我能够使用
检测互联网连接public class InternetDetector {
private Context _context;
public InternetDetector(Context context) {
this._context = context;
}
/**
* Checking for all possible internet providers
**/
public Boolean isConnectingToInternet() {
ConnectivityManager connectivityManager
= (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnectedOrConnecting();
}
public Boolean isOnline() {
try {
Process p1 = java.lang.Runtime.getRuntime().exec("ping -c 1 www.google.com");
int returnVal = p1.waitFor();
boolean reachable = (returnVal == 0);
return reachable;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}
}
如果有互联网,这可以很好地工作,但在某些情况下,我可以连接到WIFI,但没有互联网。在这种情况下,如果互联网不可用,我会在10秒后向用户显示一条消息[无互联网检查您的连接]
我怎样才能实现它。
答案 0 :(得分:0)
您可以使用处理程序
来实现此目的new Handler().postDelayed(new Runnable() {
@Override
public void run() {
// This method will be executed once the timer is over
// Your message here
}
}, 10000); //Your time here in miliseconds
时间结束后,将向用户显示该消息。很简单就是这样。
10秒钟即可添加10000
答案 1 :(得分:0)
您可以尝试以下方法检查互联网连接,然后在没有互联网的情况下显示祝酒词:
boolean isInternetAvailable = checkInternetConnection(this);
if(!isInternetAvailable) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Toast.makeText(this, "No INTERNET CHECK YOUR CONNECTION", Toast.LENGTH_SHORT).show();
}
}, 10000);
}
public static boolean checkInternetConnection(Context context) {
final ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connMgr.getActiveNetworkInfo();
if (activeNetworkInfo != null) { // connected to the internet
Toast.makeText(context, activeNetworkInfo.getTypeName(), Toast.LENGTH_SHORT).show();
if (activeNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
// connected to wifi
return isWifiInternetAvailable();
} else if (activeNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
// connected to the mobile provider's data plan
return true;
}
}
return false;
}
public boolean isWifiInternetAvailable() {
try {
InetAddress ipAddr = InetAddress.getByName("google.com"); //You can replace it with your name
return !ipAddr.equals("");
} catch (Exception e) {
return false;
}
}
答案 2 :(得分:0)
你是对的,你可以检查一下你是否与wifi
或Cellular Network
有关,但是你无法轻易检查你是否真的与Internet
有关。
现在,检查您是否真正连接到互联网的唯一方法是连接到远程服务器!例如:
public static boolean hasInternetAccess(Context context) {
if (isNetworkAvailable(context)) {
try {
HttpURLConnection urlc = (HttpURLConnection)
(new URL("http://clients3.google.com/generate_204")
.openConnection());
urlc.setRequestProperty("User-Agent", "Android");
urlc.setRequestProperty("Connection", "close");
urlc.setConnectTimeout(1500);
urlc.connect();
return (urlc.getResponseCode() == 204 &&
urlc.getContentLength() == 0);
} catch (IOException e) {
Log.e(TAG, "Error checking internet connection", e);
}
} else {
Log.d(TAG, "No network available!");
}
return false;
}
您可以将网址更改为任何所需的地址,但此网址会生成确定的响应,因此您不必担心服务器问题。当然您可以将其更改为您的服务器以检查服务器的可用性^^
有关详细信息,请查看以下答案: Detect if Android device has Internet connection