Android 进程间通信 BroadcastReceiver

2023年4月6日 152次阅读 来源: 豌豆琪琪

进程间通信，广播接收者，这个我们经常会用到，比如检测网络变化，这个还是比较实用的，但是如何实现，其实很简单，那我们就开始吧。

借助于之前activity 通信的demo 我们继续。Activity 跨进程通信

这个比较简单我们一切从简，如果还有不懂后边会贴出代码下载地址

1.新建项目，接收Activity （ReceiveActivity）中自定类继承自BroadcastReceiver 并且注册，设置action

 class MyReceive extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent != null && intent.getAction() != null) {
                String str = intent.getAction();
                Toast.makeText(getApplicationContext(), intent.getAction() + intent.getStringExtra("info"), Toast.LENGTH_SHORT).show();
            } else {
                Log.d(TAG, "onReceive: onReceive is  Null");
                Toast.makeText(getApplicationContext(), "onReceive is  Null", Toast.LENGTH_SHORT).show();
            }
        }
    }

注册广播并且自定义action标签，这个发送时要用到

 broadcastReceiver = new MyReceive();
        intentFilter = new IntentFilter();
        intentFilter.addAction("com.test.receiver");
        registerReceiver(broadcastReceiver, intentFilter);

 

现在用于接收的项目完毕了。

public class ReceiveActivity extends AppCompatActivity {
    private static final String TAG = "ReceiveActivity";
    /**
     * Hello World!
     */
    private TextView mTest;
    BroadcastReceiver broadcastReceiver;
    private IntentFilter intentFilter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(activity_main);
        broadcastReceiver = new MyReceive();
        intentFilter = new IntentFilter();
        intentFilter.addAction("com.test.receiver");
        registerReceiver(broadcastReceiver, intentFilter);
    }

   
    class MyReceive extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent != null && intent.getAction() != null) {
                String str = intent.getAction();
                Toast.makeText(getApplicationContext(), intent.getAction() + intent.getStringExtra("info"), Toast.LENGTH_SHORT).show();
            } else {
                Log.d(TAG, "onReceive: onReceive is  Null");
                Toast.makeText(getApplicationContext(), "onReceive is  Null", Toast.LENGTH_SHORT).show();
            }
        }
    }
}

 

2.现在新建项目，用于发送广播消息

                Intent intent1 = new Intent();
                intent1.setAction("com.test.receiver");
                intent1.putExtra("info", "内容");
                sendBroadcast(intent1);

 

就这么多，功能完成。

 

源码地址

 

 

    原文作者：豌豆琪琪
    原文地址: https://blog.csdn.net/u013179982/article/details/85162279
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
点赞