EventBus_粘性事件简单使用

最新推荐文章于 2022-02-04 14:20:16 发布

转载最新推荐文章于 2022-02-04 14:20:16 发布 · 271 阅读

本文介绍了一个简单的Android应用程序如何实现页面间的跳转，并通过EventBus进行跨页面的数据传递。主要内容包括MainActivity中按钮点击触发的跳转逻辑及使用EventBus发送自定义Bean对象，接收页面通过EventBus接收并显示发送过来的数据。

MainActivity
package com.example.aaaa;

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

import org.greenrobot.eventbus.EventBus;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button bt = findViewById(R.id.bt);

        //点击事件
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //跳转
                startActivity(new Intent(MainActivity.this, Tiao.class));
                //发送消息
                EventBus.getDefault().postSticky(new Bean("张一帆", 200));


            }
        });

    }

}
Bean
package com.example.aaaa;

/**
 * Created by Administrator on 2017/11/29.
 */

public class Bean {
    public String name;
    public int pass;

    public Bean(String name, int pass) {
        this.name = name;
        this.pass = pass;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getPass() {
        return pass;
    }

    public void setPass(int pass) {
        this.pass = pass;
    }

    @Override
    public String toString() {
        return "Bean{" +
                "name='" + name + '\'' +
                ", pass=" + pass +
                '}';
    }
}
Tiao跳转页面
package com.example.aaaa;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

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

/**
 * Created by Administrator on 2017/11/29.
 */

public class Tiao extends AppCompatActivity {

    private TextView tv;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tiao);
        Button bt = findViewById(R.id.tb);
        tv = findViewById(R.id.tv);
        //注册
        EventBus.getDefault().register(this);


    }
    //接受传值
    @Subscribe(sticky =  true,threadMode = ThreadMode.MAIN)
    public void getbean(Bean bean) {
        Toast.makeText(this, "" + bean.name + "" + bean.pass, Toast.LENGTH_SHORT).show();
        tv.setText(bean.getName());
    }

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