android - 在 Fragment 中选择微调器项目时复选框消失
问题描述
我有一个片段,其中有一个微调器和复选框。
布局文件need_help_fragment_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="@color/all_fragment_background"
android:clickable="true"
android:focusable="true">
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/parent_top"
app:layout_constraintGuide_percent="0"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/parent_bottom"
app:layout_constraintGuide_percent="1"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/parent_left"
android:orientation="vertical"
app:layout_constraintGuide_percent="0"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/parent_right"
android:orientation="vertical"
app:layout_constraintGuide_percent="1"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/top_title_bottom"
app:layout_constraintGuide_percent=".25"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@+id/top_title_bottom"
app:layout_constraintEnd_toStartOf="@+id/parent_right"
app:layout_constraintStart_toEndOf="@+id/parent_left"
app:layout_constraintTop_toBottomOf="@+id/parent_top">
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/text_view_top"
app:layout_constraintGuide_percent="0"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/text_view_bottom"
app:layout_constraintGuide_percent="1"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/text_view_left"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.07"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/text_view_right"
android:orientation="vertical"
app:layout_constraintGuide_percent=".93"/>
<TextView
android:text="@string/need_help_header_text"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:id="@+id/title_header_text_view"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@+id/text_view_top"
app:layout_constraintBottom_toTopOf="@+id/text_view_bottom"
app:layout_constraintStart_toEndOf="@+id/text_view_left"
app:layout_constraintEnd_toStartOf="@+id/text_view_right"
android:textColor="@color/all_text_color"
android:textSize="18sp"
android:gravity="center">
</TextView>
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/mid_content_bottom_guide"
app:layout_constraintGuide_percent=".8"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@+id/top_title_bottom"
app:layout_constraintBottom_toTopOf="@+id/mid_content_bottom_guide"
app:layout_constraintStart_toEndOf="@+id/parent_left"
app:layout_constraintEnd_toStartOf="@+id/parent_right">
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/mid_content_top"
app:layout_constraintGuide_percent="0"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/mid_content_bottom"
app:layout_constraintGuide_percent="1"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/mid_content_left"
android:orientation="vertical"
app:layout_constraintGuide_percent=".07"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/mid_content_right"
android:orientation="vertical"
app:layout_constraintGuide_percent=".93"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/spinner_bottom"
app:layout_constraintGuide_percent=".2"
android:orientation="horizontal"/>
<androidx.appcompat.widget.AppCompatSpinner
android:background="@null"
app:layout_constraintTop_toBottomOf="@+id/mid_content_top"
app:layout_constraintBottom_toTopOf="@+id/spinner_bottom"
app:layout_constraintStart_toEndOf="@+id/mid_content_left"
app:layout_constraintEnd_toStartOf="@+id/mid_content_right"
android:id="@+id/spinner_view"
android:layout_width="0dp"
android:layout_height="0dp"
android:gravity="center_horizontal | bottom"
android:text="3 Seconds"
android:textColor="@color/all_text_color"
android:textSize="22sp" />
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/checkbox_top"
app:layout_constraintGuide_percent=".4"
android:orientation="horizontal"/>
<androidx.constraintlayout.widget.Guideline
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/checkbox_bottom"
app:layout_constraintGuide_percent=".6"
android:orientation="horizontal"/>
<CheckBox
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Remove timing, Auto Mode"
app:layout_constraintTop_toBottomOf="@+id/checkbox_top"
app:layout_constraintBottom_toTopOf="@+id/checkbox_bottom"
app:layout_constraintStart_toEndOf="@+id/mid_content_left"
app:layout_constraintEnd_toStartOf="@+id/mid_content_right"
android:layoutDirection="rtl"
android:gravity="center_vertical"
android:paddingLeft="10dp"
android:textSize="18sp"
android:textColor="@color/all_text_color"
android:id="@+id/remove_timing_auto_mode_check_box"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
片段中的代码:
class NeedHelpFragment: Fragment(), View.OnClickListener {
lateinit var homeActivity : MainActivity
var check_box: CheckBox? = null
var spinner_view: Spinner? = null
lateinit var timeSpinnerList: ArrayList<String>
lateinit var timeSpinnerAdapter: ArrayAdapter<String>
override fun onAttach(context: Context) {
super.onAttach(context)
if(context is MainActivity)
homeActivity = context
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
var v : View = inflater.inflate(R.layout.need_help_fragment_layout, container, false)
check_box = v.findViewById<CheckBox>(R.id.check_box)
timeSpinnerList = ArrayList()
for(i in 0..10)
timeSpinnerList.add("$i seconds")
timeSpinnerAdapter = ArrayAdapter(homeActivity, android.R.layout.simple_spinner_dropdown_item, timeSpinnerList)
spinner_view = v.findViewById<Spinner>(R.id.spinner_view)
spinner_view!!.adapter = timeSpinnerAdapter
return v
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
override fun onClick(view: View?) {
when(view!!.id){
}
}
}
颜色代码:
<color name="colorPrimary">#6200EE</color>
<color name="colorPrimaryDark">#3700B3</color>
<color name="colorAccent">#03DAC5</color>
<color name="all_text_color">#6F6F6F</color>
<color name="all_fragment_background">#F8F8F8</color>
当没有选择任何东西时很好:
当从微调器中选择一个项目时,复选框会消失:
布局文件中没有其他内容。只是复选框和微调器的约束布局和指南。微调器和复选框在片段的 onCreateView 中初始化。当我从微调器中选择任何项目时,复选框会消失。请帮忙。
解决方案
我认为问题在于您对constraintLayout
以下选项的设置值:
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/spinner_view"
app:layout_constraintBottom_toBottomOf="parent"
我认为在某些情况下这是错误的。
然后举个简单的例子,我删除了指南并解决了它。
您可以使用此方法并添加您的指南。
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/all_fragment_background"
android:clickable="true"
android:focusable="true">
<TextView
android:id="@+id/title_header_text_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="120dp"
android:gravity="center"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:text="HEAD"
android:textColor="@color/all_text_color"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatSpinner
android:id="@+id/spinner_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:background="@null"
android:gravity="center_horizontal|bottom"
android:text="3 Seconds"
android:textColor="@color/all_text_color"
android:textSize="22sp"
app:layout_constraintBottom_toTopOf="@+id/remove_timing_auto_mode_check_box"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/title_header_text_view" />
<CheckBox
android:id="@+id/remove_timing_auto_mode_check_box"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layoutDirection="rtl"
android:paddingLeft="10dp"
android:text="Remove timing, Auto Mode"
android:textColor="@color/all_text_color"
android:textSize="18sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/spinner_view" />
</androidx.constraintlayout.widget.ConstraintLayout>
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