如何从BroadcastReceiver打开内部无线设置

<receiver android:name=".MyBroadcastReceiver">
    <intent-filter>
        <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
    </intent-filter>
</receiver>

public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION)) {
            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN);
            if (wifiState == WifiManager.WIFI_STATE_ENABLED) {
                // 打开内部无线设置
                Intent wifiSettingsIntent = new Intent(Settings.ACTION_WIFI_SETTINGS);
                wifiSettingsIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                context.startActivity(wifiSettingsIntent);
            }
        }
    }
}

Intent wifiStateChangedIntent = new Intent(WifiManager.WIFI_STATE_CHANGED_ACTION);
context.sendBroadcast(wifiStateChangedIntent);