android - 图像，SD卡，安卓

Question

我想编写代码来仅显示来自特定位置的图像SD卡中的文件夹。例如一个名为 (/sdcard/folder/) 的文件夹。我有以下代码，但它显示了SD卡。我应该在以下代码中添加/更改什么以完成我的目标。

我应该更改查询吗？如果是，我应该如何更改它。

请帮帮我。谢谢

`

      String[] img = { MediaStore.Images.Thumbnails._ID };
      imagecursor = managedQuery(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, img, null,null, MediaStore.Images.Thumbnails.IMAGE_ID + "");
      image_column_index = imagecursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
      count = imagecursor.getCount(); 
      imagegrid = (GridView) findViewById(R.id.sdcard);
      imagegrid.setAdapter(new ImageAdapter(getApplicationContext()));
      imagegrid.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView parent, View v,int position, long id) {
                  System.gc();
                  String[] proj = { MediaStore.Images.Media.DATA };
                  actualimagecursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, proj,null, null, null);
                  actual_image_column_index = actualimagecursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                  actualimagecursor.moveToPosition(position);
                  String i = actualimagecursor.getString(actual_image_column_index);
                  System.gc();
                 Intent intent = new Intent(getApplicationContext(), ViewImage.class);
                  intent.putExtra("filename", i);
                  startActivity(intent);
            }
      });
`  

Answer 1

imagecursor = managedQuery(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, img, null,null, MediaStore.Images.Thumbnails.IMAGE_ID + "");

在上一行，您只是传递了 Sd 卡路径(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI)。我会建议为您的路径(card/newfolder/)创建变量并将其传递给 managedQuery

尝试在此处发布此问题的答案 Using ImageGallery to display images from the SD card?