I am developing an android app where i need to scan the available Wi-Fi network and connect with a specific Wi-fi.I have written the code for it. But I dont get the list of network. It would be very helpful if anyone can help me out with it.
package com.example.wifilist;
import android.Manifest;
import android.annotation.SuppressLint;import android.app.Dialog;import android.app.ListActivity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
public class MainActivity extends ListActivity {
WifiManager mainWifiObj;
WifiScanReceiver wifiReciever;
ListView list;
String wifis[];
EditText pass;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list=getListView();
mainWifiObj (WifiManager)getApplicationContext().getSystemService(Context.WIFI_SERVICE);
wifiReciever = new WifiScanReceiver();
mainWifiObj.startScan();
// listening to single list item on click
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// selected item
String ssid = ((TextView) view).getText().toString();
connectToWifi(ssid);
Toast.makeText(MainActivity.this,"Wifi SSID : "+ssid,Toast.LENGTH_SHORT).show();
}
});
}
protected void onPause() {
unregisterReceiver(wifiReciever);
super.onPause();
}
protected void onResume() {
registerReceiver(wifiReciever,new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
super.onResume();
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
if(checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED)
{
requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},87);
}
}
}
class WifiScanReceiver extends BroadcastReceiver {
@SuppressLint("UseValueOf")
public void onReceive(Context c, Intent intent) {
if(intent.getAction().equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {
List<ScanResult> wifiScanList = mainWifiObj.getScanResults();
wifis = new String[wifiScanList.size()];
for (int i = 0; i < wifiScanList.size(); i++) {
wifis[i] = ((wifiScanList.get(i)).toString());
}
String filtered[] = new String[wifiScanList.size()];
int counter = 0;
for (String eachWifi : wifis) {
String[] temp = eachWifi.split(",");
filtered[counter] = temp[0].substring(5).trim();//+"\n" + temp[2].substring(12).trim()+"\n" +temp[3].substring(6).trim();//0->SSID, 2->Key Management 3-> Strength
counter++;
}
list.setAdapter(new ArrayAdapter<String>(getApplicationContext() ,R.layout.list_item, R.id.label, filtered));
}
}
}
private void finallyConnect(String networkPass, String networkSSID) {
WifiConfiguration wifiConfig = new WifiConfiguration();
wifiConfig.SSID = String.format("\"%s\"", networkSSID);
wifiConfig.preSharedKey = String.format("\"%s\"", networkPass);
// remember id
int netId = mainWifiObj.addNetwork(wifiConfig);
mainWifiObj.disconnect();
mainWifiObj.enableNetwork(netId, true);
mainWifiObj.reconnect();
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"\"" + networkSSID + "\"\"";
conf.preSharedKey = "\"" + networkPass + "\"";
mainWifiObj.addNetwork(conf);
}
private void connectToWifi(final String wifiSSID) {
final Dialog dialog = new Dialog(this);
dialog.setContentView(R.layout.connect);
dialog.setTitle("Connect to Network");
TextView textSSID = (TextView) dialog.findViewById(R.id.textSSID1);
Button dialogButton = (Button) dialog.findViewById(R.id.okButton);
pass = (EditText) dialog.findViewById(R.id.textPassword);
textSSID.setText(wifiSSID);
// if button is clicked, connect to the network;
dialogButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String checkPassword = pass.getText().toString();
finallyConnect(checkPassword, wifiSSID);
dialog.dismiss();
}
});
dialog.show();
}
}
