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ADD: 网络工具类补充判断网络是否已连接和是否为高速网络的方法
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@Masson
Masson committed Jan 27, 2014
1 parent c889a28 commit cf695a5
Showing 1 changed file with 134 additions and 31 deletions.
165 changes: 134 additions & 31 deletions DroidShake/src/com/imasson/droidshake/util/NetworkUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,12 +3,14 @@
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
import android.util.Log;

/**
* <p>用于进行网络相关操作的工具类</p>
*
* @version 1.0 包含基本的判断网络状态的方法
* @version 2.0 更新判断是否已连接网络的方法，并增加判断网络是否为高速网络的方法
*/
public final class NetworkUtils {
private static final String TAG = "NetworkUtils";
Expand All @@ -20,18 +22,18 @@ public final class NetworkUtils {
* 要判断网络是否已经连接上，请使用{@link #isNetworkConnected(Context)}。</p>
* @param context 上下文对象，不能为空
* @return 当前设备的网络是否可用
* @see #isNetworkConnected(Context)
* @see #isConnected(Context)
*/
public static boolean isNetworkAvaliable(Context context) {
public static boolean isAvaliable(Context context) {
if (context == null) {
Log.w(TAG, "Argument 'context' is null at isNetworkAvaliable(Context)");
Log.w(TAG, "Argument 'context' is null at isAvaliable(Context)");
return false;
}

ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager == null) {
Log.w(TAG, "Can't not fetch ConnectivityManager at isNetworkAvaliable(Context)");
Log.w(TAG, "Can't not fetch ConnectivityManager at isAvaliable(Context)");
return false;
}

Expand All @@ -50,40 +52,141 @@ public static boolean isNetworkAvaliable(Context context) {
return isAvaliable;
}

/**

private static NetworkInfo getNetworkInfo(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager == null) {
Log.w(TAG, "Can't not fetch ConnectivityManager at getNetworkInfo(Context)");
return null;
}
return connectivityManager.getActiveNetworkInfo();
}

/**
* <p>判断当前设备是否已经连接上网络</p>
* @param context 上下文对象，不能为空
* @return 当前设备是否已经连接上网络
* @see #isNetworkAvaliable(Context)
* @see #isAvaliable(Context)
* @see #isConnectedMobile(Context)
* @see #isConnectedFast(Context)
*/
public static boolean isNetworkConnected(Context context) {
if (context == null) {
Log.w(TAG, "Argument 'context' is null at isNetworkConnected(Context)");
return false;
}
public static boolean isConnected(Context context) {
NetworkInfo info = getNetworkInfo(context);
return (info != null && info.isConnected());
}

/**
* <p>判断当前设备是否正在使用WIFI网络</p>
* @param context 上下文对象，不能为空
* @return 当前设备是否正在使用WIFI网络
* @see #isConnectedMobile(Context)
* @see #isConnectedFast(Context)
*/
public static boolean isConnectedWifi(Context context) {
NetworkInfo info = getNetworkInfo(context);
return (info != null && info.isConnected() &&
info.getType() == ConnectivityManager.TYPE_WIFI);
}

/**
* <p>判断当前设备是否正在使用移动网络（包括2G~4G等所有移动网络）</p>
* @param context 上下文对象，不能为空
* @return 当前设备是否正在使用移动网络
* @see #isConnectedWifi(Context)
* @see #isConnectedFast(Context)
*/
public static boolean isConnectedMobile(Context context) {
NetworkInfo info = getNetworkInfo(context);
return (info != null && info.isConnected() &&
info.getType() == ConnectivityManager.TYPE_MOBILE);
}

/**
* <p>判断当前设备是否正在使用高速的移动网络（包括3G~4G等移动网络）</p>
* @param context 上下文对象，不能为空
* @return 当前设备是否正在使用高速的移动网络
* @see #isConnectedWifi(Context)
* @see #isConnectedFast(Context)
*/
public static boolean isConnectedFast(Context context) {
NetworkInfo info = getNetworkInfo(context);
return (info != null && info.isConnected() &&
isConnectionFast(info.getType(), info.getSubtype()));
}

private static boolean isConnectionFast(int type, int subType) {
if (type == ConnectivityManager.TYPE_WIFI) {
return true;
} else if (type == ConnectivityManager.TYPE_MOBILE) {
switch (subType) {
case TelephonyManager.NETWORK_TYPE_1xRTT:
return false; // ~ 50-100 kbps
case TelephonyManager.NETWORK_TYPE_IDEN: // API level 8
return false; // ~25 kbps
case TelephonyManager.NETWORK_TYPE_CDMA:
return false; // ~ 14-64 kbps
case TelephonyManager.NETWORK_TYPE_GPRS:
return false; // ~ 100 kbps
case TelephonyManager.NETWORK_TYPE_EDGE:
return false; // ~ 50-100 kbps
case TelephonyManager.NETWORK_TYPE_EVDO_0:
return true; // ~ 400-1000 kbps
case TelephonyManager.NETWORK_TYPE_EVDO_A:
return true; // ~ 600-1400 kbps
case TelephonyManager.NETWORK_TYPE_HSDPA:
return true; // ~ 2-14 Mbps
case TelephonyManager.NETWORK_TYPE_HSPA:
return true; // ~ 700-1700 kbps
case TelephonyManager.NETWORK_TYPE_HSUPA:
return true; // ~ 1-23 Mbps
case TelephonyManager.NETWORK_TYPE_UMTS:
return true; // ~ 400-7000 kbps
/*
* 对于 API Level >8 的网络类型，使用 TelephonyManagerCompat 类中的常量
*/
case TelephonyManagerCompat.NETWORK_TYPE_EHRPD:
return true; // ~ 1-2 Mbps
case TelephonyManagerCompat.NETWORK_TYPE_EVDO_B:
return true; // ~ 5 Mbps
case TelephonyManagerCompat.NETWORK_TYPE_HSPAP:
return true; // ~ 10-20 Mbps
case TelephonyManagerCompat.NETWORK_TYPE_LTE:
return true; // ~ 10+ Mbps
// Unknown
case TelephonyManager.NETWORK_TYPE_UNKNOWN:
default:
return false;
}
} else {
return false;
}
}

/**
* {@link TelephonyManager}的兼容类，包含多个 API Level >8 的常量
*/
public static final class TelephonyManagerCompat {
/**
* Current network is EVDO revision
*/
public static final int NETWORK_TYPE_EVDO_B = 12; // API level 9

ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager == null) {
Log.w(TAG, "Can't not fetch ConnectivityManager at isNetworkConnected(Context)");
return false;
}
/**
* Current network is LTE
*/
public static final int NETWORK_TYPE_LTE = 13; // API level 11

boolean isConnected = false;
NetworkInfo[] infos = connectivityManager.getAllNetworkInfo();
if (infos != null) {
for (int i = infos.length - 1; i >= 0; i--) {
NetworkInfo info = infos[i];
if (info != null && info.isConnected()) {
isConnected = true;
break;
}
}
}

return isConnected;
/**
* Current network is eHRPD
*/
public static final int NETWORK_TYPE_EHRPD = 14; // API level 11

/**
* Current network is HSPA+
*/
public static final int NETWORK_TYPE_HSPAP = 15; // API level 13
}


private NetworkUtils() { }
}

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