可用的Wifi设备列表 [英] List of available Wifi devices

问题描述

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:

I want to display list of Available Wifi devices. This is my code, I do not understand what mistake is here:

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

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这是我的代码，我想通过编程方式专门在Android中获取启用Wifi的设备属性.我该怎么办?

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This is my code, I want to get Wifi enabled device properties specifically in Android by programmatically. How can I get that?

 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++;
 }

推荐答案

您可以通过

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

然后遍历 mScanResults 并使用 results.SSID 获得SSID.另外，如果您有兴趣获得最佳网络，可以使用 WifiManager.compareSignalLevel(int rssiA，int rssiB)比较两个网络.

Then iterating over mScanResults and getting SSID using results.SSID. Also if you are interested to get the best network you can use WifiManager.compareSignalLevel(int rssiA, int rssiB) for comparing two networks.

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);

您可以从我的 存储库 下载完整的演示.

You can download complete demo from my repository.

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