mars老师[Android开发视频教学]01_23 WIFI网络操作

<?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:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button 
	android:id="@+id/startWifi"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="启动手机的wifi网卡"
    />
<Button 
	android:id="@+id/stopWifi"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="关闭手机的wifi网卡"
    />
<Button 
	android:id="@+id/checkWifi"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="检查当前wifi网卡状态"
    />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
	package="mars.wifi" android:versionCode="1" android:versionName="1.0">
	<application android:icon="@drawable/icon" android:label="@string/app_name">
		<activity android:name=".WifiActivity" android:label="@string/app_name">
			<intent-filter>
				<action android:name="android.intent.action.MAIN" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
		</activity>

	</application>
	<uses-sdk android:minSdkVersion="4" />
	<!-- 以下是使用wifi访问网络所需要的权限 -->
	<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>
	<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
</manifest>

package mars.wifi;

import android.app.Activity;
import android.content.Context;
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.Toast;

public class WifiActivity extends Activity {
    /** Called when the activity is first created. */
	private Button startButton = null;
	private Button stopButton = null;
	private Button checkButton = null;
	private WifiManager wifiManager = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        startButton = (Button)findViewById(R.id.startWifi);
        stopButton = (Button)findViewById(R.id.stopWifi);
        checkButton = (Button)findViewById(R.id.checkWifi);
        startButton.setOnClickListener(new StartWifiListener());
        stopButton.setOnClickListener(new StopWifiListener());
        checkButton.setOnClickListener(new CheckWifiListener());
    }
    class StartWifiListener implements OnClickListener{

		@Override
		public void onClick(View v) {
			wifiManager = (WifiManager)WifiActivity.this.getSystemService(Context.WIFI_SERVICE);
			wifiManager.setWifiEnabled(true);
			System.out.println("wifi state --->" + wifiManager.getWifiState());
			Toast.makeText(WifiActivity.this, "当前Wifi网卡状态为" + wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();
		}
    }
    class StopWifiListener implements OnClickListener{

		@Override
		public void onClick(View arg0) {
			// TODO Auto-generated method stub
			wifiManager = (WifiManager)WifiActivity.this.getSystemService(Context.WIFI_SERVICE);
			wifiManager.setWifiEnabled(false);
			System.out.println("wifi state --->" + wifiManager.getWifiState());
			Toast.makeText(WifiActivity.this, "当前Wifi网卡状态为" + wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();
		}
    
    }
    
    class CheckWifiListener implements OnClickListener{

		@Override
		public void onClick(View v) {
			wifiManager = (WifiManager)WifiActivity.this.getSystemService(Context.WIFI_SERVICE);
			System.out.println("wifi state --->" + wifiManager.getWifiState());
			Toast.makeText(WifiActivity.this, "当前Wifi网卡状态为" + wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();
		}
    	
    }
}