Question

所以我有这个代码用于通过mediastore获取图像：

int dataIndex = mMediaStoreCursor.getColumnIndex(MediaStore.Files.FileColumns.DATA );

mMediaStoreCursor.moveToPosition(position);
String dataString = mMediaStoreCursor.getString(dataIndex);
Uri mediaUri = Uri.parse("file://" + dataString);
return mediaUri;

此商品获取图片文件夹中的所有图片，我想更改它以获取特定文件夹中的所有图片，这些图片将作为字符串传递。例如{ android/picture/specificfolder/}

Answer 1

选中此post

建议您使用光标并传递投影中所需的文件夹。

帖子的相关答案：

mediaCursor = getContentResolver().query( MediaStore.Files.getContentUri("external"),
                null,
                MediaStore.Images.Media.DATA + " like ? ",
                new String[] {"%YOUR_FOLDER_NAME%"},
                null);

Answer 2

您可以使用以下方法 -

public List<String> getFromSdcard()
{
    ArrayList<String> imagePaths = new ArrayList<String>();// list of file paths
    File[] listFile;
    File file= new 

    File(android.os.Environment.getExternalStorageDirectory(),"android/picture/specificfolder/");

    if (file.isDirectory())
    {
        listFile = file.listFiles();


        for (int i = 0; i < listFile.length; i++)
        {

            imagePaths.add(listFile[i].getAbsolutePath());

        }
    }
    return imagePaths;
}

使用

来检索图像

List<String> sample = getFromSdcard();

    for(int i=0; i<sample.size() ; i++){
      final Uri image = Uri.parse("file://"+sample(i).toString());
    }

Answer 3

val DIRECTORY_NAME = "%your_folder_name%"

val selection = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
    MediaStore.MediaColumns.RELATIVE_PATH + " like ? "
else MediaStore.Images.Media.DATA + " like ? "

val selectionArgs = arrayOf(APP_RESOURCE_DIRECTORY_NAME)

val cursor = context.contentResolver.query(
        MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
        null,
        selection,
        selectionArgs,
        null)

如何设置MEDIASTORE从android上的特定文件夹中获取图像

3 个答案: