MSDK M300带屏遥控器，断开wifi没有插sim卡，运行自己开发的app，代码编写网络检测发现，网络检测一直都...
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调用方法为
NetworkUtils.isAvailable
下面是网络工具类：
package xxx.xxx.xxx;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;import java.lang.reflect.Method;
/**
* 描述：需要添加如下权限：
* <p>
* 获取无线网络状态
* <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
* 改变无线网络状态
* <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
* 改变网络状态
* <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
* 外部存储权限
* <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
* 网络基础权限
* <uses-permission android:name="android.permission.INTERNET" />
* 访问网络
* <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
*/
public class NetworkUtils {private static final String TAG = NetworkUtils.class.getSimpleName();
/**
* 获取ConnectivityManager
*/
public static ConnectivityManager getConnectivityManager(Context context) {
return (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
}/**
* 获取ConnectivityManager
*/
public static TelephonyManager getTelephonyManager(Context context) {
return (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
}/**
* 判断网络连接是否有效（此时可传输数据）。
*
* @return boolean 不管wifi，还是mobile net，只有当前在连接状态（可有效传输数据）才返回true,反之false。
*/
public static boolean isConnected(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net != null && net.isConnected();
}/**
* 获取网络类型
* 一般为移动或Wi-Fi
*
* @param context
* @return
*/
public static int getNetType(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net.getType();
}/**
* 获取网络类型名称
* 一般取值“WIFI”或“MOBILE”
*
* @param context
* @return
*/
public static String getNetTypeName(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net.getTypeName();
}/**
* 获取详细状态
*
* @param context
* @return
*/
public static NetworkInfo.DetailedState getDetailedState(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net.getDetailedState();
}/**
* 获取附加信息
*
* @param context
* @return
*/
public static String getExtraInfo(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net.getExtraInfo();
}/**
* 判断是否连接失败
*
* @param context
* @return
*/
public static boolean isFailover(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net.isFailover();
}/**
* 获取连接失败的原因
*
* @param context
* @return
*/
public static String getReason(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net.getReason();
}/**
* 判断是否漫游
*
* @param context
* @return
*/
public static boolean isRoaming(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net.isRoaming();
}/**
* 判断有无网络正在连接中（查找网络、校验、获取IP等）。
*
* @return boolean 不管wifi，还是mobile net，只有当前在连接状态（可有效传输数据）才返回true,反之false。
*/
public static boolean isConnectedOrConnecting(Context context) {
NetworkInfo[] nets = getConnectivityManager(context).getAllNetworkInfo();
if (nets != null) {
for (NetworkInfo net : nets) {
if (net.isConnectedOrConnecting()) {
return true;
}
}
}
return false;
}public static NetType getConnectedType(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
if (net != null) {
switch (net.getType()) {
case ConnectivityManager.TYPE_WIFI:
return NetType.Wifi;
case ConnectivityManager.TYPE_MOBILE:
return NetType.Mobile;
default:
return NetType.Other;
}
}
return NetType.None;
}/**
* 是否存在有效的WIFI连接
*/
public static boolean isWifiConnected(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net != null && net.getType() == ConnectivityManager.TYPE_WIFI && net.isConnected();
}/**
* 是否存在有效的移动连接
*
* @return boolean
*/
public static boolean isMobileConnected(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
return net != null && net.getType() == ConnectivityManager.TYPE_MOBILE && net.isConnected();
}/**
* 检测网络是否为可用状态
*/
public static boolean isAvailable(Context context) {
return isWifiAvailable(context) || (isMobileAvailable(context) && isMobileEnabled(context));
}/**
* 判断是否有可用状态的Wifi，以下情况返回false：
* 1. 设备wifi开关关掉;
* 2. 已经打开飞行模式；
* 3. 设备所在区域没有信号覆盖；
* 4. 设备在漫游区域，且关闭了网络漫游。
*
* @return boolean wifi为可用状态（不一定成功连接，即Connected）即返回ture
*/
public static boolean isWifiAvailable(Context context) {
NetworkInfo[] nets = getConnectivityManager(context).getAllNetworkInfo();
if (nets != null) {
for (NetworkInfo net : nets) {
if (net.getType() == ConnectivityManager.TYPE_WIFI) {
return net.isAvailable();
}
}
}
return false;
}/**
* 判断有无可用状态的移动网络，注意关掉设备移动网络直接不影响此函数。
* 也就是即使关掉移动网络，那么移动网络也可能是可用的(彩信等服务)，即返回true。
* 以下情况它是不可用的，将返回false：
* 1. 设备打开飞行模式；
* 2. 设备所在区域没有信号覆盖；
* 3. 设备在漫游区域，且关闭了网络漫游。
*
* @return boolean
*/
public static boolean isMobileAvailable(Context context) {
NetworkInfo[] nets = getConnectivityManager(context).getAllNetworkInfo();
if (nets != null) {
for (NetworkInfo net : nets) {
if (net.getType() == ConnectivityManager.TYPE_MOBILE) {
return net.isAvailable();
}
}
}
return false;
}/**
* 设备是否打开移动网络开关
*
* @return boolean 打开移动网络返回true，反之false
*/
public static boolean isMobileEnabled(Context context) {
try {
Method getMobileDataEnabledMethod = ConnectivityManager.class.getDeclaredMethod("getMobileDataEnabled");
getMobileDataEnabledMethod.setAccessible(true);
return (Boolean) getMobileDataEnabledMethod.invoke(getConnectivityManager(context));
} catch (Exception e) {
e.printStackTrace();
LogUtils.e("Error", "" + e);
}
// 反射失败，默认开启
return true;
}/**
* 打印当前各种网络状态
*
* @return boolean
*/
public static boolean printNetworkInfo(Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo in = connectivity.getActiveNetworkInfo();
LogUtils.i(TAG, "getActiveNetworkInfo: " + in);
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
// if (info[i].getType() == ConnectivityManager.TYPE_WIFI) {
LogUtils.i(TAG, "NetworkInfo[" + i + "]isAvailable : " + info[i].isAvailable());
LogUtils.i(TAG, "NetworkInfo[" + i + "]isConnected : " + info[i].isConnected());
LogUtils.i(TAG, "NetworkInfo[" + i + "]isConnectedOrConnecting : " + info[i].isConnectedOrConnecting());
LogUtils.i(TAG, "NetworkInfo[" + i + "]: " + info[i]);
// }
}
LogUtils.i(TAG, "\n");
} else {
LogUtils.i(TAG, "getAllNetworkInfo is null");
}
}
return false;
}/**
* 获得连接的网络类型
* <p>
* such as WIFI, MOBILE, ETHERNET, BLUETOOTH, etc.
*
* @return {@link ConnectivityManager#TYPE_WIFI}, {@link ConnectivityManager#TYPE_MOBILE},
* {@link ConnectivityManager#TYPE_ETHERNET}...
*/
public static int getConnectedTypeINT(Context context) {
NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo();
if (net != null) {
LogUtils.i(TAG, "NetworkInfo: " + net.toString());
return net.getType();
}
return -1;
}/**
* 获得手机网络类型
* <p>
* such as 2G, 3G, 4G, etc.
*
* @return {@link TelephonyManager#NETWORK_TYPE_CDMA}, {@link TelephonyManager#NETWORK_TYPE_GPRS},
* {@link TelephonyManager#NETWORK_TYPE_LTE}...
*/
public static int getTelNetworkTypeINT(Context context) {
return getTelephonyManager(context).getNetworkType();
}/**
* GPRS 2G(2.5) General Packet Radia Service 114kbps
* EDGE 2G(2.75G) Enhanced Data Rate for GSM Evolution 384kbps
* UMTS 3G WCDMA 联通3G Universal Mobile Telecommunication System 完整的3G移动通信技术标准
* CDMA 2G 电信 Code Division Multiple Access 码分多址
* EVDO_0 3G (EVDO 全程 CDMA2000 1xEV-DO) Evolution - Data Only (Data Optimized) 153.6kps - 2.4mbps 属于3G
* EVDO_A 3G 1.8mbps - 3.1mbps 属于3G过渡，3.5G
* 1xRTT 2G CDMA2000 1xRTT (RTT - 无线电传输技术) 144kbps 2G的过渡,
* HSDPA 3.5G 高速下行分组接入 3.5G WCDMA High Speed Downlink Packet Access 14.4mbps
* HSUPA 3.5G High Speed Uplink Packet Access 高速上行链路分组接入 1.4 - 5.8 mbps
* HSPA 3G (分HSDPA,HSUPA) High Speed Packet Access
* IDEN 2G Integrated Dispatch Enhanced Networks 集成数字增强型网络 （属于2G，来自维基百科）
* EVDO_B 3G EV-DO Rev.B 14.7Mbps 下行 3.5G
* LTE 4G Long Term Evolution FDD-LTE 和 TDD-LTE , 3G过渡，升级版 LTE Advanced 才是4G
* EHRPD 3G CDMA2000向LTE 4G的中间产物 Evolved High Rate Packet Data HRPD的升级
* HSPAP 3G HSPAP 比 HSDPA 快些
*
* @return {@link NetWorkType}
*/
public static NetWorkType getNetworkType(Context context) {
int type = getConnectedTypeINT(context);
switch (type) {
case ConnectivityManager.TYPE_WIFI:
return NetWorkType.Wifi;
case ConnectivityManager.TYPE_MOBILE:
case ConnectivityManager.TYPE_MOBILE_DUN:
case ConnectivityManager.TYPE_MOBILE_HIPRI:
case ConnectivityManager.TYPE_MOBILE_MMS:
case ConnectivityManager.TYPE_MOBILE_SUPL:
int teleType = getTelephonyManager(context).getNetworkType();
switch (teleType) {
case TelephonyManager.NETWORK_TYPE_GPRS:
case TelephonyManager.NETWORK_TYPE_EDGE:
case TelephonyManager.NETWORK_TYPE_CDMA:
case TelephonyManager.NETWORK_TYPE_1xRTT:
case TelephonyManager.NETWORK_TYPE_IDEN:
return NetWorkType.Net2G;
case TelephonyManager.NETWORK_TYPE_UMTS:
case TelephonyManager.NETWORK_TYPE_EVDO_0:
case TelephonyManager.NETWORK_TYPE_EVDO_A:
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:
return NetWorkType.Net3G;
case TelephonyManager.NETWORK_TYPE_LTE:
return NetWorkType.Net4G;
default:
return NetWorkType.UnKnown;
}
default:
return NetWorkType.UnKnown;
}
}public enum NetType {
None(1),
Mobile(2),
Wifi(4),
Other(8);public int value;
NetType(int value) {
this.value = value;
}
}public enum NetWorkType {
UnKnown(-1),
Wifi(1),
Net2G(2),
Net3G(3),
Net4G(4);public int value;
NetWorkType(int value) {
this.value = value;
}
}
}
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