[英]ConstraintLayout doesn't match parent completely
我有一个包含 ConstraintLayout 的 ScrollView，问题是尽管 ScrollView 确实与屏幕完全匹配，但 Constraint 却不匹配。 我已将两者都设置为 match_parent，但 ConstraintLayout 并没有在底部填充 20% 左右，正如您在图像中看到的那样，底部的蓝线是我的 ConstraintLayout 的最大高度 ，看了很多文章都没有找到答案，不知道是不是和数据绑定有关。 这是我的代码`
<data>
<variable
name="bindingViewModel"
type="com.example.workoutstopwatch.MainActivityViewModel" />
</data>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="10sp"
android:layout_marginLeft="10sp"
android:layout_marginTop="10sp"
android:layout_marginEnd="10dp"
android:layout_marginRight="10dp"
android:text="@string/set_your_work_out_time"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/edit_work_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="8dp"
android:layout_weight="3"
android:hint="@string/_00"
android:inputType="number"
android:maxLength="2"
android:text="@={bindingViewModel.workOutTime}"
android:textSize="80sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView3" />
<Button
android:id="@+id/up_arrow_work"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_gravity="top"
android:layout_marginStart="180dp"
android:layout_marginLeft="180dp"
android:layout_marginTop="4dp"
android:layout_marginEnd="50dp"
android:layout_marginRight="50dp"
android:background="@drawable/arrow_left_foreground"
android:onClick="setDurationType"
android:rotation="90"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="@+id/edit_work_text"
app:layout_constraintTop_toBottomOf="@+id/textView3" />
<TextView
android:id="@+id/work_min_or_secs_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/up_arrow_work"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginTop="52dp"
android:hint="Secs"
android:text="@{bindingViewModel.workMinOrSecsText}"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="@+id/down_arrow_work"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.739"
app:layout_constraintStart_toEndOf="@+id/edit_work_text"
app:layout_constraintTop_toBottomOf="@+id/textView3"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="@+id/down_arrow_work"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_gravity="top"
android:layout_marginStart="180dp"
android:layout_marginLeft="180dp"
android:layout_marginTop="40dp"
android:layout_marginEnd="50dp"
android:layout_marginRight="50dp"
android:background="@drawable/arrow_left_foreground"
android:onClick="setDurationType"
android:rotation="90"
android:rotationX="189"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.983"
app:layout_constraintStart_toEndOf="@+id/edit_work_text"
app:layout_constraintTop_toBottomOf="@+id/up_arrow_work" />
<TextView
android:id="@+id/textView4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="197dp"
android:layout_marginEnd="10dp"
android:layout_marginRight="10dp"
android:layout_marginBottom="163dp"
android:text="@string/set_your_rest_time"
android:textSize="30sp"
app:layout_constraintBottom_toTopOf="@+id/textView5"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.304"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/edit_rest_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="12dp"
android:layout_weight="3"
android:hint="@string/_00"
android:inputType="number"
android:maxLength="2"
android:text="@={bindingViewModel.restTime}"
android:textSize="80sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView4" />
<Button
android:id="@+id/up_arrow_rest"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_gravity="top"
android:layout_marginStart="180dp"
android:layout_marginLeft="180dp"
android:layout_marginTop="4dp"
android:layout_marginEnd="50dp"
android:layout_marginRight="50dp"
android:background="@drawable/arrow_left_foreground"
android:onClick="setDurationType"
android:rotation="90"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="@+id/edit_rest_text"
app:layout_constraintTop_toBottomOf="@+id/textView4" />
<TextView
android:id="@+id/rest_min_or_secs_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/up_arrow_work"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginTop="52dp"
android:hint="Secs"
android:text="@{bindingViewModel.restMinOrSecsText}"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="@+id/down_arrow_rest"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.739"
app:layout_constraintStart_toEndOf="@+id/edit_rest_text"
app:layout_constraintTop_toBottomOf="@+id/textView4"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="@+id/down_arrow_rest"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_gravity="top"
android:layout_marginStart="180dp"
android:layout_marginLeft="180dp"
android:layout_marginTop="40dp"
android:layout_marginEnd="50dp"
android:layout_marginRight="50dp"
android:background="@drawable/arrow_left_foreground"
android:onClick="setDurationType"
android:rotation="90"
android:rotationX="189"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.983"
app:layout_constraintStart_toEndOf="@+id/edit_rest_text"
app:layout_constraintTop_toBottomOf="@+id/up_arrow_rest" />
<TextView
android:id="@+id/textView5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginEnd="10dp"
android:layout_marginRight="10dp"
android:layout_marginBottom="168dp"
android:text="@string/set_your_number_of_reps"
android:textSize="30sp"
app:layout_constraintBottom_toTopOf="@+id/start_text"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.611"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView4" />
<EditText
android:id="@+id/edit_reps_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="16dp"
android:layout_weight="3"
android:hint="@string/_00"
android:inputType="number"
android:maxLength="2"
android:text="@={bindingViewModel.numberOfReps}"
android:textSize="80sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView5" />
<TextView
android:id="@+id/start_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:gravity="center"
android:onClick="startTraining"
android:text="START!"
android:textColor="#FF1800"
android:textSize="60sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
`
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