Android往相册指定目录写入图片和读取相册指定目录的所有图片

往指定目录写入图片

 fun save(view: View) {
        val bitmap = BitmapFactory.decodeResource(resources, R.drawable.meta_image_home_bg)
        val contentValues = contentValuesOf(
            MediaStore.MediaColumns.DISPLAY_NAME to System.currentTimeMillis().toString(),
            MediaStore.MediaColumns.MIME_TYPE to "image/jpeg",
            MediaStore.MediaColumns.RELATIVE_PATH to "Pictures/马车保元界/"
        )
        contentResolver.insert(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            contentValues
        )?.apply {
            contentResolver.openOutputStream(this)
                .use {
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, it)

                }
        }
    }

读取指定目录的图片

 private fun loadTargetFilePhotos(name: String) {
        val result = contentResolver.query(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            arrayOf(
                MediaStore.Images.Media.DATA,
                MediaStore.Images.Media._ID,
                MediaStore.Images.Media.BUCKET_DISPLAY_NAME
            ),
            MediaStore.Images.Media.BUCKET_DISPLAY_NAME + " = ?",
            arrayOf(name),
            null
        )

        result?.apply {
            val count = count
            if (moveToFirst()) {
                val dataColumn = getColumnIndex(MediaStore.Images.Media.DATA)
                val bucketColumn = getColumnIndex(MediaStore.Images.Media.BUCKET_DISPLAY_NAME)
                do {
                    val path = this.getString(dataColumn)
                    val bucket = this.getString(bucketColumn)

                    val uri = Uri.parse(path)

                    Log.d("loadTargetFilePhotos", path)
                } while (moveToNext())
            }
            close()
        }
    }