声明广播

private BroadcastReceiver broadcastReceiver;1.发送广播
Intent intent = new Intent("com.example.MY_ACTION");
intent.putExtra("message", "6");
getContext().sendBroadcast(intent);

2.注册接收广播

// 初始化 BroadcastReceiver
broadcastReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {// 处理接收到的广播消息String message = intent.getStringExtra("message");if (message.equals("6")) {//处理相应的逻辑// 取消注册广播接收器context.unregisterReceiver(broadcastReceiver);}}
};
// 注册广播接收器
IntentFilter intentFilter = new IntentFilter("com.example.MY_ACTION");
mContext.registerReceiver(broadcastReceiver, intentFilter);