android check internet connection 안드로이드 인터넷 연결상태 확인하기

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

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

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

NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
return true;
}
return false;
}

public boolean isOnlineToWifi(){
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if( netInfo != null && netInfo.isConnectedOrConnecting() ){
return true;
}
return false; 
}

public boolean isOnlineToMobile(){ 
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if( netInfo != null && netInfo.isConnectedOrConnecting() ){
return true;
}
return false; 
}

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<receiver android:name =".TestReceiver">

    <intent-filter>

        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />

    </intent-filter> 

</receiver>

public class clsNetwork extends BroadcastReceiver {

    String action;

     

    @Override

    public void onReceive(Context context, Intent intent) {

        // TODO Auto-generated method stub

        action = intent.getAction();

         

        if(action.equals(ConnectivityManager.CONNECTIVITY_ACTION))

        {

            //네트워크 변화가 생길경우에 처리할 코드 삽입

        }

    }

}




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public class ConnectionBroadcastReceiver extends BroadcastReceiver

{

    private static final int STATE_NONE = 0;

    private static final int STATE_WIFI_CONNECTED = 1;

    private static final int STATE_MOBILE_CONNECTED = 2;

    private int state = STATE_NONE;

    @Override

    public void onReceive(Context context, Intent intent) 

    {

        try

        {

            String action = intent.getAction();

            if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION))

            {

                ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

                NetworkInfo niWifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

                NetworkInfo niMobile = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

                if (state == STATE_NONE)

                {

                    if (niWifi.getState() == State.CONNECTED)

                    {

                        state = STATE_WIFI_CONNECTED;

                    }

                    else if (niMobile.getState() == State.CONNECTED)

                    {

                        state = STATE_MOBILE_CONNECTED;

                    }

                }

                else if (state == STATE_WIFI_CONNECTED)

                {

                    if (niWifi.getState() == State.DISCONNECTED || niWifi.getState() == State.DISCONNECTING)

                    {

                        state = STATE_NONE;

                        Log.d("CBR", "Wi-Fi 끊어졌다!");

                    }

                }

                else if (state == STATE_MOBILE_CONNECTED)

                {

                    if (niMobile.getState() == State.DISCONNECTED || niMobile.getState() == State.DISCONNECTING)

                    {

                        state = STATE_NONE;

                        Log.d("CBR", "3G/4G 끊어졌다!");

                    }

                }

            }

        }

        catch (Exception e)

        {

            e.printStackTrace();

        }

    }

}

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java.lang.SecurityException: ConnectivityService: Neither user 10290 nor current process has android.permission.ACCESS_NETWORK_STATE.

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