Android12中使用Settings.ACTION_WIFI_ADD_NETWORKS结合startActivityForResult时应用崩溃

问题详情 #

使用Xamarin Android开发，目标框架为Android 12，通过以下代码保存WiFi网络配置时，在Android 12设备上频繁出现随机崩溃，崩溃时VS2022调试器仍保持连接。

代码实现 #

private void AddWifi(string ssid, string psk)
{
    var suggestions = new List<IParcelable>
    {
        new WifiNetworkSuggestion.Builder()
                .SetSsid(ssid)
                .SetWpa2Passphrase(psk)
                .Build()
    };
    var bundle = new Bundle();
    bundle.PutParcelableArrayList(ExtraWifiNetworkList, suggestions);
    var intent = new Intent(ActionWifiAddNetworks);
    intent.PutExtras(bundle);
    MainActivity.Instance.StartActivityForResult(intent, RequestCodeConstants.WifiRequestCode);
}

日志信息 #

Visual Studio输出 #

[DecorView[]] onWindowFocusChanged hasWindowFocus false
[tWriterEnhance] Explicit concurrent copying GC freed 119792(5287KB) AllocSpace objects, 5(164KB) LOS objects, 24% free, 5230KB/6974KB, paused 91us,85us total 54.456ms
[Activity] PerfMonitor: Slow Operation: Activity com.packagename/crc647e3ada291cd56112.MainActivity onDestroy took 627ms
[Choreographer] Skipped 61 frames!  The application may be doing too much work on its main thread.
[Looper] PerfMonitor doFrame : time=0ms vsyncFrame=0 latency=683ms procState=-1 historyMsgCount=2 (msgIndex=2 wall=671ms seq=47927 late=20ms h=android.app.ActivityThread$H w=159)

Android Studio Logcat日志 #

getRecentTasks: taskId=925   userId=0   baseIntent=Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.packagename/crc647e3ada291cd56112.MainActivity }
2023-03-09 21:50:10.680  1784-12912 ActivityTaskManager     system_server                        W    Force finishing activity com.packagename/crc647e3ada291cd56112.MainActivity
2023-03-09 21:50:11.859  7578-7578  tWriterEnhance          com...Inc.packagename  I  Explicit concurrent copying GC freed 119792(5287KB) AllocSpace objects, 5(164KB) LOS objects, 24% free, 5230KB/6974KB, paused 91us,85us total 54.456ms
2023-03-09 21:50:11.986  7578-7578  Activity                com...Inc.packagename  W  PerfMonitor: Slow Operation: Activity com.packagename/crc647e3ada291cd56112.MainActivity onDestroy took 627ms
2023-03-09 21:50:11.997  1784-12916 InputManager-JNI        system_server                        W  Input channel object '22029a1 com.packagename/crc647e3ada291cd56112.MainActivity (client)' was disposed without first being removed with the input manager!
2023-03-09 21:50:12.008  7578-7578  Choreographer           com...Inc.packagename  I  Skipped 61 frames!  The application may be doing too much work on its main thread.
2023-03-09 21:50:12.009  7578-7578  Looper                  com...Inc.packagename  W  PerfMonitor doFrame : time=0ms vsyncFrame=0 latency=683ms procState=-1 historyMsgCount=2 (msgIndex=2 wall=671ms seq=47927 late=20ms h=android.app.ActivityThread$H w=159)
2023-03-09 21:50:16.005  3068-3393  ActivityManagerWrapper  com.miui.home                        E  getRecentTasks: taskId=925   userId=0   baseIntent=Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.packagename

解决方案 #

1. 权限检查与申请：确保已动态申请ACCESS_FINE_LOCATION、CHANGE_WIFI_STATE、ACCESS_WIFI_STATE权限，Android 12添加WiFi网络需这三项权限，且必须动态获取。
2. 替换API：放弃使用ActionWifiAddNetworks Intent方式，改用Android 12推荐的WifiManager.AddNetworkSuggestions API，该API兼容性更好，能避免系统层面的崩溃问题。
3. 上下文优化：避免使用MainActivity.Instance单例启动Intent，改用当前Activity的上下文（如this或Activity.Current），防止Activity销毁后引用无效上下文导致崩溃。
4. 主线程优化：日志显示主线程存在卡顿，将WiFi配置相关操作移至后台线程执行，减少主线程负载。

内容的提问来源于stack exchange，提问作者Santos