private WifiManager mWm;
mWm = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
if (mWm.isWifiEnabled()) {
mWm.setWifiEnabled(false);
txt.setText("Wifi OFF");
}
else {
mWm.setWifiEnabled(true);
txt.setText("Wifi ON");
}
Manifest中要增加如下权限:
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<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>