小编Cos*_*ihu的帖子

我需要一些有关Android布局的帮助.我有以下代码:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<android.support.constraint.Guideline
    android:id="@+id/guideline"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.5" />

<android.support.constraint.Guideline
    android:id="@+id/guideline2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.725" />

<TextView
    android:id="@+id/data_field_1_name"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="10dip"
    android:layout_marginTop="10dip"
    app:layout_constraintLeft_toLeftOf="@id/guideline"
    app:layout_constraintRight_toLeftOf="@id/guideline2"
    app:layout_constraintTop_toTopOf="parent"
    tools:text="ACTIVE" />

<TextView
    android:id="@+id/data_field_1_value"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="15dip"
    android:layout_toEndOf="@id/data_field_1_name"
    app:layout_constraintBaseline_toBaselineOf="@id/data_field_1_name"
    app:layout_constraintLeft_toLeftOf="@id/guideline2"
    app:layout_constraintRight_toRightOf="parent"
    tools:text="1750" />

<TextView
    android:id="@+id/data_field_2_name"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="10dip"
    android:layout_marginTop="8dip"
    app:layout_constraintLeft_toLeftOf="@id/guideline"
    app:layout_constraintRight_toLeftOf="@id/guideline2"
    app:layout_constraintTop_toBottomOf="@id/data_field_1_name"
    tools:text="ACTIVE" />

<TextView
    android:id="@+id/data_field_2_value"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="15dip"
    android:layout_toEndOf="@id/data_field_2_name"
    app:layout_constraintBaseline_toBaselineOf="@id/data_field_2_name"
    app:layout_constraintLeft_toLeftOf="@id/guideline2"
    app:layout_constraintRight_toRightOf="parent"
    tools:text="1750" />


<TextView
    android:id="@+id/data_field_3_name"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="10dip"
    android:layout_marginTop="8dip"
    app:layout_constraintLeft_toLeftOf="@id/guideline"
    app:layout_constraintRight_toLeftOf="@id/guideline2"
    app:layout_constraintTop_toBottomOf="@id/data_field_2_name"
    tools:text="ACTIVE" />

<TextView …

我有一个关于 kotlin 流合并的问题。看看下面的乐趣。

suspend fun method(filter: String): Flow<List<Model>> {

// Search.
val models: List<Model> = repo.getModels(filter)  // suspend function

// Get favorites
val favoritesFlow: Flow<List<Int>> = otherRepo.getFavorites()

// Return models as Flow, but mark/unmark every model as favorite when favoritesFlow is updated.
??? val result = models + favoritesFlow ????

    return result
}

我需要返回模型列表流，但是当最喜欢的流更改时，我必须将每个模型标记或取消标记为最喜欢的。你知道我该怎么做吗？