Android中掃描wifi熱點

1、首先建立了布局模板XML檔案vifi.xml,代碼很簡單，如下： <?xml version="1.0" encoding="utf-8"?>

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

        android:orientation="vertical" android:layout_width="fill_parent"

        android:layout_height="fill_parent">

        

        <TextView android:id="@+id/wifi" 

        android:layout_width="fill_parent"

        android:layout_height="wrap_content" 

        android:text="@string/hello" />

</LinearLayout>

 

2、寫java代碼，建立個Activity，代碼如下： package com.eoeandroid.demo.testcode;

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;

public class WifiTester 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.vifi);

                setTitle("eoe教程: Wifi Test.  -by:IceskYsl");

                mainText = (TextView) findViewById(R.id.wifi);

                mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);

                receiverWifi = new WifiReceiver();

                registerReceiver(receiverWifi, new IntentFilter(

                                WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

                mainWifi.startScan();

                mainText.setText("\nStarting Scan...\n");

        }

        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();

        }

        class WifiReceiver extends BroadcastReceiver {

                public void onReceive(Context c, Intent intent) {

                        sb = new StringBuilder();

                        wifiList = mainWifi.getScanResults();

                        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);

                }

        }

}

 

3、申請相關許可權，代碼如下： <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission> 

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

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

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

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

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

 

轉載：http://www.eoeandroid.com/viewthread.php?tid=386