinearLayout> - <LinearLayout android:layout_marginTop="10dp" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <Button android:id="@+id/submit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="登录" /> <Button android:id="@+id/register" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="注册" /> </LinearLayout> </LinearLayout>
<?xml version="1.0" encoding="utf-8" ?> - <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> - <LinearLayout android:layout_marginTop="80dp" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <TextView android:layout_marginLeft="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="用户名 " /> <EditText android:id="@+id/register_username" android:layout_marginLeft="10dp" android:layout_width="200dp" android:layout_height="wrap_content" android:hint="请输入用户名" /> </LinearLayout> - <LinearLayout android:layout_marginTop="10dp" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <TextView android:layout_marginLeft="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="密码 " /> <EditText android:id="@+id/register_password" android:layout_marginLeft="10dp" android:layout_width="200dp" android:layout_height="wrap_content" android:hint="请输入密码" /> </LinearLayout> - <LinearLayout android:layout_marginTop="10dp" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <TextView android:layout_marginLeft="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="重复密码" /> <EditText android:id="@+id/register_repassword" android:layout_marginLeft="10dp" android:layout_width="200dp" android:layout_height="wrap_content" android:hint="重复密码" /> </LinearLayout> - <LinearLayout android:layout_marginTop="10dp" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <Button android:id="@+id/register_btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="注册" /> </LinearLayout> </LinearLayout>
<?xml version="1.0" encoding="utf-8" ?> - <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:layout_marginLeft="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="欢迎登录" /> </LinearLayout>
当然工程里要加入ormlite的基础类包。
这样基于ormlite的登录注册的小例子就完成了。