android 检测网络是否连接

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

package com.hui.network;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class CheckNetwork {
public boolean check(Context context) {
//取得ConnectivityManager
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = connectivityManager.getActiveNetworkInfo();
if (info == null || !connectivityManager.getBackgroundDataSetting()) {
return false;

}
//获得网络类型
int type = info.getType();
//取得链接的详细信息
int subType = info.getSubtype();

if (type == ConnectivityManager.TYPE_WIFI) {
return info.isConnected();
} else if (type == ConnectivityManager.TYPE_MOBILE) {
return info.isConnected();
} else {
return false;
}
}
}