android - 如何在约束布局中动态设置权重

Question

我需要动态地实现以下布局的等价物。我尝试过的代码适用于位置，元素按我想要的方式对齐，但权重值不会改变任何东西。我还没有想出如何让搜索栏缩小其宽度，以便为切换按钮提供足够的空间，而不是将其推到一边。

Xml 等同于我想要动态编码的内容:

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <no.beiningbogen.snute.common.view.TouchAwareSeekBar
        android:id="@+id/touchAwareSeekBar"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:dsb_indicatorColor="@color/discrete_seek_bar"
        app:dsb_progressColor="@color/discrete_seek_bar"
        app:dsb_scrubberHeight="5dp"
        app:dsb_thumbSize="20dp"
        app:dsb_trackColor="@color/colorMaterialGray300"
        app:dsb_trackHeight="5dp"
        app:layout_constraintEnd_toStartOf="@+id/device_switch"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.appcompat.widget.SwitchCompat
        android:id="@+id/device_switch"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:background="@null"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/touchAwareSeekBar"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

这是我实现的代码:

val layout = ConstraintLayout(context).apply {
        id = View.generateViewId()
        layoutParams = ConstraintLayout.LayoutParams(
            ConstraintLayout.LayoutParams.MATCH_PARENT,
            ConstraintLayout.LayoutParams.WRAP_CONTENT
        )
    }

val dimLevelView = map[DeviceAttributeType.dimLevel]
val onView = map[DeviceAttributeType.on]

layout.addView(dimLevelView)
layout.addView(onOffView)

val set = ConstraintSet()
set.clone(layout)

set.connect(dimLevelView.id, ConstraintSet.START, ConstraintSet.PARENT_ID, ConstraintSet.START)
set.connect(dimLevelView.id, ConstraintSet.END, onView.id, ConstraintSet.START)
set.connect(dimLevelView.id, ConstraintSet.TOP, ConstraintSet.PARENT_ID, ConstraintSet.TOP)
set.centerVertically(dimLevelView.id, ConstraintSet.PARENT_ID)
set.setHorizontalWeight(dimLevelView.id, 1.toFloat())

set.connect(onView.id, ConstraintSet.START, dimLevelView.id, ConstraintSet.END)
set.connect(onView.id, ConstraintSet.END, ConstraintSet.PARENT_ID, ConstraintSet.END)
set.connect(onView.id, ConstraintSet.TOP, ConstraintSet.PARENT_ID, ConstraintSet.TOP)
set.centerVertically(onView.id, ConstraintSet.PARENT_ID)

set.applyTo(layout)

我从 xml 获取 dim 和 onOff View :

<!-- one file to define this -->
<no.beiningbogen.snute.common.view.TouchAwareSeekBar
    android:id="@+id/touchAwareSeekBar"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    app:dsb_indicatorColor="@color/discrete_seek_bar"
    app:dsb_progressColor="@color/discrete_seek_bar"
    app:dsb_scrubberHeight="5dp"
    app:dsb_thumbSize="20dp"
    app:dsb_trackColor="@color/colorMaterialGray300"
    app:dsb_trackHeight="5dp" />

<!-- in another file -->
<androidx.appcompat.widget.SwitchCompat
    android:id="@+id/device_switch"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@null" />

我需要修改什么来强制搜索栏占用开关旁边的剩余空间而不是插入它？

Answer 1

代码几乎是正确的。您没有为 SeekBar 指定开始约束，因此它会与其他所有内容一起消失。尝试以下操作:

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(createLayout())
        supportActionBar?.setTitle("")

    }

    fun createLayout(): ConstraintLayout {

        val layout = ConstraintLayout(this).apply {
            id = View.generateViewId()
            layoutParams = ConstraintLayout.LayoutParams(
                ConstraintLayout.LayoutParams.MATCH_PARENT,
                ConstraintLayout.LayoutParams.WRAP_CONTENT
            )
        }

        val dimLevelView = LayoutInflater.from(this).inflate(R.layout.seekbar_widget, layout, false)
        val onView = LayoutInflater.from(this).inflate(R.layout.switch_widget, layout, false)

        layout.addView(dimLevelView)
        layout.addView(onView)

        val set = ConstraintSet()
        set.clone(layout)

        set.connect(
            dimLevelView.id,
            ConstraintSet.START,
            ConstraintSet.PARENT_ID,
            ConstraintSet.START
        )

        set.connect(
            dimLevelView.id,
            ConstraintSet.START,
            ConstraintSet.PARENT_ID,
            ConstraintSet.START
        )
        set.connect(dimLevelView.id, ConstraintSet.END, onView.id, ConstraintSet.START)
        set.connect(dimLevelView.id, ConstraintSet.TOP, ConstraintSet.PARENT_ID, ConstraintSet.TOP)
        set.centerVertically(dimLevelView.id, ConstraintSet.PARENT_ID)
        set.setHorizontalWeight(dimLevelView.id, 1.toFloat())

        set.connect(onView.id, ConstraintSet.START, dimLevelView.id, ConstraintSet.END)
        set.connect(onView.id, ConstraintSet.END, ConstraintSet.PARENT_ID, ConstraintSet.END)
        set.connect(onView.id, ConstraintSet.TOP, ConstraintSet.PARENT_ID, ConstraintSet.TOP)
        set.centerVertically(onView.id, ConstraintSet.PARENT_ID)

        set.applyTo(layout)
        return layout
    }
}