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WifiBroadCastReceiver.java
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WifiBroadCastReceiver.java
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package com.example.wificonnectionlistener;
import java.util.List;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Handler;
import android.util.Log;
import android.widget.Toast;
public class WifiBroadCastReceiver extends BroadcastReceiver {
private WifiManager mWifiManager;
private Handler mHandler = new Handler();
private String message;
@Override
public void onReceive(final Context context, final Intent intent) {
new Thread(new Runnable() {
public void run() {
// wait for a second.
try {
Thread.sleep(1000);
}
catch (InterruptedException e) {
e.printStackTrace();
}
if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
ConnectivityManager manager = (ConnectivityManager) context.getSystemService (Context.CONNECTIVITY_SERVICE);
if(manager != null){
if(isNetworkAvailable(manager)){
NetworkInfo info = manager.getActiveNetworkInfo();
String typeName = info.getTypeName();
message = "Network Type is "+typeName;
UtterText(context, message);
mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
int state = mWifiManager.getWifiState();
switch (state) {
case WifiManager.WIFI_STATE_DISABLED:
message = "Wifi connection lost.";
UtterText(context, message);
break;
case WifiManager.WIFI_STATE_ENABLED:
if(typeName.equalsIgnoreCase("WIFI")){
getAvailableWifiScanResults(context);
getConnectedNetWorkInformation(context);
}
break;
case WifiManager.WIFI_STATE_DISABLING:
message = "Wifi Disabling...";
UtterText(context, message);
break;
case WifiManager.WIFI_STATE_ENABLING:
message = "Wifi Enabling...";
UtterText(context, message);
break;
case WifiManager.WIFI_STATE_UNKNOWN:
message = "Wifi state unknown.";
UtterText(context, message);
break;
}
}
else{
message = "Data Connection Lost.";
UtterText(context, message);
}
}
}
}
}).start();
}
/***
* Checks Data Connection.
*
* @param manager
* @return true if there is data connection else returns false.
*/
private boolean isNetworkAvailable(ConnectivityManager manager) {
NetworkInfo info = manager.getActiveNetworkInfo();
if(info != null){
return info.isConnectedOrConnecting();
}
return false;
}
/***
*
*Scans List of Available Wifi Networks
*
**/
private void getAvailableWifiScanResults(Context mContext) {
List<ScanResult> mScanResults = mWifiManager.getScanResults();
ScanResult bestResult = null;
if(mScanResults != null){
for(ScanResult results : mScanResults){
Log.d("Available Networks", results.SSID);
if(bestResult == null || WifiManager.compareSignalLevel(bestResult.level, results.level) < 0){
bestResult = results;
}
}
if(mScanResults.size() > 0 && bestResult != null){
String message = String.format("%s networks found. %s is the strongest.", mScanResults.size(), bestResult.SSID);
UtterText(mContext, message);
}
}
}
/***
*
*gets the currently connected Wifi Networks Information.
*
**/
private void getConnectedNetWorkInformation(Context mContext) {
WifiInfo mWifiInfo = mWifiManager.getConnectionInfo();
String message;
if(mWifiInfo != null){
String ssid = mWifiInfo.getSSID();
int wifiSignalStrength = WifiManager.calculateSignalLevel(mWifiInfo.getRssi(), 4);
int link_speed = mWifiInfo.getLinkSpeed();
message = String.format("connected to %s with signal strength %s and link speed of %s", ssid, wifiSignalStrength, link_speed);
}
else{
message = "Not Conntected to Any Wifi Network";
}
UtterText(mContext, message);
}
/***
*
*sends the text to TextToSpeech Service
*
**/
private void UtterText(Context mContext, String message) {
mHandler.post(new MyRunnable(message, mContext));
Intent tts_intent = new Intent(mContext, TextToSpeechService.class);
tts_intent.putExtra("message", message);
mContext.startService(tts_intent);
}
class MyRunnable implements Runnable
{
String data;
Context mContext;
public MyRunnable(String data, Context mContext) {
this.data = data;
this.mContext = mContext;
}
public void run() {
Toast.makeText(mContext, data, Toast.LENGTH_LONG).show();
}
}
}