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Android應用中是如何判斷網絡狀態的？針對這個問題，這篇文章詳細介紹了相對應的分析和解答，希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
實例代碼
package com.example.android;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.URL;
import java.util.Enumeration;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
public class NetStatus {
public static int NET_CNNT_BAIDU_OK = 1; // 正常訪問因特網狀態
public static int NET_CNNT_BAIDU_TIMEOUT = 2; // 無法訪問因特網狀態
public static int NET_NOT_PREPARE = 3; // 網絡未準備好
public static int NET_ERROR = 4;
private static int TIMEOUT = 3000;
/**
* 返回當前網絡狀態
*
* @param context
* @return
*/
public static int getNetState(Context context) {
try {
ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo networkinfo = connectivity.getActiveNetworkInfo();
if (networkinfo != null) {
if (networkinfo.isAvailable() && networkinfo.isConnected()) {
if (!connectionNetwork())
return NET_CNNT_BAIDU_TIMEOUT;
else
return NET_CNNT_BAIDU_OK;
} else {
return NET_NOT_PREPARE;
}
}
}
} catch (Exception e) {
}
return NET_ERROR;
}
/**
* 拼百度地址
*
* @return
*/
private static boolean connectionNetwork() {
boolean result = false;
HttpURLConnection httpUrl = null;
try {
httpUrl = (HttpURLConnection) new URL("http://www.baidu.com").openConnection();
httpUrl.setConnectTimeout(TIMEOUT);
httpUrl.connect();
result = true;
} catch (IOException e) {
} finally {
if (null != httpUrl) {
httpUrl.disconnect();
}
httpUrl = null;
}
return result;
}
/**
* 判斷當前網絡是否是3G網絡
*
* @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;
}
/**
* 判斷當前網絡是否是wifi網絡
*
* @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;
}
/**
* 判斷當前網絡是否是2G網絡
*
* @param context
* @return boolean
*/
public static boolean is2G(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
if (activeNetInfo != null && (activeNetInfo.getSubtype() == TelephonyManager.NETWORK_TYPE_EDGE
|| activeNetInfo.getSubtype() == TelephonyManager.NETWORK_TYPE_GPRS
|| activeNetInfo.getSubtype() == TelephonyManager.NETWORK_TYPE_CDMA)) {
return true;
}
return false;
}
/**
* wifi是否打開
*/
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);
}
/**
* 獲得本機ip地址
*
* @return
*/
public static String GetHostIp() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> ipAddr = intf.getInetAddresses(); ipAddr.hasMoreElements();) {
InetAddress inetAddress = ipAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) {
return inetAddress.getHostAddress();
}
}
}
} catch (SocketException ex) {
} catch (Exception e) {
}
return null;
}
/**
* 獲取本機串號imei
*
* @param context
* @return
*/
public static String getIMEI(Context context) {
TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
return telephonyManager.getDeviceId();
}
}
添加權限：訪問網絡權限
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.INTERNET"/>
關于Android應用中是如何判斷網絡狀態的問題的解答就分享到這里了，希望以上內容可以對大家有一定的幫助，如果你還有很多疑惑沒有解開，可以關注億速云行業資訊頻道了解更多相關知識。
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