greendao | 易学教程

GreenDAO with Sqlcipher Integration Example

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问题 I have setup a new project using GreenDAO, was able to generate with ExampleDAO using DaoGenerator. Everything works fine. I also have a prepopulated sqlite database shipped in android assets folder, on app run, it is being copied to android database system path. Now I want to integrate with SqlCipher, to have my database encrypted... If anybody can help or give example app, that would be a great help. 回答1: Please let me know if these solutions work for you: A sample project with the

greendao listview all data from Entity

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问题 GreenDAO. Which there is a simple way to display all the records from a Entity in the ListView, and is supported with the auto-update the list. Perhaps Lazylist class? how to use it? 回答1: Have a look here. I'm using an adapter like this (including a ViewHolder-Pattern to reuse the Views inside the ListView) as well and it is fast even for a lot of records. But this won't be usable if you need auto-update-functionality. Here are some information about LasyList to explain why: Get LazyList

How to integrate greenDAO with JSON Jackson and handle many to many relation mapping

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问题 Is there any best way to integrate JSON Jackson with greenDAO. Also, how to handle many to many relation mapping using greenDAO. I found that, we need to create a connecting table to have many to many mapping. Is there any example having all these features together. 回答1: You can do it in dao Generator file edit entity.ftl and add necessary lines to integrate Jackson ie import com.fasterxml.jackson.annotation.JsonProperty; and @JsonProperty("Tag Name") Thus you dont have to write any extra

Android GreenDao使用教程

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一、Greendao简介 Greendao是一款用于数据库创建与管理的框架，由于原生SQLite语言比较复杂繁琐，使得不少程序员不得不去学习SQLite原生语言，但是学习成本高，效率低下，所以不少公司致力于开发一款简单的数据库管理框架，较为著名的就有Greendao和ORMLite，但是就数据分析来看，Greendao的效率是高于ORMLite及其他框架的，是目前该行业的领先者。也因为Greendao的使用方法简便，且效率高使得其成为目前使用最为广泛的数据库管理框架，这也是广大程序员的福音。二、Greendao的使用方法 1.添加依赖在bulid.gradle文件下的dependencies下添加所需依赖 compile 'org.greenrobot:greendao:3.2.2' // add library compile 'org.greenrobot:greendao-generator:3.2.2' 2.在bulid.gradle下进行配置 apply plugin: 'org.greenrobot.greendao' buildscript { repositories { mavenCentral() } dependencies { classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' } } 3

GreenDao freemaker.jar is missing

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问题 I just downloaded the new jar file for GreenDao in order to create my DB for the app I'm building. After going through all the process of modeling my entities and the connections between them, I tried to run the generator project but got this error for the line that generated the DB: Exception in thread "main" java.lang.NoClassDefFoundError: freemarker/template/ObjectWrapper at com.glide.talk.glide.model.generator.Model.main(Model.java:29) Caused by: java.lang.ClassNotFoundException:

greenDao Schema Upgrade

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问题 I have seen another question about schema upgrade/migration using green dao (here) There are lots of links in that answer for a good pattern to use when doing schema upgrades - however there are no examples of what you actually do to your data to migrate it properly and I'm having trouble finding anything. In my case, my migration is incredibly straight forward - I do not wish to transform any existing data, I simply need to add some new tables to my schema, which I suspect is a fairly common

Android--数据库GreenDao使用

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一、简介 GreenDao 优点： 1.性能高，号称Android最快的关系型数据库 2.内存占用小 3.库文件比较小，小于100K，编译时间低，而且可以避免65K方法限制 4.支持数据库加密 greendao支持SQLCipher进行数据库加密有关SQLCipher可以参考这篇博客Android数据存储之Sqlite采用SQLCipher数据库加密实战 5.简洁易用的API 二、配置 1、需要在工程（Project）的build.gradle中添加依赖 buildscript { repositories { jcenter ( ) } dependencies { classpath 'com.android.tools.build:gradle:2.0.0' //GreenDao3依赖 classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1' } } 2、在项目（Module）的build.gradle中添加依赖 apply plugin : 'com.android.application' //使用greendaoapply plugin : 'org.greenrobot.greendao' android { compileSdkVersion 23 buildToolsVersion "23.0.2"

Green Dao Could not init DAOConfig

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问题 I tried to use an old android application, that's use Green Dao such us database also this applicatioh had a flavour, so I compile and I install the apk but the app wan't start it gives this exception : Process: com.xxxx.boeufaujardin, PID: 20011 java.lang.RuntimeException: Unable to create application com.android.tools.fd.runtime.BootstrapApplication: de.greenrobot.dao.DaoException: Could not init DAOConfig at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4556) at

AAC架构学习（初识）

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Android Jetpack 是google推出的方便开发人员更快速的搭建应用的框架，分为四大块：Architecture、UI、Foundationy 以及 Behavior。其中的 Architecture组件，则提供了我们相当灵活好用的架构组件。比较关键的4个模块为： Lifecycle：能够帮助我们轻松应对Activity/Fragment的生命周期问题，可以更加解耦的方式处理生命周期变化问题，从而轻松避免内存泄漏。 LiveData：基于观察者模式，并且可以感知生命周期的数据持有类，能够帮助我们更好的解耦数据。 ViewModel：用来存储和管理 UI 相关的数据，方便数据保存和更新，方便完成数据与UI的绑定（感觉很像MVVM） Room：提供了数据库持久化功能（感觉类似greendao）。 WorkManager：非常好用的后台任务模块。以上则可以构成google官方推荐的android应用新架构如下图：从上图可以看出，各个模块相互解耦，互不影响，结构清晰，易于维护。从此android开发终于有了自己的架构，之前的MVC,MVP,MVVM甚至基于前端的Flux架构，都不是真正意义上为android服务的，这次的AAC架构师google官方为android量身定做

how to make android recycler views adapter accept different data types?

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问题 i have a lot of recycler views, they all use the same adapter, i used to update them with arraylists of objects that id make as i went like this ADAPTER private List<CardWriter> cardMakerList; public CardAdapter(List<CardWriter> cardMakerList){ this.cardMakerList = cardMakerList; // this.mContext = context; } ACTIVITY public List<CardWriter> cardMakerList = new ArrayList<>(); public CardAdapter cardAdapter; recyclerView.setAdapter(cardAdapter); CardWriter cardWriter = new CardWriter