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I got this code that i want to scan for the networks and then write it all to the listview. But the problem is that the ssid and bssid doesnt show. Everything else shows but not the ssid.

Also what is the best way to update the listview every second so you can see the signal strenghts actual signal?

import java.util.List;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.example.wifi.R;

public class MainActivity extends Activity {

    WifiManager wifiManager;
    WifiScanReceiver wifiReciever;
    ListView list;
    String wifis[];
    WifiInfo wifiInfo;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        list = (ListView) findViewById(R.id.text);
        wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
        wifiReciever = new WifiScanReceiver();
        wifiInfo = wifiManager.getConnectionInfo();
        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 {
        @SuppressLint("UseValueOf")
        public void onReceive(Context c, Intent intent) {
            List<ScanResult> wifiScanList = wifiManager.getScanResults();
            wifis = new String[wifiScanList.size()];
            for (int i = 0; i < wifiScanList.size(); i++) {
                wifis[i] = ((wifiScanList.get(i)).toString());
            }

            list.setAdapter(new ArrayAdapter<String>(getApplicationContext(),
                    android.R.layout.simple_list_item_1, wifis));
        }
    }
}
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1 に答える 1

2

andを使用してオブジェクトからSSIDandを取得できます。次に、 から返された他のデータに追加します。BSSIDScanResultwifiScanList.get(i).SSIDwifiScanList.get(i).BSSIDtoString()

こちらのドキュメントを参照してください。

ArrayAdapterまず、 yourをインスタンス変数として宣言し、次のようsetAdapter()に呼び出しonCreate()ます。

ArrayAdapter adapter;
ListView list;
ArrayList<String> wifis;
WifiInfo wifiInfo;
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    list = (ListView) findViewById(R.id.text);
    wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    wifiReciever = new WifiScanReceiver();
    wifiInfo = wifiManager.getConnectionInfo();

    wifis = new ArrayList<String>(); //initialize wifis
    wifis.add("loading...");
    adapter = new ArrayAdapter<String>(getApplicationContext(),
                        android.R.layout.simple_list_item_1, wifis)
    list.setAdapter(adapter);

    wifiManager.startScan(); //make sure this is the last call
}

変更BroadcastReceiver:

class WifiScanReceiver extends BroadcastReceiver {
        @SuppressLint("UseValueOf")
        public void onReceive(Context c, Intent intent) {
            List<ScanResult> wifiScanList = wifiManager.getScanResults();
            //wifis = new String[wifiScanList.size()]; //remove this
            wifis.clear(); //add this
            for (int i = 0; i < wifiScanList.size(); i++) {
                String ssid = wifiScanList.get(i).SSID; //Get the SSID
                String bssid =  wifiScanList.get(i).BSSID //Get the BSSID
                //use add here:
                wifis.add( ssid + " " + bssid + " " +((wifiScanList.get(i)).toString()) ); //append to the other data
            }

            adapter.notifyDataSetChanged(); //add this
            wifiManager.startScan(); //start a new scan to update values faster

            //ArrayAdapter adapter = new ArrayAdapter<String>(getApplicationContext(),
             //       android.R.layout.simple_list_item_1, wifis)
            //list.setAdapter(adapter);
        }
    }

これは、スキャン結果ごとにのみ更新されます。ListView毎秒更新することはお勧めしません。RSSI レベルを表示する方法を再考することをお勧めします。SSID ごとにクリックしてTextView、現在の SSID の RSSI を毎秒更新する詳細ビューを表示できます。

于 2015-04-20T08:13:26.243 に答える