可用的Wifi设备列表

Question

我想显示可用的Wifi设备列表.这是我的代码,我不明白这里有什么错误:

wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled() == false)
   {
Toast.makeText(getApplicationContext(), "wifi is disabled..making it enabled",Toast.LENGTH_LONG).show();
wifi.setWifiEnabled(true);
   }   
String[] str1 = null;
ArrayAdapter<String>adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,android.R.id.text1,str1);
 lv.setAdapter(adapter);
 WifiInfo info = wifi.getConnectionInfo();
textStatus.append("\n\nWiFi Status: " + info.toString());
 boolean b=wifi.isWifiEnabled();
if(b){
 wifi.setWifiEnabled(false);
Toast.makeText(getApplicationContext(), "Yes", Toast.LENGTH_SHORT).show();
enter code here

---

这是我的代码,我希望通过编程方式在Android中专门获得支持Wifi的设备属性.我怎么能得到它？

 public void onReceive(Context c, Intent intent) 
 {
 results = wifi.getScanResults();
 size = results.size();
 int i = 0;
 str1 = new String[size];
 for (ScanResult result : results){
 str1[i] = result.SSID + " " + result.level;
 i++;
 }

Answer 1

您可以通过以下方式获取可用的WIFI扫描结果

List<ScanResult> mScanResults = mWifiManager.getScanResults();

然后迭代mScanResults并使用获取SSID results.SSID.此外,如果您有兴趣获得最佳网络,您可以使用它WifiManager.compareSignalLevel(int rssiA, int rssiB)来比较两个网络.

ScanResult bestResult = null;
for(ScanResult results : mScanResults){
   Log.d("result",results.SSID);
   if(bestResult == null || WifiManager.compareSignalLevel(bestResult.level,
                                                         results.level) < 0){
      bestResult = results;
   }
}
String message = String.format("%s networks found. %s is the strongest.", 
                                           mScanResults.size(), bestResult.SSID);
Log.d("best network",message);

你可以从我的下载完整的演示repository.