我可以通过代码打开 WiFi-Direct 吗?在 Android API-14 (ICS) 上 [英] Can I turn on WiFi-Direct from code? on Android API-14 (ICS)

问题描述

我在 Android 4.0 上使用来自谷歌的新 Wi-Fi Direct API并在示例代码中，他们将用户发送到设置，以激活 WiFi -直接模式.

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.

有没有办法通过代码启动它???

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

他们提供的只是侦听 WIFI_P2P_STATE_CHANGED_ACTION 意图，然后使用此代码

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
   }

推荐答案

是的，有一种使用反射的方法.适用于我的 GSII(在非 Wifi Direct HTC Sensation 上正常失败)但由于这是反射，它可能不适用于所有手机.

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();
}

请注意:

在 Jelly Bean 及更高版本上，当您尝试使用 WifiP2pManager API 时，WiFi-Direct 会自动启用(只要 WiFi 处于开启状态)，因此无需使用此 hack.

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.

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