Android ContentResolver Read readBytes(Uri uri, ContentResolver resolver)

Description

Read bytes.

License

Open Source License

Parameter

Parameter	Description
uri	the uri
resolver	the resolver

Exception

Parameter	Description
IOException	Signals that an I/O exception has occurred.

Return

the byte[]

Declaration

private static byte[] readBytes(Uri uri, ContentResolver resolver)
        throws IOException 

Method Source Code

//package com.java2s;
/*//from w w w  .  j a v  a  2 s  .c  om
 * Odoo, Open Source Management Solution
 * Copyright (C) 2012-today Odoo SA (<http:www.odoo.com>)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http:www.gnu.org/licenses/>
 * 
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.content.ContentResolver;

import android.net.Uri;

public class Main {
    /**
     * Read bytes.
     * 
     * @param uri
     *            the uri
     * @param resolver
     *            the resolver
     * @return the byte[]
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    private static byte[] readBytes(Uri uri, ContentResolver resolver)
            throws IOException {
        // this dynamically extends to take the bytes you read
        InputStream inputStream = resolver.openInputStream(uri);
        ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();

        // this is storage overwritten on each iteration with bytes
        int bufferSize = 1024;
        byte[] buffer = new byte[bufferSize];

        // we need to know how may bytes were read to write them to the
        // byteBuffer
        int len = 0;
        while ((len = inputStream.read(buffer)) != -1) {
            byteBuffer.write(buffer, 0, len);
        }

        // and then we can return your byte array.
        return byteBuffer.toByteArray();
    }
}

Related

1. fileUriToBase64(Uri uri, ContentResolver resolver)
2. getContentFromProvider( ContentResolver contentResolver, Uri uri, String[] valueTypes)
3. getExifOrientation(ContentResolver cr, Uri uri)