network: Android 网络推断（wifi、3G与其它）

悠悠 2022-03-30 03:46 204阅读 0赞

public class NetworkProber \{  
  
/\*\*  
\* 网络是否可用  
\*  
\* @param activity  
\* @return  
\*/  
public static boolean isNetworkAvailable(Context context) \{  
ConnectivityManager connectivity = (ConnectivityManager) context  
.getSystemService(Context.CONNECTIVITY\_SERVICE);  
if (connectivity == null) \{  
\} else \{  
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;  
\}  
  
/\*\*  
\* Gps是否打开  
\*  
\* @param context  
\* @return  
\*/  
public static boolean isGpsEnabled(Context context) \{  
LocationManager locationManager = ((LocationManager) context  
.getSystemService(Context.LOCATION\_SERVICE));  
List<String> accessibleProviders = locationManager.getProviders(true);  
return accessibleProviders != null && accessibleProviders.size() > 0;  
\}  
  
/\*\*  
\* wifi是否打开  
\*/  
public static boolean isWifiEnabled(Context context) \{  
ConnectivityManager mgrConn = (ConnectivityManager) context  
.getSystemService(Context.CONNECTIVITY\_SERVICE);  
TelephonyManager mgrTel = (TelephonyManager) context  
.getSystemService(Context.TELEPHONY\_SERVICE);  
return ((mgrConn.getActiveNetworkInfo() != null && mgrConn  
.getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel  
.getNetworkType() == TelephonyManager.NETWORK\_TYPE\_UMTS);  
\}  
  
/\*\*  
\* 推断当前网络是否是wifi网络  
\* if(activeNetInfo.getType()==ConnectivityManager.TYPE\_MOBILE) \{ //推断3G网  
\*  
\* @param context  
\* @return boolean  
\*/  
public static boolean isWifi(Context context) \{  
ConnectivityManager connectivityManager = (ConnectivityManager) context  
.getSystemService(Context.CONNECTIVITY\_SERVICE);  
NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();  
if (activeNetInfo != null  
&& activeNetInfo.getType() == ConnectivityManager.TYPE\_WIFI) \{  
return true;  
\}  
return false;  
\}  
  
/\*\*  
\* 推断当前网络是否是3G网络  
\*  
\* @param context  
\* @return boolean  
\*/  
public static boolean is3G(Context context) \{  
ConnectivityManager connectivityManager = (ConnectivityManager) context  
.getSystemService(Context.CONNECTIVITY\_SERVICE);  
NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();  
if (activeNetInfo != null  
&& activeNetInfo.getType() == ConnectivityManager.TYPE\_MOBILE) \{  
return true;  
\}  
return false;  
\}  
\}  
另外还有两个方法推断网络是否可用：

public static boolean isNetworkAvailable\_00(Context context) \{  
ConnectivityManager cm = ((ConnectivityManager) context  
.getSystemService(Context.CONNECTIVITY\_SERVICE));  
if (cm != null) \{  
NetworkInfo info = cm.getActiveNetworkInfo();  
if (info != null && info.isConnectedOrConnecting()) \{  
return true;  
\}  
\}  
return false;  
\}  
  
public static boolean isNetworkAvailable\_01(Context context) \{  
ConnectivityManager cm = (ConnectivityManager) context  
.getSystemService(Context.CONNECTIVITY\_SERVICE);  
NetworkInfo network = cm.getActiveNetworkInfo();  
if (network != null) \{  
return network.isAvailable();  
\}  
return false;  
\}  
更加严谨的写法：  
public static boolean checkNet(Context context) \{  
  
try \{  
ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY\_SERVICE);  
if (connectivity != null) \{  
  
NetworkInfo info = connectivity.getActiveNetworkInfo();  
if (info != null && info.isConnected()) \{  
  
if (info.getState() == NetworkInfo.State.CONNECTED) \{  
return true;  
\}  
\}  
\}  
\} catch (Exception e) \{  
return false;  
\}  
return false;  
\}