如何使我的所有活动都能够处理来自服务的广播？

// 自定义广播接收器类
public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // 处理接收到的广播消息
        String action = intent.getAction();
        if (action.equals("com.example.MY_ACTION")) {
            // 广播类型为"com.example.MY_ACTION"时的处理逻辑
            String message = intent.getStringExtra("message");
            // 更新UI或执行其他操作
        }
    }
}

// 在活动中注册和取消注册广播接收器
public class MainActivity extends AppCompatActivity {
    private MyBroadcastReceiver receiver;

    @Override
    protected void onResume() {
        super.onResume();
        // 注册广播接收器
        receiver = new MyBroadcastReceiver();
        IntentFilter filter = new IntentFilter("com.example.MY_ACTION");
        registerReceiver(receiver, filter);
    }

    @Override
    protected void onPause() {
        super.onPause();
        // 取消注册广播接收器
        unregisterReceiver(receiver);
    }
}

Intent intent = new Intent("com.example.MY_ACTION");
intent.putExtra("message", "Hello, world!");
sendBroadcast(intent);