Android如何获取网络连接状态及怎样调用网络配置界面

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class NetManager {
Context context;

public NetManager(Context context) {
this.context = context;
}

// 判断网络是否可用的方法
public boolean isOpenNetwork() {
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
return false;
}

// 判断WIFI网络是否可用的方法
public boolean isOpenWifi() {
ConnectivityManager connManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mWifi = connManager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
return mWifi.isConnected();
}
}

public static void netManager(final Context a) {
netManager = new NetManager(a);

if (!netManager.isOpenNetwork()) {
// 如果网络不可用，则弹出对话框，对网络进行设置
Builder builder = new Builder(a);
builder.setTitle("没有可用的网络");
builder.setMessage("是否对网络进行设置?");
builder.setPositiveButton("确定",
new android.content.DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = null;
try {

String sdkVersion = android.os.Build.VERSION.SDK;
if (Integer.valueOf(sdkVersion) > 10) {
intent = new Intent(
android.provider.Settings.ACTION_WIRELESS_SETTINGS);
} else {
intent = new Intent();
ComponentName comp = new ComponentName(
"com.android.settings",
"com.android.settings.WirelessSettings");
intent.setComponent(comp);
intent.setAction("android.intent.action.VIEW");
}
a.startActivity(intent);
} catch (Exception e) {
e.printStackTrace();
}
}
});
builder.setNegativeButton("取消",
null);
builder.show();
}else {
Toast.makeText(a, "网络不给力，请确认网络连接", Toast.LENGTH_LONG).show();
}
}