【发布时间】：2011-03-03 03:35:38
【问题描述】：
我正在使用非常简单的代码来显示存储为可绘制对象的图像库。所有图片的大小均小于 200kb，分辨率为 1024x576 像素。
我的代码在我测试过的 4 台设备上运行良好，并且适用于我的大多数用户。但是他们中的一些人不断遇到著名的虚拟机预算内存问题。
他是我的代码：
在我的活动的 onCreate() 方法中：
// set Factory for Image Switcher
imageSwitcher = (ImageSwitcher) findViewById(R.id.ImageSwitcher);
imageSwitcher.setFactory(new MyImageSwitcherFactory());
工厂类：
private class MyImageSwitcherFactory implements ViewFactory {
public View makeView() {
ImageView imageView = new ImageView(Main.this);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return imageView;
}
}
以及显示图像的代码：
try {
// this is internal image loaded from drawables
imageSwitcher.setImageResource(images.get(imageNumber - 1).imageResourceID);
} catch (Exception e) {
// no image will be shown
}
在 try/catch 块中的某些手机上发生错误（下载的百分比非常小），并且某些手机的活动甚至根本无法启动。
我阅读了有关回收位图和内存泄漏问题的信息，但我的活动在单顶模式下运行，并且不会在方向更改时重新创建，因此它始终是相同的活动。我也不直接使用位图。
我可以改进我的代码以消除这个错误吗？
第一种错误：
java.lang.OutOfMemoryError: bitmap size exceeds VM budget
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:464)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:340)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
at android.content.res.Resources.loadDrawable(Resources.java:1705)
at android.content.res.Resources.getDrawable(Resources.java:580)
at android.widget.ImageView.resolveUri(ImageView.java:548)
at android.widget.ImageView.setImageResource(ImageView.java:270)
at android.widget.ImageSwitcher.setImageResource(ImageSwitcher.java:41)
at com.mobilebabytoys.animalsoundsfree.Main.showNextImage(Main.java:356)
at com.mobilebabytoys.animalsoundsfree.Main.access$0(Main.java:284)
at com.mobilebabytoys.animalsoundsfree.Main$MyGestureDetector.onFling(Main.java:861)
at android.view.GestureDetector.onTouchEvent(GestureDetector.java:517)
at com.mobilebabytoys.animalsoundsfree.Main$8.onTouch(Main.java:218)
at android.view.View.dispatchTouchEvent(View.java:3705)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:874)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1695)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1116)
at android.app.Activity.dispatchTouchEvent(Activity.java:2068)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1679)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1697)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4568)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)
第二种错误：
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mobilebabytoys.animalsoundsfree/com.mobilebabytoys.animalsoundsfree.Main}: android.view.InflateException: Binary XML file line #15: Error inflating class <unknown>
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3812)
at android.app.ActivityThread.access$2300(ActivityThread.java:126)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1936)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4595)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #15: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:513)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
at android.app.Activity.setContentView(Activity.java:1629)
at com.mobilebabytoys.animalsoundsfree.Main.onCreate(Main.java:154)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
... 12 more
Caused by: java.lang.reflect.InvocationTargetException
at android.widget.ImageButton.<init>(ImageButton.java:78)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
at android.view.LayoutInflater.createView(LayoutInflater.java:500)
... 23 more
Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:464)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:340)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
at android.content.res.Resources.loadDrawable(Resources.java:1705)
at android.content.res.Resources.getDrawable(Resources.java:580)
at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:160)
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:788)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:729)
at android.content.res.Resources.loadDrawable(Resources.java:1690)
at android.content.res.TypedArray.getDrawable(TypedArray.java:548)
at android.widget.ImageView.<init>(ImageView.java:115)
at android.widget.ImageButton.<init>(ImageButton.java:82)
... 27 more
android.view.InflateException: Binary XML file line #15: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:513)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
at android.app.Activity.setContentView(Activity.java:1629)
at com.mobilebabytoys.animalsoundsfree.Main.onCreate(Main.java:154)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3812)
at android.app.ActivityThread.access$2300(ActivityThread.java:126)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1936)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4595)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at android.widget.ImageButton.<init>(ImageButton.java:78)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
at android.view.LayoutInflater.createView(LayoutInflater.java:500)
... 23 more
Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:464)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:340)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
at android.content.res.Resources.loadDrawable(Resources.java:1705)
at android.content.res.Resources.getDrawable(Resources.java:580)
at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:160)
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:788)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:729)
at android.content.res.Resources.loadDrawable(Resources.java:1690)
at android.content.res.TypedArray.getDrawable(TypedArray.java:548)
at android.widget.ImageView.<init>(ImageView.java:115)
at android.widget.ImageButton.<init>(ImageButton.java:82)
... 27 more
java.lang.reflect.InvocationTargetException
at android.widget.ImageButton.<init>(ImageButton.java:78)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
at android.view.LayoutInflater.createView(LayoutInflater.java:500)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
at android.app.Activity.setContentView(Activity.java:1629)
at com.mobilebabytoys.animalsoundsfree.Main.onCreate(Main.java:154)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3812)
at android.app.ActivityThread.access$2300(ActivityThread.java:126)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1936)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4595)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:464)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:340)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
at android.content.res.Resources.loadDrawable(Resources.java:1705)
at android.content.res.Resources.getDrawable(Resources.java:580)
at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:160)
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:788)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:729)
at android.content.res.Resources.loadDrawable(Resources.java:1690)
at android.content.res.TypedArray.getDrawable(TypedArray.java:548)
at android.widget.ImageView.<init>(ImageView.java:115)
at android.widget.ImageButton.<init>(ImageButton.java:82)
... 27 more
java.lang.OutOfMemoryError: bitmap size exceeds VM budget
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:464)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:340)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
at android.content.res.Resources.loadDrawable(Resources.java:1705)
at android.content.res.Resources.getDrawable(Resources.java:580)
at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:160)
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:788)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:729)
at android.content.res.Resources.loadDrawable(Resources.java:1690)
at android.content.res.TypedArray.getDrawable(TypedArray.java:548)
at android.widget.ImageView.<init>(ImageView.java:115)
at android.widget.ImageButton.<init>(ImageButton.java:82)
at android.widget.ImageButton.<init>(ImageButton.java:78)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
at android.view.LayoutInflater.createView(LayoutInflater.java:500)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
at android.app.Activity.setContentView(Activity.java:1629)
at com.mobilebabytoys.animalsoundsfree.Main.onCreate(Main.java:154)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3812)
at android.app.ActivityThread.access$2300(ActivityThread.java:126)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1936)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4595)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)
我的活动布局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/MainLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:keepScreenOn="true">
<ImageSwitcher
android:keepScreenOn="true"
android:id="@+id/ImageSwitcher"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</ImageSwitcher>
</RelativeLayout>
【问题讨论】：