Android打开WIFI、关闭WIFI、检测当前WIFI状态

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
WifiManager wifi =(WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
wifi.setWifiEnabled(true);
}
});

button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
WifiManager wifi = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
wifi.setWifiEnabled(false);
}
});

button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
WifiManager wifi = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
int wifiState = wifi.getWifiState();
Toast.makeText(mContext, "状态是"+wifiState, Toast.LENGTH_SHORT).show();
}
});

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