CODEWITHSUNDEEP
android
ssrp
ssrp

Reputation: 1266

checking internet connection

I use the following code for checking my internet connection.

private boolean haveNetworkConnection() {
        boolean haveConnectedWifi = false;
        boolean haveConnectedMobile = false;

        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo[] netInfo = cm.getAllNetworkInfo();
        for (NetworkInfo ni : netInfo) {
            if (ni.getTypeName().equalsIgnoreCase("WIFI"))
                if (ni.isConnected() && ni.isAvailable())
                    haveConnectedWifi = true;
            if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
                if (ni.isConnected() && ni.isAvailable())
                    haveConnectedMobile = true;
        }
        return haveConnectedWifi || haveConnectedMobile;
    }

but it says that I have the internet connection connection either the internet connection is disconnected or connected. and this method is called in the middle of the onCreate() method and closes the application by the "back" button. Please help me on this.

Upvotes: 0

Views: 460

Answers (5)

Pradeep Sodhi
Pradeep Sodhi

Reputation: 2145

Firstly add these these two permission code lines in your AndroidManifest.xml file

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Then in your java code:

 //declaration
    boolean net;

    //onCreate

    net = isOnline();

    if (net == true) {
                            //perform internet related task
                        } else  {
                            AlertDialog.Builder alert = new AlertDialog.Builder(
                                    AddSite.this);

                            alert.setMessage(
                                    "No signal found or Internet connection is not connected.")
                                    .setTitle("Error")
                                    .setNeutralButton("OK",
                                            new DialogInterface.OnClickListener() {

                                                public void onClick(
                                                        DialogInterface dialog,
                                                        int which) {
                                                    // TODO Auto-generated method
                                                    // stub

                                                }
                                            }).show();
                        }

    //method

    public boolean isOnline() {
            ConnectivityManager cm = (ConnectivityManager) this
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            NetworkInfo activeNetworkInfo = cm.getActiveNetworkInfo();
            return activeNetworkInfo != null;

            // return cm.getActiveNetworkInfo().isConnected();

        }

Upvotes: 1

Scorpion
Scorpion

Reputation: 6891

public boolean checkConnection()
    {
        //ARE WE CONNECTED TO THE NET
        ConnectivityManager conMgr = (ConnectivityManager) getSystemService (YourActivityClassName.CONNECTIVITY_SERVICE);
        if (conMgr.getActiveNetworkInfo() != null && conMgr.getActiveNetworkInfo().isAvailable()&& conMgr.getActiveNetworkInfo().isConnected()) {
            return true;
        } else {
            return false;
        }
    }

Add this in the manifest file and then try.

Try with this. I used this in one of my project and it works fine for me.. Hope this will help you...

Upvotes: 0

mainu
mainu

Reputation: 448

Did you write the permissions in manifest.xml.

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

If u r checking in emulator, U have to set the connection in settings.

Upvotes: 0

Joe
Joe

Reputation: 2243

If your goal is communicating with a specific server (or domain) then you can use

try {
        InetAddress.getByName(SERVER).isReachable(CONNECTIVITY_TIMEOUT);
    } catch (UnknownHostException e1) {
        //unknown host
    } catch (IOException e1) {
        //IO exception
    }

eg SERVER=stackoverflow.com; CONNECTIVITY_TIMOUT=1000; // 1 second

Upvotes: 0

Blackbelt
Blackbelt

Reputation: 157447

you can achieve this listening for Connectiviy broadcast intent. So create your broadcast receiver and in the onReceive callback check for:

boolean noConnectivity = intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);

remember to filter the intent with android.net.conn.CONNECTIVITY_CHANGE

Edit: look the BroadcastReceiver doc

hope it helps

Upvotes: 1

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