WIFI状态的获取及监听

• 在Activit获取wifi状态
  

获取WIFI的开关状态

WifiManager wifiMgr = (WifiManager) this.getSystemService(WIFI_SERVICE);
int stat = wifiMgr.getWifiState(),

获取WIFI的连接状态

ConnectivityManager conMan = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
State wifi = conMan.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();

• 监听wifi状态

监听WIFI状态处理类

public class WifiStateReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context arg0, Intent intent) {

        // WIFI的开关状态处理
        if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {
            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
            switch (wifiState) {
            case WifiManager.WIFI_STATE_ENABLED:
            case WifiManager.WIFI_STATE_ENABLING:
                // 处于要启用的状态
                break;
            case WifiManager.WIFI_STATE_DISABLED:
            case WifiManager.WIFI_STATE_DISABLING:
                // 处于要停用的状态
                break;
            }
        }

        // WIFI的连接状态处理
        if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {
            Parcelable parcelable = intent
                    .getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
            if (parcelable instanceof NetworkInfo) {
                NetworkInfo networkInfo = (NetworkInfo) parcelable;
                switch (networkInfo.getState()) {
                case CONNECTED:
                    // TODO 连接上后的处理
                    break;
                case CONNECTING:
                case DISCONNECTING:
                case SUSPENDED:
                case UNKNOWN:
                    // TODO 非连接上的处理
                    break;
                }
            }
        }

        // WIFI详细信息获取
        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
            NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
        }
    }
}

AndroidManifest.xml的Pemisstion页添加权限
ACCESS_WIFI_STATE
ACCESS_NETWORK_STATE

AndroidManifest.xml的Application页，在Application Notes区域点击Add，选择Receiver

在Application页Attributes for Receiver区域，设置
Name属性为刚写的Receiver类WifiStateReceiver

再为WifiStateReceiver节点添加Intent Filter

再在intent-filters下添加下面三个Action

android.net.wifi.WIFI_STATE_CHANGED
android.net.wifi.STATE_CHANGE
android.net.wifi.supplicant.CONNECTION_CHANGE