ViewPager（一）展示图片OOM

拼搏现实的明天。 2022-05-26 00:26 150阅读 0赞

为了防止OOM，首先ViewPager的预缓存不要设置太多，不设置为1，建议不设置，只缓存一个。

一开始不懂ViewPagerde缓存机制，未解决OOM写了一个4个VIew的缓存才解决，其实不用这么麻烦，参考如下Adapter的写法就可以避免OOM的问题。项目中是展示手机中所有图片的demo，测试不会OOM了。

public class PagerAdapter extends android.support.v4.view.PagerAdapter {
        private Context mContext;
        private List<String> mData;
        private LayoutInflater mInflater;
    
        public PagerAdapter(Context context, List<String> data) {
            mContext = context;
            mData = data;
            mInflater = LayoutInflater.from(mContext);
        }
    
        @Override
        public int getCount() {
            return mData.size();
        }
    
        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view == object;
        }
    
        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            View view = mInflater.inflate(R.layout.pager_adapter_item, null, false);
            ImageView imageView = (ImageView) view.findViewById(R.id.imageView);
            Glide.with(mContext)
                    .load(mData.get(position))
                    .diskCacheStrategy(DiskCacheStrategy.SOURCE)
                    .into(imageView);
            container.addView(view);
            return view;
        }
    
        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            container.removeView((View) object);
        }
    }

demo地址 [点击打开链接][Link 1]

https://github.com/xueqin123/viewpageroom

[Link 1]: https://github.com/xueqin123/viewpageroom