网络判断

网络判断的方法：

public boolean isNetworkConnected(Context context) {
        if (context != null) {
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
            if (mNetworkInfo != null) {

                return mNetworkInfo.isAvailable();

            }
        }
        return false;
    }

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