本地广播

最新推荐文章于 2024-03-27 23:36:13 发布

原创最新推荐文章于 2024-03-27 23:36:13 发布 · 172 阅读

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博客介绍了广播的发送与接收，强调在发送广播前必须先运行接收广播，涉及信息技术中广播通信相关内容。

发送广播

Intent intent = new Intent("aaa");
intent.putExtra("a","广播");
LocalBroadcastManager manager = LocalBroadcastManager.getInstance(this);
manager.sendBroadcast(intent);

接收广播

LocalBroadcastManager manager = LocalBroadcastManager.getInstance(this);
//注册
manager.registerReceiver(new broadcastReceiver(), new IntentFilter("aaa"));

//关闭
@Override
protected void onDestroy() {
    super.onDestroy();
    manager.unregisterReceiver(new broadcastReceiver());
}

public class broadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String aa = intent.getStringExtra("a");
        Toast.makeText(context, "收到广播" + aa, Toast.LENGTH_SHORT).show();
        tv.setText(aa);
    }
}

注：在发送广播之前必须要先运行接收广播