Util.java 文件源码

/**
 * Returns the in memory size of the given {@link Bitmap} in bytes.
 */
@TargetApi(Build.VERSION_CODES.KITKAT)
public static int getBitmapByteSize(Bitmap bitmap) {
  // The return value of getAllocationByteCount silently changes for recycled bitmaps from the
  // internal buffer size to row bytes * height. To avoid random inconsistencies in caches, we
  // instead assert here.
  if (bitmap.isRecycled()) {
    throw new IllegalStateException("Cannot obtain size for recycled Bitmap: " + bitmap
        + "[" + bitmap.getWidth() + "x" + bitmap.getHeight() + "] " + bitmap.getConfig());
  }
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    // Workaround for KitKat initial release NPE in Bitmap, fixed in MR1. See issue #148.
    try {
      return bitmap.getAllocationByteCount();
    } catch (NullPointerException e) {
      // Do nothing.
    }
  }
  return bitmap.getHeight() * bitmap.getRowBytes();
}