Android - 如何扫描接入点并选择最强的信号？

Question

我目前正在尝试在Android中编写一个类来扫描接入点,计算哪个接入点具有最佳信号,然后连接到该接入点.

因此,应用程序将能够在移动中扫描并随时附加到新的接入点.

我有扫描和计算最好的信号工作.

但是当涉及到附加到最佳接入点时,我遇到了麻烦.

似乎enableNetwork(netid,othersTrueFalse)是附加到Access点的唯一方法,但这会导致我的扫描结果出现问题我无法获得信号最强的接入点的id.

这是我的代码:

---

public void doWifiScan(){

  scanTask = new TimerTask() {
  public void run() {
      handler.post(new Runnable() {
          public void run() {
               sResults = wifiManager.scan(getBaseContext()); 
               if(sResults!=null)
               Log.d("TIMER", "sResults count" + sResults.size());
               ScanResult scan = wifiManager.calculateBestAP(sResults);
               wifiManager.addNewAccessPoint(scan);
           }
       });
    }};

    t.schedule(scanTask, 3000, 30000); 
}

---

public ScanResult calculateBestAP(List<ScanResult> sResults){

     ScanResult bestSignal = null;
        for (ScanResult result : sResults) {
          if (bestSignal == null
              || WifiManager.compareSignalLevel(bestSignal.level, result.level) < 0)
            bestSignal = result;
        }

        String message = String.format("%s networks found. %s is the strongest. %s is the bsid",
                sResults.size(), bestSignal.SSID, bestSignal.BSSID);

        Log.d("sResult", message);
        return bestSignal;
}

---

public void addNewAccessPoint(ScanResult scanResult){

    WifiConfiguration wc = new WifiConfiguration();
    wc.SSID = '\"' + scanResult.SSID + '\"';
    //wc.preSharedKey  = "\"password\"";
    wc.hiddenSSID = true;
    wc.status = WifiConfiguration.Status.ENABLED;        
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
    wc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
    wc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
    int res = mainWifi.addNetwork(wc);
    Log.d("WifiPreference", "add Network returned " + res );
    boolean b = mainWifi.enableNetwork(res, false);        
    Log.d("WifiPreference", "enableNetwork returned " + b );

}

---

当我尝试使用addNewAccessPoint(ScanResult scanResult)时,它只是将另一个AP添加到设置应用程序中的列表,其名称与具有最佳信号的名称相同,因此我最终得到了大量重复项而不是实际附加到它们.

有人能指出我更好的解决方案吗？

Answer 1

只需改变

boolean b = mainWifi.enableNetwork(res, false);

到

boolean b = mainWifi.enableNetwork(res, true);