android網路代碼

① android 怎麼判斷網路狀態

獲取android系統的連接服務可判斷網路連接狀態，代碼如下
public class NetUtils{
public static boolean isNetworkConnected(Context context){
ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] infos = cm.getAllNetworkInfo();
for(NetworkInfo info:infos){
if(info.isAvailable()&&info.isConnected()){
return true;
}
}
return false;
}
}

NetworkInfo的isAvailable()和isConnected()有以下5種狀態：
在WLAN設置界面
1，顯示連接已保存，但標題欄沒有，即沒有實質連接上：isConnected()==false,isAvailable()=true
2，顯示連接已保存，標題欄也有已連接上的圖標：isConnected()==true,isAvailable()=true
3，選擇不保存後：isConnected()==false,isAvailable()=true
4，選擇連接，在正在獲取IP地址時：isConnected()==false,isAvailable()=false
5，連接上後：isConnected()==true,isAvailable()=true

② Android開發如何使用代碼配置手機wifi的pac地址

這里用到的手機型號為魅族M6120，其中的具體步驟如下：

1、打開手機的設置界面，需要選擇無線網路這一項。

③ 在android上查看wifi狀態，代碼如下：

不知道你的程序報的是什麼錯，給你一個例子吧，不過方法和你的有點差別：
public class WifiAdmin {
/**WiFi Manager**/
private WifiManager wifimanager;
/**WiFi Information**/
private WifiInfo wifiinfo;
/**Activity NetWork List**/
private List<ScanResult> netlist;
/**Configured NetWork List**/
private List<WifiConfiguration> connectedlist;
/**WiFi Lock**/
private WifiLock wifilock;

public WifiAdmin(Context context) {
wifimanager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
}

/**
* WiFi Operate
* */
/**Open WiFi**/
public void openWifi() {
if (!wifimanager.isWifiEnabled()) {
wifimanager.setWifiEnabled(true);
}
}
/**Close WiFi**/
public void closeWifi() {
if (wifimanager.isWifiEnabled()) {
wifimanager.setWifiEnabled(false);
}
}
/**WiFi State**/
public int checkState() {
return wifimanager.getWifiState();
}

/**
* WiFiLock Operate
* */
/**Create WiFiLock**/
public void creatWifiLock() {
wifilock = wifimanager.createWifiLock("Test");
}
/**Lock WiFi**/
public void acquireWifiLock() {
wifilock.acquire();
}
/**Clear WiFiLock**/
public void releaseWifiLock() {
if (wifilock.isHeld()) {
wifilock.release();
}
}
/**
* WiFiInfo Operate
* */
/**Get WiFiInfo**/
public WifiInfo getWifiInfo(){
wifiinfo = wifimanager.getConnectionInfo();
return wifiinfo;
}

/**
* NetWork Operate
* */
/**Scan**/
public void startScan() {
wifimanager.startScan();
netlist = wifimanager.getScanResults();
connectedlist = wifimanager.getConfiguredNetworks();
}
/**Get Configured NetWork**/
public List<WifiConfiguration> getConfiguration() {
return connectedlist;
}
/**Get Activity NetWork**/
public List<ScanResult> getWifiList() {
return netlist;
}
/**Connect a NetWork**/
public void connectConfiguration(int index) {
if (index < 0 || index > connectedlist.size()) {
return;
}
wifimanager.enableNetwork(connectedlist.get(index).networkId,true);
}
/**Add a NetWork**/
public void addNetwork(WifiConfiguration wcg) {
int wcgID = wifimanager.addNetwork(wcg);
wifimanager.enableNetwork(wcgID, true);
}
/**DisConnect a NetWork**/
public void disconnectWifi(int netId) {
wifimanager.disableNetwork(netId);
wifimanager.disconnect();
}
}