Android的ViewPager与片段控股ImageView

Question

我有一个ViewPager显示新闻条目的详细信息。你可以在30个条目之间来回滑动。这些条目中的每一个都是保存ImageView的View。该ImageView使用Picasso图像库从URL填充图像。

它工作正常，但有时当我几乎经历了所有的各个项目（片段）我的应用程序突然崩溃，轻扫收到此错误：

Caused by: java.lang.OutOfMemoryError 
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) 
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:594) 
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:429) 
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:840) 
at android.content.res.Resources.loadDrawable(Resources.java:2208) 
at android.content.res.TypedArray.getDrawable(TypedArray.java:602) 
at android.widget.ImageView.<init>(ImageView.java:129) 
at android.widget.ImageView.<init>(ImageView.java:119) 
at java.lang.reflect.Constructor.constructNative(Native Method) 
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
at android.view.LayoutInflater.createView(LayoutInflater.java:594) 
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56) 
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
at com.app.mobil.fragment.placeholder.FanpicPlaceholderFragment.onCreateView(FanpicPlaceholderFragment.java:92) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1504) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:942) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484) 
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:482) 
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141) 
at android.support.v4.view.ViewPager.populate(ViewPager.java:1073) 
at android.support.v4.view.ViewPager.populate(ViewPager.java:919) 
at android.support.v4.view.ViewPager$3.run(ViewPager.java:249) 
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761) 
at android.view.Choreographer.doCallbacks(Choreographer.java:574) 
at android.view.Choreographer.doFrame(Choreographer.java:543) 
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747) 
at android.os.Handler.handleCallback(Handler.java:733) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:136) 
at android.app.ActivityThread.main(ActivityThread.java:5139) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612) 
at dalvik.system.NativeStart.main(Native Method) 

而且刷卡时我有时会收到下面的logcat消息（当当前视图中包含加载到ImageView的大图像）：

09-25 13:19:59.816 31859-32208/com.app.mobile E/dalvikvm-heap﹕ Out of memory on a 3276816-byte allocation. 

我对整个事情的一个问题：我与毕加索装入ImageViews的图像有时是相当大的（〜每幅图像3MB）。

有人可以向我解释我做错了什么吗？

Answer 1

试试这个：

android:largeHeap="true" 

在你的清单，在应用程序标签

Answer 2

变换图像转换为布局使用，以减少内存大小下面的代码 -

Picasso.with（上下文）.load （url）.resize（width，height）.into（imageView）

确保您使用的是毕加索的libr ary with version - 2.3.4