North Face's questions

使用登录名和密码，我向服务器发出请求，作为响应，我收到一个令牌，我将其保存在SharedPreferences. 之后，我转到另一个屏幕并尝试请求数据，但由于令牌丢失，我得到了 401。只有在应用程序重新启动后SharedPreferences才会更新in 的值。NetworkModule我需要在应用程序的当前启动中获取它并在授权后立即执行请求。所以我将实例传递SharedPreferences给AuthInterceptor.

val sharedPreferencesModule = module {
    single { androidApplication().getSharedPreferences(sharedPreferences, Context.MODE_PRIVATE) }
}

val networkModule = module {
fun provideRetrofit(factory: Gson, client: OkHttpClient, sharedPreferences: SharedPreferences): Retrofit {
        val logging = if (BuildConfig.DEBUG) {
            HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY)
        } else {
            HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BASIC)
        }

        return Retrofit.Builder()
            .baseUrl(BuildConfig.SERVER_URL)
            .addConverterFactory(GsonConverterFactory.create(factory))
            .addCallAdapterFactory(CoroutineCallAdapterFactory())
            .client(
                client.newBuilder()
                    .addInterceptor(logging)
                    .addInterceptor(AuthInterceptor(sharedPreferences.getString("auth_token","")))
                    .build()
            )
            .build()
    }

    single {
        provideRetrofit(
            get(),
            get(),
            androidApplication()
                .getSharedPreferences(
                    sharedPreferences,
                    Context.MODE_PRIVATE
                )
        )
    }
}

class AuthInterceptor(var token: String? = null) : Interceptor {
override fun intercept(chain: Interceptor.Chain): Response {
    val authHeader = chain.request().header("Authorization")

    val request: Request = if (authHeader.isNullOrEmpty() && !token.isNullOrEmpty()) {
        chain.request().newBuilder()
            .addHeader("Authorization", "Bearer $token")
            .build()
    } else {
        chain.request()
    }

    return chain.proceed(request)
  }
}

使用自签名证书请求 HTTPS 资源时出现问题如何处理？

javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.

我在应用程序的图库中使用多个照片，它可以工作。

...
result?.data?.clipData
...
val attr: BasicFileAttributes = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    Files.readAttributes(  
        File(getFilePath(result?.data?.clipData?.getItemAt(i)?.uri!!, this.requireContext())).toPath(),   
        BasicFileAttributes::class.java  
    )
} else {
    TODO("VERSION.SDK_INT < O")
}

但是，从三明治菜单中提供的应用程序（图库、文件、谷歌驱动器等）中选择照片时，我收到错误消息URI。URI符号设置%为。如何解决问题才能得到正确的URI。

java.lang.IllegalArgumentException: Invalid URI: content://com.google.android.apps.photos.contentprovider/-1/1/content%3A%2F%2Fmedia%2Fexternal%2Fimages%2Fmedia%2F31/ORIGINAL/NONE/image%2Fjpeg/1643916033

我创建了一个对话框custom_view。All width= wrap_content，但是，对话框本身，其背景是白色和match_parent。如何摆脱颜色，设置透明和改变宽度？

val dialog = with(Builder(this.context, R.style.ProgressDialogTheme)) {
    setView(R.layout.load_alert_dialog)
    setCancelable(false)
    setCanceledOnTouchOutside(false)
    create()
}

如何将数组添加到json？您只需要将现有数据包装在方括号中。就像在下面的 JSON 中一样。

using (StreamWriter w = File.CreateText("test.json"))
{
    JsonSerializer serializer = new JsonSerializer();
    serializer.Serialize(w, MyModel);
    w.Close();
}

[
  {
    "data":[
       {
        "Latitude":  37.7668,
        "Longitude": -122.3959,
        "Address":   ""
      },
      {
        "Latitude":  37.7668,
        "Longitude": -122.3959,
        "Address":   ""
      }
    ]
  }
]

需要将绘图点定位在光标下，鼠标的锐边在中心。使用此选项，画布上的点不会被绘制。如果您安装时没有偏移，那么一切正常。

 public void DrawPoint(Point point, Canvas canvas)
    {
        Ellipse el = new Ellipse();
        el.Width = 10;
        el.Height = 10;
        el.SetValue(Canvas.LeftProperty, point.X);
        el.SetValue(Canvas.TopProperty, point.Y);
        el.Fill = Brushes.Red;

        // Добавление графического элемента на холст.
        canvas.Children.Add(el);
    }

    private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        Point point = e.GetPosition(Canvas);
        point.Offset(-5.0, -5.0);

        DrawPoint(point, Canvas);
    }

    private void Canvas_MouseMove(object sender, MouseEventArgs e)
    {
        if (Canvas.Children.Count !=0)
        {
            Canvas.Children.RemoveAt(Canvas.Children.Count - 1);
        }
        Point point = e.GetPosition(Canvas);
        point.Offset(-5.0, -5.0);
        DrawPoint(point, Canvas);
    }

<Canvas  
MouseMove="ContentPanel_MouseMove" 
MouseEnter="ContentPanel_MouseEnter" 
MouseLeave="ContentPanel_MouseLeave"  
MouseLeftButtonDown="Canvas_MouseLeftButtonDown" 
x:Name="Canvas" 
Margin="0,10,0,0" 
Panel.ZIndex="998" 
HorizontalAlignment="Left" 
VerticalAlignment="Top"/>

有一个带有图像的列表框。用户用鼠标在ListBox中选择一张图片，将键盘上的箭头在列表中向右移动（From Image，当前元素的Source用于增加）。在当前实现中，不设置为当前索引的位置。使用当前正确的索引，它将选择从移动的图像中设置为 +1，如果您将其设置为 hard ContainerFromIndex(3)，它还会以相同的方式将其设置为 +1，在另一个方向上设置为 -1。怎么看不到0，在+1和-1之间。

ListBoxPhotos.Items.Insert(Index + 2, img);
ListBoxPhotos.Items.RemoveAt(Index);
ListBoxPhotos.SelectedItem = null;
ListBoxPhotos.SelectedIndex = Index + 1;
ListBoxItem listBoxItem = ListBoxPhotos.ItemContainerGenerator.ContainerFromIndex(Index) as ListBoxItem;
listBoxItem.Focus();

<ListBox 
    SelectionChanged="ListBoxItemClick" 
    SelectionMode="Single" 
    x:Name="ListBoxPhotos"  
    ScrollViewer.VerticalScrollBarVisibility="Disabled" 
    VerticalAlignment="Center" 
    Background="#FF5CB57A" 
    BorderBrush="{x:Null}" KeyDown="StackPanel_KeyDown">
        <ListBox.ItemsPanel>
            <ItemsPanelTemplate>
                <StackPanel Orientation="Horizontal" KeyDown="StackPanel_KeyDown"/>
            </ItemsPanelTemplate>
         </ListBox.ItemsPanel>
</ListBox>

这个选项做它需要做的，它只是显示一个MessageBox，这里不需要。每次显示并且焦点更改或某些属性时。我无法弄清楚哪个属性正在改变。如果已定义，则可以在没有 MessageBox 的情况下以编程方式调用它。

for (int i = 0; i < ListBoxPhotos.Items.Count; i++)
{
    object yourObject = ListBoxPhotos.Items[i];
    ListBoxItem lbi = (ListBoxItem)ListBoxPhotos.ItemContainerGenerator.ContainerFromItem(yourObject);

    if (lbi.IsFocused)
    {
        MessageBox.Show("Item at index " + i.ToString() + " has the focus.");
        break;
    }
    ListBoxPhotos.SelectedIndex = Index + 1;
    ListBoxItem listBoxItem = ListBoxPhotos.ItemContainerGenerator.ContainerFromIndex(ListBoxPhotos.SelectedIndex - 1) as ListBoxItem;
    listBoxItem.Focus();

}

如何从数组[Point(x1,y1), Point(x2,y2),..Point(xN,yN)]中确定一个图形的面积（以像素为单位）？

如何在里面画一个透明的圆？

  <div id="contain"></div>

  var svg = document.createElement('svg');
  svg.id = id;
  svg.style.border = '1px solid;';
  svg.style.borderRadius = '50%';
  svg.style.background = 'red';
  svg.style.position = 'absolute';
  svg.setAttribute("class", "newDiv")
  svg.style.width = 20 + "px";
  svg.style.height = 20 + "px";
  svg.style.left = obj.X - 8 + 'px';
  svg.style.top = obj.Y - 8 + 'px';
  svg.innerHTML = '<circle cx="10" cy="10" r="6"></circle>'
  contain.appendChild(svg);

数据来自数据库。第一次出现在recycleView 上时，记录（编号）显示正确。当您移动到某个元素并返回列表时，条目数可能会减少。您只能通过 update 重置状态notifyDataSetChanged()，但是，如果您在 中运行observer，则不会发生任何事情。

Fragment

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)

    recyclerViewEmployee.also { rv ->
        rv.layoutManager = LinearLayoutManager(activity)
        rv.addItemDecoration(DividerItemDecoration(activity, LinearLayoutManager.VERTICAL))
        rv.adapter = specialityAdapter
    }

    (arguments?.get("specialty") as Specialty).let { it ->
        specialtyName = it.name

        employeeSpecialtyViewModel.getAllEmployee(it.specialtyId)
            .observe(viewLifecycleOwner, Observer { response ->
                response?.also {
                    specialityAdapter.updateData(response)
                    recyclerViewEmployee.recycledViewPool.clear()
                }
            })
    }
}

将错误重置为正常操作：

    test.setOnClickListener {
        (recyclerViewEmployee.adapter as EmployeeAdapter).notifyDataSetChanged()
    }

updataData()

fun updateData(data: List<Employee>) {
    this.employeeList = data
    notifyDataSetChanged()
}

开始学习 Qt 和 C++。问题：

如何在单击时从列表中获取对象，或者更确切地说是引用对象的 json 字段？

如何正确地从 json 对象数组中创建一个列表？

比如它来了{"array":[{"id": "1", "title": "item1"}, {"id": "2", "title": "item2"}]}，你需要显示一个带有标题的列表（例如，QListWidget），并且当你点击一个元素（例如，clicked slot）时，在该元素的debug id中显示对应的json。

我正在为 laravel 使用 PhpOffice(PhpWord) 插件。有必要为文档制作这样的标题。我认为你可以这样做：

$styleTable = array('borderSize' => 6, 'borderColor' => '999999');
$phpWord->addTableStyle('Colspan Rowspan', $styleTable);
$table = $section->addTable('Colspan Rowspan');

$row = $table->addRow();

$row->addCell(null, array('vMerge' => 'restart'))->addText('A');
$row->addCell(null)->addText('B');
$row->addCell()->addText('1');

$row = $table->addRow();
$row->addCell(null, array('vMerge' => 'continue'));
$row->addCell(null, array('vMerge' => 'continue', 'gridSpan' => 2));
$row->addCell()->addText('2');
$row = $table->addRow();
$row->addCell(null, array('vMerge' => 'continue'));
$row->addCell()->addText('C');
$row->addCell()->addText('D');
$row->addCell()->addText('3');

获取文件的路径/storage/emulated/0/Download/test.xls？

无法从：Uri: content://com.android.providers.downloads.documents/document/1764

有必要使用 PHP 工具将其带到表单中：

[
  {
    "first_name":"Николай",
    "phone":"+7XXXXXXXXXX",
    "second_name":"Петров",
    "weight":"81"
  }
]

[
    {
    "name":"first_name",
    "value":"Николай"
    },
    {
    "name":"phone",
    "value":"+7XXXXXXXXXX"
    },
    {
    "name":"second_name",
    "value":"Петров"
    },
    {
    "name":"weight",
    "value":"81"
    }
]

我通过库https://github.com/dompdf/dompdf生成 pdf 。必须使用字体TimesNewRoman.ttf。在生成过程中，所有俄语字符都更改为?????.

如何在json中得到这样的结果？通过 php 和/或 js。

三个设备中有一个电路：Arduino + RS485 to TTL。其中一个 arduino 充当控件（收集数据）。主 - 始终设置为接收，从 - 侦听器切换为发送，每隔几秒一次。在主设备上，仅从一个设备接收，这将是第一个发送信号的设备。怎么修？我需要从所有 arduino 接收数据，而不仅仅是从第一个及时接收数据。

MASTER

/*
  Библиотека для работы с JSON
*/
#include <ArduinoSTL.h>

/*
  Библиотека для работы с JSON
*/
#include <ArduinoJson.h>

/*
  Контакт 2 переключает режим приёмник/передатчик
*/
#define SerialTxControl 2

#define RS485Transmit HIGH
#define RS485Receive LOW

char buffer[100];
byte state = 0;

/*
   Массив для хранения показателей приборов
*/
char *dev[12];

StaticJsonDocument<200> doc;

void setup(void)
{
  Serial.begin(9600);
  pinMode(13, OUTPUT);
  pinMode(SerialTxControl, OUTPUT);

  /*
    Переключение устройства в режим приёмника
  */
  digitalWrite(SerialTxControl, RS485Receive);

  while (!Serial)
    continue;
}

void loop(void)
{
  if (Serial.available())
  {
    if (Serial.available())
    {
      String response = Serial.readString();

      DeserializationError error = deserializeJson(doc, response);

      if (error)
      {
        Serial.print(F("deserializeJson() failed: "));
        Serial.println(error.c_str());
        return;
      }

      const char *device = doc["device"];
      String temperature = doc["temperature"];
      int is_locked = doc["is_locked"];

      Serial.print("Device: " + String(device) + " | ");
      Serial.print("Temperature: " + temperature + " | ");
      Serial.print("Is locked: " + String(is_locked) + " | ");
      Serial.println();
    }
  }
}

SLAVE

/*
  Библиотека для работы с JSON
*/
#include <ArduinoJson.h>

/*
  Контакт 2 переключает режим приёмник/передатчик
*/
#define SerialTxControl 2

#define RS485Transmit HIGH
#define RS485Receive LOW

/*
  Номер устройства
*/
#define ID "1"

StaticJsonDocument<200> doc;

void setup(void)
{
  Serial.begin(9600);
  pinMode(SerialTxControl, OUTPUT);

  /*
    Переключение устройства в режим передатчика
  */
  digitalWrite(SerialTxControl, RS485Receive);

  while (!Serial)
    continue;
}

void loop(void)
{

digitalWrite(SerialTxControl, RS485Transmit);

doc["device"] = ID;
doc["temperature"] = String(random(24, 26));
doc["is_locked"] = random(0, 1);

String(serializeJson(doc, Serial));

digitalWrite(SerialTxControl, RS485Receive);
delay(4000);
}

如何为每个用户从另一个表中获取具有角色的用户数组？有表users（id、name、email、email_verified_at、password、remember_token、created_at、updated_at）和roles（id、name、created_at、updated_at）。有必要在 UI 上显示用户及其角色的数据透视表。

还有一个链接表role_user：

[ id | user_id | role_id ]

class Role extends Model
{
    public function users()
    {
        return $this->belongsToMany('App\User', 'role_user', 'role_id', 'user_id');
    }
}

class User extends Authenticatable
{
...
    public function roles()
    {
        return $this->belongsToMany('App\Role', 'role_user', 'user_id', 'role_id');
    }
}

结果和预期的一样，只有用户对应不同的权限：

任务：我们需要为通知计数器添加背景Navigation Drawer。
问题：添加background后，height仍然等于元素。我添加了<shape>，但没有考虑那里设置的高度。

<item
    android:id="@+id/action_notifications"
    app:actionViewClass="android.widget.TextView"
    android:icon="@drawable/ic_notifications"
    android:title="@string/notifications" />   

notify = nav_view.menu.findItem(R.id.action_notifications).actionView as TextView
        notify.gravity = Gravity.CENTER_VERTICAL
        notify.setTypeface(null, Typeface.BOLD)
        notify.setTextColor(ResourcesCompat.getColor(resources, R.color.colorAccent, null))   

出了什么问题，我该如何解决？

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.root.pets/com.example.root.pets.MainActivity}: java.lang.RuntimeException: cannot find implementation for com.example.root.pets.AppDatabase. AppDatabase_Impl does not exist

@Entity
class Person {
    @PrimaryKey
    internal var name: String? = null
    internal var age: Int = 0
    internal var favoriteColor: String? = null
}

@Dao
interface PersonDao {

    // Получение всех Person из бд
    @get:Query("SELECT * FROM person")
    val allPeople: List<Person>

    // Добавление Person в бд
    @Insert
    fun insertAll(vararg people: Person)

    // Удаление Person из бд
    @Delete
    fun delete(person: Person)

    // Получение всех Person из бд с условием
    @Query("SELECT * FROM person WHERE favoriteColor LIKE :color")
    fun getAllPeopleWithFavoriteColor(color: String): List<Person>

}

@Database(entities = arrayOf(Person::class /*, AnotherEntityType.class, AThirdEntityType.class */), version = 1)
abstract class AppDatabase : RoomDatabase() {
    abstract val personDao: PersonDao
}

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val myThread = Thread(object : Runnable {
        override fun run() {

            var db = Room.databaseBuilder(getApplicationContext(),
                    AppDatabase::class.java, "populus-database4").build()

            val everyone = db.personDao
            val person = Person()
            person.name = "John Smith"
            person.age = 10000
            person.favoriteColor = "black"

            everyone.insertAll(person)
            val persons = everyone.allPeople
            Log.d("111", "${everyone.allPeople[0].name}")
        }
    })
    myThread.start()

    }
}