デバイスがWi-Fi共有モードになっているときにSSIDを取得

Question

告知：devifがWi-Fi共有モードになっているときに他のSSIDのリストを取得できますか？

Answer 1

あなたはあなたの活動のためにBroadcastReceiverを登録する必要がありますが、ネットワークの状態にアクセスし、あなたのマニフェストにそれを変更する権限を追加する必要があります前に：

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission> 
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission> 

我々はBroadcastReceiverたちを作​​成する前にいくつかのことを設定する必要があります。

ArrayList<String> ssidList; 
WifiManager wifiManager; 
WifiScanReceiver wifiReciever; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_options); 

    //Wifi manager will be used to request a scan 
    wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 

    //Your boradcast receiver, it will be registered with the system to be notified of SSID's available 
    wifiReciever = new WifiScanReceiver(); 

    //A list to add all the available SSID's 
    ssidList = new ArrayList<String>(); 

    //Requesting a scan, results will be returned through the BroadcastReceiver 
    wifiManager.startScan(); 
} 

これはあなたのBoradcastReceiver

です

protected void onPause() { 
    unregisterReceiver(wifiReciever); 
    super.onPause(); 
} 

protected void onResume() { 
    registerReceiver(wifiReciever, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); 
    super.onResume(); 
} 

これは完全なコードです：

public class WifiActivity extends AppCompatActivity { 

    ArrayList<String> ssidList; 
    WifiManager wifiManager; 
    WifiScanReceiver wifiReciever; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     //Wifi manager will be used to request a scan 
     wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 

     //Your boradcast receiver, it will be registered with the system to be notified of SSID's available 
     wifiReciever = new WifiScanReceiver(); 

     //A list to add all the available SSID's 
     ssidList = new ArrayList<String>(); 

     //Requesting a scan, results will be returned through the BroadcastReceiver 
     wifiManager.startScan(); 
    } 

    protected void onPause() { 
     unregisterReceiver(wifiReciever); 
     super.onPause(); 
    } 

    protected void onResume() { 
     registerReceiver(wifiReciever, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); 
     super.onResume(); 
    } 

    class WifiScanReceiver extends BroadcastReceiver { 

     public void onReceive(Context c, Intent intent) { 
      List<ScanResult> wifiScanList = wifiManager.getScanResults(); 
      ssidList.clear(); // clear to make sure we do not get duplicated entries 

      for (int i = 0; i < wifiScanList.size(); i++) { 
       String ssid = wifiScanList.get(i).SSID; //Get the SSID 
       ssidList.add(ssid); //add SSID to the list 
       Log.d("SSID", ssid); 
      } 

      //You can call this to keep scaning if you need to, or you can set up a Timer to scan every X seconds 
      //wifiManager.startScan(); 
     } 
    } 
} 

たびに必要になりますonReceive実行あなたは、あなたのアプリがonResumeを呼び出し、それがを呼び出したときに登録解除するときprefereably BroadcastReceiverを登録する必要があり

class WifiScanReceiver extends BroadcastReceiver { 

    public void onReceive(Context c, Intent intent) { 
     List<ScanResult> wifiScanList = wifiManager.getScanResults(); 
     ssidList.clear(); // clear to make sure we do not get duplicated entries 

     for (int i = 0; i < wifiScanList.size(); i++) { 
      String ssid = wifiScanList.get(i).SSID; //Get the SSID 
      ssidList.add(ssid); //add SSID to the list 
      Log.d("SSID", ssid); 
     } 

     //You can call this to keep scaning if you need to, or you can set up a Timer to scan every X seconds 
     //wifiManager.startScan(); 
    } 
} 

利用可能なすべてのSSIDの一覧を取得し、ssidListに保存されます。

Answer 2

お試しくださいanswer

public class WiFiDemo extends Activity implements OnClickListener 
{  
    WifiManager wifi;  
    ListView lv; 
    TextView textStatus; 
    Button buttonScan; 
    int size = 0; 
    List<ScanResult> results; 

    String ITEM_KEY = "key"; 
    ArrayList<HashMap<String, String>> arraylist = new ArrayList<HashMap<String, String>>(); 
    SimpleAdapter adapter; 

    /* Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     textStatus = (TextView) findViewById(R.id.textStatus); 
     buttonScan = (Button) findViewById(R.id.buttonScan); 
     buttonScan.setOnClickListener(this); 
     lv = (ListView)findViewById(R.id.list); 

     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); 
     } 
     this.adapter = new SimpleAdapter(WiFiDemo.this, arraylist, R.layout.row, new String[] { ITEM_KEY }, new int[] { R.id.list_value }); 
     lv.setAdapter(this.adapter); 

     registerReceiver(new BroadcastReceiver() 
     { 
      @Override 
      public void onReceive(Context c, Intent intent) 
      { 
       results = wifi.getScanResults(); 
       size = results.size(); 
      } 
     }, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));      
    } 

    public void onClick(View view) 
    { 
     arraylist.clear();   
     wifi.startScan(); 

     Toast.makeText(this, "Scanning...." + size, Toast.LENGTH_SHORT).show(); 
     try 
     { 
      size = size - 1; 
      while (size >= 0) 
      { 
       HashMap<String, String> item = new HashMap<String, String>();      
       item.put(ITEM_KEY, results.get(size).SSID + " " + results.get(size).capabilities); 

       arraylist.add(item); 
       size--; 
       adapter.notifyDataSetChanged();     
      } 
     } 
     catch (Exception e) 
     { }   
    }  
}