Question

无论我在Constraintset.connect中写什么来改变位置，它总是保持原样（我希望它从屏幕外移动到屏幕左侧），此时视图是完全在屏幕内部，只缺少左边约束）。谢谢。

ListViewItem的：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#202020">

    <ImageView
        android:id="@+id/listItemImageView"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginEnd="40dp"
        android:layout_marginRight="16dp"
        android:layout_marginTop="16dp"
        android:paddingBottom="16dp"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@mipmap/ic_launcher" />

    <TextView
        android:id="@+id/listItemTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/listItemImageView"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="17dp"
        android:layout_marginRight="17dp"
        android:layout_marginTop="8dp"
        android:layout_toLeftOf="@+id/listItemImageView"
        android:layout_toStartOf="@+id/listItemImageView"
        android:fontFamily="casual"
        android:text="This Text will change"
        android:textAlignment="viewStart"
        android:textColor="@android:color/holo_green_dark"
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="@+id/listItemImageView"
        app:layout_constraintRight_toLeftOf="@+id/listItemImageView"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.5" />
</android.support.constraint.ConstraintLayout>

主要活动文件

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    android:id="@+id/urlayout"
    tools:context="com.example.me.gesturelaunchertest.MainActivity">
    <!-- Ab fadeduration sachen für I usw. -->
    <android.gesture.GestureOverlayView
        android:id="@+id/gesOverlay"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_gravity="center_horizontal"

        android:eventsInterceptionEnabled="true"
        android:fadeDuration="300"
        android:gestureStrokeAngleThreshold="0"
        android:gestureStrokeLengthThreshold="300.0"
        android:gestureStrokeSquarenessThreshold="0"
        android:gestureColor="@android:color/white"
        android:gestureStrokeWidth="40.0"
        android:uncertainGestureColor="@android:color/darker_gray"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </android.gesture.GestureOverlayView>

    <ListView
        android:id="@+id/applistview"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="right"
        android:layout_marginBottom="8dp"
        android:layout_marginTop="8dp"
        android:background="@android:color/transparent"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0"
        android:layout_marginRight="113dp"
        app:layout_constraintRight_toRightOf="parent" />


</android.support.constraint.ConstraintLayout>

MainActivity：

            TransitionManager.beginDelayedTransition(constraintLayout);
            constraintSet=new ConstraintSet();

            constraintSet.clone(constraintLayout);

            constraintSet.connect(applistview.getId(), ConstraintSet.LEFT, constraintLayout.getId(), ConstraintSet.RIGHT, 110);

            constraintSet.applyTo(constraintLayout);

Answer 1

ConstraintSet.LEFT和ConstraintSet.RIGHT似乎无法解决问题。请参阅错误跟踪器上的this issue。

尝试改为使用ConstraintSet.START和ConstraintSet.END：

constraintSet.connect(applistview.getId(), ConstraintSet.START,
        constraintLayout.getId(), ConstraintSet.END, 110);

我希望这会有所帮助。

ConstraintSet：Listview无法正常移动

1 个答案: