ViewPager给出内存不足错误

Question

我已经实现了一个ViewPager,它给了我一个Out Of Memory错误,我无法弄清楚为什么会这样.我有大约11个图像显示,每个图像大约500 kb(磁盘大小),它们是.jpg格式.

这是代码:

public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bmw_gallery);

ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
}

private class ImagePagerAdapter extends PagerAdapter {
private int[] mImages = new int[] {
    R.drawable.bmw_1series_3door_wallpaper_01,
    R.drawable.bmw_1series_3door_wallpaper_02,
    R.drawable.bmw_1series_3door_wallpaper_03,
    R.drawable.bmw_1series_3door_wallpaper_04,
    R.drawable.bmw_1series_3door_wallpaper_05,
    R.drawable.bmw_1series_3door_wallpaper_06,
    R.drawable.bmw_1series_3door_wallpaper_07,
    R.drawable.bmw_1series_3door_wallpaper_08,
    R.drawable.bmw_1series_3door_wallpaper_09,
    R.drawable.bmw_1series_3door_wallpaper_11,
    R.drawable.bmw_1series_3door_wallpaper_12
};

@Override
public int getCount() {
  return mImages.length;
}

@Override
public boolean isViewFromObject(View view, Object object) {
  return view == ((ImageView) object);
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
  Context context = MainActivity.this;
  ImageView imageView = new ImageView(context);
  imageView.setAdjustViewBounds(true);

  imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

  imageView.setImageResource(mImages[position]);
  ((ViewPager) container).addView(imageView, 0);
  return imageView;
}


@Override
public void destroyItem(View collection, int position, Object o) {
    View view = (View)o;
    ((ViewPager) collection).removeView(view);
    view = null;
}


}



}

我做错了什么或我的代码中缺少什么？

Answer 1

磁盘上的500KB JPEG映像将占用更多的堆空间.

例如,我这里有一个数码照片是494KB,用1455 X 1029如果我到加载到Android应用的分辨率,这将消耗的堆空间1455x1029x3 = 4.3MB.如果您有11个具有相似特征的图像,则它们将消耗> 40MB.大多数设备每个进程有16-32MB的堆空间.

如果你想运送11个可抽取的资源(在这种情况下,可能会让你被宝马起诉的图像),你需要有更小的图像.