Android 在MediaStore managedQuery中指定文件夹

Android 在MediaStore managedQuery中指定文件夹,android,sd-card,mediastore,Android,Sd Card,Mediastore,您好,我想在SD卡上指定一个文件夹,以检索该文件夹(例如,/mnt/sdcard/folder/subfolder)子文件夹中的所有图像。我有这个: public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.gallery); GridView gridview = (GridView) findViewById

您好,我想在SD卡上指定一个文件夹,以检索该文件夹(例如,/mnt/sdcard/folder/subfolder)子文件夹中的所有图像。我有这个:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.gallery);
    GridView gridview = (GridView) findViewById(R.id.gallery);
    registerForContextMenu(gridview);

    id = getIntent().getExtras().getString("ID");

    // Set up an array of the Thumbnail Image ID column we want
    String[] projection = {MediaStore.Images.Thumbnails._ID};
    // Create the cursor pointing to the SDCard
    cursor = managedQuery( MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
            projection, // Which columns to return
            null,       // Return all rows
            null,
            MediaStore.Images.Thumbnails.IMAGE_ID);
    // Get the column index of the Thumbnails Image ID
    columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
在gridview的setAdapter中,我有:

gridview.setAdapter(new BaseAdapter() {
        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView picturesView;
            if (convertView == null) {
                picturesView = new ImageView(mContext);
                // Move cursor to current position
                cursor.moveToPosition(position);
                // Get the current value for the requested column
                int imageID = cursor.getInt(columnIndex);
                // Set the content of the image based on the provided URI
                picturesView.setImageURI(Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, "" + imageID));
                picturesView.setScaleType(ImageView.ScaleType.FIT_CENTER);
                picturesView.setPadding(8, 8, 8, 8);
                picturesView.setLayoutParams(new GridView.LayoutParams(100, 100));
            }
            else {
                picturesView = (ImageView)convertView;
            }
            return picturesView;
        }

        public int getCount() {
            return cursor.getCount();
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

    });
这是工作,但给我看SD卡中包含的所有图像。。。 我尝试设置URI路径,如“content:///mnt/sdcard/folder/subfolder“但它不起作用……如何在MediaStore managedQuery中指定要扫描的特定文件夹?”

提前谢谢大家!:)

尝试获取字段-它包含图像文件的完整路径。然后,您可以通过光标运行并仅选择您感兴趣的文件,或者构建查询,使其仅返回路径为“LIKE%your\u folder\u name%”的条目。

尝试获取字段-它包含图像文件的完整路径。然后,您可以运行光标,只选择您感兴趣的文件,或者构建查询,使其只返回路径为“像%your\u folder\u name%”的条目