图像保存到画廊后，它说“没有缩略图” - android位图

Question

我有点击方法将图像保存到画廊。单击“保存”后，文件夹在图库中创建，但是当我进入图库时，它显示“没有缩略图”... 这是我的代码：

 String root = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).toString();
                File myDir = new File(root + "/PhotoEditor ");
                myDir.mkdirs();
                Random generator = new Random();
                int n = 10000;
                n = generator.nextInt(n);
                String fname = "Image-" + n + ".jpg";
                File file = new File(myDir, fname);
                if (file.exists())
                    file.delete();
                try {
                    FileOutputStream out = new FileOutputStream(file);
                    if (sb != null) {
                        sb.compress(Bitmap.CompressFormat.JPEG, 90, out);
                    }
                    out.flush();
                    out.close();
                }
                catch (Exception e) {
                    e.printStackTrace();
                }
                Toast.makeText(ShowPhotoActivity.this,"Your image is saved to gallery",Toast.LENGTH_LONG).show();


                // Tell the media scanner about the new file so that it is
                // immediately available to the user.
                MediaScannerConnection.scanFile(ShowPhotoActivity.this, new String[] { file.toString() }, null,
                        new MediaScannerConnection.OnScanCompletedListener() {
                            public void onScanCompleted(String path, Uri uri) {
                                Log.i("ExternalStorage", "Scanned " + path + ":");
                                Log.i("ExternalStorage", "-> uri=" + uri);
                            }
                        });

Answer 1

你能记录“file.toString()”然后看看你得到了什么吗？您可能需要传递绝对路径： file.getAbsolutePath() 而不是调用 file.toString() 但它很难诊断。关闭流后，您是否使用文件管理器应用确认 jpg 确实存在？