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在Android中扫描wifi热点演示实例教程
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早上发了一段扫描wifi热点的代码,有同学反馈说编译不通过,晚上有点时间,重新试了一下,发现没啥问题,想汇总下测试过程,给需要的人参考。

1、首先新建了布局模板XML文件vifi.xml,代码很简单,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、写java代码,新建个Activity,代码如下:

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、申请相关权限,代码如下:

<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>

4、OK,就这些,效果看附件图片,我扫描到我这有2个热点。

 

 


原文链接:http://www.cnblogs.com/vus520/archive/2011/11/12/2561950.html
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长平狐
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