package src.hero.com;
import java.util.List;
import android.app.Activity;
import android.app.ProgressDialog;
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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
/*
*信号强度是负数 wifiinfo.getRssi()这个方法决定的
*得到的值是一个0到-100的区间值，是一个int型数据，其中0到-50表示信号最好，
*-50到-70表示信号偏差，小于-70表示最差，有可能连接不上或者掉线。
*/
public class WifiTester extends Activity
{
private Button btn_scan;
/** 定义WifiManager对象 */
private WifiManager mainWifi;
/** 扫描完毕接收器 */
private WifiReceiver receiverWifi;
/** 扫描出的网络连接列表 */
private List<ScanResult> wifiList;
private ProgressDialog dialog;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
((WifiTesterApp) getApplication()).setWifiTester(WifiTester.this);// 设定实例，供其他类调用
mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
receiverWifi = new WifiReceiver();
btn_scan = (Button) this.findViewById(R.id.button_scran);
btn_scan.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
scanWifi();
}
});
}
/**
* 扫描WIFI 加载进度条
*/
void scanWifi()
{
OpenWifi();
mainWifi.startScan();
dialog = ProgressDialog.show(WifiTester.this, "", "正在扫描WIFI热点,请稍候");
}
/**
* 打开WIFI
*/
public void OpenWifi()
{
if (!mainWifi.isWifiEnabled())
{
mainWifi.setWifiEnabled(true);
}
}
/**
* 关闭WIFI
*/
public void CloseWifi()
{
if (mainWifi.isWifiEnabled())
{
mainWifi.setWifiEnabled(false);
}
}
public boolean onCreateOptionsMenu(Menu menu)
{
menu.add(0, 0, 0, "重新扫描");
return super.onCreateOptionsMenu(menu);
}
public boolean onMenuItemSelected(int featureId, MenuItem item)
{
scanWifi();
return super.onMenuItemSelected(featureId, item);
}
protected void onPause()
{
super.onPause();
unregisterReceiver(receiverWifi);// 注销广播
}
protected void onResume()
{
super.onResume();
registerReceiver(receiverWifi, new IntentFilter(
WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));// 注册广播
}
class WifiReceiver extends BroadcastReceiver
{
public void onReceive(Context context, Intent intent)
{
if (intent.getAction().equals(
WifiManager.SCAN_RESULTS_AVAILABLE_ACTION))
{
wifiList = mainWifi.getScanResults();
dialog.dismiss();
Toast.makeText(context, "扫描完毕", Toast.LENGTH_LONG).show();
Intent in = new Intent();
in.setClass(WifiTester.this, ListOk.class);
WifiTester.this.startActivity(in);
}
}
}
public List<ScanResult> getWifiList()
{
return wifiList;
}
public void setWifiList(List<ScanResult> wifiList)
{
this.wifiList = wifiList;
}
public WifiManager getMainWifi()
{
return mainWifi;
}
public void setMainWifi(WifiManager mainWifi)
{
this.mainWifi = mainWifi;
}
}
Android WIFI扫描Demo.zip （46个子文件） 
Android WIFI扫描Demo Android WIFI扫描Demo 
.project 852B default.properties 360B bin WifiTester.apk 17KB src hero com R$string.class 409B R$layout.class 376B WifiTesterApp.class 599B R$drawable.class 382B R.class 489B WifiTester$WifiReceiver.class 2KB ListOk.class 4KB R$attr.class 322B WifiTester$1.class 759B WifiTester.class 4KB R$id.class 372B res drawable-ldpi 
icon.png 2KB drawable-hdpi icon.png 4KB drawable-mdpi icon.png 2KB resources.ap_ 11KB classes src hero com R$string.class 409B R$layout.class 376B WifiTesterApp.class 599B R$drawable.class 382B R.class 489B WifiTester$WifiReceiver.class 2KB ListOk.class 4KB R$attr.class 322B WifiTester$1.class 759B WifiTester.class 4KB R$id.class 372B 扫描附近wifi.apk 17KB resources.ap_ 11KB classes.dex 9KB classes.dex 9KB proguard.cfg 1KB AndroidManifest.xml 1KB src src hero com ListOk.java 3KB WifiTesterApp.java 318B WifiTester.java 3KB res values strings.xml 171B layout main.xml 442B drawable-ldpi icon.png 2KB drawable-hdpi icon.png 4KB drawable-mdpi icon.png 3KB .classpath 304B gen src hero com R.java 735B assets 1-120Q92103380-L.png 62KB资源评论
