android工具类（2）NetWorkHelper 网络工具类

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.net.NetworkInfo.State;
import android.telephony.TelephonyManager;
import android.util.Log;

public class NetWorkHelper {
    public static final int NETWORN_NONE = 0;
    public static final int NETWORN_WIFI = 1;
    public static final int NETWORN_MOBILE = 2;
private static String LOG_TAG = "NetWorkHelper";

public static Uri uri = Uri.parse("content://telephony/carriers");

/**
 * 判断是否有网络
 */
public static boolean isNetworkAvailable(Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);

if (connectivity == null) {
Log.w(LOG_TAG, "couldn't get connectivity manager");
} else {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].isAvailable()) {
Log.d(LOG_TAG, "network is available");
return true;
}
}
}
}
Log.d(LOG_TAG, "network is not available");
return false;
}
/**
 * 检查网络状态
 * @param context
 * @return
 */
public static boolean checkNetState(Context context){
    boolean netstate = false;
ConnectivityManager connectivity = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
if(connectivity != null)
{
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++)
{
if (info[i].getState() == NetworkInfo.State.CONNECTED) 
{
netstate = true;
break;
}
}
}
}
return netstate;
    }

/**
 * 判断网络是否为漫游
 */
public static boolean isNetworkRoaming(Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity == null) {
Log.w(LOG_TAG, "couldn't get connectivity manager");
} else {
NetworkInfo info = connectivity.getActiveNetworkInfo();
if (info != null
&& info.getType() == ConnectivityManager.TYPE_MOBILE) {
TelephonyManager tm = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
if (tm != null && tm.isNetworkRoaming()) {
Log.d(LOG_TAG, "network is roaming");
return true;
} else {
Log.d(LOG_TAG, "network is not roaming");
}
} else {
Log.d(LOG_TAG, "not using mobile network");
}
}
return false;
}

/**
 * 判断MOBILE网络是否可用
 * 
 * @param context
 * @return
 * @throws Exception
 */
public static boolean isMobileDataEnable(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
boolean isMobileDataEnable = false;

isMobileDataEnable = connectivityManager.getNetworkInfo(
ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();

return isMobileDataEnable;
}


/**
 * 判断wifi 是否可用
 * @param context
 * @return
 * @throws Exception
 */
public static boolean isWifiDataEnable(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
boolean isWifiDataEnable = false;
isWifiDataEnable = connectivityManager.getNetworkInfo(
ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();
return isWifiDataEnable;
}


    public static int getNetworkState(Context context){
        ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        //Wifi
        State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
        if(state == State.CONNECTED||state == State.CONNECTING){
            return NETWORN_WIFI;
        }

        //3G
        state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
        if(state == State.CONNECTED||state == State.CONNECTING){
            return NETWORN_MOBILE;
        }
        return NETWORN_NONE;
    }

}