小程序源码 网络浏览 WIFI扫描Demo.rar

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; } }