只要你记住下面几个原则,在android 中处理图片的OOM问题绝对是easy之极:
1.超大图片要按比例压缩之后才做显示,退出当前activity 必须回收
public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId, int reqWidth, int reqHeight) { // First decode with inJustDecodeBounds=true to check dimensions final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeResource(res, resId, options); // Calculate inSampleSize options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); // Decode bitmap with inSampleSize set options.inJustDecodeBounds = false; return BitmapFactory.decodeResource(res, resId, options); }
关于inSampleSize 可根据自己的实际情况去定。
if (bitmap != null && !bitmap.isRecycled()) { bitmap.recycle(); bitmap = null;}2.大图片(30~50k)的可直接显示,退出当前activity 立即回收
if (bitmap != null && !bitmap.isRecycled()) { bitmap.recycle(); bitmap = null;}
3.大量的小图 或者不同size的图片要展示,请参看我的另外一篇LRU算法缓存图片的:http://blog.csdn.net/androidzhaoxiaogang/article/details/8211649