Android如何使用Bmob后端云实现失物招领功能

buildscript {

  repositories {
    Google()
        jcenter()   
  }
  dependencies {
        classpath 'com.android.tools.build:gradle:3.6.1'
  }
}

allprojects {
  repositories {
    google()
    jcenter()

    //Bmob的maven仓库地址--必填
    maven { url "https://raw.GitHub.com/bmob/bmob-android-sdk/master" }
  }
}

task clean(type: Delete) {
  delete rootProject.buildDir
}

android {
    compileSdkVersion 30
  buildToolsVersion "30.0.3"

  **兼容Android6.0系统所需，如果这句话报错，可在dependencies标签下使用compile 'cn.bmob.android:http-legacy:1.0'**
  useLibrary 'org.apache.http.legacy'

  ...
}

dependencies {
  //以下SDK开发者请根据需要自行选择
  //bmob-sdk：Bmob的android sdk包，包含了Bmob的数据存储、文件等服务，以下是最新的bmob-sdk:
  //3.5.5：请务必查看下面注释[1]
  implementation 'cn.bmob.android:bmob-sdk:3.5.5'

  //bmob-push：Bmob的推送包
  implementation 'cn.bmob.android:bmob-push:0.8'

  //bmob-im：Bmob的即时通讯包，注意每个版本的im依赖特定版本的bmob-sdk，具体的依赖关系可查看下面注释[2]
  implementation 'cn.bmob.android:bmob-im:2.0.5@aar'
  implementation 'cn.bmob.android:bmob-sdk:3.4.7-aar'

  //bmob-sms ：Bmob单独为短信服务提供的包
  implementation 'cn.bmob.android:bmob-sms:1.0.1'

  //如果你想应用能够兼容Android6.0，请添加此依赖(org.apache.http.legacy.jar)
  implementation 'cn.bmob.android:http-legacy:1.0'
}

<uses-permission android:name="android.permission.INTERNET" /> 
<!--获取GSM（2g）、WCDMA（联通3g）等网络状态的信息 --> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
<!--获取wifi网络状态的信息 --> 
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 
<!--保持CPU 运转，屏幕和键盘灯有可能是关闭的,用于文件上传和下载 -->
<uses-permission android:name="android.permission.WAKE_LOCK" /> 
<!--获取sd卡写的权限，用于文件上传和下载-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!--允许读取手机状态 用于创建BmobInstallation--> 
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

//第一：默认初始化
Bmob.initialize(this,"Your Application ID");

  private void bmobReGISterAccount() {
    final String registerName = accountRegisterName.getText().toString().trim();//账号
    final String registerPassWord = accountRegisterPassword.getText().toString().trim();//密码

    if (TextUtils.isEmpty(registerName) || TextUtils.isEmpty(registerPassword)) {
      showToast("注册账号或密码为空");
      return;
    }

    BmobUser bmobUser = new BmobUser();
    bmobUser.setUsername(registerName);
    bmobUser.setPassword(registerPassword);
    bmobUser.signUp(new SaveListener<BmobUser>() {
      @Override
      public void done(BmobUser bmobUser, BmobException e) {
        if (e == null) {
          showToast("恭喜，注册账号成功");
          finish();
        } else {
          showToast("register fail:" + e.getMessage());
        }
      }
    });
  }

  private void bmobUserAccountLogin() {
    final String accountName = accountLoginName.getText().toString().trim();//账号
    final String accountPassword = accountLoginPassword.getText().toString().trim();//密码

    if (TextUtils.isEmpty(accountName)) {
      showToast("账号不能为空");
      return;
    }

    if (TextUtils.isEmpty(accountPassword)) {
      showToast("密码不能为空");
      return;
    }

    //登录过程
    showProgressBar();

    new Handler().postDelayed(new Runnable() {
      @Override
      public void run() {
        //BmobUser类为Bmob后端云提供类
        BmobUser bmobUser = new BmobUser();
        bmobUser.setUsername(accountName);
        bmobUser.setPassword(accountPassword);
        bmobUser.login(new SaveListener<BmobUser>() {
          @Override
          public void done(BmobUser bmobUser, BmobException e) {
            if (e == null) {
              //登录成功后进入主界面
              Intent intent = new Intent(LoginActivity.this, LostAndFoundActivity.class);
              startActivity(intent);
              finish();
            } else {
              showToast("" + e.getMessage());
              hiddenProgressBar();//隐藏
            }
          }
        });
      }
    }, 3000);
  }

public class LostInfomationReq extends BmobObject{
  private String title; //标题
  private String phoneNum;//手机号码
  private String desc;//描述

  public String getTitle() {
    return title;
  }

  public void setTitle(String title) {
    this.title = title;
  }

  public String getPhoneNum() {
    return phoneNum;
  }

  public void setPhoneNum(String phoneNum) {
    this.phoneNum = phoneNum;
  }

  public String getDesc() {
    return desc;
  }

  public void setDesc(String desc) {
    this.desc = desc;
  }
}

  
  private void publishLostInfo(String titleName, String num, String descridle) {
    LostInfomationReq lostInfomationReq = new LostInfomationReq();
    lostInfomationReq.setTitle(titleName);//titleName为用户输入的标题
    lostInfomationReq.setPhoneNum(num);//num为用户输入的号码
    lostInfomationReq.setDesc(descridle);//descridle为信息描述
    lostInfomationReq.save(new SaveListener<String>() {
      @Override
      public void done(String s, BmobException e) {
        if (e == null) {
          showToast("招领信息发布成功");

          //成功后提示主界面刷新数据
          Intent intent = new Intent();
          setResult(RESULT_OK, intent);
          //成功后将页面销毁
          finish();
        } else {
          showToast("信息发布失败");
        }
      }
    });
  }

  private void initData() {
    BmobQuery<LostInfomationReq> lostInfomationReqBmobQuery = new BmobQuery<>();
    lostInfomationReqBmobQuery.order("-updatedAt");//排序
    lostInfomationReqBmobQuery.findObjects(new FindListener<LostInfomationReq>() {
      @Override
      public void done(List<LostInfomationReq> list, BmobException e) {
        if (e == null) {
          lostInfomationReqList = list;
          lostAndFoundAdapter.setData(list);
          recyclerView.setAdapter(lostAndFoundAdapter);
        } else {
          showToast("查询数据失败");
        }
      }
    });
  }

  private void deleteItemData(final int position) {
    if (lostInfomationReqList.size() != 0) {
      LostInfomationReq lostInfomationReq = new LostInfomationReq();
      lostInfomationReq.setObjectId(lostInfomationReqList.get(position).getObjectId());
      lostInfomationReq.delete(new UpdateListener() {
        @Override
        public void done(BmobException e) {
          if (e == null) {
            lostInfomationReqList.remove(position);
            lostAndFoundAdapter.setData(lostInfomationReqList);
            lostAndFoundAdapter.notifyDataSetChanged();
          } else {
            showToast("删除数据失败");
          }
        }
      });
    }
  }

  
  private void updataInfo(String titleName, String num, String descridle) {
    LostInfomationReq lostInfomationReq = new LostInfomationReq();
    lostInfomationReq.setTitle(titleName);//titleName为用户输入的标题
    lostInfomationReq.setPhoneNum(num);//num为用户输入的号码
    lostInfomationReq.setDesc(descridle);//descridle为信息描述
    lostInfomationReq.update(infomationReq.getObjectId(), new UpdateListener() {
      @Override
      public void done(BmobException e) {
        if (e == null) {
          showToast("更新信息成功");
          //更新数据后提示主界面进行数据刷新
          Intent intent = new Intent();
          setResult(RESULT_OK, intent);
          finish();
        }
      }
    });
  }

  private void showWindow(LostAndFoundHolder holder, final int pos) {
    //加载布局文件
    View contentview = LayoutInflater.from(mContext).inflate(R.layout.pop_window_view,null);
    final PopupWindow popupWindow = new PopupWindow(contentview, LinearLayout.LayoutParams.WRAP_CONTENT,
        LinearLayout.LayoutParams.WRAP_CONTENT);
    //设置焦点
    popupWindow.setFocusable(true);
    //触摸框外
    popupWindow.setOutsideTouchable(true);
    //点击空白处的时候让PopupWindow消失
    popupWindow.setBackgroundDrawable(new ColorDrawable(0x00000000));
    //设置偏移量
    popupWindow.showAsDropDown(holder.time, 300, -100);

    //showAsDropDown(View anchor)：相对某个控件的位置（正左下方），无偏移
    // showAsDropDown(View anchor, int xoff, int yoff)：相对某个控件的位置，有偏移
    //showAtLocation(View parent, int gravity, int x, int y)：相对于父控件的位置（例如正中央Gravity.CENTER，下方Gravity.BOTTOM等），可以设置偏移或无偏移

    //点击编辑按钮
    contentview.findViewById(R.id.edit_btn).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        //回调给主界面，进行数据操作
        mItemClickListener.onEditOrDeleteClick(pos, EDIT_CODE);
        //销毁弹出框
        popupWindow.dismiss();
      }
    });

    //点击删除按钮
    contentview.findViewById(R.id.delete_btn).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        //回调给主界面，进行数据操作
        mItemClickListener.onEditOrDeleteClick(pos, DELETE_CODE);
        //销毁弹出框
        popupWindow.dismiss();
      }
    });
  }