Android 判断网络

/**

• 判断是否有网
• @return true:有网

•      fasle:无网;
  

•      在清单文件添加读取网络状态的权限;
  

*/
public static boolean isConnection(Context context) {
if(context!=null){
// 连接管理类,
ConnectivityManager connMgr =(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo activeInfo = connMgr.getActiveNetworkInfo();
    if (activeInfo != null) {
        return activeInfo.isAvailable ();
    }
}

return false;

}

//吐司
boolean connection = NetWorkUtils.isConnection (getActivity ( ));
if (connection){
new MyasynTask (list,myAdapter).execute (urlString);
}else{
Toast.makeText (getActivity (),“请检查网络”,Toast.LENGTH_SHORT).show ();
}
return view;