保存到本地文件夹android时减小图像大小

Question

我想在保存到本地文件夹的同时缩小图像大小。现在它以原始大小存储。我将整个位图存储到路径如下：

                String fileName = "image_" + count++ + ".png";

                System.out.println("file name is : " + fileName);

                File sd = Environment.getExternalStorageDirectory();
                File folder = new File(sd + "/Wallpaper Pack");
                System.out.println("folder is : " + folder);
                folder.mkdir();

                File dest = new File(folder, fileName);
                try {
                    FileOutputStream out;
                    out = new FileOutputStream(dest);
                    bitmap.compress(Bitmap.CompressFormat.PNG, 50, out);
                    out.flush();
                    out.close();

                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

Answer 1

调整Bitmap的大小。看看example。此外，在使用PNG格式时，(Bitmap.CompressFormat.PNG, 50, out);压缩也不会发生。它始终为100，因此您可以将输出格式更改为JPEG。