Android BroadcastReceiver连接\u更改是否始终在首次启动应用程序中运行？

我在Google Developer上读到：

（“android.net.conn.CONNECTIVITY_CHANGE”）在连接详细信息发生更改时执行操作

我有以下代码：

公共类MainActivity扩展了AppCompatActivity{

private NetworkChangeReceiver receiver;
private boolean connIntentFilterIsRegistered;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    receiver = new NetworkChangeReceiver();
}

@Override
protected void onPause() {
    super.onPause();
    if (connIntentFilterIsRegistered) {
        unregisterReceiver(receiver);
        connIntentFilterIsRegistered = false;
    }
}

@Override
protected void onResume() {
    super.onResume();
    if (!connIntentFilterIsRegistered) {
        registerReceiver(receiver, new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE"));
        connIntentFilterIsRegistered = true;
    }
}

及 //

公共类NetworkUtil{

public static int TYPE_WIFI = 1;
public static int TYPE_MOBILE = 0;
public static int TYPE_NOT_CONNECTED = 2;

public static int getConnectivityStatus(Context context) {
    ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
    if (activeNetwork != null && activeNetwork.isConnectedOrConnecting()) {
        if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
            return TYPE_WIFI;
        }
        if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
            return TYPE_MOBILE;
        }
    }
    return TYPE_NOT_CONNECTED;
}

public static String getConnectivityStatusString(Context context) {
    int conn = NetworkUtil.getConnectivityStatus(context);
    String status = null;
    if (conn == TYPE_MOBILE) {
        status = "Mobile cellular enabled";
    } else if (conn == TYPE_WIFI) {
        status = "Wifi enabled";
    } else if (conn == TYPE_NOT_CONNECTED) {
        status = "Not connected to internet";
    }
    return status;
}

}

---

当我第一次启动应用程序时，这个意图总是触发并显示一个与网络当前状态的对话框。但是根据本文档，它只在连接更改时发生？如果我只想在网络更改时显示，我该怎么办？非常感谢广播

android.net.conn.CONNECTIVITY\u change

广播。这意味着每当您为此操作注册

BroadcastReceiver

时，它总是会立即触发，并且

onReceive（）

将通过最近的广播连接更改被调用。这允许您在不等待更改的情况下获取连接的当前状态

如果要忽略当前状态，而只想处理状态更改，可以将其添加到

onReceive（）

：

---

非常感谢。在看到你的答案之前，我就这么做了，而且效果很好：D

if (isInitialStickyBroadcast()) {
    // Ignore this call to onReceive, as this is the sticky broadcast
} else {
    // Connectivity state has changed
    ... (your code here)
}