Android - 判断网络状态

Android手机同时支持WIFI和3G, 判断网络连接, 判断网络类型(WIFI或3G).

权限:

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

判断网络连接

/**
* 判断网络是否可用, 在使用网络请求是预先使用此方法进行检查, 以节省资源.
*
* @return 可用状态
*/
public static boolean isNetAvailable() {
Context context = App.getAppContext();
ConnectivityManager manager = (ConnectivityManager)
context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = manager.getActiveNetworkInfo();
return (info != null && info.isAvailable() && info.isConnected());
}

判断网络类型

ConnectivityManager conMan = (ConnectivityManager)
context.getSystemService(Context.CONNECTIVITY_SERVICE);

// 3G
State mobile = conMan.getNetworkInfo(0).getState();

// WIFI
State wifi = conMan.getNetworkInfo(1).getState();

if (mobile == NetworkInfo.State.CONNECTED
|| mobile == NetworkInfo.State.CONNECTING) {
// TODO: in mobile do something
} else if (wifi == NetworkInfo.State.CONNECTED
|| wifi == NetworkInfo.State.CONNECTING) {
// TODO: in wifi do something
}

更加精细的网络类型:

TelephonyManager#getNetworkType or NetworkInfo#getSubtypeName