android - 通过 Android 应用程序连接到 WiFi

Question

我想创建一个应用程序，检测附近可用的 wifi 连接，然后连接到它们。到目前为止我所做的是，我创建了一个列出可用 wifi 连接的 ListView，然后我创建了一个 LongItemClick 对话框，显示网络的 SSID 和 BSSID，并要求输入密码。现在，我希望连接到其中一个网络，而不管它是哪种网络，它可能是 WEP、WPA 或 Open。我无法大致了解如何连接到它们。谁能帮我这个 ？我搜索了所有可用的答案，但没有找到任何答案可以帮助我做到这一点!

我用下面的方法尝试上面的事情。我创建了附近所有可用 Wi-Fi 网络的 ListView ，然后尝试在长按时显示连接信息，并提供通过点击连接到点击的 Wi-Fi 网络的选项。

代码:

package com.example.random;



import java.util.ArrayList;
import java.util.HashMap;    
import java.util.Iterator;
import java.util.List;    

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.FragmentManager;
import android.app.ListActivity;
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.WifiConfiguration;   
import android.net.wifi.WifiConfiguration.AuthAlgorithm;
import android.net.wifi.WifiConfiguration.GroupCipher;
import android.net.wifi.WifiConfiguration.KeyMgmt;
import android.net.wifi.WifiConfiguration.PairwiseCipher;
import android.net.wifi.WifiConfiguration.Protocol;
import android.net.wifi.WifiManager;    
import android.os.Bundle;    
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.util.Log;   
import android.view.LayoutInflater;
import android.view.View;    
import android.view.View.OnClickListener;    
import android.view.ViewGroup;
import android.widget.AdapterView;    
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;    
import android.widget.EditText;
import android.widget.ListView;    
import android.widget.SimpleAdapter;    
import android.widget.TextView;    
import android.widget.Toast;

public class MainActivity extends FragmentActivity implements OnClickListener
 {      
    WifiManager wifi;       
    ListView lv;
//    TextView textStatus;
    Button buttonScan;
    int size = 0;
    List<ScanResult> results;
    final Context context = this;
    EditText pass;
    String checkPassword = null;

    String ITEM_KEY = "key";
    ArrayList<HashMap<String, String>> arraylist = new ArrayList<HashMap<String, String>>();
    SimpleAdapter adapter;

    /* Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

//        textStatus = (TextView) findViewById(R.id.textStatus);
        buttonScan = (Button) findViewById(R.id.buttonScan);
        buttonScan.setOnClickListener(this);
        lv = (ListView)findViewById(R.id.list);
        lv.setOnItemClickListener(new OnItemClickListener(){

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                    long arg3) {
                // TODO Auto-generated method stub
                connectToWifi(arg2);
            }



                private void connectToWifi(final int position)
                        {
                    final Dialog dialog = new Dialog(context);
                    dialog.setContentView(R.layout.connect);
                    dialog.setTitle("Connect to Network");
                    TextView textSSID = (TextView) dialog.findViewById(R.id.textSSID);
                    TextView textBSSID = (TextView) dialog.findViewById(R.id.textBSSID);
                    TextView capabilities = (TextView) dialog.findViewById(R.id.textCapabilities);

                    Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
                    pass = (EditText) dialog.findViewById(R.id.textPassword);
                    textSSID.setText(results.get(position).SSID);
                    textBSSID.setText(results.get(position).BSSID);
                    capabilities.setText(results.get(position).capabilities);
//                                      
                    // if button is clicked, connect to the network;
                    dialogButton.setOnClickListener(new OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            checkPassword = pass.getText().toString();
                            finallyConnect(checkPassword);
                            dialog.dismiss();
                        }

                        private void finallyConnect(String checkPassword) {
                            String networkSSID = results.get(position).SSID;
                            String networkPass = checkPassword;

                            WifiConfiguration wifiConfig = new WifiConfiguration();
                            wifiConfig.SSID = String.format("\"%s\"", networkSSID);
                            wifiConfig.preSharedKey = String.format("\"%s\"", networkPass);

                            WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
                            //remember id
                            int netId = wifiManager.addNetwork(wifiConfig);
                            wifiManager.disconnect();
                            wifiManager.enableNetwork(netId, true);
                            wifiManager.reconnect();



                            WifiConfiguration conf = new WifiConfiguration();
                            conf.SSID = "\"\"" + networkSSID + "\"\"";
                            conf.preSharedKey = "\""+ networkPass +"\"";
                            WifiManager wifiManager1 = (WifiManager)context.getSystemService(Context.WIFI_SERVICE); 
                            wifiManager1.addNetwork(conf);

//                          List<WifiConfiguration> list = wifiManager1.getConfiguredNetworks();
//                          for( WifiConfiguration i : list ) {
//                              if(i.SSID != null && i.SSID.equals("\"" + networkSSID + "\"")) {
//                                   wifiManager1.disconnect();
//                                   
//                                  wifiManager1.enableNetwork(i.networkId, true);
//                                  if(wifiManager1.reconnect()){
////                                    int ipAddress = wifiManager.getConnectionInfo().getIpAddress();
////                                    Toast.makeText(getApplicationContext(), ipAddress, Toast.LENGTH_SHORT).show();
//                                  Toast.makeText(getApplicationContext(), networkSSID + " "+ "Connection successful", Toast.LENGTH_SHORT).show();                              
//                                  }
//                                  else{
//                                  Toast.makeText(getApplicationContext(), "Connection Failed", Toast.LENGTH_SHORT).show();
//                                  }
//                                  
//                                   break;
//                                         
//                              }
//                          }

                        }
                    });
                    dialog.show();
                }
       });

        lv.setOnItemLongClickListener(new OnItemLongClickListener(){

            @Override
            public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                // TODO Auto-generated method stub
                showWifiSettings(arg2);
                return true;
            }

            private void showWifiSettings(int arg2) {
                showDialogOfOptions(arg2);
                    }

            private void showDialogOfOptions(int arg2) {
                // Create a custom Dialog
                final Dialog dialog = new Dialog(context);
                dialog.setContentView(R.layout.custom);
                dialog.setTitle("Network details");
                TextView textSSID = (TextView) dialog.findViewById(R.id.textSSID);
                TextView textBSSID = (TextView) dialog.findViewById(R.id.textBSSID);
                Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
                textSSID.setText(results.get(arg2).SSID);
                textBSSID.setText(results.get(arg2).BSSID);
                // if button is clicked, close the custom dialog
                dialogButton.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        dialog.dismiss();
                    }
                });

                dialog.show();
              }
            });

        wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
        if (wifi.isWifiEnabled() == false)
        {
            Toast.makeText(getApplicationContext(), "wifi is disabled..making it enabled", Toast.LENGTH_LONG).show();
            wifi.setWifiEnabled(true);
        }   

        this.adapter = new SimpleAdapter(MainActivity.this, arraylist, R.layout.row, new String[] { ITEM_KEY }, new int[] { R.id.list_value });
        lv.setAdapter(this.adapter);

        registerReceiver(new BroadcastReceiver()
        {
            @Override
            public void onReceive(Context c, Intent intent) 
            {
               results = wifi.getScanResults();
               size = results.size();
            }
        }, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));                    
    }

//    protected void connectionStatus(String password) {
//      // TODO Auto-generated method stub
//      
//      
//  }

    public void onClick(View view) 
    {


        arraylist.clear();          
        wifi.startScan();

        Toast.makeText(this, "Scanning...." + size, Toast.LENGTH_SHORT).show();
        try 
        {
            size = size - 1;
            while (size >= 0) 
            {   
                HashMap<String, String> item = new HashMap<String, String>();
                item.put(ITEM_KEY, results.get(size).SSID.toString()+ results.get(size).capabilities.toString());

                arraylist.add(item);
                size--;
                adapter.notifyDataSetChanged();                 
            }


           }
        catch (Exception e)
        { }         
    }    
}

应用程序运行良好，但未连接到任何 Wifi 网络。有什么帮助吗？

Answer 1

您需要一个 ScanResult 来确定用户选择的 wifi 配置的加密类型。

下面的代码在我的应用程序中运行良好，除了 EAP 加密类型尚未处理。

还有一件事，方法 mWifiManager.reassociate( ) 和 mWifiManager.reconnect( ) 对我来说似乎是一样的。

 private void connectWifi( ScanResult sr , String pwd )
    {

    WifiConfiguration config = new WifiConfiguration( );
    config.allowedAuthAlgorithms.clear( );
    config.allowedGroupCiphers.clear( );
    config.allowedKeyManagement.clear( );
    config.allowedPairwiseCiphers.clear( );
    config.allowedProtocols.clear( );
    config.SSID = "\"" + sr.SSID + "\"";

    if( sr.capabilities.contains( "WEP" ) )
    {
        config.hiddenSSID = true;

        if( pwd.matches( "[0-9A-Fa-f]{64}" ) )
        {
        config.preSharedKey = pwd;
        }
        else
        {
        config.preSharedKey = '"' + pwd + '"';
        }

        config.allowedKeyManagement.set( KeyMgmt.NONE );
        config.allowedAuthAlgorithms.set( WifiConfiguration.AuthAlgorithm.OPEN );
        config.allowedAuthAlgorithms.set( WifiConfiguration.AuthAlgorithm.SHARED );
        config.allowedGroupCiphers.set( WifiConfiguration.GroupCipher.CCMP );
        config.allowedGroupCiphers.set( WifiConfiguration.GroupCipher.TKIP );
        config.allowedGroupCiphers.set( WifiConfiguration.GroupCipher.WEP40 );
        config.allowedGroupCiphers.set( WifiConfiguration.GroupCipher.WEP104 );
        config.wepTxKeyIndex = 0;

    }
    else if( sr.capabilities.contains( "PSK" ) )
    {
        config.preSharedKey = "\"" + pwd + "\"";
        config.hiddenSSID = true;
        config.allowedAuthAlgorithms.set( WifiConfiguration.AuthAlgorithm.OPEN );
        config.allowedGroupCiphers.set( WifiConfiguration.GroupCipher.TKIP );
        config.allowedKeyManagement.set( WifiConfiguration.KeyMgmt.WPA_PSK );
        config.allowedPairwiseCiphers.set( WifiConfiguration.PairwiseCipher.TKIP );
        config.allowedGroupCiphers.set( WifiConfiguration.GroupCipher.CCMP );
        config.allowedPairwiseCiphers.set( WifiConfiguration.PairwiseCipher.CCMP );
        config.status = WifiConfiguration.Status.ENABLED;
    }
    else if( sr.capabilities.contains( "EAP" ) )
    {

    }
    else
    {
        config.allowedKeyManagement.set( KeyMgmt.NONE );
    }

    int wcgID = mWifiManager.addNetwork( config );
    mWifiManager.enableNetwork( wcgID , true );
    //  mWifiManager.reconnect( );
    mWifiManager.reassociate( );
    mWifiManager.saveConfiguration( );
    }






private final OnItemClickListener mOnItemClickListener = new OnItemClickListener( )
    {

    @Override
    public void onItemClick( AdapterView< ? > parent , View view , int position , long id )
    {
        final ScanResult sr = sortWifiList.get( position );
        if( !mWifiInfo.getSSID( ).equals( "\"" + sr.SSID + "\"" ) )
        {
        mConnectState = NO_CONNECT;
        refreshConnectViews( );
        }
        connectImage = (ImageView)view.findViewById( R.id.wifi_connected );
        connectTextView = (TextView)view.findViewById( R.id.wifi_info_state );
        connectTextView.setTag( sr );
        //      connectTextView.setVisibility( View.VISIBLE );
        //      connectImage.setVisibility( View.VISIBLE );
        //      connectTextView.setText( R.string.wifi_connecting );
        //      connectImage.setBackground( refreshDrawable );
        //      connectImage.startAnimation( animation );
        //      TextView wifiSsid = (TextView)view.findViewById( R.id.wifi_ssid );
        //      wifiSsid.setPadding( 0 , 0 , 0 , 0 );
        if( !mWifiInfo.getSSID( ).equals( "\"" + sr.SSID + "\"" ) )
        {
        if( hasLocked( sr.capabilities ) )
        {
            mWifiConfiguration = mWifiManager.getConfiguredNetworks( );
            WifiConfiguration wc = hasSaved( sr );
            // saved wifi , connect directly
            if( wc != null )
            {
            connectWifi( wc );
            }
            else
            {
            enterPasswordDialog( view , sr );
            }
        }
        else
        {
            connectWifi( sr , "" );
        }
        }
        autoRefresh = false;
        mScanner.pause( );
    }
    };


    private boolean hasLocked( String capabilities )
    {
    if( capabilities.contains( "WEP" ) )
    {
        return true;
    }
    else if( capabilities.contains( "PSK" ) )
    {
        return true;
    }
    else if( capabilities.contains( "EAP" ) )
    {
        return true;
    }
    return false;
    }

private void connectWifi( WifiConfiguration wc )
{
    int wcgID = mWifiManager.addNetwork( wc );
    mWifiManager.enableNetwork( wcgID , true );
    //  mWifiManager.reconnect( );
    mWifiManager.reassociate( );
}