忘记旧的WiFi Direct连接

Question

有没有一种方法可以在代码中忘记旧的WiFi Direct连接？我需要这样做来改变谁成为组所有者。我设置groupOwnerIntent = 15，但仍然无法成为组所有者。

- nikhil_vyas

Answer 1

如果您只想断开现有的WiFiP2p连接，只需调用WiFiP2pManager#removeGroup。无论设备是GO还是peer都可以。

如果您想忘记持久组，也可以删除它们。但这只能通过反射实现。无论设备是GO还是peer。

    manager.removeGroup(channel, new WifiP2pManager.ActionListener() {
        @Override
        public void onSuccess() {
            Log.d(TAG, "removeGroup success");
            deletePersistentGroup(group);
        }

        @Override
        public void onFailure(int reason) {
            Log.d(TAG, "removeGroup fail: " + reason);
        }
    });

这里的manager是WiFip2pManager的实例。而deletePersistanteGroup(WiFiP2pGroup group)则是：

    private void deletePersistentGroup(WifiP2pGroup wifiP2pGroup) {
        try {

            Method getNetworkId = WifiP2pGroup.class.getMethod("getNetworkId");
            Integer networkId = (Integer) getNetworkId.invoke(wifiP2pGroup);
            Method deletePersistentGroup = WifiP2pManager.class.getMethod("deletePersistentGroup",
                    WifiP2pManager.Channel.class, int.class, WifiP2pManager.ActionListener.class);
            deletePersistentGroup.invoke(manager, channel, networkId, new WifiP2pManager.ActionListener() {
                @Override
                public void onSuccess() {
                    Log.e(TAG, "deletePersistentGroup onSuccess");
                }

                @Override
                public void onFailure(int reason) {
                    Log.e(TAG, "deletePersistentGroup failure: " + reason);
                }
            });
        } catch (NoSuchMethodException e) {
            Log.e("WIFI", "Could not delete persistent group", e);
        } catch (InvocationTargetException e) {
            Log.e("WIFI", "Could not delete persistent group", e);
        } catch (IllegalAccessException e) {
            Log.e("WIFI", "Could not delete persistent group", e);
        }
    }

更新

如果想成为GO（组群拥有者），在邀请其他设备之前，你需要调用WiFiP2pManager#createGroup()方法。

- Niakros