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:<ul><li>Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
<a href="syncProject">Re-download dependencies and sync project (requires network)</a></li><li>The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
<a href="stopGradleDaemons">Stop Gradle build processes (requires restart)</a></li><li>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.</li></ul>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。
