EventBus的簡單使用

首先加入EventBus的依賴

 1 compile 'de.greenrobot:eventbus:3.0.0-beta1' 

EventBus代碼實現

 1 import android.content.Intent;
 2 import android.support.v7.app.AppCompatActivity;
 3 import android.os.Bundle;
 4 import android.view.View;
 5 import android.widget.TextView;
 6 
 7 import de.greenrobot.event.EventBus;
 8 import de.greenrobot.event.Subscribe;
 9 import de.greenrobot.event.ThreadMode;
10 
11 public class MainActivity extends AppCompatActivity {
12     private TextView tv;
13     @Override
14     protected void onCreate(Bundle savedInstanceState) {
15         super.onCreate(savedInstanceState);
16         setContentView(R.layout.activity_main);
17         tv= (TextView) findViewById(R.id.tv);
18         EventBus.getDefault().register(this);//註冊EventBus
19     }
20 
21     public void onClick(View view) {
22         Intent intent=new Intent(this,Main2Activity.class);
23         startActivity(intent);
24     }
　　　　//接受EventBus傳遞的消息
25     @Subscribe(threadMode= ThreadMode.MainThread)
26     public void getMessage(String string){
27         tv.setText(string);
28     }
29 }

 1 import android.support.v7.app.AppCompatActivity;
 2 import android.os.Bundle;
 3 import android.view.View;
 4 
 5 import de.greenrobot.event.EventBus;
 6 
 7 public class Main2Activity extends AppCompatActivity {
 8 
 9     @Override
10     protected void onCreate(Bundle savedInstanceState) {
11         super.onCreate(savedInstanceState);
12         setContentView(R.layout.activity_main2);
13     }
14 
15     public void onClick(View view) {
16         EventBus.getDefault().post("我是第二個頁面發送的消息");
17     }
18 }

使用EventBus在那個類接收消息就在那個類中註冊