Can I turn on WiFi-Direct from code? on Android API-14 (ICS)

I'm using the new Wi-Fi Direct API from google on Android 4.0 and in Sample code they send the User to Settings, to activate WiFi -Direct Mode.

Is there a way to Start it by code???

all they offer is to listen to WIFI_P2P_STATE_CHANGED_ACTION intent, and then use this code

String action = intent.getAction();

if (WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(action)) {

   // UI update to indicate wifi p2p status.
   int state = intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, -1);

   if (state == WifiP2pManager.WIFI_P2P_STATE_ENABLED) {
       // Wifi Direct mode is enabled

   } else {
       // Wifi Direct mode is disabled
   }

Ciaran Fisher

Yes there is a way using reflection. Works on my GSII (and fails gracefully on non Wifi Direct HTC Sensation) but as this is reflection it may not work on all phones.

p2pManager = (WifiP2pManager) getSystemService(WIFI_P2P_SERVICE);
channel = p2pManager.initialize(getApplicationContext(),
        getMainLooper(), null);

try {
    Class<?> wifiManager = Class
            .forName("android.net.wifi.p2p.WifiP2pManager");

    Method method = wifiManager
            .getMethod(
                "enableP2p",
                new Class[] { android.net.wifi.p2p.WifiP2pManager.Channel.class });

    method.invoke(p2pManager, channel);

} catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

Please note:

On Jelly Bean and above, when you try to use the WifiP2pManager API, WiFi-Direct is automatically enabled (as long as WiFi is on), so there is no need to use this hack.

Seshu Vinay

No, all you could do is notify the user to turn on WiFi.

On some devices, even though Wi-Fi direct is supported, it's not enabled due to some system bugs. Here's a more reliable way to check whether it's enabled (unfortunately it requires root) using Kotlin.

val matcher = "^mNetworkInfo .* (isA|a)vailable: (true|false)"
    .toPattern(Pattern.MULTILINE)
    .matcher(su("dumpsys ${Context.WIFI_P2P_SERVICE}"))
if (!matcher.find()) return "Root unavailable"
if (matcher.group(2) != "true") return "Wi-Fi Direct unavailable"
return "Wi-Fi Direct available"

This should work for Android 4.3 - 8.1. Check source code below:

来源：https://stackoverflow.com/questions/8571566/can-i-turn-on-wifi-direct-from-code-on-android-api-14-ics

标签

android-wifi

android

android-4.0-ice-cream-sandwich