EventBus封装到项目架构|青训营笔记

//build.gradle(:app)
defaultConfig {
    ...
    javaCompileOptions {
        annotationProcessorOptions {
            //此处路径填写自己的包名+类名
            arguments = [ eventBusIndex : 'com.qxy.potato.MyEventBusIndex' ]
        }
    }
    ...
}
dependencies {
    ...
    //eventBus
    def eventbus_version = '3.2.0'
    implementation "org.greenrobot:eventbus:$eventbus_version"
    annotationProcessor "org.greenrobot:eventbus-annotation-processor:$eventbus_version"
}
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public class EventBusUtil {
    /**
     * 发送消息(事件)
     * @param event
     */
    public static void sendEvent(BaseEvent<?> event){
        EventBus.getDefault().post(event);
    }
    /**
     * 发送 粘性 事件
     *
     * 粘性事件，在注册之前便把事件发生出去，等到注册之后便会收到最近发送的粘性事件（必须匹配）
     * 注意：只会接收到最近发送的一次粘性事件，之前的会接受不到。
     * @param event
     */
    public static void sendStickyEvent(BaseEvent<?> event){
        EventBus.getDefault().postSticky(event);
    }
}
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@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface BindEventBus {
}
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public class BaseEvent<T> {
    private int eventCode;
    private T data;
    public BaseEvent(int eventCode, T data) {
        this.eventCode = eventCode;
        this.data = data;
    }
    public int getEventCode() {
        return eventCode;
    }
    public void setEventCode(int eventCode) {
        this.eventCode = eventCode;
    }
    public T getData() {
        return data;
    }
    public void setData(T data) {
        this.data = data;
    }
}
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//Fragment也是类似
public abstract class BaseActivity{
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if(this.getClass().isAnnotationPresent(BindEventBus.class)){
            EventBus.getDefault().register(this);
        }
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(this.getClass().isAnnotationPresent(BindEventBus.class)){
            EventBus.getDefault().unregister(this);
        }
    }
}
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@BindEventBus
public class MainActivity extends BaseActivity{
    /**
     * 载入view的一些操作
     */
    @Override
    protected void initView() {
        PictureGirl girl = new PictureGirl();
        BaseEvent<PictureGirl> ev = new BaseEvent<>(1,girl);
        EventBusUtil.sendEvent(ev);
    }
    @Subscribe(threadMode = ThreadMode.MAIN)
    public void onMainActivityEvent(BaseEvent event){
    }
}
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public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        //使用订阅索引，加快编译速度
        EventBus.builder().addIndex(new MyEventBusIndex()).installDefaultEventBus();
    }
}
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