修改图像分辨率和大小以适应卡片视图属性

Question

我的 android 应用程序有一条错误消息，它使用卡片视图和回收视图，我认为分配图像的大小和分辨率有问题，这是错误消息：

D/skia: --- allocation failed for scaled bitmap D/AndroidRuntime: Shutting down VM W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41775898) E/AndroidRuntime: FATAL EXCEPTION: main java.lang.OutOfMemoryError at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:586) at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:439) at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:832) at android.content.res.Resources.loadDrawable(Resources.java:2988) at android.content.res.Resources.getDrawable(Resources.java:1558) at android.support.v7.widget.ResourcesWrapper.getDrawable(ResourcesWrapper.java:128) at android.support.v7.widget.TintResources.getDrawable(TintResources.java:45) at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:374) at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:202) at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:190) at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100) at android.support.v7.widget.AppCompatImageHelper.setImageResource(AppCompatImageHelper.java:73) at android.support.v7.widget.AppCompatImageView.setImageResource(AppCompatImageView.java:81) at pioneers.safwat.animals.RecyclerAdapterbirdse.onBindViewHolder(RecyclerAdapterbirdse.java:71) at pioneers.safwat.animals.RecyclerAdapterbirdse.onBindViewHolder(RecyclerAdapterbirdse.java:11) at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6310) at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6343) at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5289) at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5552) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5394) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5390) at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2149) at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1533) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1496) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:593) at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3537) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3266) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3798) at android.view.View.layout(View.java:15213) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1167) at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:852) at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:871) at android.view.View.layout(View.java:15213) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:15213) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.support.v7.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:437) at android.view.View.layout(View.java:15213) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:15213) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531) at android.widget.LinearLayout.onLayout(LinearLayout.java:1440) at android.view.View.layout(View.java:15213) at android.view.ViewGroup.layout(ViewGroup.java:4793) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:15213) at android.vie I/Process: Sending signal. PID: 30359 SIG: 9 Application terminated.

这是我的卡片布局XML文件：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/card_view"
    android:layout_margin="5dp"
    card_view:cardBackgroundColor="#81C784"
    card_view:cardCornerRadius="12dp"
    card_view:cardElevation="3dp"
    card_view:contentPadding="4dp"
    android:foreground="?selectableItemBackground"
    android:clickable="true" >
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="16dp" >

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/item_image"
            android:scaleType="fitXY"
            android:adjustViewBounds="true"
            android:layout_alignParentStart="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:layout_alignParentRight="true"/>

        <TextView
            android:layout_marginTop="8dp"
            android:id="@+id/item_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:gravity="center"
            android:textSize="16pt"
            android:paddingLeft="10dp"
            android:layout_below="@+id/item_image"
            />


    </RelativeLayout>

</android.support.v7.widget.CardView>

Answer 1

您可能正在内存中加载一个大位图，它发出内存不足异常。

为避免 java.lang.OutOfMemory 异常，请在解码前检查位图的尺寸。

您必须执行以下步骤来处理它 -

在内存中加载完整图像的估计内存使用量。
您愿意承诺用于加载此图像的内存量鉴于您的应用程序的任何其他内存要求。
目标 ImageView 的尺寸或图像所在的 UI 组件待载入。
当前设备的屏幕尺寸和密度。

从这里找到如何执行上述步骤 - https://developer.android.com/topic/performance/graphics/load-bitmap.html
或者你使用一个图像加载库来为你做这一切。
有很多可用的库：Glide, Picasso, Fresco, UIL

修改图像分辨率和大小以适应卡片视图属性

Modifying Images resolution and size to fit card view properiries

android

android-cardview