Scan wifi for connections or Get number of available wifi connections

Scan wifi for connections or Get number of available wifi connections

wificonnection.java

import java.util.List;
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.WifiManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

public class WifiConnections extends Activity {

TextView mainText;
WifiManager mainWifi;
WifiReceiver receiverWifi;
List<ScanResult> wifiList;
StringBuilder sb = new StringBuilder();

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_wifi_connections);
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(), "wifi is disabled..making it enabled",
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("Starting Scan...");
}

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("Starting Scan");
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 Number Of Wifi connections :"+wifiList.size()+"\n\n");

for(int i = 0; i < wifiList.size(); i++){

sb.append(new Integer(i+1).toString() + ". ");
sb.append((wifiList.get(i)).toString());
sb.append("\n\n");
}

mainText.setText(sb);
}

}
}

activity_wifi_connections.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".WifiConnections" >

<TextView
android:id="@+id/mainText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@string/hello_world" />

</RelativeLayout>

 AndroidManifest.xml

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

I Am Not The Owner Of These Code .I Merely Have Copied Them From Various Sources. The Only Thing I Did Is That I Am Going To Present Them In More Easy Way To Understand.