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社区首页 >问答首页 >如何在OutOfMemoryError中加载位图时修复错误BaseAdapter

问如何在OutOfMemoryError中加载位图时修复错误BaseAdapter
EN

Stack Overflow用户
提问于 2013-11-10 22:09:09
回答 2查看 674关注 0票数 1

首先，我为我糟糕的英语道歉。

我有一个Android应用程序，有一个活动的产品目录。产品列表和图片中的数据是在一个单独的例程中下载的。该活动的唯一责任就是加载数据产品和它们各自的照片。

为了演示数据是创建的，一个listview和一个从BaseAdapter继承的自定义适配器类遵循代码；

一些考虑。

  • 源图像的最大大小为500像素、高度或宽度。
  • 最大文件大小平均为45 kb。
  • 纪录的数目在1200至2000年间。

layout/catalogo.xml

代码语言：javascript
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <GridView
        android:id="@+id/gv_catalogo_gridprods"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:horizontalSpacing="5dp"
        android:numColumns="3"
        android:verticalSpacing="5dp"
        tools:listitem="@layout/catalogo_item" >
    </GridView>

</LinearLayout>

layout/catalogo.xml

代码语言：javascript
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/fundo_imagem_catalogo"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:baselineAligned="false" >

        <LinearLayout
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/textView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_codigo"
                android:textSize="12sp" />

            <TextView
                android:id="@+id/lb_catalogoitem_codigo"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_000"
                android:textStyle="bold" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/textView3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_descricao"
                android:textSize="12sp" />

            <TextView
                android:id="@+id/lb_catalogoitem_descricao"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/label_descricao"
                android:textStyle="bold" />
        </LinearLayout>
    </LinearLayout>

    <ImageView
        android:id="@+id/iv_catalogoitem_imagem"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_gravity="center"
        android:baselineAligned="false"
        android:contentDescription="Imagem Produto"
        android:src="@drawable/icone_android" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:baselineAligned="false" >

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/textView5"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_codbarras"
                android:textSize="12sp" />

            <TextView
                android:id="@+id/lb_catalogoitem_codbarras"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_789000000"
                android:textStyle="bold" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/textView7"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_embalagem"
                android:textSize="12sp" />

            <TextView
                android:id="@+id/lb_catalogoitem_emb"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_cx012"
                android:textStyle="bold" />

        </LinearLayout>
    </LinearLayout>

</LinearLayout>

约会者到GridView

代码语言：javascript
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public class AdapterImagensCatalogo extends BaseAdapter {

    Context contexto;
    List<ItemCatalogo> catalogo;
    BitmapFactory.Options optBitMap;

    public AdapterImagensCatalogo(Context contexto, List<ItemCatalogo> catalogo) {
        this.contexto = contexto;
        this.catalogo = catalogo;
        this.optBitMap = new BitmapFactory.Options();
        this.optBitMap.inSampleSize = 10;

    }

    @Override
    public int getCount() {
        return catalogo.size();
    }

    @Override
    public Object getItem(int position) {
        return catalogo.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        convertView = LayoutInflater.from(contexto).inflate(R.layout.catalogo_item, null);
        TextView tv = (TextView) convertView.findViewById(R.id.lb_catalogoitem_codigo);
        tv.setText(catalogo.get(position).getProduto());

        tv = (TextView) convertView.findViewById(R.id.lb_catalogoitem_descricao);
        tv.setText(catalogo.get(position).getDescricao());

        tv = (TextView) convertView.findViewById(R.id.lb_catalogoitem_codbarras);
        tv.setText(catalogo.get(position).getCodigoBarras());

        tv = (TextView) convertView.findViewById(R.id.lb_catalogoitem_emb);
        tv.setText(catalogo.get(position).getEmbalagem());

        ImageView imgV = (ImageView) convertView.findViewById(R.id.iv_catalogoitem_imagem);
        imgV.setImageBitmap(getMiniaturaImagem(catalogo.get(position).getPathArquivo()));

        return convertView;
    }


    private Bitmap getMiniaturaImagem(String path){
        return BitmapFactory.decodeFile(path, optBitMap);
    }


}

当用户浏览图片列表时，问题就会发生。尤其是当他做导航这么快的时候。

这是LogCat错误。

代码语言：javascript
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    11-10 21:17:06.781: E/MessageQueue-JNI(2526): java.lang.OutOfMemoryError
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:651)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:407)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at com.cleber.myapp.adapter.AdapterImagensCatalogo.getMiniaturaImagem(AdapterImagensCatalogo.java:69)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at com.cleber.myapp.adapter.AdapterImagensCatalogo.getView(AdapterImagensCatalogo.java:62)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.AbsListView.obtainView(AbsListView.java:2461)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.GridView.makeAndAddView(GridView.java:1331)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.GridView.makeRow(GridView.java:331)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.GridView.fillDown(GridView.java:283)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.GridView.fillGap(GridView.java:243)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5549)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:3429)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.widget.AbsListView.onTouchEvent(AbsListView.java:3921)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.View.dispatchTouchEvent(View.java:7392)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2229)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1964)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2177)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1482)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.app.Activity.dispatchTouchEvent(Activity.java:2483)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2125)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.View.dispatchPointerEvent(View.java:7577)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3376)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3308)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4421)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4399)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4505)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:178)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.os.MessageQueue.nativePollOnce(Native Method)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.os.MessageQueue.next(MessageQueue.java:125)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.os.Looper.loop(Looper.java:124)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at android.app.ActivityThread.main(ActivityThread.java:4949)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at java.lang.reflect.Method.invokeNative(Native Method)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at java.lang.reflect.Method.invoke(Method.java:511)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1043)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:810)
11-10 21:17:06.781: E/MessageQueue-JNI(2526):   at dalvik.system.NativeStart.main(Native Method)
11-10 21:17:06.781: D/AndroidRuntime(2526): Shutting down VM
11-10 21:17:06.781: W/dalvikvm(2526): threadid=1: thread exiting with uncaught exception (group=0x41a892a0)
11-10 21:17:06.781: E/AndroidRuntime(2526): FATAL EXCEPTION: main
11-10 21:17:06.781: E/AndroidRuntime(2526): java.lang.OutOfMemoryError
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:651)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:407)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at com.cleber.myapp.adapter.AdapterImagensCatalogo.getMiniaturaImagem(AdapterImagensCatalogo.java:69)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at com.cleber.myapp.adapter.AdapterImagensCatalogo.getView(AdapterImagensCatalogo.java:62)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.AbsListView.obtainView(AbsListView.java:2461)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.GridView.makeAndAddView(GridView.java:1331)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.GridView.makeRow(GridView.java:331)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.GridView.fillDown(GridView.java:283)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.GridView.fillGap(GridView.java:243)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5549)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:3429)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.widget.AbsListView.onTouchEvent(AbsListView.java:3921)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.View.dispatchTouchEvent(View.java:7392)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2229)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1964)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2235)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1978)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2177)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1482)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.app.Activity.dispatchTouchEvent(Activity.java:2483)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2125)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.View.dispatchPointerEvent(View.java:7577)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3376)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3308)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4421)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4399)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4505)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:178)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.os.MessageQueue.nativePollOnce(Native Method)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.os.MessageQueue.next(MessageQueue.java:125)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.os.Looper.loop(Looper.java:124)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at android.app.ActivityThread.main(ActivityThread.java:4949)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at java.lang.reflect.Method.invokeNative(Native Method)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at java.lang.reflect.Method.invoke(Method.java:511)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1043)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:810)
11-10 21:17:06.781: E/AndroidRuntime(2526):     at dalvik.system.NativeStart.main(Native Method)

我试着用下面的discu(从堆栈溢出)解决这个问题，但是没有成功。

Lazy Loading (Image + Text) for Linear Layouts

Lazy Image Loader to ListView

Lazy load of images in ListView

Custom Endless ListView Android

Lazy Image Loader to ListView

https://github.com/thest1/LazyList

https://github.com/nostra13/Android-Universal-Image-Loader

Scaling and loading bitmap causes OOM (OutOfMemoryError) (Android)

android
listview
android-listview
EN

回答 2

Stack Overflow用户

回答已采纳

发布于 2013-11-10 22:21:37

首先，您没有在适配器中重用现有的convertView。您应该重用这个视图，而不是每次都膨胀一个新视图：

代码语言：javascript
运行
复制
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        convertView = LayoutInflater.from(contexto).inflate(R.layout.catalogo_item, parent, false);
    }
    ...
}

(注意:您在这里知道项目的父项将是什么( ViewGroup parent参数)，所以您应该使用inflate(id, parent, false);而不是inflate(id, null);来告诉充气器--您几乎不应该调用inflate(id, null))。

这应该可以解决您的问题，因为您不再创建数百个视图，而是回收现有视图。如果没有，您可以在替换位图时显式地回收它们，如下所示：

代码语言：javascript
运行
复制
ImageView imgV = (ImageView) convertView.findViewById(R.id.iv_catalogoitem_imagem);
// Obtain a reference to the old image
Drawable oldImage = imgV.getDrawable();
// Set the new image
imgV.setImageBitmap(getMiniaturaImagem(catalogo.get(position).getPathArquivo()));
// Recycle the old image
if (oldImage != null) {
    ((BitmapDrawable)oldImage).getBitmap().recycle();
}
票数 1
EN

Stack Overflow用户

发布于 2013-11-10 22:30:33

1)使用ActivityManager.getMemoryClass()和ActivityManager.getLargeMemoryClass()验证分配给应用程序的近似值。

2)您可以在清单android中声明大堆大小:largeHeap-“true”

3) Google /O的演示文稿包含一些很好的答案-- apps.pdf

4)如果要以较小的大小显示图像(如缩略图等)，则在加载图像之前将其缩放。

本教程由Google开发人员提供帮助：XOgcRukSoKKjewFJZrKV0&index=61

描述:如果目标位图的大小要小得多，次采样可以加快加载时间，并减少内存中对大位图的需求，尽管很好的理解是，您不能得到特定的位图大小，而只能减少两种大小的大小。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/19895858

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