Android管理WIFI

首先，需要权限

[html]
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>

   <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
WIF的状态在WifiManager中定义了常量，都是public static final int类型的，如下

[java]
public static final int WIFI_STATE_DISABLED
Wi-Fi is disabled.
Constant Value: 1 (0x00000001)

public static final int WIFI_STATE_DISABLING
Wi-Fi is currently being disabled. The state will change to WIFI_STATE_DISABLED if it finishes successfully.
Constant Value: 0 (0x00000000)

public static final int WIFI_STATE_ENABLED
Wi-Fi is enabled.
Constant Value: 3 (0x00000003)

public static final int WIFI_STATE_ENABLING
Wi-Fi is currently being enabled. The state will change to WIFI_STATE_ENABLED if it finishes successfully.
Constant Value: 2 (0x00000002)

public static final int WIFI_STATE_UNKNOWN
Wi-Fi is in an unknown state. This state will occur when an error happens while enabling or disabling.
Constant Value: 4 (0x00000004)

public static final int WIFI_STATE_DISABLED
Wi-Fi is disabled.
Constant Value: 1 (0x00000001)

public static final int WIFI_STATE_DISABLING
Wi-Fi is currently being disabled. The state will change to WIFI_STATE_DISABLED if it finishes successfully.
Constant Value: 0 (0x00000000)

public static final int WIFI_STATE_ENABLED
Wi-Fi is enabled.
Constant Value: 3 (0x00000003)

public static final int WIFI_STATE_ENABLING
Wi-Fi is currently being enabled. The state will change to WIFI_STATE_ENABLED if it finishes successfully.
Constant Value: 2 (0x00000002)

public static final int WIFI_STATE_UNKNOWN
Wi-Fi is in an unknown state. This state will occur when an error happens while enabling or disabling.
Constant Value: 4 (0x00000004)

定义一个并且初始化WifiManager manager==(WifiManager) Context.getSystemService(Context.WIFI_SERVICE);

启动WIFI manager.setWifiEnabled(true);

关闭WIFI manager.setWifiEnabled(false);

获取WIFI状态 manager.getWifiState();返回前面说的五种状态的一种

下面是全部代码

[java]
package com.zhycheng.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 WIFIDemoActivity extends Activity implements OnClickListener {
    Button start,stop,state;
    WifiManager manager;


    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        start=(Button) findViewById(R.id.startWIFI);
        stop=(Button) findViewById(R.id.stopWIFI);
        state=(Button) findViewById(R.id.getSTATE);
        start.setOnClickListener(this);
        stop.setOnClickListener(this);
        state.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        manager=(WifiManager) this.getSystemService(Context.WIFI_SERVICE);

        switch(v.getId())
        {
        case R.id.startWIFI:
            manager.setWifiEnabled(true);
            System.out.println("当前WIFI状态为"+manager.getWifiState());
            Toast.makeText(this, "当前WIFI状态为"+manager.getWifiState(), Toast.LENGTH_SHORT).show();

            break;
        case R.id.stopWIFI:
            manager.setWifiEnabled(false);
            System.out.println("当前WIFI状态为"+manager.getWifiState());
            Toast.makeText(this, "当前WIFI状态为"+manager.getWifiState(), Toast.LENGTH_SHORT).show();

            break;
        case R.id.getSTATE:

            System.out.println("当前WIFI状态为"+manager.getWifiState());
            Toast.makeText(this, "当前WIFI状态为"+manager.getWifiState(), Toast.LENGTH_SHORT).show();
            break;
        }

    }
}

package com.zhycheng.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 WIFIDemoActivity extends Activity implements OnClickListener {
Button start,stop,state;
WifiManager manager;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

补充：移动开发 , Android ,