GreenDao3.2的配置

直接进入主题，看看GreenDao在AndroidStudio中的配置以及简单的使用
在工程build.gradle中的配置,代码如下

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.2'
        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

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

注意：

在工程build.gradle中只是添加了classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2'

在app下的build.gradle中的配置，代码如下

apply plugin: 'com.android.application'
apply plugin: 'org.greenrobot.greendao'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.3"
    defaultConfig {
        applicationId "com.tbwy.greendao"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

//greendao配置
greendao{
    //版本号，升级时可配置,对应当前数据库版本
    schemaVersion 1
    //由GreenDao自动生成代码所在的包名，默认的是在项目包下面新建一个gen
    daoPackage 'com.tbwy.greendao.greendao.gen'
    //设置自动生成代码的目录
    targetGenDir 'src/main/java'
}

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-v7:25.3.1'
    testCompile 'junit:junit:4.12'
    compile 'org.greenrobot:greendao:3.2.2'
}

注意：

在app下的build.gradle中添加了三处代码：
1，apply plugin: 'org.greenrobot.greendao'
2，增加greendao配置

//greendao配置
greendao{
    //版本号，升级时可配置,对应当前数据库版本
    schemaVersion 1
    //由GreenDao自动生成代码所在的包名，默认的是在项目包下面新建一个gen
    daoPackage 'com.tbwy.greendao.greendao.gen'
    //设置自动生成代码的目录
    targetGenDir 'src/main/java'
}

3，添加greendao依赖compile 'org.greenrobot:greendao:3.2.2'

项目更新完成后，我们就需要来写一个实体类了，就是要往数据库中存储的数据类。它是建立在包名下的，也就是com.tbwy.greendao下，以“书”为例

@Entity
public class Book {
    @Id
    private Long bookId;
    private String bookName;
    private String bookAutho;
}

写成这样就可以了，然后一次点击菜单Build-->Make Project，运行完成后；在此打开我们建立的实体类Book

@Entity
public class Book {
    @Id
    private Long bookId;
    private String bookName;
    private String bookAutho;
    @Generated(hash = 619701788)
    public Book(Long bookId, String bookName, String bookAutho) {
        this.bookId = bookId;
        this.bookName = bookName;
        this.bookAutho = bookAutho;
    }
    @Generated(hash = 1839243756)
    public Book() {
    }
    public Long getBookId() {
        return this.bookId;
    }
    public void setBookId(Long bookId) {
        this.bookId = bookId;
    }
    public String getBookName() {
        return this.bookName;
    }
    public void setBookName(String bookName) {
        this.bookName = bookName;
    }
    public String getBookAutho() {
        return this.bookAutho;
    }
    public void setBookAutho(String bookAutho) {
        this.bookAutho = bookAutho;
    }
}

可以看出系统给自动生成了一些代码，用于获取和设置值
而且在com.tbwy.greendao.greendao.gen目录下，自动生成了三个类BookDao,DaoMaster,DaoSession， 示例图为：

Paste_Image.png

这样GreenDao的适配工作就完成了。

配置过程中遇到的问题：

Error:Unable to find method 'org.gradle.api.tasks.TaskInputs.file(Ljava/lang/Object;)Lorg/gradle/api/tasks/TaskInputFilePropertyBuilder;'.
Possible causes for this unexpected error include:
Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
Re-download dependencies and sync project (requires network)
The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
Stop Gradle build processes (requires restart)
Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.
In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

图为：

Paste_Image.png

我造成这个问题的原因是因为gradle的版本低了，我换了一个gradle-3.5的版本后，问题得以解决。