我在移动应用程序中使用了一些scrolling textViews,但是最近我注意到text启动scrolling时会有一些滞后。为什么会这样?我有两个使用相同代码的不同fragments,但是scrolling textViews不在另一个上“滞后”。我正在尝试找出问题所在,但找不到。欢迎任何帮助!

layout.xml文件:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    android:background="@drawable/card_view_bg"
    tools:layout_editor_absoluteY="25dp">

<ImageView
    android:id="@+id/cardArtImageView"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_weight="1"
    android:adjustViewBounds="true"
    android:scaleType="fitCenter"
    app:layout_constraintBottom_toTopOf="@+id/cardDetailsImageView"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<!--
<ImageView
    android:id="@+id/cardDetailsImageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:adjustViewBounds="true"
    android:cropToPadding="false"
    android:scaleType="fitXY"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:srcCompat="@drawable/card_details_box" /> -->

<!-- Implement scrolling text
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:singleLine="true"
        android:scrollHorizontally="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
 -->

<!-- passive skill desc
<TextView
    android:id="@+id/passiveSkillDesc"
    android:layout_width="395dp"
    android:layout_height="33dp"
    android:fontFamily="monospace"
    android:textAlignment="center"
    android:textColor="@android:color/black"
    android:textSize="13sp"
    android:textStyle="italic"
    android:visibility="invisible"
    tools:layout_editor_absoluteX="8dp"
    tools:layout_editor_absoluteY="602dp" />
    -->

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="225dp"
    android:background="@drawable/card_details_closed">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/HP"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_alignParentTop="true"
            android:layout_marginStart="37dp"
            android:layout_weight="1"
            android:text="0000"
            android:textColor="@color/white"
            android:textSize="16sp"
            android:textStyle="bold"
            tools:text="0000" />

        <TextView
            android:id="@+id/ATT"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_marginStart="78dp"
            android:layout_toEndOf="@+id/HP"
            android:layout_weight="1"
            android:text="0000"
            android:textColor="@color/white"
            android:textSize="16sp"
            android:textStyle="bold"
            tools:text="0000" />

        <TextView
            android:id="@+id/DEF"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_alignParentTop="true"
            android:layout_marginEnd="46dp"
            android:layout_weight="1"
            android:text="0000"
            android:textColor="@color/white"
            android:textSize="16sp"
            android:textStyle="bold"
            tools:text="0000" />

    </RelativeLayout>

    <TextView
        android:id="@+id/leaderSkillDesc"
        android:layout_width="250dp"
        android:layout_height="15dp"
        android:layout_above="@+id/superAttackTitle"
        android:layout_alignParentEnd="true"
        android:layout_marginBottom="14dp"
        android:layout_marginEnd="35dp"
        android:ellipsize="marquee"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:fontFamily="monospace"
        android:marqueeRepeatLimit="marquee_forever"
        android:scrollHorizontally="true"
        android:singleLine="true"
        android:textAlignment="viewStart"
        android:textColor="@color/white"
        android:textSize="13sp"
        android:textStyle="italic"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.496"
        app:layout_constraintVertical_bias="0.626" />

    <TextView
        android:id="@+id/superAttackTitle"
        android:layout_width="250dp"
        android:layout_height="15dp"
        android:layout_above="@+id/superAttackDesc"
        android:layout_alignStart="@+id/superAttackDesc"
        android:ellipsize="marquee"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:fontFamily="monospace"
        android:marqueeRepeatLimit="marquee_forever"
        android:scrollHorizontally="true"
        android:singleLine="true"
        android:textAlignment="viewStart"
        android:textColor="@android:color/holo_blue_light"
        android:textSize="12sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toTopOf="@+id/superAttackDesc"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <TextView
        android:id="@+id/superAttackDesc"
        android:layout_width="255dp"
        android:layout_height="15dp"
        android:layout_alignEnd="@+id/leaderSkillDesc"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="73dp"
        android:ellipsize="marquee"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:fontFamily="monospace"
        android:marqueeRepeatLimit="marquee_forever"
        android:scrollHorizontally="true"
        android:singleLine="true"
        android:textAlignment="viewStart"
        android:textColor="@android:color/white"
        android:textSize="13sp"
        android:textStyle="italic"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

</RelativeLayout>

<!-- passive skill title
<TextView
    android:id="@+id/passiveSkillTitle"
    android:layout_width="189dp"
    android:layout_height="30dp"
    android:fontFamily="monospace"
    android:textAlignment="viewStart"
    android:textColor="@color/cardDetailsTextColor"
    android:textSize="12sp"
    android:visibility="invisible"
    tools:layout_editor_absoluteX="207dp"
    tools:layout_editor_absoluteY="543dp" />
    -->

</LinearLayout>


更新
当我将手机分辨率设为4K(s8)时,这种延迟实际上也发生在第二个片段中!

最佳答案

您可能有一个问题

android:layout_weight="1"


here所述,设置权重对性能不利。


  嵌套权重不利于性能,因为:
  
  
    布局权重要求对小部件进行两次测量。当具有非零权重的LinearLayout嵌套在另一个内部时
    权重非零的LinearLayout,然后是测量次数
    呈指数增长
  


但是,此后事情发展了,谷歌引入了一种新的布局:ConstraintLayout。我强烈建议您改用它:ConstraintLayout

10-08 03:43