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;    }}
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