ORM数据库简单的框架和黄油刀的使用

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第一步:在根目录的project里加入标记红色的依赖

buildscript {    repositories {        jcenter()        mavenCentral()    }    dependencies {        classpath 'com.android.tools.build:gradle:2.3.3'        classpath 'org.greenrobot:greendao-gradle-plugin:3.1.0'        // NOTE: Do not place your application dependencies here; they belong        // in the individual module build.gradle files    }}

第二步:在创建的项目的build.gradle下添加标记红色的依赖,绿色为butterknife的依赖

apply plugin: 'com.android.application'apply plugin: 'org.greenrobot.greendao'(在头部添加)

dependencies {    compile fileTree(dir: 'libs', include: ['*.jar'])    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {        exclude group: 'com.android.support', module: 'support-annotations'    })    compile 'com.android.support:appcompat-v7:26.+'    compile 'com.android.support.constraint:constraint-layout:1.0.2'    testCompile 'junit:junit:4.12'    compile 'org.greenrobot:greendao:3.1.0'

    //黄油刀的依赖    compile 'com.jakewharton:butterknife:8.8.1'    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'}greendao {    schemaVersion 1    daoPackage 'chendemin.bwei.com.myapplication.gen'    targetGenDir 'src/main/java'}

Bean类的使用

@Entitypublic class Person {    @Id    private Long id;    private String name;    private int age;

创建数据库

        DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this, "user", null);// 获取数据库操作对象SQLiteDatabase database = helper.getWritableDatabase();//获取DaoMaster对象DaoMaster daoMaster = new DaoMaster(database);// 获取DaoSession对象DaoSession session = daoMaster.newSession();// 拿到要操作的对象dao = session.getPersonDao();
数据库的简单操作

@OnClick({R.id.btn_insert, R.id.btn_delete, R.id.btn_updata, R.id.btn_query})public void onViewClicked(View view) {    switch (view.getId()) {        case R.id.btn_insert:            Person person1 = new Person();            person1.setName("zhansgan");            person1.setAge(12);            long insert = dao.insert(person1);            Log.i("CDM", "插入了: " + insert);            break;        case R.id.btn_delete:            Person person2 = new Person();            person2.setId(2L);            dao.delete(person2);            break;        case R.id.btn_updata:            Person person3 = new Person(4L,"Lisi",27);            dao.update(person3);            break;        case R.id.btn_query:            List<Person> list = dao.loadAll();            String Username="";            for (int i=0;i<list.size();i++) {                Username += list.get(i).getName() + ",";            }            Log.i("CDM", Username.toString());            break;    }

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