Android10(API級別29)之前
ConnectivityManager cm =
(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean isConnected = activeNetwork != null &&
activeNetwork.isConnectedOrConnecting();
Android10之后已經棄用构舟，改用 NetworkCallbacks
1，新建一個NetworkCallbackImpl類繼ConnectivityManager.NetworkCallback
public class NetworkCallbackImpl extends ConnectivityManager.NetworkCallback {
@Override
public void onAvailable(Network network) {
super.onAvailable(network);
Log.i(TAG, "網(wǎng)絡已連接 ");
}
@Override
public void onLost(Network network) {
super.onLost(network);
Log.i(TAG, "網(wǎng)絡已斷開");
}
@Override
public void onCapabilitiesChanged(Network network, NetworkCapabilities networkCapabilities) {
super.onCapabilitiesChanged(network, networkCapabilities);
if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)) {
if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
Log.i(TAG, "wifi已經連接");
} else if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
Log.i(TAG, "數(shù)據(jù)流量已經連接");
} else {
Log.i(TAG, "其他網(wǎng)絡");
}
}
}
}
2，注冊實現(xiàn)類NetworkCallbackImpl
NetworkCallbackImpl networkCallback = new NetworkCallbackImpl();
NetworkRequest.Builder builder = new NetworkRequest.Builder();
NetworkRequest request = builder.build();
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (connMgr != null) {
connMgr.registerNetworkCallback(request, networkCallback);
}
