InternalStorageContentProvider.java

package com.common.utils;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.support.annotation.NonNull;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;

/*
 * The solution is taken from here: http://stackoverflow.com/questions/10042695/how-to-get-camera-result-as-a-uri-in-data-folder
 */

public class InternalStorageContentProvider extends ContentProvider {
    public static final Uri CONTENT_URI = Uri.parse("content://eu.janmuller.android.simplecropimage.example/");
	private static final HashMap<String, String> MIME_TYPES = new HashMap<>();
	public static final String TEMP_PHOTO_FILE_NAME = "temp_photo.png";
	static {
		MIME_TYPES.put(".jpg", "image/jpeg");
		MIME_TYPES.put(".jpeg", "image/jpeg");
	}

	@Override
	public boolean onCreate() {
		try {
			@SuppressWarnings("ConstantConditions") File mFile = new File(getContext().getFilesDir(), TEMP_PHOTO_FILE_NAME);
			if(!mFile.exists()) {
				//noinspection ResultOfMethodCallIgnored
				mFile.createNewFile();
				getContext().getContentResolver().notifyChange(CONTENT_URI, null);
			}
			return (true);
		}
		catch (NullPointerException | IOException e) {
			e.printStackTrace();
		}
		return false;
	}
	
	@Override
	public String getType(@NonNull Uri uri) {
		String path = uri.toString();
		for (String extension : MIME_TYPES.keySet()) {
			if (path.endsWith(extension)) {
				return (MIME_TYPES.get(extension));
			}
		}
		return (null);
	}
	
	@Override
	public ParcelFileDescriptor openFile(@NonNull Uri uri, @NonNull String mode) throws FileNotFoundException {
		try {
			@SuppressWarnings("ConstantConditions") File f = new File(getContext().getFilesDir(), TEMP_PHOTO_FILE_NAME);
			if (f.exists()) {
				return (ParcelFileDescriptor.open(f, ParcelFileDescriptor.MODE_READ_WRITE));
			}
		}
		catch (NullPointerException e) {
			e.printStackTrace();
		}
		throw new FileNotFoundException(uri.getPath());
	}
	
	@Override
	public int delete(@NonNull Uri uri, String selection, String[] selectionArgs) {
		return 0;
	}
	
	@Override
	public Uri insert(@NonNull Uri uri, ContentValues values) {
		return null;
	}
	
	@Override
	public Cursor query(@NonNull Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
		return null;
	}
	
	@Override
	public int update(@NonNull Uri uri, ContentValues values, String selection, String[] selectionArgs) {
		return 0;
	}
}