判断相关网络状态

首先加判断网络权限

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

判断网络是否连接

网络连接管理器

ConnectivityManager connectivityManager = (ConnectivityManager)getSystemService (CONNECTIVITY_SERVICE) ;

网络信息

NetworkInfo info = connectivityManager.getActiveNetWorkInfo();

if(info != null ){
  //表示可以连接网络
}else{
  //则不能
}

//
判断是否是wifi

ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);

NetworkInfo info = connectivityManager.getActiveNetworkInfo();
        if (info != null && info.getType() == connectivityManager.TYPE_WIFI) {
            return true;
        }

判断是否是手机流量

//网络连接管理器
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
        //网络信息
        NetworkInfo info = connectivityManager.getActiveNetworkInfo();
        if (info != null && info.getType() == connectivityManager.TYPE_MOBILE) {
            return true;
        }