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Android: 获取当前的网络状态及网络连接类型

23 May 2012
android network

所需权限:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

获取连接状态:

#!java
/**
 * Checks if we have a valid Internet Connection on the device.
 * @param ctx
 * @return True if device has internet
 *
 * Code from: http://www.androidsnippets.org/snippets/131/
 */
public static boolean haveInternet(Context ctx) {

    NetworkInfo info = (NetworkInfo) ((ConnectivityManager) ctx
            .getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();

    if (info == null || !info.isConnected()) {
        return false;
    }
    if (info.isRoaming()) {
        // here is the roaming option you can change it if you want to
        // disable internet while roaming, just return false
        return false;
    }
    return true;
}

获取网络连接类型:

#!java
ConnectivityManager conMan = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
State mobile = conMan.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
State wifi = conMan.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
  
if (mobile == NetworkInfo.State.CONNECTED || mobile == NetworkInfo.State.CONNECTING) {
    //mobile
} else if (wifi == NetworkInfo.State.CONNECTED || wifi == NetworkInfo.State.CONNECTING) {
    //wifi
}