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Wifi网卡状态
10余年的冷水滩网站建设经验,针对设计、前端、开发、售后、文案、推广等六对一服务,响应快,48小时及时工作处理。营销型网站的优势是能够根据用户设备显示端的尺寸不同,自动调整冷水滩建站的显示方式,使网站能够适用不同显示终端,在浏览器中调整网站的宽度,无论在任何一种浏览器上浏览网站,都能展现优雅布局与设计,从而大程度地提升浏览体验。成都创新互联从事“冷水滩网站设计”,“冷水滩网站推广”以来,每个客户项目都认真落实执行。
WIFI_STATE_DISABLED Wifi网卡不可用
WIFI_STATE_DIABLING Wifi网卡正在关闭
WIFI_STATE_ENABLED Wifi网卡可用
WIFI_STATE_ENABLING Wifi网卡正在打开
WIFI_STATE_UNKNOWN 未知网卡状态
操作Wifi网卡所需要的权限
CHANGE_NETWORK_STATE 改变网络连接状态
CHANGE_WIFI_STATE 改变Wifi连接状态
ACCESS_NETWORK_STATE 允许应用获取网络状态信息
ACCESS_WIFI_STATE 允许应用获取Wifi状态信息
界面activity_main.xml
需要的权限
MainActivity.java
public class MainActivity extends Activity { 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.activity_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)MainActivity.this.getSystemService(Context.WIFI_SERVICE); wifiManager.setWifiEnabled(true); System.out.println("wifi state --->" + wifiManager.getWifiState()); Toast.makeText(MainActivity.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)MainActivity.this.getSystemService(Context.WIFI_SERVICE); wifiManager.setWifiEnabled(false); System.out.println("wifi state --->" + wifiManager.getWifiState()); /* getWifiState返回下面五个常量之一 下面的五个常量都是在WifiManager类中预定义的 public static final int WIFI_STATE_DISABLING = 0; public static final int WIFI_STATE_DISABLED = 1; public static final int WIFI_STATE_ENABLING = 2; public static final int WIFI_STATE_ENABLED = 3; public static final int WIFI_STATE_UNKNOWN = 4; */ Toast.makeText(MainActivity.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)MainActivity.this.getSystemService(Context.WIFI_SERVICE); System.out.println("wifi state --->" + wifiManager.getWifiState()); Toast.makeText(MainActivity.this, "当前Wifi网卡状态为" + wifiManager.getWifiState(), Toast.LENGTH_SHORT).show(); } } }