Создать приложение, которое показывает WiFi доступные соединения

Question

Я пытаюсь создать приложение, которое будет показывать подключение Wifi

package com.example.amit.ak503; 
import java.util.List; 
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.Handler; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Switch; 
import android.widget.Toast; 

import java.lang.reflect.Array; 

import java.util.ArrayList; 

import java.util.List; 


public class MainActivity extends AppCompatActivity { 
static int LENGTH_SHORT=600; 

Switch s1; 
WifiManager obj1; 
WifiReceiver obj2;//obj of parent broadcastReceiver class 
StringBuilder sb=new StringBuilder(); 
private final Handler handler=new Handler(); 
@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    obj1=(WifiManager)getSystemService(Context.WIFI_SERVICE); 
    s1=(Switch)findViewById(R.id.switch1); 
    s1.setChecked(true); 
    obj2=new WifiReceiver(); 
    registerReceiver(obj2,new 
IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); 
    s1.setOnClickListener(new 
           View.OnClickListener() { 
            @Override 
            public void onClick(View v) { 

             if(s1.isChecked()) 
             { 
              obj1.setWifiEnabled(true); 

Toast.makeText(MainActivity.this,"Wifi enabled",Toast.LENGTH_SHORT).show(); 
             } 
             else 
             { 
              obj1.setWifiEnabled(false); 

Toast.makeText(MainActivity.this,"Wifi Disabled",Toast.LENGTH_SHORT).show(); 
             } 
             doInback(); 
            } 
           }); 

} 
public void doInback() 
{ 
    handler.postDelayed(new Runnable() { 
     @Override 
     public void run() { 
      obj1=(WifiManager)getSystemService(Context.WIFI_SERVICE); 
      obj2=new WifiReceiver(); 
      registerReceiver(obj2,new 
IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); 
      obj1.startScan(); 
      doInback(); 
     } 
    },1000); 
} 
public boolean onCreateOptionsMenu(Menu menu) 
{ 
    menu.add(0,0,0,"Refresh"); 
    return super.onCreateOptionsMenu(menu); 
} 
public boolean onOptionsItemSelected(MenuItem item) 
{//replaced onMenuItemSelected(featuredid,MenuItem item) with 
onOptionsItemSelected(MenuItem item) 
    obj1.startScan(); 

Toast.makeText(MainActivity.this,"Refreshing",Toast.LENGTH_SHORT).show(); 
    return super.onOptionsItemSelected(item); 
} 
@Override 
protected void onPause() 
{ 
    unregisterReceiver(obj2); 
    super.onPause(); 
    Toast.makeText(MainActivity.this,"Unregistering 
Receiver",Toast.LENGTH_SHORT).show(); 
} 
@Override 
protected void onResume() 
{ 
    registerReceiver(obj2,new 
IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); 
    super.onResume(); 
    Toast.makeText(MainActivity.this,"Registering 
Receiver",Toast.LENGTH_SHORT).show(); 
} 
class WifiReceiver extends BroadcastReceiver 
{ 
    public void onReceive(Context c,Intent intent) 
    { 
     //Toast.makeText(MainActivity.this,"onReceive 
Started",Toast.LENGTH_SHORT).show(); 
     ArrayList<String> connections=new ArrayList<String>(); 
     ArrayList<Float> Signal_strength=new ArrayList<Float>(); 

sb=new StringBuilder(); 
     List<ScanResult> wifiList; 
     wifiList=obj1.getScanResults(); 
     for(int i=0;i<wifiList.size();i++) 
     { 
      connections.add(wifiList.get(i).SSID); 
     } 


    } 

    } 

код Xml является как-:

<?xml version="1.0" encoding="utf-8"?> 
<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" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context="com.example.amit.ak503.MainActivity"> 

<Switch 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="New Switch" 
    android:id="@+id/switch1" 
    android:layout_alignParentStart="true" /> 

</RelativeLayout> 



} 

проблема с этим что это не доступные wificonnections. Кнопка работает правильно.

Answer 1

Просто проверьте подключение к сети.