package com.juchao.upg.android.util;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
public class NetUtil {
static public NetworkInfo getActiveNetInfo(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
return connectivityManager.getActiveNetworkInfo();
}
static public boolean isOk(Context context) {
NetworkInfo networkInfo = getActiveNetInfo(context);
return (networkInfo != null && networkInfo.isAvailable());
}
static public boolean isNetworkConnected(Context context) {
NetworkInfo networkInfo = getActiveNetInfo(context);
//有的时候网络有链接，但是不可用。
return (networkInfo != null && networkInfo.isConnected() );
}
static public boolean isConnectedOrConnecting(Context context) {
NetworkInfo networkInfo = getActiveNetInfo(context);
return (networkInfo != null && networkInfo.isConnectedOrConnecting());
}
static public boolean isConnect2G(Context context){
NetworkInfo networkInfo = getActiveNetInfo(context);
if (networkInfo == null || !networkInfo.isConnectedOrConnecting())return false;;
int type = networkInfo.getType();
int subType = networkInfo.getSubtype();
if(type==ConnectivityManager.TYPE_MOBILE){
switch(subType){
case TelephonyManager.NETWORK_TYPE_GPRS:
return true; // ~ 100 kbps
case TelephonyManager.NETWORK_TYPE_CDMA:
return true; // ~ 14-64 kbps
case TelephonyManager.NETWORK_TYPE_1xRTT:
return true; // ~ 50-100 kbps
case TelephonyManager.NETWORK_TYPE_EDGE:
return true; // ~ 50-100 kbps
default:
return false;
}
}else{
return false;
}
}
}

/**
* 2009-12-5
*/
package com.juchao.upg.android.util;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;
public class NetUtils {
/**
* 检查网络是否已连接
* @param context
* @return
*/
public static boolean isNetworkConnected(Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = connectivity.getActiveNetworkInfo();
if (info != null && info.isConnected()) {
return true;
}
return false;
}
/**
* 检测网络连接时网络类型
* @param context
* @return
*/
public static int getNetConectionedType(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
int netConectionType = -1;
if (activeNetInfo != null && activeNetInfo.isConnected()) {
return activeNetInfo.getType();
}
return netConectionType;
}
/**
* 打开wifi开关
* @param context
*/
public static void openWifi(Context context)
{
WifiManager wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(true);
}
/**
* 关闭wifi开关
* @param context
*/
public static void closeWifi(Context context)
{
WifiManager wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(false);
}
}

package com.juchao.upg.android.util;
import android.content.Context;
import android.widget.Toast;
public class ToastUtil {
public static void showLongToast(Context context , String msg){
Toast.makeText(context, msg, Toast.LENGTH_LONG).show();
}
public static void showShortToast(Context context , String msg){
Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
}
}