首页 > 代码库 > 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)
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)
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)。
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
代码执行效果：
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
<span style="font-family:SimSun;font-size:18px;">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;
}
}</span>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
<span style="font-family:SimSun;font-size:18px;"><span style="white-space:pre"> </span>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
}
});</span>2.批量增加
Bmob对于批量增加的方法为insertBatch(Context context,List<BmobObject> list,SaveListener saveListener),
<span style="font-family:SimSun;font-size:18px;"> new BmobObject().insertBatch(this, userBeans, new SaveListener() {
@Override
public void onSuccess() {
}
@Override
public void onFailure(int arg0, String arg1) {
}
});</span>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 one rror(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
<span style="font-family:SimSun;font-size:18px;">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");
}
});</span>2.批量修改
bmob实现批量修改方法udpateBatch(Context context,List<BmobObject> list,UpdateListener updateListener)<span style="font-family:SimSun;font-size:18px;">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");
}
});</span>修改具体代码：
<span style="font-family:SimSun;font-size:18px;">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");
<span style="white-space:pre"> </span>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 one rror(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;
}
}
</span>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
<span style="font-family:SimSun;font-size:18px;">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");
}
});</span>2.批量删除
bmob实现批量删除方法deleteBatch(Context context,List<BmobObject> list,DeleteListenerdeleteListener)<span style="font-family:SimSun;font-size:18px;"> 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");
}
});</span>删除的具体代码：
<span style="font-family:SimSun;font-size:18px;">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");
<span style="white-space:pre"> return;</span>}
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 one rror(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;
}
}
</span>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。
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)
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