Android10自动连接WiFi问题的解决

来自:网络
时间:2020-10-14
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说明:

本文主要说明扫码之后自动连接WiFi的一些处理,扫码的流程相对简单,网上教程也比较多,对于目前Android各个版本也没有太多变化。

问题描述:

最近在做项目的时候,发现以前的项目有扫描二维码自动连接WiFi的功能,设备改了生成二维码的方式,然后发现手机无法自动连接WiFi了。

问题原因:

经过代码调试发现:(我都是真机调试)

wifiManager.addNetwork(WifiConfiguration);

在添加WiFi的时候,这行代码始终返回-1,换用同事手机竟然神奇的可以连接,然后一脸蒙蔽,裂开了,不怕有问题,就怕有的有问题,有的没问题。

问题解决:

区别:我测试手机 小米10 android Q(andorid 10)的系统,同事手机荣耀 android P的系统,大胆猜测是不是android 10又搞了什么奇怪的东西

根因:皇天不负有心人,上代码:

/**
   * Add a new network description to the set of configured networks.
   * The {@code networkId} field of the supplied configuration object
   * is ignored.
   * <p/>
   * The new network will be marked DISABLED by default. To enable it,
   * called {@link #enableNetwork}.
   *
   * @param config the set of variables that describe the configuration,
   *      contained in a {@link WifiConfiguration} object.
   *      If the {@link WifiConfiguration} has an Http Proxy set
   *      the calling app must be System, or be provisioned as the Profile or Device Owner.
   * @return the ID of the newly created network description. This is used in
   *     other operations to specified the network to be acted upon.
   *     Returns {@code -1} on failure.
   *
   * @deprecated
   * a) See {@link WifiNetworkSpecifier.Builder#build()} for new
   * mechanism to trigger connection to a Wi-Fi network.
   * b) See {@link #addNetworkSuggestions(List)},
   * {@link #removeNetworkSuggestions(List)} for new API to add Wi-Fi networks for consideration
   * when auto-connecting to wifi.
   * <b>Compatibility Note:</b> For applications targeting
   * {@link android.os.Build.VERSION_CODES#Q} or above, this API will always return {@code -1}.
   */
  @Deprecated
  public int addNetwork(WifiConfiguration config) {
    if (config == null) {
      return -1;
    }
    config.networkId = -1;
    return addOrUpdateNetwork(config);
  }

这是WifiManager.class中addNetwork方法的描述,注意注释中最后一行

{@link android.os.Build.VERSION_CODES#Q} or above, this API will always return {@code -1}.

android Q或者更高的版本,这个方法始终返回-1,至此问题原因分析完毕,接下来开始解决:官网一顿操作:Android 10 的新方案如下连接:https://developer.android.google.cn/guide/topics/connectivity/wifi-bootstrap

 代码如下:

public void test()
  {
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q)
    {
      NetworkSpecifier specifier =
          new WifiNetworkSpecifier.Builder()
              .setSsidPattern(new PatternMatcher("此处WiFi名称", PatternMatcher.PATTERN_PREFIX))
              .setWpa2Passphrase("此处WiFi密码")
              .build();
 
      NetworkRequest request =
          new NetworkRequest.Builder()
              .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
              .removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
              .setNetworkSpecifier(specifier)
              .build();
 
      ConnectivityManager connectivityManager = (ConnectivityManager)
          context.getSystemService(Context.CONNECTIVITY_SERVICE);
 
      ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
        @Override
        public void onAvailable(Network network) {
          // do success processing here..
        }
 
        @Override
        public void onUnavailable() {
          // do failure processing here..
        }
      };
      connectivityManager.requestNetwork(request, networkCallback);
      // Release the request when done.
      // connectivityManager.unregisterNetworkCallback(networkCallback);
    }
  }

注:我用的是WPA的 加密模式,亲测可用。至此完结,撒花。

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