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android ormlite 登录注册的例子

程序员文章站 2022-07-15 12:45:33
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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。