android开发——异步消息的处理（灵活的使用EventBus）

不知道EventBus如何使用的，可以看下这边博客：https://blog.csdn.net/river66/article/details/86571860

发送异步消息：

EventBus.getDefault().post(new AsyncMessage(200, "成功").setData(new Object()).sendTo("MainActivity"));

接收异步消息：

    @Subscribe(threadMode = ThreadMode.MAIN)
    public void dealMessage(AsyncMessage.MainActivityMessage message) {
        switch (message.getCode()) {
            case 200:
                String message = message.getMessage();
                Object data = message.getData();
                break;
            case 404:
                break;
        }
    }

如何定义AsyncMessage 实体类呢？代码如下：

/**
 * @author dongxiaojiang
 * on 2019/4/22
 * 

 * example:
 * 调用: EventBus.getDefault().post(new AsyncMessage(200,"message").setData("data").sendTo("MainActivity"));
 * 接收: function(AsyncMessage.MainActivityMessage message)
 */
public class AsyncMessage extends AbstractAsyncMessage {
    private Object data;
    private String targetActivityName;

    /**
     * 新增Activity异步消息类的时候，要新增此方法的case
     */
    private Object getActivityMessage() {
        Object message = null;
        switch (targetActivityName) {
            case "MainActivity":
                message = new MainActivityMessage(this.getCode(), this.getMessage());
                break;
        }
        return message;
    }

    /**
     * 新增Activity异步消息类的时候，继承ActivityMessage即可
     */
    public class MainActivityMessage extends ActivityMessage {

        public MainActivityMessage(int code, String message) {
            super(code, message);
        }
    }

    public AsyncMessage(int code) {
        super(code);
    }

    public AsyncMessage(int code, String message) {
        super(code, message);
    }

    public Object sendTo(String targetActivityName) {
        this.targetActivityName = targetActivityName;
        return getActivityMessage();
    }

    public AsyncMessage setData(Object data) {
        this.data = data;
        return this;
    }

    @Override
    public Object getData() {
        return data;
    }

    public class ActivityMessage extends AbstractAsyncMessage {

        public ActivityMessage(int code, String message) {
            super(code, message);
        }

        @Override
        public Object getData() {
            return AsyncMessage.this.data;
        }
    }
}

 AbstractAsyncMessage.java

/**
 * @author dongxiaojiang
 * on 2019/4/22
 */
public abstract class AbstractAsyncMessage {
    protected int code;
    protected String message;

    public abstract Object getData();

    public AbstractAsyncMessage(int code) {
        this(code, "");
    }

    public AbstractAsyncMessage(int code, String message) {
        this.code = code;
        this.message = message;
    }

    public int getCode() {

        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

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