第三方库EventBus消息传递的使用

Posted 2020-09-03 丽-pc

个人学习，仅供菜鸟们学习！

 

 

实例：

 

 

 

 

首先添加依赖：

//EventBus依赖
compile \'org.greenrobot:eventbus:3.0.0\'
然后创建布局：

然后创建activity消息类

创建MainActivity

package com.fuicuiedu.xc.eventbus_20170307;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

TextView mTv;

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

//EventBus在监听事件模块完成注册
EventBus.getDefault().register(this);

mTv = (TextView) findViewById(R.id.main_tv);

findViewById(R.id.mian_btn).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,SecondActivity.class);
startActivity(intent);
}
});
}

@Subscribe(threadMode = ThreadMode.MAIN)
public void aaa(MessageEvent messageEvent){
String msg = messageEvent.getMsg();
//弹吐司
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
//更新UI
mTv.setText(msg);
}

@Override
protected void onDestroy() {
super.onDestroy();
//取消订阅，反注册
EventBus.getDefault().unregister(this);
}
}

跳转页面：

package com.fuicuiedu.xc.eventbus_20170307;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

import org.greenrobot.eventbus.EventBus;

public class SecondActivity extends AppCompatActivity {

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

findViewById(R.id.second_btn).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//发送事件
EventBus.getDefault().post(new MessageEvent("面对疾风吧！"));
}
});
}
}

完毕！！！项目名称