相册获取图片报OOM异常解决办法

获取一个图片容易报OOM异常,这里做个笔记,但是这个会把图片搞得很模糊,图片的质量有所下降,后续会完善

 private void setPic(ImageView imageView, Uri uri) {        if (getActivity() != null) {            //获取目标控件的大小            int targetW = imageView.getWidth();            int targetH = imageView.getHeight();            BitmapFactory.Options bmOptions = new BitmapFactory.Options();            try {             //inJustDecodeBounds为true，可以加载源图片的尺寸大小，decodeStream方法返回的bitmap为null                bmOptions.inJustDecodeBounds = true;                BitmapFactory.decodeStream(getActivity().getContentResolver().openInputStream(uri), null, bmOptions);                // 得到源图片的尺寸                int photoW = bmOptions.outWidth;                int photoH = bmOptions.outHeight;                //通过比较获取较小的缩放比列                int scaleFactor = Math.min(photoW / targetW, photoH / targetH);                // 将inJustDecodeBounds置为false，设置bitmap的缩放比列                bmOptions.inJustDecodeBounds = false;                bmOptions.inSampleSize = scaleFactor;                bmOptions.inPurgeable = true;                //再次decode获取bitmap                Bitmap bitmap = BitmapFactory.decodeStream(getActivity().getContentResolver().openInputStream(uri), null, bmOptions);                imageView.setImageBitmap(bitmap);            } catch (FileNotFoundException e) {                e.printStackTrace();            }        }    }