Android数据库框架——GreenDao3.2的配置 升级

网上有很多教程 官网上也有，所以我这边大概贴一下配置代码

apply plugin: 'com.android.application'android {    compileSdkVersion 25    buildToolsVersion "25.0.2"    defaultConfig {        applicationId "com.myapplication"        minSdkVersion 15        targetSdkVersion 25        versionCode 1        versionName "1.0"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"    }    buildTypes {        release {            debuggable true            minifyEnabled false            PRoguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }}apply plugin: 'org.greenrobot.greendao'// 需要配置的地方 -----2    GreenDaobuildscript {    repositories {        mavenCentral()    }    dependencies {        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1'    }}dependencies {    compile fileTree(include: ['*.jar'], dir: 'libs')    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {        exclude group: 'com.android.support', module: 'support-annotations'    })    compile 'com.android.support:appcompat-v7:25.1.1'    testCompile 'junit:junit:4.12'    // 需要配置的地方 -----1    GreenDao    compile 'org.greenrobot:greendao:3.2.0'//GreenDao    compile'org.greenrobot:greendao-generator:3.0.0'//    compile 'com.github.yuweiguocn:GreenDaoUpgradeHelper:v1.3.0'}// 需要配置的地方 -----3    GreenDaogreendao{    schemaVersion 1 //版本号，升级时可配置    targetGenDir 'src/main/java'//生成目录    daoPackage 'com.frontsurft.greendao.gen' //包名}
一些封装的方便的类 网上也有。可以参考 ：http://blog.csdn.net/QQ_26787115/article/details/51811984
还有说到数据库升级的时候 更改版本号 schemaVersion 为2  DaoMaster.onUpgrade 的代码如下
/** WARNING: Drops all table on Upgrade! Use only during development. */public static class DevOpenHelper extends OpenHelper {    public DevOpenHelper(Context context, String name) {        super(context, name);    }    public DevOpenHelper(Context context, String name, CursorFactory factory) {        super(context, name, factory);    }    @Override    public void onUpgrade(Database db, int oldVersion, int newVersion) {        Log.i("greenDAO", "Upgrading schema from version " + oldVersion + " to " + newVersion + " by dropping all tables");        dropAllTables(db, true);        onCreate(db);    }}数据库升级前面，我们学会了greenDAO的使用，下面来学习下升级。今天研究了下升级，掌握方法了还是蛮简单的，这里对数据库的升级，仅仅是添加字段，添加表。对于删除，修改字段这里不多讲，因为sqlite数据库不适合此操作：SQLite supports a limited subset of ALTER TABLE. The ALTER TABLE command in SQLite allows the user to rename a table or to add a new column to an existing table. It is not possible to rename a column, remove a column, or add or remove constraints from a table.
其实我发现  要支持增加表 增加字段   比如增加字段  直接在bean里增加  增加表也是按照前面步骤 然后 在点击make project  然后升级版本号 即可 
参考  http://www.jianshu.com/p/a7a9336187b1
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