编写一个Android程序，实现无序广播的发送和接收

以下是一个简单的Android程序，用于发送和接收无序广播：

1.发送无序广播

Intent intent = new Intent();
intent.setAction("com.example.broadcast.MY_BROADCAST");
intent.putExtra("msg", "Hello, this is an unordered broadcast!");
sendBroadcast(intent);

2.接收无序广播

public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if ("com.example.broadcast.MY_BROADCAST".equals(action)) {
            String msg = intent.getStringExtra("msg");
            Toast.makeText(context, "Received broadcast message: " + msg, Toast.LENGTH_SHORT).show();
        }
    }
}

在AndroidManifest.xml文件中注册广播接收器：

<receiver android:name=".MyBroadcastReceiver">
    <intent-filter>
        <action android:name="com.example.broadcast.MY_BROADCAST" />
    </intent-filter>
</receiver>

以上代码中，我们首先创建了一个Intent对象，并设置了Action和Extra信息，然后调用sendBroadcast()方法发送广播。接着，我们创建了一个BroadcastReceiver的子类MyBroadcastReceiver，并重写了onReceive()方法来处理接收到的广播。最后，在AndroidManifest.xml文件中注册了MyBroadcastReceiver。