Android 获取缩略图

public void getMiniThumb(HttpServletResponse resp) {OutputStream out;try {out = resp.getOutputStream();Cursor c = _resolver.query(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, null, null, null, null);while (c.moveToNext()) {for (int i = 0; i < c.getColumnCount(); i++) {Log.i("getMiniThumb", c.getColumnNames()[i] + "=" + c.getString(i));}Log.i("getMiniThumb", "-------------------------------------------------------------------");}c = _resolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, null, null, null);while (c.moveToNext()) {for (int i = 0; i < c.getColumnCount(); i++) {Log.i("getMiniThumb", c.getColumnNames()[i] + "=" + c.getString(i));}Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(_resolver, c.getLong(0), MediaStore.Images.Thumbnails.MICRO_KIND, null);if (bitmap != null) {Log.i("getMiniThumb", "bitmap is " + bitmap.toString());bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);out.flush();out.write(NEXT_TAG.getBytes());out.flush();} else {Log.i("getMiniThumb", "bitmap is " + null);}Log.i("getMiniThumb", "-------------------------------------------------------------------");}out.close();} catch (Exception e) {e.printStackTrace();} }
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