来自资源的大图像获得exception

我按照以下链接中的示例： Android中的Viewpager示例

它的工作正常但是当我放置我自己的高分辨率图像（大尺寸）时，它给了我例外：

java.lang.OutOfMemoryError：位图大小超过VM预算 。

我发布了一个关于该问题的旧问题，但由于这个原因它关闭了它，我尝试并搜索了很多，最后我发现解决方案是：通过以下方式缩放我的图像以避免内存exception：

作者在stackfllow和android开发网站的建议和答案，我以波纹管代码结束，这也以相同的exception结束，我认为我的代码中有一些错误，因为我仍在学习java和android开发，但那我能结束有，请任何帮助或建议将不胜感激，

谢谢 。

我的代码：

ViewPagerAdapter

public class ViewPagerAdapter extends PagerAdapter { Activity activity; int imageArray[]; public ViewPagerAdapter(Activity act, int[] imgArra) { imageArray = imgArra; activity = act; } public int getCount() { return imageArray.length; } public Object instantiateItem(View collection, int position) { ImageView view = new ImageView(activity); view.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); view.setScaleType(ScaleType.FIT_XY); view.setBackgroundResource(imageArray[position]); ((ViewPager) collection).addView(view, 0); return view; } @Override public void destroyItem(View arg0, int arg1, Object arg2) { ((ViewPager) arg0).removeView((View) arg2); } @Override public boolean isViewFromObject(View arg0, Object arg1) { return arg0 == ((View) arg1); } @Override public Parcelable saveState() { return null; } public static Bitmap decodeSampledBitmapFromResource(String imageArra, int reqWidth, int reqHeight) { // First decode with inJustDecodeBounds=true to check dimensions final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile(imageArra, options); // Calculate inSampleSize options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); // Decode bitmap with inSampleSize set options.inJustDecodeBounds = false; return BitmapFactory.decodeFile(imageArra, options); } public static int calculateInSampleSize( BitmapFactory.Options options, int reqWidth, int reqHeight) { // Raw height and width of image final int height = options.outHeight; final int width = options.outWidth; int inSampleSize = 1; if (height > reqHeight || width > reqWidth) { if (width > height) { inSampleSize = Math.round((float)height / (float)reqHeight); } else { inSampleSize = Math.round((float)width / (float)reqWidth); } } return inSampleSize;}} 

PageIndicatorActivity ：

  public class PageIndicatorActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ViewPagerAdapter adapter = new ViewPagerAdapter(this, imageArra); ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager); myPager.setAdapter(adapter); myPager.setCurrentItem(0); } private int imageArra[] = { R.drawable.one, R.drawable.two, R.drawable.three, R.drawable.four, R.drawable.five, R.drawable.six, R.drawable.seven, R.drawable.eight,R.drawable.nine, R.drawable.ten }; } 

logcat堆栈 ：

  FATAL EXCEPTION: main java.lang.OutOfMemoryError: bitmap size exceeds VM budget at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:563) at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:439) at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697) at android.content.res.Resources.loadDrawable(Resources.java:1709) at android.content.res.Resources.getDrawable(Resources.java:581) at android.view.View.setBackgroundResource(View.java:7586) at com.horizontalscrollviewwithpageindicator.ViewPagerAdapter.instantiateItem (ViewPagerAdapter.java:33) at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java:110) at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:692) at android.support.v4.view.ViewPager.populate(ViewPager.java:875) at android.support.v4.view.ViewPager.populate(ViewPager.java:772) at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1234) at android.view.View.measure(View.java:8366) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017) at android.widget.LinearLayout.measureVertical(LinearLayout.java:386) at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) at android.view.View.measure(View.java:8366) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) at android.view.View.measure(View.java:8366) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) at android.view.View.measure(View.java:8366) at android.view.ViewRoot.performTraversals(ViewRoot.java:844) at android.view.ViewRoot.handleMessage(ViewRoot.java:1865) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:3687) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:507) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) at dalvik.system.NativeStart.main(Native Method) 

Answer 1

你永远不会使用这种方法来缩放图像，你的inSampleSize也需要是2的幂（我相信）。 这些图像太大了（你在上一篇文章中说过的是4.5 MB）。 在存储的巨大位图之上，视图寻呼机在任何给定时间在内存中保留3个视图。 为视图寻呼机分配的内存大小> 13.5mb。 使用以下内容替换实例化视图：

 ImageView myView = new ImageView(context); BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 4; Bitmap bitmap = BitmapFactory.decodeResource(activity.getResouces(), imageArray[position], options ); myView.setImageBitmap(bitmap); ((ViewPager) view).addView(myView); return myView; 

如果仍然提供错误，请使用options.inSampleSize = 8;

Answer 2

请尝试以下提示。

– Android适用于.png图像，其中.jpg格式的相同大小的图像会产生OutOfMemoryError 。

有关官方Android开发者网站的解决方案，请参阅此链接：

http://developer.android.com/training/displaying-bitmaps/load-bitmap.html