Encapsulates a simple network tool class
Can realize simple network monitoring
Determine whether the network is connected
Enter the settings to open the network
Get the type of network connection (1: WIFI network 2: wap network 3: net network)
The specific code is as follows
public class NetUtil {
/**
* 网络连通状态
*/
public static void startDialogNetSetting(final Context context, String message) {
try {
boolean online = isNetAvailable(context);
if (!online) {
AlertDialog.Builder builder = new AlertDialog.Builder(context, AlertDialog.THEME_HOLO_LIGHT);
builder.setTitle(context.getResources().getString(R.string.tip));
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setMessage(message);
builder.setPositiveButton(context.getResources().getString(R.string.net_settings),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
startNetSetting(context);
}
});
builder.setNegativeButton(context.getResources().getString(R.string.exit),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
dialog.cancel();
}
});
AlertDialog dlg = builder.create();
dlg.show();
} else {
}
} catch (Exception e) {
System.out.println("faild to show net setting");
}
}
/**
* 进入网络设置
*/
private static void startNetSetting(Context context) {
try {
context.startActivity(new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS));
} catch (Exception e) {
System.out.println("failed to startNetSetting");
}
}
public static boolean isNetAvailable(Context context) {
ConnectivityManager cManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (cManager == null) {
return false;
} else {
NetworkInfo[] info = cManager.getAllNetworkInfo();//获取设备支持的所有网络类型的链接状态信息
if (info != null)
{
for (int i = 0; i < info.length; i++)
{
if (info[i].getState() == NetworkInfo.State.CONNECTED)
{
return true;
}
}
}
}
return false;
}
public static final int NoNetWork = -1;
public static final int WiFiSNet = 1;
public static final int MOBILENet = 2;
//返回值 -1：没有网络 1：WIFI网络2：wap网络3：net网络
public static int GetNetype(Context context)
{
int netType = -1;
ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if(networkInfo==null)
{
return NoNetWork;
}
int nType = networkInfo.getType();
if(nType==ConnectivityManager.TYPE_MOBILE)
{
if(networkInfo.getExtraInfo().toLowerCase().equals("cmnet"))
{
netType = MOBILENet;
}
else
{
netType = MOBILENet;
}
}
else if(nType==ConnectivityManager.TYPE_WIFI)
{
netType = WiFiSNet;
}
return netType;
}
}