android studio Missing Constraints in ConstraintLayout

最新推荐文章于 2025-03-09 10:10:52 发布

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最新推荐文章于 2025-03-09 10:10:52 发布

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本文讲解了在设计视图布局时遇到的问题，即视图在运行时跳转到(0,0)位置，除非添加约束。文章详细介绍了如何通过为小部件添加水平和垂直约束来修复此问题，确保在设备上显示的位置与编辑器中看到的一致。

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This view is not constrained. It only has designtime positions, so it will jump to (0,0) at runtime unless you add the constraints The layout editor allows you to place widgets anywhere on the canvas, and it records the current position with designtime attributes (such as layout_editor_absoluteX). These attributes are not applied at runtime, so if you push your layout on a device, the widgets may appear in a different location than shown in the editor. To fix this, make sure a widget has both horizontal and vertical constraints by dragging from the edge connections. Issue id: MissingConstraints

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TextView"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
/>