Bmob移动后端云服务平台--Android从零开始--(三)Bmob数据操作((批量)增删改)

末蓝、 2022-08-06 04:18 341阅读 0赞

# Bmob移动后端云服务平台--Android从零开始--(三)Bmob数据操作((批量)增删改) #

上篇文章简单的利用Bmob实现了用户注册与登录效果([http://blog.csdn.net/a123demi/article/details/42059621][http_blog.csdn.net_a123demi_article_details_42059621])。

在项目中，对数据的操作脱离不了增删改查。Bmob其实也一样，他对数据操作的增删改查做了很好的封装，以及其批量的处理。本文将重点讲解利用Bmob实现Android端与Bmob服务端的数据操作，实现增加、修改、删除以及他们的批量处理。

源码路径：[http://download.csdn.net/detail/a123demi/8296591][http_download.csdn.net_detail_a123demi_8296591]

代码执行效果：

![20141224225055189][]

具体内容如下：

## 一、准备工作：定义继承于BmobObject的实体类 ##

在进行数据操作之前，首先我们得定义一个继承于BmobObject的实体。因为Bmob基本上是通过这个实体来对数据进行增删改查的操作。本文将建立一个关于用户信息的实体类，如下：UserBean.java

package com.example.bmobdatademo.bean;
 
 import cn.bmob.v3.BmobObject;
 
 /**
 * 用户信息实体类
 * @author 
 *
 */
 public class UserBean extends BmobObject {
 	private static final long serialVersionUID = 762796567708784658L;
 	
 	private String userId;
 	private String password;
 	private String userName;
 	public String getUserId() {
 		return userId;
 	}
 	public void setUserId(String userId) {
 		this.userId = userId;
 	}
 	public String getPassword() {
 		return password;
 	}
 	public void setPassword(String password) {
 		this.password = password;
 	}
 	public String getUserName() {
 		return userName;
 	}
 	public void setUserName(String userName) {
 		this.userName = userName;
 	}
 }

## 二、数据增加 ##

### 1.单个对象增加 ###

Bmob实现单个对象增加的方法其实很简单，就是利用BmobObject自带的save(Context context , SaveListener saveListener)方法

userBean.save(this, new SaveListener() {
 			
 			@Override
 			public void onSuccess() {
 				// TODO Auto-generated method stub
 				
 			}
 			
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				// TODO Auto-generated method stub
 				
 			}
 		});

### 2.批量增加 ###

Bmob对于批量增加的方法为insertBatch(Context context,List<BmobObject> list,SaveListener saveListener),

new BmobObject().insertBatch(this, userBeans, new SaveListener() {
 			
 			@Override
 			public void onSuccess() {
 				
 			}
 			
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				
 			}
 		});

注意：其中userBeans是对象BmobObject的集合

具体代码如下：

package com.example.bmobdatademo.ui;
 
 import java.util.ArrayList;
 import java.util.List;
 
 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 cn.bmob.v3.BmobObject;
 import cn.bmob.v3.BmobQuery;
 import cn.bmob.v3.listener.FindListener;
 import cn.bmob.v3.listener.SaveListener;
 
 import com.example.bmobdatademo.R;
 import com.example.bmobdatademo.bean.UserBean;
 import com.example.bmobdatademo.utils.ToastUtil;
 
 public class AddActivity extends Activity {
 
 	private EditText userIdEt, userNameEt, passwordEt;
 	private Button addBtn, batchAddBtn,queryBtn;
 
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_data_add);
 		
 		initView();
 
 	}
 
 	private void initView() {
 		userIdEt = (EditText) this.findViewById(R.id.id_user_id_et);
 		userNameEt = (EditText) this.findViewById(R.id.id_user_name_et);
 		passwordEt = (EditText) this.findViewById(R.id.id_password_et);
 		addBtn = (Button) this.findViewById(R.id.id_add_btn);
 		batchAddBtn = (Button) this.findViewById(R.id.id_batch_btn);
 		queryBtn = (Button) this.findViewById(R.id.id_query_add_btn);
 
 		addBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				add();
 			}
 		});
 
 		batchAddBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				batchAdd();
 			}
 		});
 		
 		queryBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				query();
 			}
 		});
 
 	}
 
 	/**
 	 * 批量增加
 	 */
 	protected void batchAdd() {
 		List<BmobObject> userBeans = initUserBeans(5);
 
 		new BmobObject().insertBatch(this, userBeans, new SaveListener() {
 
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(AddActivity.this, "批量增加成功");
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(AddActivity.this, arg1 + "批量增加失败");
 			}
 		});
 
 	}
 
 	/**
 	 * 增加
 	 */
 	protected void add() {
 		UserBean userBean = (UserBean) initUserBeans(1).get(0);
 
 		userBean.save(this, new SaveListener() {
 
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(AddActivity.this, "增加成功");
 
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(AddActivity.this, arg1 + "增加失败");
 
 			}
 		});
 	}
 
 	/**
 	 * 初始化实体对象
 	 * 
 	 * @param count
 	 * @return
 	 */
 	private List<BmobObject> initUserBeans(int count) {
 		List<BmobObject> userBeans = new ArrayList<BmobObject>();
 		for (int i = 0; i < count; i++) {
 			UserBean userBean = new UserBean();
 			userBean.setUserId(userIdEt.getText().toString() + i);
 			userBean.setUserName(userNameEt.getText().toString() + i);
 			userBean.setPassword(passwordEt.getText().toString());
 
 			userBeans.add(userBean);
 		}
 		return userBeans;
 	}
 	
 
 	/**
 	 * 修改
 	 */
 	protected void query() {
 		BmobQuery<UserBean> query = new BmobQuery<>();
 
 		query.findObjects(this, new FindListener<UserBean>() {
 
 			@Override
 			public void onError(int arg0, String arg1) {
 				ToastUtil.toast(AddActivity.this, arg1 + "查询失败");
 				
 			}
 
 			@Override
 			public void onSuccess(List<UserBean> userBeanList) {
 				// TODO Auto-generated method stub
 				ToastUtil.toast(AddActivity.this, showMsg(userBeanList));
 				
 			}
 		});
 	}
 	
 	/**
 	 * 弹出提示
 	 * @param userBmobObjects
 	 * @return
 	 */
 	private String showMsg(List<UserBean> userBmobObjects){
 		String msg = "";
 		if(userBmobObjects.size() == 0){
 			msg = "数据不存在!";
 		}
 		for(UserBean userBean:userBmobObjects){
 			msg += userBean.getObjectId() + "," + userBean.getUserId() + "," + userBean.getUserName() + "," 
 					+ userBean.getPassword() + "\n";
 		}
 		return msg;
 	}
 }

## 三、 数据修改 ##

### 1.单个对象修改 ###

Bmob实现单个对象修改方法

update(Context context,UpdateListener updateListener)默认修改Bmob服务器第一行元素

update(Context context,String objectId,UpdateListener updateListener) 根据objectId修改指定元素

userBean.update(this,userBean.getObjectId(), new UpdateListener() {
 			
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(UpdateActivity.this, "修改成功");
 
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(UpdateActivity.this, arg1 + "修改失败");
 
 			}
 		});

### 2.批量修改 ###

bmob实现批量修改方法udpateBatch(Context context,List<BmobObject> list,UpdateListener updateListener)

new BmobObject().updateBatch(this, queryBeans, new UpdateListener() {
 
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(UpdateActivity.this, "批量修改成功");
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(UpdateActivity.this, arg1 + "批量修改失败");
 			}
 		});

修改具体代码：

package com.example.bmobdatademo.ui;
 
 import java.util.ArrayList;
 import java.util.List;
 
 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 cn.bmob.v3.BmobObject;
 import cn.bmob.v3.BmobQuery;
 import cn.bmob.v3.listener.FindListener;
 import cn.bmob.v3.listener.UpdateListener;
 
 import com.example.bmobdatademo.R;
 import com.example.bmobdatademo.bean.UserBean;
 import com.example.bmobdatademo.utils.ToastUtil;
 
 public class UpdateActivity extends Activity {
 
 	private EditText userIdEt, userNameEt, passwordEt;
 	private Button updateBtn, batchUpdateBtn,queryUpdateBtn;
 	
 	private List<BmobObject> queryBeans = new ArrayList<BmobObject>();
 
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_data_update);
 		
 		initView();
 
 	}
 
 	private void initView() {
 		userIdEt = (EditText) this.findViewById(R.id.id_user_id_update_et);
 		userNameEt = (EditText) this.findViewById(R.id.id_user_name_update_et);
 		passwordEt = (EditText) this.findViewById(R.id.id_password_update_et);
 		updateBtn = (Button) this.findViewById(R.id.id_update_btn);
 		queryUpdateBtn = (Button) this.findViewById(R.id.id_query_update_btn);
 		batchUpdateBtn = (Button) this.findViewById(R.id.id_batch_update_btn);
 
 		updateBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				update();
 			}
 		});
 
 		batchUpdateBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				batchUpdate();
 			}
 		});
 		
 		queryUpdateBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				query();
 			}
 		});
 
 	}
 
 	/**
 	 * 批量修改
 	 */
 	protected void batchUpdate() {
 		
 		if(queryBeans.size() == 0){
 			ToastUtil.toast(this, "数据不存在,请先插入");
 			return;}
 		
 		//修改数据
 		for(int i = 0; i < queryBeans.size(); i++){
 			UserBean userBean =(UserBean) queryBeans.get(i);
 			userBean.setUserId(userIdEt.getText().toString() + i);
 			userBean.setUserName(userNameEt.getText().toString() + i);
 			userBean.setPassword(passwordEt.getText().toString());
 		}
 		
 		new BmobObject().updateBatch(this, queryBeans, new UpdateListener() {
 
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(UpdateActivity.this, "批量修改成功");
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(UpdateActivity.this, arg1 + "批量修改失败");
 			}
 		});
 
 	}
 
 	/**
 	 * 修改
 	 */
 	protected void update() {
 		if(queryBeans.size() == 0){
 			ToastUtil.toast(this, "无数据，请先插入！");
 			return;
 		}
 		UserBean userBean = (UserBean)queryBeans.get(0);
 		
 		userBean.setUserId(userIdEt.getText().toString() + "33333");
 		userBean.setUserName(userNameEt.getText().toString());
 		userBean.setPassword(passwordEt.getText().toString());
 		
 		/**
 		 * 根据指定的objectId修改元素
 		 */
 		userBean.update(this,userBean.getObjectId(), new UpdateListener() {
 			
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(UpdateActivity.this, "修改成功");
 
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(UpdateActivity.this, arg1 + "修改失败");
 
 			}
 		});
 		
 		/**
 		 * 默认修改Bmob服务器第一行元素
 		 */
 //		userBean.update(this , new UpdateListener() {
 //			
 //			@Override
 //			public void onSuccess() {
 //				// TODO Auto-generated method stub
 //				ToastUtil.toast(UpdateActivity.this, "修改成功");
 //			}
 //			
 //			@Override
 //			public void onFailure(int arg0, String arg1) {
 //				// TODO Auto-generated method stub
 //				ToastUtil.toast(UpdateActivity.this, arg1 + "修改失败");
 //			}
 //		});
 	}
 	
 	/**
 	 * 修改
 	 */
 	protected void query() {
 		BmobQuery<UserBean> query = new BmobQuery<>();
 
 		query.findObjects(this, new FindListener<UserBean>() {
 
 			@Override
 			public void onError(int arg0, String arg1) {
 				ToastUtil.toast(UpdateActivity.this, arg1 + "查询失败");
 				
 			}
 
 			@Override
 			public void onSuccess(List<UserBean> userBeanList) {
 				// TODO Auto-generated method stub
 				ToastUtil.toast(UpdateActivity.this, showMsg(userBeanList));
 				convertUserToObject(userBeanList);
 				
 			}
 		});
 	}
 	
 	/**
 	 * 弹出提示
 	 * @param userBmobObjects
 	 * @return
 	 */
 	private String showMsg(List<UserBean> userBmobObjects){
 		String msg = "";
 		for(UserBean userBean:userBmobObjects){
 			msg += userBean.getObjectId() + "," + userBean.getUserId() + "," + userBean.getUserName() + "," 
 					+ userBean.getPassword() + "\n";
 		}
 		return msg;
 	}
 	
 	/**
 	 * 将子类集合转换为基类BmobObject集合
 	 * @param userBeanList
 	 * @return
 	 */
 	private List<BmobObject> convertUserToObject(List<UserBean> userBeanList){
 		queryBeans.clear();
 		for(UserBean userBean: userBeanList){
 			queryBeans.add(userBean);
 		}
 		
 		return queryBeans;
 	}
 
 }

## 四、数据删除 ##

### 1.单个对象删除 ###

Bmob实现单个对象删除方法

delete(Context context,DeleteListener deleteListener)默认删除Bmob服务器第一行元素

delete(Context context,String objectId,DeleteListenerdeleteListener) 根据objectId删除指定元素

userBean.delete(this,userBean.getObjectId(), new DeleteListener() {
 			
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(DeleteActivity.this, "删除成功");
 
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(DeleteActivity.this, arg1 + "删除失败");
 
 			}
 		});

### 2.批量删除 ###

bmob实现批量删除方法deleteBatch(Context context,List<BmobObject> list,DeleteListenerdeleteListener)

new BmobObject().deleteBatch(this, queryBeans, new DeleteListener() {
 
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(DeleteActivity.this, "批量删除成功");
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(DeleteActivity.this, arg1 + "批量删除失败");
 			}
 		});

删除的具体代码：

package com.example.bmobdatademo.ui;
 
 import java.util.ArrayList;
 import java.util.List;
 
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import cn.bmob.v3.BmobObject;
 import cn.bmob.v3.BmobQuery;
 import cn.bmob.v3.listener.DeleteListener;
 import cn.bmob.v3.listener.FindListener;
 
 import com.example.bmobdatademo.R;
 import com.example.bmobdatademo.bean.UserBean;
 import com.example.bmobdatademo.utils.ToastUtil;
 
 public class DeleteActivity extends Activity {
 
 	private Button deleteBtn, batchdeleteBtn,querydeleteBtn;
 	
 	private List<BmobObject> queryBeans = new ArrayList<BmobObject>();
 
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_data_delete);
 		
 		initView();
 
 	}
 
 	private void initView() {
 		deleteBtn = (Button) this.findViewById(R.id.id_delete_btn);
 		querydeleteBtn = (Button) this.findViewById(R.id.id_query_delete_btn);
 		batchdeleteBtn = (Button) this.findViewById(R.id.id_batch_delete_btn);
 
 		deleteBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				delete();
 			}
 		});
 
 		batchdeleteBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				batchDelete();
 			}
 		});
 		
 		querydeleteBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				query();
 			}
 		});
 
 	}
 
 	/**
 	 * 批量删除
 	 */
 	protected void batchDelete() {
 		
 		if(queryBeans.size() == 0){
 			ToastUtil.toast(this, "数据不存在,请先插入");
 			return;}
 		
 		
 		new BmobObject().deleteBatch(this, queryBeans, new DeleteListener() {
 
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(DeleteActivity.this, "批量删除成功");
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(DeleteActivity.this, arg1 + "批量删除失败");
 			}
 		});
 
 	}
 
 	/**
 	 * 删除
 	 */
 	protected void delete() {
 		if(queryBeans.size() == 0){
 			ToastUtil.toast(this, "无数据，请先插入！");
 			return;
 		}
 		UserBean userBean = (UserBean)queryBeans.get(0);
 		
 		/**
 		 * 根据指定的objectId修改元素
 		 */
 		userBean.delete(this,userBean.getObjectId(), new DeleteListener() {
 			
 			@Override
 			public void onSuccess() {
 				ToastUtil.toast(DeleteActivity.this, "删除成功");
 
 			}
 
 			@Override
 			public void onFailure(int arg0, String arg1) {
 				ToastUtil.toast(DeleteActivity.this, arg1 + "删除失败");
 
 			}
 		});
 		
 		/**
 		 * 默认删除Bmob服务器第一行元素
 		 */
 //		userBean.delete(this , new deleteListener() {
 //			
 //			@Override
 //			public void onSuccess() {
 //				// TODO Auto-generated method stub
 //				ToastUtil.toast(deleteActivity.this, "删除成功");
 //			}
 //			
 //			@Override
 //			public void onFailure(int arg0, String arg1) {
 //				// TODO Auto-generated method stub
 //				ToastUtil.toast(deleteActivity.this, arg1 + "删除失败");
 //			}
 //		});
 	}
 	
 	/**
 	 * 修改
 	 */
 	protected void query() {
 		BmobQuery<UserBean> query = new BmobQuery<>();
 
 		query.findObjects(this, new FindListener<UserBean>() {
 
 			@Override
 			public void onError(int arg0, String arg1) {
 				ToastUtil.toast(DeleteActivity.this, arg1 + "查询失败");
 				
 			}
 
 			@Override
 			public void onSuccess(List<UserBean> userBeanList) {
 				// TODO Auto-generated method stub
 				ToastUtil.toast(DeleteActivity.this, showMsg(userBeanList));
 				convertUserToObject(userBeanList);
 				
 			}
 		});
 	}
 	
 	/**
 	 * 弹出提示
 	 * @param userBmobObjects
 	 * @return
 	 */
 	private String showMsg(List<UserBean> userBmobObjects){
 		String msg = "";
 		if(userBmobObjects.size() == 0){
 			msg = "数据不存在!";
 		}
 		for(UserBean userBean:userBmobObjects){
 			msg += userBean.getObjectId() + "," + userBean.getUserId() + "," + userBean.getUserName() + "," 
 					+ userBean.getPassword() + "\n";
 		}
 		return msg;
 	}
 	
 	/**
 	 * 将子类集合转换为基类BmobObject集合
 	 * @param userBeanList
 	 * @return
 	 */
 	private List<BmobObject> convertUserToObject(List<UserBean> userBeanList){
 		queryBeans.clear();
 		for(UserBean userBean: userBeanList){
 			queryBeans.add(userBean);
 		}
 		
 		return queryBeans;
 	}
 
 }

以上就是本文Bmob对数据进行(批量)增删改的所有内容，下一篇我们将讲解Bmob如何进行查询的。

[http_blog.csdn.net_a123demi_article_details_42059621]: http://blog.csdn.net/a123demi/article/details/42059621
[http_download.csdn.net_detail_a123demi_8296591]: http://download.csdn.net/detail/a123demi/8296591
[20141224225055189]: /images/20220806/d738dabbf0d54615b6e3af647becb9a7.png