获取网络信息需要在AndroidManifest.xml文件中加入相应的权限。
1）判断是否有网络连接
- public boolean isNetworkConnected(Context context) {
- if (context != null) {
- ConnectivityManager mConnectivityManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
- if (mNetworkInfo != null) {
- return mNetworkInfo.isAvailable();
- }
- }
- return false;
- }
2）判断WIFI网络是否可用
- public boolean isWifiConnected(Context context) {
- if (context != null) {
- ConnectivityManager mConnectivityManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- NetworkInfo mWiFiNetworkInfo = mConnectivityManager
- .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
- if (mWiFiNetworkInfo != null) {
- return mWiFiNetworkInfo.isAvailable();
- }
- }
- return false;
- }
3）判断MOBILE网络是否可用
- public boolean isMobileConnected(Context context) {
- if (context != null) {
- ConnectivityManager mConnectivityManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- NetworkInfo mMobileNetworkInfo = mConnectivityManager
- .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
- if (mMobileNetworkInfo != null) {
- return mMobileNetworkInfo.isAvailable();
- }
- }
- return false;
- }
4）获取当前网络连接的类型信息
- public static int getConnectedType(Context context) {
- if (context != null) {
- ConnectivityManager mConnectivityManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
- if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {
- return mNetworkInfo.getType();
- }
- }
- return -1;
- }
android NetworkInfo类
原文：http://www.cnblogs.com/rwind/p/5481250.html
