app/src/main/java/org/apache/fineract/utils/FileUtils.java

package org.apache.fineract.utils;

import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
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 android.util.Log;
import android.webkit.MimeTypeMap;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class FileUtils {

    public static final String LOG_TAG = FileUtils.class.getSimpleName();

    public static String getPathReal(final Context context, final Uri uri) {
        if (AndroidVersionUtil.isApiVersionGreaterOrEqual(Build.VERSION_CODES.KITKAT)) {
            return getPathRealOnKitkatAboveVersion(context, uri);
        } else {
            return getPathOnKitkatBelowVersion(context, uri);
        }
    }

    public static String getPathOnKitkatBelowVersion(Context context, Uri uri) {
        if ("content".equalsIgnoreCase(uri.getScheme())) {
            String[] projection = {"_data"};
            Cursor cursor = null;

            try {
                cursor = context.getContentResolver().query(uri, projection, null, null, null);
                int columnIndex = cursor.getColumnIndexOrThrow("_data");
                if (cursor.moveToFirst()) {
                    return cursor.getString(columnIndex);
                }
            } catch (Exception e) {
                // Eat it
            }
        } else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }

        return null;
    }

    @TargetApi(Build.VERSION_CODES.KITKAT)
    public static String getPathRealOnKitkatAboveVersion(final Context context, final Uri uri) {

        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

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

                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
                // TODO handle non-primary volumes

                // DownloadsProvider
            } else if (isDownloadsDocument(uri)) {

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

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

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

                final String selection = "_id=?";
                final 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;
    }

    public static String getDataColumn(Context context, Uri uri, String selection,
            String[] selectionArgs) {

        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };

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


    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is Google Photos.
     */
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }

    /**
     * This Method for getting File Mime Type
     *
     * @param filePath Path of the file
     * @return String Mime Type
     */
    public static String getMimeType(String filePath) {
        String type = null;
        String extension = MimeTypeMap.getFileExtensionFromUrl(filePath);
        if (extension != null) {
            type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
        }
        return type;
    }

    @NonNull
    public static String getMimeType(@NonNull File file) {
        String type = null;
        final String url = file.toString();
        final String extension = MimeTypeMap.getFileExtensionFromUrl(url);
        if (extension != null) {
            type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension.toLowerCase());
        }
        if (type == null) {
            type = "image/*"; // fallback type. You might set it to */*
        }
        return type;
    }

    /**
     * This Method for writing InputStream into File.
     *
     * @param in   InputStream
     * @param file File
     */
    public static void writeInputStreamDataToFile(InputStream in, File file) {
        try {
            OutputStream out = new FileOutputStream(file);
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
            out.close();
            in.close();
        } catch (Exception e) {
            Log.d(LOG_TAG, e.getLocalizedMessage());
        }
    }

    public static void saveBitmap(Bitmap bitmap, File file) {
        FileOutputStream out = null;
        try {
            out = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
        } catch (Exception e) {
            Log.d(LOG_TAG, e.getLocalizedMessage());
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                Log.d(LOG_TAG, e.getLocalizedMessage());
            }
        }
    }

    public static File createFile(String directoryName, String fileName) {
        File directory = new File(Environment.getExternalStorageDirectory(), directoryName);
        if (directory.exists()) {
            directory.delete();
            directory.mkdirs();
        }
        return new File(directory.getPath(), fileName);
    }
}