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我有一个使用ViewPager的图像查看器。每个片段上都有一个大的图像。这一段时间运行良好,但在足够的图像后,应用程序内存不足。如何在ViewPager片段中处理图像回收?
为了解决这个问题,我试图回收的位图,但这会导致另一个问题:如果我刷回,回收的位图引起RuntimeException
:
java.lang.RuntimeException: Canvas: trying to use a recycled bitmap [email protected]
片段代码如下所示:
Bitmap m_image = null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View root = inflater.inflate(R.layout.fragment_image, container, false);
final ImageView img = (ImageView)root.findViewById(R.id.ivImage);
img.setVisibility(View.GONE);
Picasso.with(getContext())
.load(getArguments().getString("url"))
.into(new Target()
{
@Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from)
{
m_image = bitmap;
img.setImageBitmap(m_image);
img.setVisibility(View.VISIBLE);
}
@Override
public void onBitmapFailed(Drawable errorDrawable)
{
}
@Override
public void onPrepareLoad(Drawable placeHolderDrawable)
{
}
});
return root;
}
@Override
public void onDestroyView()
{
if(m_image != null)
{
m_image.recycle();
m_image = null;
}
super.onDestroyView();
}
和保持该ViewPager活动如下:
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image);
final DataHandler dataHandler = getApp().getDataHandler();
PagerAdapter adapter = new FragmentStatePagerAdapter(getSupportFragmentManager())
{
@Override
public Fragment getItem(int position)
{
Entry e = dataHandler.get(position);
Fragment f = new ImageFragment();
Bundle args = new Bundle();
args.putString("url", e.getURL());
f.setArguments(args);
return f;
}
@Override
public int getCount()
{
return dataHandler.getCount();
}
});
ViewPager pager = (ViewPager)findViewById(R.id.vpImages);
pager.setAdapter(adapter);
}
啊,我还以为它会,但似乎早些时候,我用不同的方法,其中片段不正确销毁视图分页。之后,出现了导致内存不足错误的特大图像。调整图像大小完美。谢谢! – manabreak