「Android」search wifi

Android搜尋附近的wifi 基地台


1.建立一個class並etxends BroadcastReceiver，當搜尋結束後會Toast出基地台SSID

class WifiReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
    result_list = wifi_mng.getScanResults();	

     String ssid;
     for (int i = 0; i < result_list.size(); i++) {
            ssid = result_list.get(i).SSID;				
	    Toast.makeText(FirstActivity.this, ssid,                            Toast.LENGTH_LONG).show();
     }			
 }

}

2.主要程式碼，建立WifiManager後，宣告一個WifiReceiver，並且註冊此Receiver後啟動scan

wifi_mng = (WifiManager) getSystemService(FirstActivity.this.WIFI_SERVICE);
wifi_rec = new WifiReceiver();

registerReceiver(wifi_rec, new IntentFilter(
				WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

wifi_mng.startScan();

3.變數宣告

private WifiManager wifi_mng;
private WifiReceiver wifi_rec;
private List<ScanResult> result_list;

4.使用完後記得unregisterReceiver

unregisterReceiver(wifi_rec);