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| // http://opensource.org/licenses/MIT | |
| package net.i2p.android.router.util; | |
| import android.content.Context; | |
| import android.net.ConnectivityManager; | |
| import android.net.NetworkInfo; | |
| import android.telephony.TelephonyManager; | |
| /** | |
| * Check device's network connectivity and speed. | |
| * | |
| * @author emil http://stackoverflow.com/users/220710/emil | |
| * @author str4d | |
| */ | |
| public class Connectivity { | |
| /** | |
| * Get the network info. | |
| * | |
| * @param context the Context. | |
| * @return the active NetworkInfo. | |
| */ | |
| public static NetworkInfo getNetworkInfo(Context context) { | |
| ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); | |
| return cm.getActiveNetworkInfo(); | |
| } | |
| /** | |
| * Check if there is any connectivity at all. | |
| * | |
| * @param context the Context. | |
| * @return true if we are connected to a network, false otherwise. | |
| */ | |
| public static boolean isConnected(Context context) { | |
| NetworkInfo info = Connectivity.getNetworkInfo(context); | |
| // Works on emulator and devices. | |
| // Note the use of isAvailable() - without this, isConnected() can | |
| // return true when Wifi is disabled. | |
| // http://stackoverflow.com/a/2937915 | |
| return (info != null && info.isAvailable() && info.isConnected()); | |
| } | |
| /** | |
| * Check if there is any connectivity to a Wifi network. | |
| * | |
| * @param context the Context. | |
| * @return true if we are connected to a Wifi network, false otherwise. | |
| */ | |
| public static boolean isConnectedWifi(Context context) { | |
| NetworkInfo info = Connectivity.getNetworkInfo(context); | |
| return (info != null && info.isAvailable() && info.isConnected() && | |
| info.getType() == ConnectivityManager.TYPE_WIFI); | |
| } | |
| /** | |
| * Check if there is any connectivity to a mobile network. | |
| * | |
| * @param context the Context. | |
| * @return true if we are connected to a mobile network, false otherwise. | |
| */ | |
| public static boolean isConnectedMobile(Context context) { | |
| NetworkInfo info = Connectivity.getNetworkInfo(context); | |
| return (info != null && info.isAvailable() && info.isConnected() && | |
| info.getType() == ConnectivityManager.TYPE_MOBILE); | |
| } | |
| /** | |
| * Check if there is fast connectivity. | |
| * | |
| * @param context the Context. | |
| * @return true if we have "fast" connectivity, false otherwise. | |
| */ | |
| public static boolean isConnectedFast(Context context) { | |
| NetworkInfo info = Connectivity.getNetworkInfo(context); | |
| return (info != null && info.isAvailable() && info.isConnected() && | |
| Connectivity.isConnectionFast(info.getType(), info.getSubtype())); | |
| } | |
| /** | |
| * Check if the connection is fast. | |
| * | |
| * @param type the network type. | |
| * @param subType the network subtype. | |
| * @return true if the provided type/subtype combination is classified as fast. | |
| */ | |
| public 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_CDMA: | |
| return false; // ~ 14-64 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_GPRS: | |
| return false; // ~ 100 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 | |
| /* | |
| * Above API level 7, make sure to set android:targetSdkVersion | |
| * to appropriate level to use these | |
| */ | |
| case TelephonyManager.NETWORK_TYPE_EHRPD: // API level 11 | |
| return true; // ~ 1-2 Mbps | |
| case TelephonyManager.NETWORK_TYPE_EVDO_B: // API level 9 | |
| return true; // ~ 5 Mbps | |
| case TelephonyManager.NETWORK_TYPE_HSPAP: // API level 13 | |
| return true; // ~ 10-20 Mbps | |
| case TelephonyManager.NETWORK_TYPE_IDEN: // API level 8 | |
| return false; // ~25 kbps | |
| case TelephonyManager.NETWORK_TYPE_LTE: // API level 11 | |
| return true; // ~ 10+ Mbps | |
| // Unknown | |
| case TelephonyManager.NETWORK_TYPE_UNKNOWN: | |
| default: | |
| return false; | |
| } | |
| } else { | |
| return false; | |
| } | |
| } | |
| } |
사용법 연구중
구현 방법 아시는 분 있으면 부탁 드립니다.
getcontext 에서 계속 에러가 나네요
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