这部分代码显示了可能的 wifi 连接。问题是它都在一个独特的文本视图中。是否可以从此代码创建 wifi 连接的列表视图？
package com.pkg.androidmemoryinfo;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.MemoryInfo;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Typeface;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
import java.util.Calendar;
import java.util.List;
public class MainActivity extends Activity implements OnClickListener {
private String ips = null;
private WifiManager wifi;
private WifiInfo info;
private TextView ipv;
private TextView text;
TextView mainText;
WifiManager mainWifi;
WifiReceiver receiverWifi;
List<ScanResult> wifiList;
StringBuilder sb = new StringBuilder();
static final int TIME_DIALOG_ID = 1111;
private TextView output;
public Button btnClick;
private int hour;
private int minute;
private ListView lv;
public ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Nav Drawer //
// fine //
mainText = (TextView) findViewById(R.id.mainText);
// Initiate wifi service manager
mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
// Check for wifi is disabled
if (mainWifi.isWifiEnabled() == false)
{
// If wifi disabled then enable it
Toast.makeText(getApplicationContext(), "Il Wifi è disattivato.. Accensione in corso.",
Toast.LENGTH_LONG).show();
mainWifi.setWifiEnabled(true);
}
// wifi scaned value broadcast receiver
receiverWifi = new WifiReceiver();
// Register broadcast receiver
// Broacast receiver will automatically call when number of wifi connections changed
registerReceiver(receiverWifi, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
mainWifi.startScan();
mainText.setText("Ricerca reti Wi-Fi in corso...");
/// Wifi Info ///
wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE); // istanzio l'oggetto wifi(classe WifiManager)
info = wifi.getConnectionInfo(); // istanzio l'oggetto info(classe WifiInfo)
if (info.getBSSID() != null) { // verifico che la connessione si attiva, in particolare il metodo getBSSID() restituisce valore nullo se la connessione non è attiva
this.ipv = (TextView)this.findViewById(R.id.addres);
this.text = (TextView)this.findViewById(R.id.text);
this.text.setText("Dispositivo connesso a " + info.getSSID()); //qui viene richiamato il metodo getSSID() che restituisce una stringa, in particolare l'identificativo dell'SSID
//int ip = info.getIpAddress(); // il metodo getIpAddress() restituisce un intero che rappresenta l'indirizzo IP, ovviamente non è la tipica rappresentazione a cui siamo abituati ex.: 127.0.0.1
//this.ips = ((( ip & 0xFF )) + "." + (( ip >> 8 ) & 0xFF ) + "." + (( ip >> 16 ) & 0xFF ) + "." + (( ip >> 24 ) & 0xFF ));// converto l'intero nella tipica notazione, ho adottato questo sistema un po grezzo poiche non conosco un altro metodo piu semplice
this.ipv.setText(ips);
} else {// se la connessione non è attiva
this.ipv = (TextView)this.findViewById(R.id.addres);
this.ipv.setText("Nessuna connessione Wifi attiva!");
}
//// FINE /////
output = (TextView) findViewById(R.id.output);
/********* display current time on screen Start ********/
final Calendar c = Calendar.getInstance();
// Current Hour
hour = c.get(Calendar.HOUR_OF_DAY);
// Current Minute
minute = c.get(Calendar.MINUTE);
// Append in a StringBuilder
StringBuilder outputMsg = new StringBuilder().append(utilTime(hour)).append(":")
.append(utilTime(minute));
// set current time into output textview
output.setText(outputMsg);
/********* display current time on screen End ********/
// Add Button Click Listener
addButtonClickListener();
}
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0, 0, 0, "Refresh");
return super.onCreateOptionsMenu(menu);
}
public boolean onMenuItemSelected(int featureId, MenuItem item) {
mainWifi.startScan();
mainText.setText("Inizio Ricerca");
return super.onMenuItemSelected(featureId, item);
}
protected void onPause() {
unregisterReceiver(receiverWifi);
super.onPause();
}
protected void onResume() {
registerReceiver(receiverWifi, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
super.onResume();
}
// Broadcast receiver class called its receive method
// when number of wifi connections changed
class WifiReceiver extends BroadcastReceiver {
// This method call when number of wifi connections changed
public void onReceive(Context c, Intent intent) {
sb = new StringBuilder();
wifiList = mainWifi.getScanResults();
sb.append("\n Connessioni trovate :"+wifiList.size()+"\n\n");
adapter = new ArrayAdapter<String>(getAppContext(),R.layout.activity_main); //xml file see below...
for(int i = 0; i < wifiList.size(); i++){
adapter.add(" "+new Integer(i+1).toString() + ". "+ (wifiList.get(i)).toString());
}
lv.setAdapter(adapter);
mainText.setText(sb);
}
private Context getAppContext() {
// TODO Auto-generated method stub
return null;
}
}
////// DIALOG TIMEPICKER ////////
public void addButtonClickListener() {
btnClick = (Button) findViewById(R.id.btnClick);
btnClick.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
showDialog(TIME_DIALOG_ID);
}
});
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case TIME_DIALOG_ID:
// set time picker as current time
return new TimePickerDialog(this, timePickerListener, hour, minute,
false);
}
return null;
}
private TimePickerDialog.OnTimeSetListener timePickerListener = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minutes) {
// TODO Auto-generated method stub
hour = hourOfDay;
minute = minutes;
// set current time into output textview
output.setText(new StringBuilder().append(utilTime(hour))
.append(":").append(utilTime(minute)));
}
};
private static String utilTime(int value) {
if (value < 10)
return "0" + String.valueOf(value);
else
return String.valueOf(value);
}
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
}
}
或者任何人都有带有 wifi 连接的列表视图？