SearchPdfFilesWithPermisson

MainActivity.kt

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        checkPermission()
        displayPdfFiles(this)

    }

    fun displayPdfFiles(context: Context) {
        //count time

        val pdfFiles = mutableListOf<String>()
        val selection = MediaStore.Files.FileColumns.MIME_TYPE + "=?"
        val selectionArgs = arrayOf("application/pdf")
        val uri = MediaStore.Files.getContentUri("external")
        val projection = arrayOf(
            MediaStore.Files.FileColumns._ID,
            MediaStore.Files.FileColumns.TITLE,
            MediaStore.Files.FileColumns.SIZE,
            MediaStore.Files.FileColumns.DATE_ADDED
        )
        val sortOrder = MediaStore.Files.FileColumns.DATE_ADDED + " DESC"

        context.contentResolver.query(uri, projection, selection, selectionArgs, sortOrder)
            ?.use { cursor ->
                Log.d("checkpdffiles", "Found ${cursor.count} PDF files")
                val endtime = System.currentTimeMillis()
                val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns._ID)
                val titleColumn = cursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.TITLE)
                while (cursor.moveToNext()) {
                    val id = cursor.getLong(idColumn)
                    val title = cursor.getString(titleColumn)
                    val contentUri = ContentUris.withAppendedId(uri, id)
                    Log.d("checkpdffiles", "Found PDF file: $title $contentUri")
                    pdfFiles.add(title)
                }
            }
    }

    private fun checkPermission() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
            if (!Environment.isExternalStorageManager()) {
                val intent = Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION)
                intent.addCategory("android.intent.category.DEFAULT")
                intent.data = Uri.parse(String.format("package:%s", this.packageName))
                startActivity(intent, Bundle.EMPTY)
            }
        }
    }
}