Android的滚动性能很差
在我的android活动中,我的滚动性能非常差。 ScrollView包含许多带有图像按钮的线性布局。图像的权重低于50KB。我怎样才能解决它 活动布局:Android的滚动性能很差,android,performance,scrollview,Android,Performance,Scrollview,在我的android活动中,我的滚动性能非常差。 ScrollView包含许多带有图像按钮的线性布局。图像的权重低于50KB。我怎样才能解决它 活动布局: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/to
<RelativeLayout 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"
tools:context=".categories.AllSoundsActivity"
android:orientation="vertical"
android:background="@drawable/main_menu"
android:layout_alignParentEnd="false"
app:layout_scrollFlags="scroll"
android:clipToPadding="false"
android:clipChildren="false"
android:clickable="false"
android:layout_alignParentBottom="false"
android:layout_alignParentTop="false"
android:layout_alignWithParentIfMissing="false"
android:layout_centerVertical="false"
android:soundEffectsEnabled="true"
android:verticalScrollbarPosition="right"
android:visibility="visible"
android:layout_alignParentLeft="false"
android:layout_alignParentRight="false"
android:layout_alignParentStart="false"
android:fadeScrollbars="true"
android:baselineAligned="false"
android:addStatesFromChildren="false">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true">
<!-- This is the 'faux' ToolBar I've been telling you about. This is the part that will be overlaid by the content view below. -->
<FrameLayout
android:id="@+id/v_toolbar_extension"
android:layout_width="match_parent"
android:layout_height="78dp"
android:layout_below="@+id/tb_toolbar"
android:elevation="0dp">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_gravity="top"
android:layout_height="match_parent"
android:minHeight="0dp"
android:gravity="right"
android:background="@drawable/toolbar_image">
<ImageButton
android:src="@drawable/buton_favourite_image"
android:layout_width="55dp"
android:layout_height="53dp"
android:layout_gravity="right"
android:layout_marginRight="8dp"
android:background="?selectableItemBackground"
android:id="@+id/favouriteButton"
android:scaleType="centerInside"
android:elevation="24dp"
android:visibility="visible" />
<ImageButton
android:src="@drawable/main_menu_icon_image"
android:layout_width="51dp"
android:layout_height="61dp"
android:layout_gravity="right"
android:layout_marginRight="8dp"
android:background="?selectableItemBackground"
android:id="@+id/mainMenuButton"
android:scaleType="centerInside"
android:elevation="24dp"
android:visibility="visible" />
</android.support.v7.widget.Toolbar>
</FrameLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/scrollview">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:drawingCacheQuality="auto"
android:alwaysDrawnWithCache="true"
android:persistentDrawingCache="all">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button2"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button2"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button2"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button3"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button3"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button3"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button4"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button4"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button4"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button5"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button5"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button5"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button6"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button6"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button6"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button7"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button7"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button7"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button8"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button8"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button8"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:contextClickable="false"
android:gravity="center"
android:weightSum="1">
<ImageButton
android:src="@drawable/share_button"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/share_button9"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginLeft="30dp"
android:layout_marginRight="8dp"
android:layout_weight="0.18"/>
<ImageButton
android:src="@drawable/example_sound"
android:layout_width="276dp"
android:layout_height="130dp"
android:background="?selectableItemBackground"
android:id="@+id/all_sounds_button9"
android:scaleType="centerInside"
android:cropToPadding="false"
android:layout_weight="0.44" />
<ImageButton
android:src="@drawable/unliked"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="?selectableItemBackground"
android:id="@+id/unliked_button9"
android:scaleType="centerInside"
android:visibility="visible"
android:layout_marginRight="30dp"
android:layout_marginLeft="8dp"
android:layout_weight="0.18" />
</LinearLayout>
</LinearLayout>
</ScrollView>
</LinearLayout>
问题是许多嵌套的线性布局必须反复绘制。看看Android的hierarchyviewer,你就会明白我的意思了
我建议您做的是去掉ScrollView,用ListView替换它。通过这样做,Android将能够使用图像按钮重复使用您的线性布局,而不必每次都重新绘制,从而产生更平滑的滚动。我认为这与您的布局无关。更有可能是在繁忙的UI线程中。请显示您的代码。我的活动代码是完全默认的,就像AndroidStudio中新生成的活动一样,除了默认代码之外没有其他代码。我会建议使用recyclerViews,因为在性能方面它会更好。。。但是,如果显示的视图实际上不是一个显示相同布局的项目列表,该怎么办?适配器中的一些技巧有助于使recyclerView膨胀,但你不会得到这种具有性能魔力的回收功能。但是我可以将imagebuttons添加到recyclerView吗?正如@AnixPasBesoin所说,我同意使用recyclerView,我没有提到它,因为在我看来,对于刚接触安卓的人来说,列表视图的设置还是比较容易的。另外,yes ImageButtons可用于RecyclerViews。问题在于高分辨率背景图像。这是我的错,因为我把它放到了drawable文件夹,而不是mipmap文件夹。现在我更改了目录,效果很好,但我将使用listview代替许多嵌套的LinearLayout。谢谢你的帮助:)