所以我的初始布局是：
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/holder"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/margin_padding_size_small">
<com.google.android.material.button.MaterialButton
android:id="@+id/btn_cod"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingStart="@dimen/margin_padding_size_small"
android:paddingEnd="@dimen/margin_padding_size_small"
android:text="@string/cash_on_delivery_label"
app:cornerRadius="@dimen/card_corner_radius_medium"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/btn_card"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="@string/cash_on_delivery_label" />
<com.google.android.material.button.MaterialButton
android:id="@+id/btn_card"
style="@style/Widget.MaterialComponents.Button.OutlinedButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingStart="@dimen/margin_padding_size_small"
android:paddingEnd="@dimen/margin_padding_size_small"
android:text="@string/card_label"
app:cornerRadius="@dimen/card_corner_radius_medium"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/btn_qr_scan"
app:layout_constraintStart_toEndOf="@+id/btn_cod"
app:strokeColor="@color/colorAccent"
tools:text="@string/card_label" />
<com.google.android.material.button.MaterialButton
android:id="@+id/btn_qr_scan"
style="@style/Widget.MaterialComponents.Button.OutlinedButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingStart="@dimen/margin_padding_size_small"
android:paddingEnd="@dimen/margin_padding_size_small"
android:text="@string/qr_scan_label"
app:cornerRadius="@dimen/card_corner_radius_medium"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/btn_card"
app:strokeColor="@color/colorAccent"
tools:text="@string/qr_scan_label" />
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
并且我很早就做出了一个假设，即我将根据从服务器收到的响应来为按钮设置style属性。但是Android Framework没有setStyle()方法。
所以我不得不寻找其他方法来做到这一点。我搜索并找到了[[Paris库，该库确实允许我们设置样式，但当前不适用于MaterialComponents。
我尝试使用MaterialButtonToggleGroup，但包括依赖项完全使DataBinding混乱，并在应用程序的其他模块中显示错误。我当前的方法是动态创建所有三个按钮，并将它们填充在ConstraintLayout中，这将是我的根布局。
我将如何用约束和链条以编程方式填充这三个按钮。
我一直在尝试：
val constraintSet = ConstraintSet()
// constraintSet.clone(holder) // do I need this?
//holder is the id of the constraint layout from xml
val codButton = MaterialButton(this, null, R.attr.materialButtonStyle)
codButton.text = resources.getString(R.string.cash_on_delivery_label)
codButton.id = generateViewId()
codButton.setCornerRadiusResource(R.dimen.card_corner_radius_medium)
holder.addView(codButton)
val cardButton = MaterialButton(this, null, R.attr.borderlessButtonStyle)
cardButton.text = resources.getString(R.string.card_label)
cardButton.id = generateViewId()
cardButton.setCornerRadiusResource(R.dimen.card_corner_radius_medium)
cardButton.setStrokeColorResource(R.color.colorAccent)
holder.addView(cardButton)
val qrButton = MaterialButton(this, null, R.attr.borderlessButtonStyle)
qrButton.text = resources.getString(R.string.qr_scan_label)
qrButton.id = generateViewId()
qrButton.setCornerRadiusResource(R.dimen.card_corner_radius_medium)
qrButton.setStrokeColorResource(R.color.colorAccent)
holder.addView(qrButton)
//constraintSet.connect() calls?
constraintSet.applyTo(holder)
请告诉我实现这一目标的最佳方法。要求是，对于服务器的任何响应，应将三个按钮中的两个按钮设置为物料组件的轮廓按钮，并将一个按钮设置为物料组件的常规按钮。[另一个问题是：我不能使用
R.attr.materialButtonOutlinedStyle（未解决的符号），但是我可以使用R.attr.materialButtonStyle；为什么会这样？
创建样式：
<!-- Outline Button Style -->
<style name="ThemeOverlay.MyApp.OutlinedButton" parent="">
<item name="materialButtonStyle">@style/Widget.MaterialComponents.Button.OutlinedButton</item>
</style>
动态生成三个按钮集。使用ContextThemeWrapper将以上样式应用于按钮。并设置约束以水平链接它们。 val constraintSet = ConstraintSet()
//construct COD button
val codButton = MaterialButton(this, null, R.attr.materialButtonStyle)
codButton.text = resources.getString(R.string.cash_on_delivery_label)
codButton.id = generateViewId()
codButton.setCornerRadiusResource(R.dimen.card_corner_radius_medium)
holder.addView(codButton)
//construct card button
val cardButton =
MaterialButton(ContextThemeWrapper(this, R.style.ThemeOverlay_MyApp_OutlinedButton))
cardButton.text = resources.getString(R.string.card_label)
cardButton.id = generateViewId()
cardButton.isClickable = false
cardButton.setCornerRadiusResource(R.dimen.card_corner_radius_medium)
cardButton.setStrokeColorResource(R.color.colorAccent)
holder.addView(cardButton)
//construct qr button
val qrButton =
MaterialButton(ContextThemeWrapper(this, R.style.ThemeOverlay_MyApp_OutlinedButton))
qrButton.text = resources.getString(R.string.qr_scan_label)
qrButton.id = generateViewId()
qrButton.isClickable = false
qrButton.setCornerRadiusResource(R.dimen.card_corner_radius_medium)
qrButton.setStrokeColorResource(R.color.colorAccent)
holder.addView(qrButton)
constraintSet.clone(holder)
// constraints for the cod button
constraintSet.connect(
codButton.id,
ConstraintSet.START,
ConstraintSet.PARENT_ID,
ConstraintSet.START
)
constraintSet.connect(codButton.id, ConstraintSet.END, cardButton.id, ConstraintSet.START)
// constraints for the card button
constraintSet.connect(cardButton.id, ConstraintSet.START, codButton.id, ConstraintSet.END)
constraintSet.connect(cardButton.id, ConstraintSet.END, qrButton.id, ConstraintSet.START)
// constraints for the qr scan
constraintSet.connect(qrButton.id, ConstraintSet.START, cardButton.id, ConstraintSet.END)
constraintSet.connect(
qrButton.id,
ConstraintSet.END,
ConstraintSet.PARENT_ID,
ConstraintSet.END
)
constraintSet.applyTo(holder)