Real Path Utility class for Android, works for all API

RealPathUtil.java

import android.annotation.SuppressLint;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.loader.content.CursorLoader;

/**
 * Real Path Utility class for Android.
 * <p>
 * Updated by @ozgurg
 * <p>
 * Source: https://gist.github.com/ImaginativeShohag/476a5ba87824f6e036f6bce10e229079
 */
@SuppressLint("ObsoleteSdkInt")
public class RealPathUtil {
    public static String getRealPath(Context context, Uri fileUri) {
        // SDK < API11
        if (Build.VERSION.SDK_INT < 11) {
            return getRealPathFromURI_BelowAPI11(context, fileUri);
        }

        // SDK >= 11 && SDK < 19
        else if (Build.VERSION.SDK_INT < 19) {
            return getRealPathFromURI_API11to18(context, fileUri);
        }

        // SDK > 19 (Android 4.4) and up
        return getRealPathFromURI_API19(context, fileUri);
    }

    @SuppressLint("NewApi")
    private static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
        String[] projection = {MediaStore.Images.Media.DATA};

        CursorLoader cursorLoader = new CursorLoader(context, contentUri, projection, null, null, null);
        Cursor cursor = cursorLoader.loadInBackground();

        if (cursor != null) {
            int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            String result = cursor.getString(columnIndex);
            cursor.close();
            return result;
        }

        return null;
    }

    private static String getRealPathFromURI_BelowAPI11(@NonNull Context context, Uri contentUri) {
        String[] projection = {MediaStore.Images.Media.DATA};
        Cursor cursor = context.getContentResolver().query(contentUri, projection, null, null, null);

        if (cursor != null) {
            int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            String result = cursor.getString(columnIndex);
            cursor.close();
            return result;
        }

        return null;
    }

    @Nullable
    @SuppressLint("NewApi")
    private static String getRealPathFromURI_API19(Context context, Uri uri) {
        boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                String[] split = docId.split(":");
                String type = split[0];

                // This is for checking Main Memory
                if ("primary".equalsIgnoreCase(type)) {
                    if (split.length > 1) {
                        return Environment.getExternalStorageDirectory() + "/" + split[1];
                    } else {
                        return Environment.getExternalStorageDirectory() + "/";
                    }
                    // This is for checking SD Card
                } else {
                    return "storage" + "/" + docId.replace(":", "/");
                }
            }

            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {
                String fileName = getFilePath(context, uri);
                if (fileName != null) {
                    return Environment.getExternalStorageDirectory().toString() + "/Download/" + fileName;
                }

                String id = DocumentsContract.getDocumentId(uri);
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.parseLong(id));

                return getDataColumn(context, contentUri, null, null);
            }

            // MediaProvider
            else if (isMediaDocument(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                String[] split = docId.split(":");
                String type = split[0];

                Uri contentUri = null;

                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                String selection = "_id=?";
                String[] selectionArgs = new String[]{split[1]};

                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }

        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            // Return the remote address
            if (isGooglePhotosUri(uri)) {
                return uri.getLastPathSegment();
            }

            return getDataColumn(context, uri, null, null);
        }

        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }

        return null;
    }

    @Nullable
    private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
        String column = "_data";
        String[] projection = {column};

        try (Cursor cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null)) {
            if (cursor != null && cursor.moveToFirst()) {
                int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        }

        return null;
    }

    @Nullable
    private static String getFilePath(Context context, Uri uri) {
        String[] projection = {MediaStore.MediaColumns.DISPLAY_NAME};

        try (Cursor cursor = context.getContentResolver().query(uri, projection, null, null, null)) {
            if (cursor != null && cursor.moveToFirst()) {
                int index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DISPLAY_NAME);
                return cursor.getString(index);
            }
        }

        return null;
    }

    private static boolean isExternalStorageDocument(@NonNull Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    private static boolean isDownloadsDocument(@NonNull Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    private static boolean isMediaDocument(@NonNull Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    private static boolean isGooglePhotosUri(@NonNull Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }
}