网络工具类NetworkUtils
提供的方法：
打开网络设置界面 openWirelessSettings
判断网络是否可用 isAvailable
判断网络是否连接 isConnected
判断网络是否是4G is4G
判断wifi是否连接状态 isWifiConnected
获取移动网络运营商名称 getNetworkOperatorName
获取移动终端类型 getPhoneType
获取当前的网络类型(WIFI,2G,3G,4G) getNetWorkType、getNetWorkTypeName
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
/**
* 网络工具类
*/
public class NetworkUtils {
public static final int NETWORK_NO = -1; // no network
public static final int NETWORK_WIFI = 1; // wifi network
public static final int NETWORK_2G = 2; // "2G" networks
public static final int NETWORK_3G = 3; // "3G" networks
public static final int NETWORK_4G = 4; // "4G" networks
public static final int NETWORK_UNKNOWN = 5; // unknown network
private static final int NETWORK_TYPE_GSM = 16;
private static final int NETWORK_TYPE_TD_SCDMA = 17;
private static final int NETWORK_TYPE_IWLAN = 18;
/**
* 打开网络设置界面
* 3.0以下打开设置界面
*
* @param context 上下文
*/
public static void openWirelessSettings(Context context) {
if (android.os.Build.VERSION.SDK_INT > 10) {
context.startActivity(new Intent(android.provider.Settings.ACTION_SETTINGS));
} else {
context.startActivity(new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS));
}
}
/**
* 获取活动网络信息
*
* @param context 上下文
* @return NetworkInfo
*/
private static NetworkInfo getActiveNetworkInfo(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
return cm.getActiveNetworkInfo();
}
/**
* 判断网络是否可用
* 需添加权限 {@code
*
* @param context 上下文
* @return {@code true}: 可用
{@code false}: 不可用
*/
public static boolean isAvailable(Context context) {
NetworkInfo info = getActiveNetworkInfo(context);
return info != null && info.isAvailable();
}
/**
* 判断网络是否连接
* 需添加权限 {@code
*
* @param context 上下文
* @return {@code true}: 是
{@code false}: 否
*/
public static boolean isConnected(Context context) {
NetworkInfo info = getActiveNetworkInfo(context);
return info != null && info.isConnected();
}
/**
* 判断网络是否是4G
* 需添加权限 {@code
*
* @param context 上下文
* @return {@code true}: 是
{@code false}: 不是
*/
public static boolean is4G(Context context) {
NetworkInfo info = getActiveNetworkInfo(context);
return info != null && info.isAvailable() && info.getSubtype() == TelephonyManager.NETWORK_TYPE_LTE;
}
/**
* 判断wifi是否连接状态
* 需添加权限 {@code
*
* @param context 上下文
* @return {@code true}: 连接
{@code false}: 未连接
*/
public static boolean isWifiConnected(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
return cm != null && cm.getActiveNetworkInfo() != null
&& cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;
}
/**
* 获取移动网络运营商名称
* 如中国联通、中国移动、中国电信
*
* @param context 上下文
* @return 移动网络运营商名称
*/
public static String getNetworkOperatorName(Context context) {
TelephonyManager tm = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
return tm != null ? tm.getNetworkOperatorName() : null;
}
/**
* 获取移动终端类型
*
* @param context 上下文
* @return 手机制式
*
* - {@link TelephonyManager#PHONE_TYPE_NONE } : 0 手机制式未知
* - {@link TelephonyManager#PHONE_TYPE_GSM } : 1 手机制式为GSM，移动和联通
* - {@link TelephonyManager#PHONE_TYPE_CDMA } : 2 手机制式为CDMA，电信
* - {@link TelephonyManager#PHONE_TYPE_SIP } : 3
*
*/
public static int getPhoneType(Context context) {
TelephonyManager tm = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
return tm != null ? tm.getPhoneType() : -1;
}
/**
* 获取当前的网络类型(WIFI,2G,3G,4G)
* 需添加权限 {@code
*
* @param context 上下文
* @return 网络类型
*
* - {@link #NETWORK_WIFI } = 1;
* - {@link #NETWORK_4G } = 4;
* - {@link #NETWORK_3G } = 3;
* - {@link #NETWORK_2G } = 2;
* - {@link #NETWORK_UNKNOWN} = 5;
* - {@link #NETWORK_NO } = -1;
*
*/
public static int getNetWorkType(Context context) {
int netType = NETWORK_NO;
NetworkInfo info = getActiveNetworkInfo(context);
if (info != null && info.isAvailable()) {
if (info.getType() == ConnectivityManager.TYPE_WIFI) {
netType = NETWORK_WIFI;
} else if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
switch (info.getSubtype()) {
case NETWORK_TYPE_GSM:
case TelephonyManager.NETWORK_TYPE_GPRS:
case TelephonyManager.NETWORK_TYPE_CDMA:
case TelephonyManager.NETWORK_TYPE_EDGE:
case TelephonyManager.NETWORK_TYPE_1xRTT:
case TelephonyManager.NETWORK_TYPE_IDEN:
netType = NETWORK_2G;
break;
case NETWORK_TYPE_TD_SCDMA:
case TelephonyManager.NETWORK_TYPE_EVDO_A:
case TelephonyManager.NETWORK_TYPE_UMTS:
case TelephonyManager.NETWORK_TYPE_EVDO_0:
case TelephonyManager.NETWORK_TYPE_HSDPA:
case TelephonyManager.NETWORK_TYPE_HSUPA:
case TelephonyManager.NETWORK_TYPE_HSPA:
case TelephonyManager.NETWORK_TYPE_EVDO_B:
case TelephonyManager.NETWORK_TYPE_EHRPD:
case TelephonyManager.NETWORK_TYPE_HSPAP:
netType = NETWORK_3G;
break;
case NETWORK_TYPE_IWLAN:
case TelephonyManager.NETWORK_TYPE_LTE:
netType = NETWORK_4G;
break;
default:
String subtypeName = info.getSubtypeName();
if (subtypeName.equalsIgnoreCase("TD-SCDMA")
|| subtypeName.equalsIgnoreCase("WCDMA")
|| subtypeName.equalsIgnoreCase("CDMA2000")) {
netType = NETWORK_3G;
} else {
netType = NETWORK_UNKNOWN;
}
break;
}
} else {
netType = NETWORK_UNKNOWN;
}
}
return netType;
}
/**
* 获取当前的网络类型(WIFI,2G,3G,4G)
* 依赖上面的方法
*
* @param context 上下文
* @return 网络类型名称
*
* - NETWORK_WIFI
* - NETWORK_4G
* - NETWORK_3G
* - NETWORK_2G
* - NETWORK_UNKNOWN
* - NETWORK_NO
*
*/
public static String getNetWorkTypeName(Context context) {
switch (getNetWorkType(context)) {
case NETWORK_WIFI:
return "NETWORK_WIFI";
case NETWORK_4G:
return "NETWORK_4G";
case NETWORK_3G:
return "NETWORK_3G";
case NETWORK_2G:
return "NETWORK_2G";
case NETWORK_NO:
return "NETWORK_NO";
default:
return "NETWORK_UNKNOWN";
}
}
}