Android治理WIFI
Android管理WIFI
首先,需要权限
<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
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
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; } } }
示例工程下载:点击打开链接