android 判断网络状态

判断网络是否连接正常：

public class NetUtils {

/***

* 检测wifi网络是否已经连接正常

* 

* @param context

*            上下文

* @return 连接正常则返回true，否则返回false

*/

public static boolean isNetConnected(Context context) {

ConnectivityManager connectivityManager = (ConnectivityManager) context

.getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo networkInfo = connectivityManager

.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

NetworkInfo.State state = networkInfo.getState();

if (state == State.CONNECTED) {

return true;

} else {

return false;

}

}

/***

* 跳转到wifi设置界面

* 

* @param activity

*            当前activity

*/

public static void goWifiSetting(Activity activity) {

Intent intent = new Intent();

intent.setAction(Settings.ACTION_WIFI_SETTINGS);

activity.startActivityForResult(intent, 10);

}

2013/11/20

public final static int NONE = 0; // 无网络
public final static int WIFI = 1; // Wi-Fi
public final static int MOBILE = 2; // 3G,GPRS


/**
* 获取当前网络状态
* 
* @param context
* @return
*/
public static int getNetworkState(Context context) {
ConnectivityManager connManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);


// 手机网络判断
State state = connManager.getNetworkInfo(
ConnectivityManager.TYPE_MOBILE).getState();
if (state == State.CONNECTED || state == State.CONNECTING) {
return MOBILE;
}


// Wifi网络判断
state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
.getState();
if (state == State.CONNECTED || state == State.CONNECTING) {
return WIFI;
}
return NONE;
}