eventbus传

//接收

package com.example.butternkife;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.TextView;

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.btn_tz)
    Button btnTz;
    @BindView(R.id.s)
    TextView s;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        //接收中注册EventBus
        EventBus.getDefault().register(this);

    }
    @OnClick(R.id.btn_tz)
    public void onViewClicked() {
        startActivity(new Intent(getApplicationContext(), TwoActivity.class));
    }
    @Subscribe
    public void onEventMainThread(FirstEvent event){
        s.setText("来自第二个Activity的数据"+event.getMsg());
    }
    @Override
    //注销EventBus
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }
}

 

 

传的类

package com.example.butternkife;

/**
 * Created by 红鼻子小黑 on 2018/10/31.
 */

public class FirstEvent {
    private final String msg;

    public FirstEvent(String msg) {
        this.msg = msg;
    }

    public String getMsg() {
        return msg;
    }


}

 

//发送

package com.example.butternkife;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;

import org.greenrobot.eventbus.EventBus;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

public class TwoActivity extends AppCompatActivity {

    @BindView(R.id.btn_fh)
    Button btnFh;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_two);
        ButterKnife.bind(this);
    }

    @OnClick(R.id.btn_fh)
    public void onViewClicked() {
        EventBus.getDefault().post(new FirstEvent("我要传给我的爸爸"));
        finish();
    }
}