本文實(shí)例講述了android編程實(shí)現(xiàn)設(shè)置、打開wifi熱點(diǎn)共享供他人連接的方法。分享給大家供大家參考，具體如下：
用過快牙的朋友應(yīng)該知道它們在兩天設(shè)備之間傳輸文件的時(shí)候使用的是wifi熱點(diǎn)，然后另一臺便連接這個(gè)熱點(diǎn)再進(jìn)行傳輸。快牙傳輸速度驚人應(yīng)該跟它的這種機(jī)制有關(guān)系吧。不知道它的搜索機(jī)制是怎樣的，但我想應(yīng)該可以通過熱點(diǎn)的名字來進(jìn)行判斷吧。下面我們就來探討一下如何自動(dòng)創(chuàng)建一個(gè)wifi熱點(diǎn)吧
創(chuàng)建wifi熱點(diǎn)首先需要手機(jī)支持，建議開發(fā)的哥們整個(gè)好點(diǎn)的手機(jī)，我們公司那些個(gè)山寨設(shè)備，幾近有一半是不支持熱點(diǎn)的；其實(shí)創(chuàng)建熱點(diǎn)很簡單，先獲取到wifi的服務(wù)，再配置熱點(diǎn)名稱、密碼等等，然后再通過反射打開它就OK了。
下面我們看看創(chuàng)建熱點(diǎn)的代碼實(shí)現(xiàn)：
package com.tel.lajoin.wifi.hotspot;import java.lang.reflect.Method;import android.app.Activity;import android.content.Context;import android.net.wifi.WifiConfiguration;import android.net.wifi.WifiManager;import android.os.Bundle;import android.view.View;import android.widget.Button;public class HotspotActivity extends Activity { private WifiManager wifiManager; private Button open; private boolean flag=false; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.main); //獲取wifi管理服務(wù) wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); open=(Button)findViewById(R.id.open_hotspot); //通過按鈕事件設(shè)置熱點(diǎn) open.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //如果是打開狀態(tài)就關(guān)閉，如果是關(guān)閉就打開 flag=!flag; setWifiApEnabled(flag); } }); } // wifi熱點(diǎn)開關(guān) public boolean setWifiApEnabled(boolean enabled) { if (enabled) { // disable WiFi in any case //wifi和熱點(diǎn)不能同時(shí)打開，所以打開熱點(diǎn)的時(shí)候需要關(guān)閉wifi wifiManager.setWifiEnabled(false); } try { //熱點(diǎn)的配置類 WifiConfiguration apConfig = new WifiConfiguration(); //配置熱點(diǎn)的名稱(可以在名字后面加點(diǎn)隨機(jī)數(shù)什么的) apConfig.SSID = "YRCCONNECTION"; //配置熱點(diǎn)的密碼 apConfig.preSharedKey="12122112"; //通過反射調(diào)用設(shè)置熱點(diǎn) Method method = wifiManager.getClass().getMethod( "setWifiApEnabled", WifiConfiguration.class, Boolean.TYPE); //返回?zé)狳c(diǎn)打開狀態(tài) return (Boolean) method.invoke(wifiManager, apConfig, enabled); } catch (Exception e) { return false; } }}布局就不寫了吧，就一按鈕，人人都知道的東西，寫了也沒啥意思。要實(shí)現(xiàn)文件傳輸，當(dāng)然我們還需要寫一個(gè)連接熱點(diǎn)的客戶端吧。連接熱點(diǎn)的流程首先是搜索熱點(diǎn)然后再判斷熱點(diǎn)是否符合規(guī)則然后再進(jìn)行連接。
package com.tel.lajoin.wifiscan; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.wifi.ScanResult; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiManager; import android.os.Bundle; public class MainActivity extends Activity { private List<ScanResult> wifiList; private WifiManager wifiManager; private List<String> passableHotsPot; private WifiReceiver wifiReceiver; private boolean isConnected=false; private Button connect; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); init(); } /* 初始化參數(shù) */ public void init() { setContentView(R.layout.main); connect=(Button)findViewById(R.id.connect); wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); wifiReceiver = new WifiReceiver(); //通過按鈕事件搜索熱點(diǎn) connect.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { wifiManager.startScan(); } }); } /* 監(jiān)聽熱點(diǎn)變化 */ private final class WifiReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { wifiList = wifiManager.getScanResults(); if (wifiList == null || wifiList.size() == 0 || isConnected) return; onReceiveNewNetworks(wifiList); } } /*當(dāng)搜索到新的wifi熱點(diǎn)時(shí)判斷該熱點(diǎn)是否符合規(guī)格*/ public void onReceiveNewNetworks(List<ScanResult> wifiList){ passableHotsPot=new ArrayList<String>(); for(ScanResult result:wifiList){ System.out.println(result.SSID); if((result.SSID).contains("YRCCONNECTION")) passableHotsPot.add(result.SSID); } synchronized (this) { connectToHotpot(); } } /*連接到熱點(diǎn)*/ public void connectToHotpot(){ if(passableHotsPot==null || passableHotsPot.size()==0) return; WifiConfiguration wifiConfig=this.setWifiParams(passableHotsPot.get(0)); int wcgID = wifiManager.addNetwork(wifiConfig); boolean flag=wifiManager.enableNetwork(wcgID, true); isConnected=flag; System.out.println("connect success? "+flag); } /*設(shè)置要連接的熱點(diǎn)的參數(shù)*/ public WifiConfiguration setWifiParams(String ssid){ WifiConfiguration apConfig=new WifiConfiguration(); apConfig.SSID="/""+ssid+"/""; apConfig.preSharedKey="/"12122112/""; apConfig.hiddenSSID = true; apConfig.status = WifiConfiguration.Status.ENABLED; apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP); apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP); apConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK); apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP); apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP); apConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN); return apConfig; } @Override protected void onDestroy() { super.onDestroy(); /*銷毀時(shí)注銷廣播*/ unregisterReceiver(wifiReceiver); } }代碼很簡單，而且都有注釋的，相信大伙兒能夠看明白。 那就這樣吧，至于文件傳輸建議還是去看看socket相關(guān)的文章吧。
希望本文所述對大家Android程序設(shè)計(jì)有所幫助。
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