Android 获取 相册中的所有截图

首先，在 Android 清单文件 (AndroidManifest.xml) 中添加以下权限请求：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

动态申请权限

if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE), MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE)
    return
}

查询系统 MediaStore 的 Images 表来获取所有截图的 Uri，你可以通过设置 selection 条件来只获取截图。这里假设截图保存在 “Screenshots” 文件夹中：

val projection = arrayOf(
    MediaStore.Images.Media._ID,
    MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
    MediaStore.Images.Media.DATE_TAKEN
)
val cursor = contentResolver.query(
    MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
    projection,
    MediaStore.Images.Media.BUCKET_DISPLAY_NAME + " LIKE ?", arrayOf("%Screenshots%"),
    MediaStore.Images.Media.DATE_TAKEN + " DESC"
)
val screenshotUris = ArrayList<Uri>()
if (cursor != null) {
    // 获取索引
    val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID)
    while (cursor.moveToNext()) {
        // 获取图片的uri
        val id = cursor.getLong(idColumn)
        val uri =
        ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, id)
        screenshotUris.add(uri)
        Log.d("测试：screenshotUri",uri.toString())
    }
    cursor.close()
}
Log.d("测试：screenshotUris 数量",screenshotUris.size.toString())