如何将Android Wifi扫描结果放入列表？

试试这个代码

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;        @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) getApplicationContext().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)        { }  }    }

WiFiDemo.xml：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:layout_margin="16dp"    android:orientation="vertical">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center_vertical"        android:orientation="horizontal">        <TextView android:id="@+id/textStatus" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="Status" />        <Button android:id="@+id/buttonScan" android:layout_width="wrap_content" android:layout_height="40dp" android:text="Scan" />    </LinearLayout>    <ListView        android:id="@+id/list"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_marginTop="20dp"></ListView></LinearLayout>

对于

ListView- row.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical"    android:padding="8dp">    <TextView        android:id="@+id/list_value"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textSize="14dp" /></LinearLayout>

在

AndroidManifest.xml

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