greendao实现数据更新

其实green到进行了很多优化，增删改查使用合适的数据结构，这里的updata是根据id这是Long型的，是主键。主键必有的，不染你后面很多更新就不能用 了

补充：重要：

在你修改了数据库部分任何代码都要进行卸载应用，在运行安装，不染很烦人的问题整的你不懂，还有数据库升级也是你晕的地方，最直接简单的办法就是卸载充运行。

 

其实就是你先根据条件拿到对象，在重新set某个属性，再调用update方法，传入相应的对象就ok了，代码展示：

 

这是工具类：红色标记是调用是update

package com.aa.db;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;

import com.aa.DaoMaster;
import com.aa.DaoSession;
import com.aa.data_newDao;
import com.example.administrator.myapplication.bean.data_new;

import org.greenrobot.greendao.query.QueryBuilder;

import java.util.List;

/**
 * Created by Administrator on 2019/5/15 0015.
 */

public class DBManager {
    private final static String dbName = "test_db";
    private static DBManager mInstance;
    private DaoMaster.DevOpenHelper openHelper;
    private Context context;

    public DBManager(Context context) {
        this.context = context;
        openHelper = new DaoMaster.DevOpenHelper(context, dbName, null);
    }

    /**
     * 获取单例引用
     *
     * @param context
     * @return
     */
    public static DBManager getInstance(Context context) {
        if (mInstance == null) {
            synchronized (DBManager.class) {
                if (mInstance == null) {
                    mInstance = new DBManager(context);
                }
            }
        }
        return mInstance;
    }

    private SQLiteDatabase getReadableDatabase() {
        if (openHelper == null) {
            openHelper = new DaoMaster.DevOpenHelper(context, dbName, null);
        }
        SQLiteDatabase db = openHelper.getReadableDatabase();
        return db;
    }

    private SQLiteDatabase getWritableDatabase() {
        if (openHelper == null) {
            openHelper = new DaoMaster.DevOpenHelper(context, dbName, null);
        }
        SQLiteDatabase db = openHelper.getWritableDatabase();
        return db;
    }

    /**
     * 插入一条记录
     *
     * @param data_new
     */
    public void insertUser(data_new data_new) {
        DaoMaster daoMaster = new DaoMaster(getWritableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        userDao.insertOrReplace(data_new);
    }

    public void insertUserList(List BlackInfoCallMIssedBeans) {
        if (BlackInfoCallMIssedBeans == null || BlackInfoCallMIssedBeans.isEmpty()) {
            return;
        }
        DaoMaster daoMaster = new DaoMaster(getWritableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        userDao.insertOrReplaceInTx(BlackInfoCallMIssedBeans);
    }

    public void deleteUser(data_new data_new) {
        DaoMaster daoMaster = new DaoMaster(getWritableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        userDao.queryBuilder()
                .where(data_newDao.Properties.NUMBERING.eq(data_new.getNUMBERING()))
                .buildDelete()
                .executeDeleteWithoutDetachingEntities();
    }

    public void updateUser(data_new data_new) {
        DaoMaster daoMaster = new DaoMaster(getWritableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        userDao.update(data_new);
    }

    public List queryUserList() {
        DaoMaster daoMaster = new DaoMaster(getReadableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        QueryBuilder qb = userDao.queryBuilder();
//                .orderDesc(data_newDao.Properties.Numbering);
        List list = qb.list();
        return list;
    }


    /**
     * 查询用户列表
     */
    public List queryUserList(String path) {
        DaoMaster daoMaster = new DaoMaster(getReadableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        QueryBuilder qb = userDao.queryBuilder();
        qb.where(data_newDao.Properties.NUMBERING.gt(path));
//                .orderAsc(data_newDao.Properties.PhoneNumber);
        List list = qb.list();
        return list;
    }

    //
    public List queryUser(String numbering) {
        DaoMaster daoMaster = new DaoMaster(getReadableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        QueryBuilder qb = userDao.queryBuilder();
//        qb.where(data_newDao.Properties.NUMBERING.gt(numbering));
        qb.where(data_newDao.Properties.NUMBERING.eq(numbering));
//                .orderAsc(data_newDao.Properties.PhoneNumber);
        List list = qb.list();
        return list;
    }
    //查询已盘数量
    public List queryUserInventoried() {
        DaoMaster daoMaster = new DaoMaster(getReadableDatabase());
        DaoSession daoSession = daoMaster.newSession();
        data_newDao userDao = daoSession.getData_newDao();
        QueryBuilder qb = userDao.queryBuilder();
//        qb.where(data_newDao.Properties.NUMBERING.gt(numbering));
        qb.where(data_newDao.Properties.Status.eq("已盘"));
//                .orderAsc(data_newDao.Properties.PhoneNumber);
        List list = qb.list();
        return list;
    }
}

这是Activity，在这里进行调用：红色标记是调用

public class ActivityPropertyCheckActivity extends Activity implements View.OnClickListener {

    private TextView tvAllQuantity;
    private TextView tvcheckQuantity;
    private int anIntAllAmount;//总数量
    private int anIntCheckAmount;//已盘点数量
    private String mAssertNameing;//资产编号 查询关键字

    private EditText getEd1() {
        return (EditText) findViewById(R.id.ed_1);
    }

    private EditText getEd2() {
        return (EditText) findViewById(R.id.ed_2);
    }

    private EditText getEd3() {
        return (EditText) findViewById(R.id.ed_3);
    }

    private EditText getEd4() {
        return (EditText) findViewById(R.id.ed_4);
    }

    private EditText getEd5() {
        return (EditText) findViewById(R.id.ed_5);
    }

    private EditText getEd6() {
        return (EditText) findViewById(R.id.ed_6);
    }

    private EditText getEd7() {
        return (EditText) findViewById(R.id.ed_7);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_property_check);
        //获得数据数目
        initData();
        findViewById(R.id.bt_back).setOnClickListener(this);
        findViewById(R.id.bt_conrm_check).setOnClickListener(this);
        tvcheckQuantity = (TextView) findViewById(R.id.tv_check_quantity);
        tvAllQuantity = (TextView) findViewById(R.id.tv_all_quantity);
        IntentFilter filter = new IntentFilter();
        filter.addAction("com.android.server.scannerservice.broadcast");
        this.registerReceiver(mResultReceiver, filter);
        tvcheckQuantity.setText(anIntCheckAmount + "");
        tvAllQuantity.setText(anIntAllAmount + "");
    }

    private void SearchData() {
        data_new dataNew = new data_new();
        dataNew.setNUMBERING(mAssertNameing);
        if (DBManager.getInstance(ActivityPropertyCheckActivity.this).queryUser(mAssertNameing).size() == 0) {
            Toast.makeText(this, "数据不存在，请重新扫描", Toast.LENGTH_SHORT).show();
        } else {
            //数据回显
            dataNew = DBManager.getInstance(ActivityPropertyCheckActivity.this).queryUser(mAssertNameing).get(0);
            getEd2().setText(dataNew.getUSER_OF_DEPARTMENT());
            getEd3().setText(dataNew.getSPECIFICATIONA());
//            getEd7().setText(dataNew.getINVENTORY_AMOUNT());
            getEd5().setText(dataNew.getLOCATION());
            getEd4().setText(dataNew.getUSER_OF_DEPARTMENT());
            getEd6().setText(dataNew.getNOTE());

            //盘点结果状更新;
            //盘点结果状态修改   数据修改
            if (Double.parseDouble(dataNew.getBOOK_AMOUNT()) < Double.parseDouble(dataNew.getINVENTORY_AMOUNT())) {
                dataNew.setINVENTORY_RESULT("盘实");//根据要求进行更改
            } else if (Double.parseDouble(dataNew.getBOOK_AMOUNT()) == Double.parseDouble(dataNew.getINVENTORY_AMOUNT())) {
                dataNew.setINVENTORY_RESULT("盘实");//根据要求进行更改
            } else if (Double.parseDouble(dataNew.getBOOK_AMOUNT()) > Double.parseDouble(dataNew.getINVENTORY_AMOUNT())) {
                dataNew.setINVENTORY_RESULT("盘亏");//根据要求进行更改
            }

        }//其实green到进行了很多优化，增删改查使用合适的数据结构，这里的updata是根据id这是Long型的，是主键。主键必有的。
        DBManager.getInstance(ActivityPropertyCheckActivity.this).updateUser(dataNew);//数据更新

    }
    private void initData() {
        anIntAllAmount = (DBManager.getInstance(ActivityPropertyCheckActivity.this).queryUserList()).size();
        anIntCheckAmount = DBManager.getInstance(ActivityPropertyCheckActivity.this).queryUserInventoried().size();

    }

    private BroadcastReceiver mResultReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub
            if (intent.getAction().equals("com.android.server.scannerservice.broadcast")) {
                mAssertNameing = intent.getStringExtra("scannerdata");
                getEd1().setText(mAssertNameing);
                List list = DBManager.getInstance(ActivityPropertyCheckActivity.this).queryUser(mAssertNameing);
                //扫码后进行资产数量修改
//                DBManager.getInstance(ActivityPropertyCheckActivity.this).modicationInventoryResult(list.get(0));
                list.get(0).setINVENTORY_AMOUNT(Double.parseDouble(list.get(0).getINVENTORY_AMOUNT()) + 1 + "");
                list.get(0).setStatus("已盘");
                DBManager.getInstance(ActivityPropertyCheckActivity.this).updateUser(list.get(0));
                if (mAssertNameing != null) {
                    SearchData();
                }
                refreshData();
            }
        }

    };


    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.bt_back:
                //TODO implement
                finish();
                break;
            case R.id.bt_conrm_check:
                refreshData();
                //TODO implement
                break;
        }
    }

    /*刷新盘点数目和未盘点数目*/
    private void refreshData() {

        initData();
        anIntCheckAmount = DBManager.getInstance(ActivityPropertyCheckActivity.this).queryUserInventoried().size();
        tvAllQuantity.setText(anIntAllAmount + "");
        tvcheckQuantity.setText(anIntCheckAmount + "");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mResultReceiver != null) {
            this.unregisterReceiver(mResultReceiver);
        }
    }

}