判断Android设备是否连接网络
16lz
2021-12-04
/** * 判断Android客户端网络是否连接 * @param context * @return 真假 */public static boolean checkNet(Context context) { try { ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity != null) { NetworkInfo info = connectivity.getActiveNetworkInfo(); if (info != null && info.isConnected()) { if (info.getState() == NetworkInfo.State.CONNECTED) { return true; } } } } catch (Exception e) { return false; } return false; }
以上代码只能判断是否有可用的连接,而不能判断是否能连网
* 检验网络连接 并toast提示* * @return*/public boolean note_Intent(Context context) {ConnectivityManager con = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo networkinfo = con.getActiveNetworkInfo();if (networkinfo == null || !networkinfo.isAvailable()) {// 当前网络不可用Toast.makeText(context.getApplicationContext(), "请先连接Internet!",Toast.LENGTH_SHORT).show();return false;}boolean wifi = con.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();if (!wifi) { // 提示使用wifiToast.makeText(context.getApplicationContext(), "建议您使用WIFI以减少流量!",Toast.LENGTH_SHORT).show();}return true;}
以上转自:http://www.iteye.com/topic/1117733
android中判断网络连接是否可用
http://www.cnblogs.com/codeworker/archive/2012/04/23/2467180.html
一、判断网络连接是否可用
public static boolean isNetworkAvailable(Context context) { ConnectivityManager cm = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (cm == null) { } else { //如果仅仅是用来判断网络连接 //则可以使用 cm.getActiveNetworkInfo().isAvailable(); NetworkInfo[] info = cm.getAllNetworkInfo(); if (info != null) { for (int i = 0; i < info.length; i++) { if (info[i].getState() == NetworkInfo.State.CONNECTED) { return true; } } } } return false; }
二、判断GPS是否打开
public static boolean isGpsEnabled(Context context) { LocationManager lm = ((LocationManager) context .getSystemService(Context.LOCATION_SERVICE)); List<String> accessibleProviders = lm.getProviders(true); return accessibleProviders != null && accessibleProviders.size() > 0; }
三、判断WIFI是否打开
public static boolean isWifiEnabled(Context context) { ConnectivityManager mgrConn = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); TelephonyManager mgrTel = (TelephonyManager) context .getSystemService(Context.TELEPHONY_SERVICE); return ((mgrConn.getActiveNetworkInfo() != null && mgrConn .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS); }
四、判断是否是3G网络
public static boolean is3rd(Context context) { ConnectivityManager cm = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkINfo = cm.getActiveNetworkInfo(); if (networkINfo != null && networkINfo.getType() == ConnectivityManager.TYPE_MOBILE) { return true; } return false; }
五、判断是wifi还是3g网络,用户的体现性在这里了,wifi就可以建议下载或者在线播放。
public static boolean isWifi(Context context) { ConnectivityManager cm = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkINfo = cm.getActiveNetworkInfo(); if (networkINfo != null && networkINfo.getType() == ConnectivityManager.TYPE_WIFI) { return true; } return false; }
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