android wifi操作(掃描和連接)

jopen 8年前發布 | 75K 次閱讀 Android開發移動開發

android系列wifi操作，首先應該添加如下權限：

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

首先寫一個wifisevice,操作wifi

package com.example.androidwifi;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.IntentService;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class WifiService extends IntentService {

    private static final String DEBUG = "debug";
    private static List<ScanResult>resultList = new ArrayList<ScanResult>();
    private List<WifiConfiguration>wificonfigList = new ArrayList<WifiConfiguration>();
    private NetworkInfo mnetWorkInfo;
    private WifiInfo mWifiInfo;
    private WifiManager mwifiManager;//管理wifi

    public  List<Map<String,String>>mlist = new ArrayList<Map<String,String>>();

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        //獲得系統wifi服務
        mwifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
        registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        int status = intent.getExtras().getInt("status");
        switch (status) {
        case 0://open wifi && search wifi
            Log.d(DEBUG, "打開service wifi");
            if (!mwifiManager.isWifiEnabled()) {
                mwifiManager.setWifiEnabled(true);
                resultList.clear();
                mwifiManager.startScan();//開始搜索，當搜索到可用的wifi時，將發送WifiManager.SCAN_RESULTS_AVAILABLE_ACTION的廣播

                while (mlist.size() == 0) {//此處休眠0.1秒是因為搜索wifi是一個耗時的操作，如果不休眠，則掃描結果可能為空
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                Intent broadCastIntent = new Intent();
//              Bundle bundle = new Bundle();
                broadCastIntent.putExtra("result",(Serializable) mlist);

                broadCastIntent.setAction("com.androidwifi.opensuccess");
                sendBroadcast(broadCastIntent);

            }
            break;
        case 1://close wifi
            Log.d(DEBUG, "關閉service wifi");
            if (mwifiManager.isWifiEnabled()) {
                mwifiManager.setWifiEnabled(false);
            }
            break;
        case 2:
            int result = -1;//表示鏈接失敗
            Intent resultIntent = new Intent(); 
            resultIntent.setAction("com.androidwifi.result");

            String  ssid= intent.getStringExtra("ssid");
            String pass = intent.getStringExtra("pass");

            resultIntent.putExtra("ssid",ssid);
            int netWorkId = AddWifiConfig(resultList, ssid, pass);//添加該網絡的配置
            if (netWorkId !=-1) {
                getConfigurations();
                boolean isConnect = ConnectWifi(netWorkId);
                if (isConnect) {
                    result = 1;
                }
            }
            resultIntent.putExtra("result",result);
            sendBroadcast(resultIntent);
            break;

        default:
            break;
        }

    }

    /**
     * 當搜索到可用wifi時，將結果封裝到mlist中
     */
    private final BroadcastReceiver wifiReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context arg0, Intent intent) {
            // TODO Auto-generated method stub
            if (intent.getAction().equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {
                resultList = mwifiManager.getScanResults();
                sortByLevel(resultList);
                for (ScanResult scanResult : resultList) {
                    Map<String,String>map = new HashMap<String, String>();
                    map.put("wifi_name",scanResult.SSID);
                    map.put("wifi_bssid",scanResult.BSSID);
                    mlist.add(map);
                }
            }

        }
    };

    /**
     * 得到配置信息
     */
    public void getConfigurations() {
        wificonfigList = mwifiManager.getConfiguredNetworks();
    }

    /**
     * 該鏈接是否已經配置過
     * @param SSID
     * @return
     */
    public int isConfigured(String SSID) {
        for (int i = 0; i < wificonfigList.size(); i++) {
            if (wificonfigList.get(i).SSID.equals(SSID)) {
                return wificonfigList.get(i).networkId;
            }
        }
        return -1;
    }
    /**
     * 鏈接到制定wifi
     * @param wifiId
     * @return
     */
    public boolean ConnectWifi(int wifiId){
        boolean isConnect = false;
        int id= 0;
        for(int i = 0; i < wificonfigList.size(); i++){
            WifiConfiguration wifi = wificonfigList.get(i);
            id = wifi.networkId;
            if(id == wifiId){
                while(!(mwifiManager.enableNetwork(wifiId, true))){
                    Log.i("ConnectWifi",String.valueOf(wificonfigList.get(wifiId).status));
                }

                if ( mwifiManager.enableNetwork(wifiId, true)) {
                    isConnect = true;
                }
            }
        }
        return isConnect;
    }

    /**
     * 添加wifi配置
     * @param wifiList
     * @param ssid
     * @param pwd
     * @return
     */
    public int AddWifiConfig(List<ScanResult> wifiList,String ssid,String pwd){
        int wifiId = -1;
        for(int i = 0;i < wifiList.size(); i++){
            ScanResult wifi = wifiList.get(i);
            if(wifi.SSID.equals(ssid)){
                Log.i("AddWifiConfig","equals");
                WifiConfiguration wifiCong = new WifiConfiguration();
                wifiCong.SSID = "\""+wifi.SSID+"\"";
                wifiCong.preSharedKey = "\""+pwd+"\"";
                wifiCong.hiddenSSID = false;
                wifiCong.status = WifiConfiguration.Status.ENABLED;
                wifiId = mwifiManager.addNetwork(wifiCong);
                if(wifiId != -1){
                    return wifiId;
                }
            }
        }
        return wifiId;
    }

    //將搜索到的wifi根據信號強度從強到弱進行排序
    private void sortByLevel(List<ScanResult> resultList) {
        for(int i=0;i<resultList.size();i++)
            for(int j=1;j<resultList.size();j++)
            {
                if(resultList.get(i).level<resultList.get(j).level)    //level屬性即為強度
                {
                    ScanResult temp = null;
                    temp = resultList.get(i);
                    resultList.set(i, resultList.get(j));
                    resultList.set(j, temp);
                }
            }
    }

    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub

        unregisterReceiver(wifiReceiver);
        super.onDestroy();
    }

    public WifiService() {
        super("");
        // TODO Auto-generated constructor stub
    }

}

mainactivity.java代碼如下：

package com.example.androidwifi;

import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class MainActivity extends Activity {

    private Button msearchBtn;
    private Button mopenBtn;
    private Button mcloseBtn;
    private static  ListView msearchList;
    private static ProgressDialog dialog;
    private static LinearLayout openView;
    static List<Map<String,String>>mlist;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        msearchList = (ListView) findViewById(R.id.resultlist);
        msearchList.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> adapter, View view, int position,
                    long arg3) {
                // TODO Auto-generated method stub
                WifiService service = new WifiService();

                Map<String,String>map = mlist.get(position);//得到對應的list中的map
                final String ssid = map.get("wifi_name");//得到點擊的熱點的ssid，即wifi名稱
                int wifiItemId = service.isConfigured("\""+ssid+"\"");//判斷是否已經存儲該熱點的信息,返回bssid
                if (service.ConnectWifi(wifiItemId)) {
                    view.setBackgroundResource(R.color.green);
                }else{//彈出對話框，輸入密碼

                    View inflater = LayoutInflater.from(MainActivity.this).inflate(R.layout.ensure_conn,null);
                    final AlertDialog alertDialog =new  AlertDialog.Builder(MainActivity.this).setTitle("請輸入密碼").setView(inflater).create();
                    alertDialog.show();
                    final EditText passEdit = (EditText) inflater.findViewById(R.id.pass);
                    Button connBtn = (Button) inflater.findViewById(R.id.conn);
                    connBtn.setOnClickListener(new OnClickListener() {

                        @Override
                        public void onClick(View arg0) {
                            // TODO Auto-generated method stub
                            String pass = passEdit.getText().toString();
                            if (null == pass || "".equals(pass)) {
                                Toast.makeText(MainActivity.this,"請輸入密碼",1000).show();
                                return;
                            }
                            Intent connectIntent = new Intent(MainActivity.this,WifiService.class);
                            Bundle bundle = new Bundle();
                            bundle.putInt("status",2);
                            connectIntent.putExtras(bundle);
                            connectIntent.putExtra("ssid",ssid);
                            connectIntent.putExtra("pass",pass);
                            startService(connectIntent);
                            alertDialog.dismiss();
                            dialog =ProgressDialog.show(MainActivity.this,"","正在鏈接"+ssid);

                        }
                    });
                }
            }
        });
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }



    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        @SuppressWarnings("unused")
        LayoutInflater inflater = LayoutInflater.from(this);
        switch (item.getItemId()) {
        case R.id.open_wifi://open wifi && search wifi
            Intent openWifiIntent = new Intent(MainActivity.this,WifiService.class);
            Bundle openBundle = new Bundle();
            openBundle.putInt("status",0);
            openWifiIntent.putExtras(openBundle);
            startService(openWifiIntent);

            dialog = ProgressDialog.show(this,"正在打開wifi","正在搜索wifi...");

            break;
        case R.id.close_wifi://close wifi

            Intent closeWifiIntent = new Intent(MainActivity.this,WifiService.class);
            Bundle closeBundle = new Bundle();
            closeBundle.putInt("status",1);
            closeWifiIntent.putExtras(closeBundle);
            startService(closeWifiIntent);
            break;
        default:
            break;
        }

        return super.onOptionsItemSelected(item);
    }

    public static class WifiReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals("com.androidwifi.opensuccess")) {
                @SuppressWarnings("unchecked")
                List<Map<String, String>>list = (List<Map<String, String>>) intent.getSerializableExtra("result");
                mlist = list;
                dialog.dismiss();
                //              ArrayAdapter<String>adapter = new ArrayAdapter<String>(context,android.R.layout.simple_list_item_1,scanResult);
                SimpleAdapter adapter = new SimpleAdapter(context, mlist, R.layout.searchlist_item,new String[]{"wifi_name","wifi_bssid"},new int[]{R.id.wifi_name,R.id.wifi_bssid});

                msearchList.setAdapter(adapter);

            }

        }

    }

    public static class WifiResultReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (dialog.isShowing()) {
                dialog.dismiss();
            }
            // TODO Auto-generated method stub
            if (intent.getAction().equals("com.androidwifi.result")) {
                int result = intent.getIntExtra("result",0);
                String ssid = intent.getStringExtra("ssid");
                if (result == -1) {
                    Toast.makeText(context,"鏈接"+ssid+"失敗",1000).show();
                }
                if (result == 1) {
                    Toast.makeText(context,"已鏈接到"+ssid,1000).show();
                }
            }
        }
    }

}

源碼連接 http://download.csdn.net/detail/mockingbirds/8108345

來自： http://blog.csdn.net//mockingbirds/article/details/40680389

本文由用戶 jopen 自行上傳分享，僅供網友學習交流。所有權歸原作者，若您的權利被侵害，請聯系管理員。

轉載本站原創文章，請注明出處，并保留原始鏈接、圖片水印。

本站是一個以用戶分享為主的開源技術平臺，歡迎各類分享！

本文地址：http://www.baiduhome.net/lib/view/open1453108583605.html

Android開發移動開發