this view is not constrainted......

this view is not constrainted

解决方案：

<EditText
        android:id="@+id/editText"
        android:layout_marginLeft="4dp"
        android:layout_marginTop="56dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

添加以下一个属性：

android:layout_marginLeft

android:layout_marginTop

app:layout_constraintStart_toStartOf

app:layout_constraintTop_toTopOf