DocumentContentProvider.java

package org.ebookdroid.common.provider;

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

import java.io.File;
import java.io.FileNotFoundException;

public class DocumentContentProvider extends ContentProvider {

    @Override
    public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
        File file = new File(uri.getPath());

        if (file.exists()) {
            return ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
        }

        throw new FileNotFoundException(uri.getPath());
    }

    @Override
    public boolean onCreate() {
        return true;
    }

    @Override
    public String getType(Uri uri) {
        return uri.getQuery();
    }

    @Override
    public Uri insert(Uri uri, ContentValues contentValues) {
        return uri;
    }

    @Override
    public int delete(Uri uri, String s, String[] strings) {
        return 0;
    }

    @Override
    public int update(Uri uri, ContentValues contentValues, String s, String[] strings) {
        return 0;
    }

    @Override
    public Cursor query(Uri uri, String[] strings, String s, String[] strings1, String s1) {
        return null;
    }
}