Android下演示操作WIFI

首先需要添加权限：

    <uses-permission android:name="android.permission.ACCESS_NETWORK_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.CHANGE_WIFI_STATE" />

查看WIFI状态可以用：

			WifiManager wifimanager = (WifiManager) ActivityWifiDemo.this
					.getSystemService(Service.WIFI_SERVICE);

			boolean wifiEnabled = false;
			
			// 演示获取WIFI状态
			String strText = "";
			int state = wifimanager.getWifiState();
			switch (state) {
			case WifiManager.WIFI_STATE_DISABLED:
				strText = "Wifi Disabled";
				break;
			case WifiManager.WIFI_STATE_DISABLING:
				strText = "Wifi Disabling";
				break;
			case WifiManager.WIFI_STATE_ENABLED:
				strText = "Wifi Enabled";
				wifiEnabled = true;
				break;
			case WifiManager.WIFI_STATE_ENABLING:
				strText = "Wifi Enabling";
				break;
			case WifiManager.WIFI_STATE_UNKNOWN:
				strText = "Wifi Unknown state";
				break;
			default:
				strText = "Wifi State Error";

			}

修改WIFI状态可以用：

wifimanager.setWifiEnabled(!wifiEnabled);