解决一个因Bitmap引起的OOM问题

时间:2022-01-20 20:55:38

解决一个因Bitmap引起的OOM问题

发表于1年前(2014-09-29 23:24)   阅读( 105) | 评论(0) 0人收藏此文章, 我要收藏
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解决一个因Bitmap引起的OOM问题

摘要 BitmapFactory.decodeStream引起了OutOfMemory. 在decodeStream之前,通过设置options.inJustDecodeBounds = true;让Bitmap实现虚加载。

 

BitmapFactory.decodeStream引起了OutOfMemory. 
在decodeStream之前,通过设置options.inJustDecodeBounds = true;让Bitmap实现虚加载。

设置options.inJustDecodeBounds = true;让Bitmap实现虚加载。 
使用options.outWidth和options.outHeight获取图片宽和高。 
再使用ImageLoader.getInstance().displayImage加载图片。

public class PhotoViewFragment extends Fragment { private PhotoView mGestureImageView; private Bitmap mBitmap; @Override public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) { View inflateView = inflater.inflate(R.layout.fragment_photo_view_show, container, false); mGestureImageView = (PhotoView) inflateView.findViewById(R.id.image_turn_show_gestureImageView); getBundleData(); try { /*减少内存占用*/ BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; opt.inJustDecodeBounds = true;//虚加载 FileInputStream fis = new FileInputStream(Environment.getExternalStorageDirectory() + File.separator + "abc.png"); mBitmap = BitmapFactory.decodeStream(fis, null, opt); int width = opt.outWidth; int height = opt.outHeight; if (height / width >= 1.6) {//判断横竖图 mGestureImageView.setScaleType(ImageView.ScaleType.CENTER_CROP); } else { mGestureImageView.setScaleType(ImageView.ScaleType.FIT_CENTER); } DisplayImageOptions op = new DisplayImageOptions.Builder() .cacheInMemory(true) // default .build(); Uri uri = Uri.fromFile(new File(Environment.getExternalStorageDirectory() + File.separator + "abc.png")); ImageLoader.getInstance().displayImage(uri.toString(), mGestureImageView, op); } catch (Exception e) { Log.e("Fragment", "onCreateView image-view", e); } return inflateView; } /** * 重置GestureImageView为原大小 */ public void resetGestureImageView() { mGestureImageView.reset(); } /** * 获得Bundle */ private void getBundleData() { Bundle bundle = getArguments(); } @Override public void onPause() { super.onPause(); mGestureImageView.reset(); } @Override public void onDestroy() { super.onDestroy(); if (mBitmap != null && !mBitmap.isRecycled()) { mBitmap.recycle(); mBitmap = null; } } }