【Android】Wifi治理与应用

package com.app.myweb;import java.util.List;import android.app.Activity;import android.content.Context;import android.net.wifi.ScanResult;import android.net.wifi.WifiManager;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class WifiTest extends Activity{	private WifiManager wifiManager ;	private Button button;	private TextView textView1,textView2;	@Override	protected void onCreate(Bundle savedInstanceState) {		// TODO Auto-generated method stub		super.onCreate(savedInstanceState);		setContentView(R.layout.wifi);		button = (Button) findViewById(R.id.button1);		textView1 = (TextView) findViewById(R.id.textView1);		textView2 = (TextView) findViewById(R.id.textView2);				wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);				if (wifiManager.isWifiEnabled()) {//判断Wifi是否开启			textView1.setText("WIFI开关：已启用");			button.setText("关闭Wifi");		} else {			textView1.setText("WIFI开关：已关闭");			button.setText("打开Wifi");		}		button.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub				if (button.getText().equals("关闭Wifi")) {					wifiManager.setWifiEnabled(false);					textView1.setText("WIFI开关：已关闭");					button.setText("打开Wifi");				} else if (button.getText().equals("打开Wifi")) {					wifiManager.setWifiEnabled(true);					textView1.setText("WIFI开关：已启用");					button.setText("关闭Wifi");				}			}		});				StringBuilder sBuilder = new StringBuilder();		if (wifiManager != null) {			List<ScanResult> wifiResults = wifiManager.getScanResults();			if (wifiResults != null && wifiResults.size() != 0) {				for (int i = 0; i < wifiResults.size(); i++) {					ScanResult wifi = wifiResults.get(i);					System.out.println(wifi.BSSID);					sBuilder.append("第"+i+"个可用Wifi：\n");					sBuilder.append("Wifi名称："+wifi.BSSID + "\n");				}			} else {				Toast.makeText(this, "请检查Wifi是否开启", Toast.LENGTH_LONG).show();				sBuilder.append("没有可用Wifi，请检查Wifi是否开启！");			}		}		textView2.setText(sBuilder);	}}

XML布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:padding="10dp" >    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <TextView            android:id="@+id/textView1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerVertical="true"            android:text="WIFI开关" />        <Button            android:id="@+id/button1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:text="开启Wifi" />    </RelativeLayout>    <TextView        android:id="@+id/textView2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="可用Wifi列表" /></LinearLayout>