初见EventBus

优点

方便各种乱七八糟东西之间的通信，不墨迹

初级使用

1.创建事件类

package com.lw.lw.eventbustest;

/**
 * Created by liwei on 2017/8/30.
 */

public class MessageEvent {
    private String message;

    public MessageEvent(String message) {
        this.message = message;
    }

    public String getMessage() {
        return message;
    }

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

2.在MainActivity注册事件并对接受到的事件进行处理

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        textView = (TextView) findViewById(R.id.tv);
        jumpSecondBtn = (Button) findViewById(R.id.btn);

        jumpSecondBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startActivity(new Intent(MainActivity.this,SecondActivity.class));
            }
        });

        //注册事件
        EventBus.getDefault().register(this);
    }

    //处理事件，方法名字可以瞎jier写
    @Subscribe( threadMode = ThreadMode.MAIN)
    public void getEventBusMessage(MessageEvent messageEvent){
        textView.setText(messageEvent.getMessage());
    }

    //取消事件
    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }

3.发送事件

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

        tv = (TextView) findViewById(R.id.textView);
        tv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                EventBus.getDefault().post(new MessageEvent("汪汪汪"));
                finish();
            }
        });
    }

Over 在这里诅咒我呆变成宋仲基

好想画这种啊啊啊啊